Abstract

A cable defect positioning method and system based on a convolutional neural network, and an electronic device. The method comprises: establishing a defective cable transmission model for a cable to be tested having n defects, and on the basis of the defective cable transmission model, acquiring a total reflection signal after an initial incident signal is reflected by the n defects, wherein n is a positive integer (S11); taking the total reflection signal as an input of a trained first convolutional neural network, and extracting time domain features corresponding to the n defects by the first convolutional neural network (S12); and establishing a probability distribution model for the time domain features, and on the basis of the probability distribution model, respectively obtaining first defect positions in one-to-one correspondence with the n defects (S13). By using the method, the accuracy of cable defect positioning can be improved.

IPC Classes  ?

• G01R 31/08 - Locating faults in cables, transmission lines, or networks

Abstract

An electro-thermal aging test platform for a solid insulating material, comprising a voltage regulating system (1), a relay protection apparatus (2), a test apparatus (3), a temperature control system (4), and a timing apparatus (5). The voltage regulating system (1) is configured to output a regulable voltage to the test apparatus (3) by means of the relay protection apparatus (2). The relay protection apparatus (2) is configured to prevent a current from being excessive large. When the current is excessive large, the relay protection apparatus (2) is disconnected. The temperature control system (4) is configured to provide a controllable temperature environment for the test apparatus (3). The timing apparatus (5) is electrically connected to the voltage regulating system (1) and is configured to record a voltage applying time of the voltage regulating system (1). The test apparatus (3) is configured to perform an electro-thermal aging test on a solid insulating material test sample under a given voltage and temperature condition. According to the test platform, the electro-thermal aging test on a solid insulating material under a high temperature and high field strength condition can be implemented, and the disadvantage that the solid insulating material can only be tested under a single factor is overcome.

IPC Classes  ?

• G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere
• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01N 17/00 - Investigating resistance of materials to the weather, to corrosion or to light
• G01N 25/00 - Investigating or analysing materials by the use of thermal means

Abstract

The present invention discloses a gas-insulating medium and its application. The gas-insulating medium includes the following components by mass: 8.4-76.7 parts of trans-1,1,1,4,4,4-hexafluoro-2-butene, and 23.3-91.6 parts of octafluorocyclobutane. The gas-insulating medium of the present invention has a dielectric strength better sulfur hexafluoride, and a low liquefaction temperature, and can be applied in a wider temperature range. In addition, the gas-insulating medium in certain compositions has similar properties with a single component insulating gas. when the gas leaks, the ratio of trans-1,1,1,4,4,4-hexafluoro-2-butene and octafluorocyclobutane remains unchanged, and during the maintenance of electrical equipment, trans-1,1,1,4,4,4-hexafluoro-2-butene and octafluorocyclobutane can be directly supplemented according to a certain ratio, without other operations such as analysis and detection. In addition, the gas-insulating medium of the present invention has good environmental protection performance, the GWP value is low, and the ODP value is 0.

IPC Classes  ?

• H01B 3/56 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances gases

Abstract

A TMR sensor-based non-contact current measuring device, comprising a TMR sensor module, a differential processing module, a signal processing module, and an intelligent control module. The TMR sensor module is used for acquiring a detection signal and transmitting the detection signal to the differential processing module; the differential processing module is used for performing differential amplification, filtering and conversion processing on the detection signal to output a single-ended signal; the signal processing module is used for performing inverting amplification processing on the single-ended signal to obtain a control signal; and the intelligent control module is used for receiving the control signal and implementing control. According to the TMR sensor-based non-contact current measuring device, a current detection signal is obtained on the basis of the TMR sensor module, differential amplification, filtering and conversion processing are performed on the current detection signal by means of the differential processing module to output a single-ended signal, and inverting amplification processing is performed on the single-ended signal by means of the signal processing module, thereby improving the detection signal precision, and thus improving the accuracy of current detection.

IPC Classes  ?

• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices

Abstract

The present invention belongs to the technical field of fluorine chemical industry, specifically relates to a preparation method of trans-1,1,1,4,4,4-hexafluoro-2-butene, comprising the following steps: preheating trans-2-ethoxy-1,1,1,4,4,4-hexafluoro-2-butene, mixing with hydrogen, reacting to obtain trans-1,1,1,4,4,4-hexafluoro-2-butene under the action of a catalyst. The selectivity of trans 1,1,1,4,4,4-hexafluoro-2-butene prepared by the preparation method of the present invention can reach 99%, the preparation method adopts moderate reaction temperature and produces less three wastes. The trans 1,1,1,4,4,4-hexafluoro-2-butene prepared by the preparation method has great application value in electric power, electrical appliances and electronics industries.

IPC Classes  ?

• C07C 17/35 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules
• B01J 23/02 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the alkali- or alkaline earth metals or beryllium
• B01J 23/58 - Platinum group metals with alkali- or alkaline earth metals or beryllium
• B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
• B01J 35/30 - Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
• B01J 35/61 - Surface area
• B01J 37/00 - Processes, in general, for preparing catalystsProcesses, in general, for activation of catalysts
• B01J 37/02 - Impregnation, coating or precipitation
• B01J 37/08 - Heat treatment

Abstract

Disclosed in the present invention is a dry-type transformer insulation structure optimization method and system. The method comprises: acquiring transformer structure data and, according to the transformer structure data, constructing a two-dimensional axisymmetric finite element model of a winding and a winding equivalent circuit model; according to the winding equivalent circuit model, obtaining maximum electric field information of winding air passages and maximum electric field information of pancake coils; and, according to the maximum electric field information of the winding air passages, the maximum electric field information of the pancake coils and winding data, constructing a parameter optimization model, and solving the parameter optimization model, so as to obtain optimal parameters, so that a worker optimizes a transformer structure according to the optimal parameters, the optimal parameters comprising a high-voltage interwinding air passage width, a low-voltage interwinding air passage width, a high-voltage winding inner-side encapsulation layer thickness, a high-voltage winding pancake coil height and a pancake coil spacing. The insulation structure optimization method can effectively reduce maximum electric fields between air passages and between pancake coils of dry-type transformers under lightning impulses, thus improving the reliability and safety of insulation structures thereof.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]

Abstract

Disclosed are a three-dimensional wildfire monitoring and control system and method for a power transmission corridor. The system includes: a wildfire-induced trip risk assessment module, for assessing, when a wildfire is detected in a power transmission corridor, a wildfire-induced trip risk in real time so as to determine whether to issue a wildfire warning; an online wildfire monitoring device layout planning module, for generating an online wildfire monitoring device layout plan for transmission lines based on the wildfire-induced trip risk, a blind spot of satellite monitoring and importance levels of the transmission lines; and a three-dimensional power transmission corridor wildfire monitoring and warning module, adopting multi-source satellites and drones, and realizing three-dimensional wildfire monitoring of the power transmission corridor by monitoring through online wildfire monitoring devices provided according to the layout plan, the multi-source satellites and the drones.

IPC Classes  ?

• A62C 3/02 - Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
• G01S 17/89 - Lidar systems, specially adapted for specific applications for mapping or imaging
• G06N 7/01 - Probabilistic graphical models, e.g. probabilistic networks
• G06Q 10/20 - Administration of product repair or maintenance
• G06V 20/13 - Satellite images
• G08B 17/00 - Fire alarmsAlarms responsive to explosion

Abstract

Disclosed in the present invention are a gas insulating medium and a use thereof. The gas insulating medium comprises the following components in parts by mass: 8.4-76.7 parts of component 1 trans-1,1,1,4,4,4-hexafluoro-2-butene, and 23.3-91.6 parts of component 2 octafluorocyclobutane. Compared with sulfur hexafluoride, the gas insulating medium in the present invention has more excellent insulating strength, has a low liquefaction temperature, and has a wider temperature application range. Moreover, the gas insulating medium in the present invention is similar in nature to insulating gas of a single substance under certain composition conditions. The proportion of trans-1,1,1,4,4,4-hexafluoro-2-butene and octafluorocyclobutane does not change when the gas leaks. During maintenance of an electrical device, trans-1,1,1,4,4,4-hexafluoro-2-butene and octafluorocyclobutane can be directly supplemented according to a certain proportion, without the need for other operations such as analysis and detection. In addition, the gas insulating medium in the present invention has good environmental protection performance, a low GWP value, and an ODP value of 0.

IPC Classes  ?

• H01B 3/56 - Insulators or insulating bodies characterised by the insulating materialsSelection of materials for their insulating or dielectric properties mainly consisting of organic substances gases

Abstract

Disclosed are a method and device for designing an insulator structure for fixed gas insulation. The present disclosure inputs a plurality of sets of pre-set insulator structure parameters into an initial insulator model separately to generate a plurality of insulator models; evaluates an electrical parameter of each insulator model at a same temperature to obtain an electric field distribution of each part of each insulator model; selects a target insulator model from all the insulator models based on a pre-defined model screening condition and the electric field distribution of each part of each insulator model; evaluates a thermodynamic parameter of the target insulator model based on conductivity-temperature variation curves of an insulation material and an insulation gas to obtain a temperature distribution of each part of the target insulator model; and optimizes the target insulator model based on the temperature distribution to obtain an optimal insulator model.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation

Abstract

Disclosed in the present invention are an insulator structure design method and apparatus for mixed gas insulation. The method in the present invention comprises: respectively inputting several groups of preset insulator structure parameters into an initial insulator model, so as to generate several insulator models; under the same temperature, respectively performing electrical parameter evaluation on each insulator model, so as to obtain electric field distributions of parts of all the insulator models; on the basis of a predefined model screening condition, and according to the electric field distributions of the parts of all the insulator models, selecting a target insulator model from all the insulator models; according to conductivity-temperature change curves of an insulating material and an insulating gas, performing thermodynamic parameter evaluation on the target insulator model, so as to obtain temperature distributions of parts of the target insulator model; and according to the temperature distributions of the parts of the target insulator model, optimizing the target insulator model, so as to obtain an optimal insulator model. Therefore, it can be ensured that an insulator meets the actual engineering requirements under an operating condition in which a mixed gas is used as an insulating medium.

IPC Classes  ?

• G06F 30/10 - Geometric CAD
• G16C 60/00 - Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation

Abstract

Disclosed in the present application are a silicone rubber material performance prediction method and apparatus based on a long short-term memory (LSTM) neural network. Dielectric performance data of a silicone rubber material in a plurality of aging stages are acquired, and fusion processing is performed on the dielectric performance data to obtain a comprehensive performance index sequence of the silicone rubber material; according to the comprehensive performance index sequence, network parameters of the LSTM neural network are optimized by using a discrete differential evolution method until the LSTM neural network reaches a preset convergence condition to obtain a silicone rubber material performance prediction model, thereby effectively avoiding the problems of insufficient fitting degree and low precision caused by selecting key parameters according to experience; and according to a comprehensive performance index initial sequence of a silicone rubber material to be predicted, target comprehensive performance index data of the silicone rubber material to be predicted in each aging stage is predicted by using the silicone rubber material performance prediction model, thereby implementing prediction of aging performance of the silicone rubber material, and providing a detection basis for life prediction of the silicone rubber material in a dry-type transformer.

IPC Classes  ?

• G16C 60/00 - Computational materials science, i.e. ICT specially adapted for investigating the physical or chemical properties of materials or phenomena associated with their design, synthesis, processing, characterisation or utilisation

Abstract

The present invention relates to the technical field of fluorine chemical engineering, and in particular to a preparation method for trans-1,1,1,4,4,4-hexafluoro-2-butene. The preparation method for trans-1,1,1,4,4,4-hexafluoro-2-butene comprises the following steps: preheating trans-2-ethoxy-1,1,1,4,4,4-hexafluoro-2-butene, then mixing same with hydrogen, and reacting under the action of a catalyst to prepare trans-1,1,1,4,4,4-hexafluoro-2-butene, the catalyst being composed of an aluminum-magnesium composite oxide and a group VIII transition metal. Trans-1,1,1,4,4,4-hexafluoro-2-butene prepared by the preparation method of the present invention achieves a selectivity of 99%, and the reaction temperature of this preparation method is moderate, with minimal waste. The prepared trans-1,1,1,4,4,4-hexafluoro-2-butene has significant application value in industries such as power, electrical appliances, and electronics.

IPC Classes  ?

• C07C 17/354 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules by hydrogenation
• C07C 21/18 - Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds containing fluorine
• B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
• B01J 23/58 - Platinum group metals with alkali- or alkaline earth metals or beryllium

Abstract

Disclosed in the present invention are an energy storage type luminous powder-paint coating and a preparation method therefor, relating to the technical field of powder paints. The coating comprises a reflective coating and a luminous coating. A paint for the luminous coating comprises a film-forming substance, a curing agent, a luminous material and a leveling agent. A paint for the reflective coating comprises a film-forming substance, a curing agent, a leveling agent and a pigment and filler; and the gloss of the reflective coating is 95% or below. The luminous material is a rare earth activated alkaline earth metal aluminate luminous material. In the present application, the reflective coating and the luminous coating are arranged, wherein the rare earth activated alkaline earth metal aluminate is used as the luminous material, such that the initial luminous intensity of the coating is increased and the afterglow duration of the coating layer is prolonged, and the diffuse reflection of the reflective coating increases the initial luminous intensity and prolongs the afterglow duration of the whole coating. Compared with a situation without the reflective coating, the initial luminous intensity of the coating of the present application is remarkably improved by more than 10 times, and the afterglow duration is also prolonged by 6 times, thus broadening the application fields.

IPC Classes  ?

• C09D 167/00 - Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chainCoating compositions based on derivatives of such polymers
• C09D 5/22 - Luminous paints
• C09D 5/33 - Radiation-reflecting paints
• C09D 5/03 - Powdery paints

Abstract

Disclosed in the present invention are a binary vapor-liquid equilibrium prediction method and apparatus. The method comprises: decomposing into several groups a gas molecule to be subjected to prediction; calculating a proportion parameter of each group in said gas molecule; according to the proportion parameters, performing calculation to obtain a binary interaction parameter; and establishing a binary phase diagram according to the binary interaction parameter, and predicting a vapor-liquid equilibrium state according to the binary phase diagram. By means of the embodiments of the present invention, groups are obtained by means of decomposing a gas molecule, and a binary interaction parameter is established according to proportion parameters of the groups, thereby avoiding the manpower, material resources and time required by a large number of experiments for establishing the binary interaction parameter, and reducing the calculation amount for vapor-liquid equilibrium analysis. In addition, by means of the binary interaction parameter, vapor-liquid equilibrium can be accurately determined, and prediction is performed by means of analyzing a binary phase diagram, thereby improving the accuracy.

IPC Classes  ?

• G16C 20/30 - Prediction of properties of chemical compounds, compositions or mixtures
• G16C 20/10 - Analysis or design of chemical reactions, syntheses or processes

Abstract

Disclosed in the present application are a molecular collision cross section prediction method and apparatus, a device, and a storage medium. The method comprises: generating a plurality of groups of collision cross section sets on the basis of existing collision cross section data of various gases in a preset database, and calculating electron group parameters of each group of collision cross section sets by using a preset electron group parameter calculation tool, so as to implement the analysis of electron group parameter characteristics by using the existing collision cross section data of the gases; training a preset neural network by using the electronic group parameters until a loss function of the preset neural network reaches a preset convergence condition, so as to obtain a collision cross section prediction model; and predicting target collision cross section data of a target gas by using the collision cross section prediction model. Therefore, an accurate inversion model is established by means of machine learning to speed up the acquisition of complete collision cross section sets of gases and reduce the subjectivity of manual corrections, thereby effectively solving the problem that existing cross section set correction processes are low in efficiency and depend on expertise.

IPC Classes  ?

• G06F 30/25 - Design optimisation, verification or simulation using particle-based methods
• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
• G16C 20/20 - Identification of molecular entities, parts thereof or of chemical compositions

Abstract

Disclosed are a protective coating layer, and a preparation method and use thereof. The present application provides a protective coating layer, including: a rusty-surface liquid layer, a nano-zinc yellow epoxy primer layer, a nano-epoxy micaceous iron oxide (MIO) intermediate coating layer, and a nano-fluorocarbon top coating layer, where the rusty-surface liquid layer is applied on a metal substrate; the nano-zinc yellow epoxy primer layer is applied on a surface of the rusty-surface liquid layer; the nano-epoxy MIO intermediate coating layer is applied on a surface of the nano-zinc yellow epoxy primer layer; and the nano-fluorocarbon top coating layer is applied on a surface of the nano-epoxy MIO intermediate coating layer. The present application effectively solves the technical problem that the existing protective coating layer with nanoparticles exhibits poor adhesion to a substrate and cannot provide a protective effect for a long time.

IPC Classes  ?

• C09D 5/10 - Anti-corrosive paints containing metal dust
• C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects producedFilling pastes
• C09D 7/63 - Additives non-macromolecular organic
• C09D 7/61 - Additives non-macromolecular inorganic
• C09D 7/45 - Anti-settling agents
• C09D 7/20 - Diluents or solvents
• C09D 163/00 - Coating compositions based on epoxy resinsCoating compositions based on derivatives of epoxy resins
• C09D 127/12 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogenCoating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
• B05D 5/06 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
• B05D 7/14 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
• B05D 7/00 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials

Abstract

Disclosed are an abrasion-resistant anti-corrosive coating, and a preparation method and a use thereof. The abrasion-resistant anti-corrosive coating is prepared from a component A and a component B. In the component A, a polyurethane (PU) resin is used as a film-forming material in combination with a corrosion inhibitor, an abrasion-resistant filler, and a body filler. On the basis of the abrasion resistance of the PU resin, the corrosion inhibition of the corrosion inhibitor and the high abrasion resistance of the abrasion-resistant filler improve the abrasion resistance of a coating layer. The use of the body filler reduces a cost of the coating. A thixotropic agent makes the coating have high storage stability. The coating does not include metal components, which avoids an electrochemical potential difference between a coating layer and an alloy, such that the corrosion of the alloy can be effectively controlled.

IPC Classes  ?

• C09D 5/08 - Anti-corrosive paints
• C09D 175/04 - Polyurethanes
• C09D 7/61 - Additives non-macromolecular inorganic
• C09D 7/40 - Additives

Abstract

A three-dimensional power transmission corridor wildfire monitoring and control system and method. The system comprises: a wildfire trip risk assessment module (110), used to assess a wildfire trip risk in real time when a wildfire is monitored in a power transmission line corridor, and thereby determine whether to issue a wildfire warning; a wildfire online monitoring apparatus point distribution planning module (120), used to generate a deployment plan for wildfire online monitoring apparatuses for the power transmission line, according to the wildfire trip risk, a satellite monitoring blind spot, and an importance level of a power transmission line; and a three-dimensional power transmission corridor wildfire monitoring and warning module (130), which uses a multi-source satellite and unmanned aerial vehicle, and is used to implement three-dimensional power transmission corridor wildfire monitoring according to monitoring by the wildfire online monitoring apparatuses installed according to the deployment plan, monitoring by the multi-source satellite, and patrol by the unmanned aerial vehicle. By means of the described system, wildfire warning accuracy for a power transmission corridor can be improved; problems when deploying monitoring apparatuses, such as redundancy in apparatuses and low use efficiency, can be solved.

IPC Classes  ?

• G06Q 10/06 - Resources, workflows, human or project managementEnterprise or organisation planningEnterprise or organisation modelling

Abstract

The present application relates to a collaborative design method for a column leg structure of a tri-post insulator. The method comprises: obtaining a finite element analysis model of a column leg structure of a tri-post insulator to be optimized; inputting a model parameter of the finite element analysis model into a collaborative optimization model to obtain a collaborative optimization factor of the column leg structure of the tri-post insulator to be optimized; establishing a collaborative optimization constraint of the column leg structure of the tri-post insulator; obtaining a data set corresponding to the collaborative optimization constraint, and obtaining an optimal optimization factor according to a finite element model corresponding to the data set; and according to a model parameter corresponding to the optimal optimization factor, adjusting the finite element analysis model of the column leg structure of the tri-post insulator to be optimized. The present invention can improve the stress resistance of a column leg of the tri-post insulator, reduce the risk of stress failure of the column leg of the tri-post insulator, and satisfy actual application requirements.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G06F 111/04 - Constraint-based CAD
• G06F 119/14 - Force analysis or force optimisation, e.g. static or dynamic forces

Abstract

The present application relates to a tri-post insulator curing method. The method comprises: placing a tri-post insulator to be cured into a preheated curing box, heating for a first time period according to a first heating rate, and then pre-curing for a second time period in a first temperature environment; heating the pre-cured tri-post insulator for a third time period according to a second heating rate, and then primarily curing same for a third time period in a second temperature environment; heating the primarily cured tri-post insulator according to a third heating rate for the first time period, then secondarily curing same for a fourth time period in a third temperature environment, and performing linear cooling for the fourth time period after the secondary curing; performing stress measurement on the secondarily cured tri-post insulator, wherein if the measured stress value is less than a standard value, the cured tri-post insulator is conforming. According to the present invention, residual stress generated in the process of curing the tri-post insulator can be reduced, the mechanical strength of the tri-post insulator can be improved, and actual application requirements can be satisfied.

IPC Classes  ?

• H01B 19/00 - Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
• B29C 39/44 - Measuring, controlling or regulating

Abstract

A wear-resistant and anticorrosion coating, a preparation method therefor, and an application thereof. The coating is prepared from a component A and a component B. A polyurethane resin in the component A is used as a material for forming a coating film, which is combined with a corrosion inhibitor, a wear-resistant filler, and a physical filler. The wear resistance of the coating is improved on the basis of the wear resistance of the polyurethane resin and by virtue of the corrosion inhibition of the corrosion inhibitor and the high wear resistance of the wear-resistant filler. The use of the physical filler reduces the costs of the coating, and a thixotropic agent enables the coating to have good storage stability. The component B comprises a curing agent. The coating does not contain metal components.

IPC Classes  ?

• C09D 175/04 - Polyurethanes
• C09D 5/08 - Anti-corrosive paints
• C09D 7/61 - Additives non-macromolecular inorganic

Abstract

A method and an apparatus for predicting an unsafe power distribution behavior, and a server. The method comprises: acquiring video data of a first target when the first target is speaking, and then extracting facial key points and BVP signals from the video data frame by frame (101); extracting a time domain feature and a frequency domain feature of each facial key point to obtain motion signal features, and performing feature extraction on each BVP signal to obtain BVP signal features (102); performing feature fusion on the motion signal features and the BVP signal features of the first target to obtain fused features (103); and inputting the fused features to a preset fully-connected neural network model for processing, and outputting an unsafe behavior score of the first target, the preset fully-connected neural network model being a model of a mapping relationship between the fused features of the motion signal features and the BVP signal features and an unsafe behavior score (104). The present invention solves the technical problem in the prior art that there is no method for predicting unsafe power distribution behaviors of personnel, and thus the occurrence of power accidents cannot be prevented.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06K 9/32 - Aligning or centering of the image pick-up or image-field
• G06K 9/62 - Methods or arrangements for recognition using electronic means
• G06N 3/08 - Learning methods

Abstract

A protective coating, a preparation method therefor, and an application thereof. The protective coating comprises a rusty liquid layer, a nano epoxy zinc chromate primer layer, a nano epoxy micaceous iron oxide intermediate layer, and a nano fluorocarbon top coat layer; the rusty liquid layer is disposed on a metal substrate, the nano epoxy zinc chromate primer layer is disposed on the surface of the rusty liquid layer, the nano epoxy micaceous iron oxide intermediate layer is disposed on the surface of the nano epoxy zinc chromate primer layer, and the nano fluorocarbon top coat layer is disposed on the surface of the nano epoxy micaceous iron oxide intermediate layer. The technical problem that the existing nanoparticle-containing protective coating cannot provide a protective effect for a long time due to poor adhesive force to the substrate is effectively solved.

IPC Classes  ?

• C09D 163/00 - Coating compositions based on epoxy resinsCoating compositions based on derivatives of epoxy resins
• C09D 5/10 - Anti-corrosive paints containing metal dust
• C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects producedFilling pastes
• C09D 127/12 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogenCoating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms

Abstract

Provided is a superconducting fault current limiter having a composite insulating structure. The superconducting fault current limiter includes: a superconducting current limiting unit, an inner composite insulating cylinder, an outer composite insulating cylinder and a low-temperature container. The outer composite insulating cylinder is sleeved inside the low-temperature container; the inner composite insulating cylinder is sleeved inside the outer composite insulating cylinder; the superconducting current limiting unit is sleeved inside the inner composite insulating cylinder. The superconducting current limiting unit and the inner composite insulating cylinder are securely connected through a first support, and the low-temperature container and the outer composite insulating cylinder are securely connected through a second support.

IPC Classes  ?

• H01B 17/60 - Composite insulating bodies
• H01B 17/58 - Tubes, sleeves, beads or bobbins through which the conductor passes

Abstract

An on-line diagnosis method and on-line monitoring apparatus for an internal fault of a sulfur hexafluoride electrical device. The on-line diagnosis method can obtain, in the operation process of a sulfur hexafluoride electrical device, gas component data inside the sulfur hexafluoride electrical device in real time, and determine, by means of gas component data of sulfur oxide (fluorine) gas, whether an internal fault occurs on the sulfur hexafluoride electrical device and the type of the fault. The on-line monitoring device comprises: a first six-way valve (3), a first chromatographic column (6), a second six-way valve (4), a second chromatographic column (7), a third six-way valve (8), a detector (9), a quantitative tube (5), a carrier gas source (1), a gas purifier (2), a compression pump (12), a vacuum pump (11), a gas storage tank (10), a gas distributor (13) and a calibration gas chamber (16), and achieves automatic on-line monitoring and analysis of an insulating gas of the sulfur hexafluoride electrical device, measurement of many components, high sensitivity and stable and reliable performance.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01N 30/02 - Column chromatography
• G01N 30/46 - Flow patterns using more than one column
• G01N 30/60 - Construction of the column

Abstract

A skin layer of a superconducting tape has a woven mesh structure and is disposed on a surface of a superconducting tape. The skin layer of a superconducting tape solves the problem where a vapor layer generated when a superconductor is in a normal resistive state greatly reduces the efficiency of a heat exchange between the superconductor and liquid nitrogen. Further provided are the superconducting tape and a superconducting coil.

IPC Classes  ?

• H01B 12/02 - Superconductive or hyperconductive conductors, cables or transmission lines characterised by their form

Abstract

Provided is a superconducting coil having a spiral structure for a current limiter. The coil includes: a first superconducting tape, a second superconducting tape, and an insulating isolation layer, where the first superconducting tape and the second superconducting tape have spiral structures, an end of the first superconducting tape at a spiral center is connected to an end of the second superconducting tape at the spiral center, the instating isolation laser is filled between the first superconducting tape and the second superconducting tape, and a spacing between the first superconducting tape and the second superconducting tape gradually increases from the spiral center to an outer spiral periphery.

IPC Classes  ?

• H01F 6/06 - Coils, e.g. winding, insulating, terminating or casing arrangements therefor
• H01F 6/00 - Superconducting magnetsSuperconducting coils

Abstract

Provided is a superconducting tape testing device, including lead contacts and a support plate. Each lead contact a conductive contact and a magnet; the magnet is provided with a through hole through which the conductive contact passes, the support plate comprises a plate and a magnetic conductive member; and the magnetic conductive member is fixed on the surface of the plate body.

IPC Classes  ?

• G01R 1/04 - HousingsSupporting membersArrangements of terminals
• G01R 33/12 - Measuring magnetic properties of articles or specimens of solids or fluids

Abstract

A method and apparatus for constructing a multi-source spatial database for a transmission line corridor. The method comprises: constructing, by means of index technology, a spatial data index for transmission line corridor spatial data having the same time phase (101), wherein the transmission line corridor spatial data comprises 2D raster image data, 3D point cloud data, and thematic data; performing registration on transmission line corridor spatial data having different time phases to acquire a registration result (102); and performing data fusion and updating on the basis of the spatial data index and the registration result to acquire a multi-source spatial database for a transmission line corridor (103). An index for various spatial data having the same time phase is constructed, thereby achieving data organization and management and providing a good data basis for data query and analysis. Accurate geometric registration is performed on the spatial data having different time phases, thereby achieving data fusion and dynamic updating on the basis of spatial location. Therefore, the invention provides a multi-source spatial database construction method capable of performing high-precision registration and fusion on complex multi-period multi-source spatial data so as to achieve data linkage management and updating.

IPC Classes  ?

• G06F 16/29 - Geographical information databases
• G06F 16/23 - Updating

Abstract

Disclosed is an arc extinguishing and/or insulated electrical device. In the arc extinguishing and/or insulated electrical device, trans-1,1,1,4,4,4-hexafluoro-2-butene or a mixed gas containing trans-1,1,1,4,4,4-hexafluoro-2-butene is used as a medium- and high-voltage arc extinguishing and/or insulating medium, having good electrical insulation and arc extinguishing properties, being able to improve the insulating capability, and replacing SF6 to be filled in an arc extinguishing and/or insulated electrical device, thereby reducing the impact of SF6 emission on the environment, such that the problem of SF6 emission can be solved; moreover, the temperature range for using the arc extinguishing and/or insulated electrical device can be extended.

IPC Classes  ?

• H02B 13/055 - Features relating to the gas
• H01H 33/22 - Selection of fluids for arc-extinguishing

Abstract

A GNSS antenna, which comprises: a probe, a first antenna substrate, a first microstrip patch, a second antenna substrate and a second microstrip patch. The first microstrip patch, the first antenna substrate, the second microstrip patch and the second antenna substrate are assembled from top to bottom on the probe. The first microstrip patch is mounted onto the first antenna substrate, the first microstrip patch is provided with four first input ports, and the four first input ports are distributed at four vertices in a square shape using the probe as the center. The second microstrip patch is mounted on the second antenna substrate, the second microstrip patch is provided with four second input ports, and the four second input ports are distributed at four vertices in a square shape using the probe as the center. Therefore, the technical problem in which existing GNSS antennas have a relatively low positioning accuracy during combined navigation is solved.

IPC Classes  ?

• H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support

Abstract

A high-altitude operation monitoring device, comprising: a scene simulation unit, a symptom detection unit, and a processing unit, wherein the scene simulation unit is used for providing multiple virtual high-altitude scenes for a high-altitude operation; the symptom detection unit is used for acquiring a physiological signal of an operator, and transmitting the acquired information to the processing unit; the processing unit is used for obtaining the physiological signal transmitted by the symptom detection unit, analyzing and processing the physiological signal, and determining whether the operator has an occupational contraindication. According to the present application, the operator is enabled to enter a simulated high-altitude operation scene, the physiological signal of the operator is acquired in real time, the acquired signal is analyzed, and the operator is monitored whether to have an occupational contraindication of the high-altitude operation, which achieves the effects of discovering the physiological condition of the operator in advance and avoiding the accidence.

IPC Classes  ?

• A61B 5/00 - Measuring for diagnostic purposes Identification of persons

Abstract

A fatigue state identification method, apparatus and device. The method comprises: photographing in real time motions of fatigued personnel to be identified during power grid operations, collecting real-time behavior pictures of the fatigued personnel to be identified, preprocessing the real-time behavior pictures to obtain real-time joint point motion data, inputting the real-time joint point motion data into a preset fatigue state prediction model, and the preset fatigue state prediction model taking the joint point motion data as independent variables and a fatigue state as a dependent variable to output a fatigue state prediction result corresponding to the input joint point motion data to obtain a fatigue state of the fatigued personnel to be identified. The method has a real-time characteristic for identifying the fatigue state of the fatigued personnel to be identified, cannot affect the work efficiency of the fatigued personnel to be identified, and cannot affect normal operation of power operation service of the fatigued personnel to be identified, solving the existing technical problems that a fatigue state identification mode for power grid workers is low in timeliness and low in reliability.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

An emotion recognition method, device and apparatus, wherein a person with emotions to be recognized wears a movement bracelet to perform power grid operations, the movement bracelet can collect real-time movement data of the person with emotions to be recognized, and input the real-time movement data into a preset emotion prediction model, the preset emotion prediction model takes movement data as an independent variable and the emotion state as a dependent variable, outputs an emotion state prediction result corresponding to the input movement data, to obtain the emotion state of the person with emotions to be recognized, the emotion state of the person with emotions to be recognized can be recognized in real time, will not affect the work efficiency of the person with emotions to be recognized, and will not affect the normal power operation of the person with emotions to be recognized, which solves the technical problem of poor timeliness and reliability of existing emotion state recognition methods for power grid workers.

IPC Classes  ?

• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G06Q 50/06 - Energy or water supply
• A61B 5/16 - Devices for psychotechnicsTesting reaction times
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons

Abstract

An Android-based GPS module adaptation method and apparatus, a device, and a storage medium. Said method comprises: receiving a first identification signal generated when a GPS module is powered on; acquiring, according to a preset correlation between identification signals and module identifiers, a first module identifier corresponding to the first identification signal; and determining, according to a preset mapping relationship between the module identifiers and parsing library files, a target parsing library file associated with the first module identifier, and loading the target parsing library file so as to drive the GPS module to operate. Said method provided in the present application acquires an identification signal generated when the GPS module is powered on, and then on the basis of the identification signal, determines and loads a parsing library file associated with the GPS module by means of module identifier matching and parsing library file matching, avoiding the process of manually operating to update software, thereby enabling the updated GPS module to be automatically adapted to a GPS parsing library, and solving the technical problem of tedious upgrading and maintaining work of an existing product equipped with a GPS module.

IPC Classes  ?

• G06F 8/61 - Installation

Abstract

The present invention relates to the technical field of polymer materials, and in particular, relates to a polyurethane polymer and a method for preparing the same and use thereof. The present invention discloses use of aminoimidazolinone-based compound in preparing an end-capped polyurethane polymer product, by which the polyurethane polymer capable of achieving repeated self-healing for multiple times without adding any self-healing agent and any external stimulation can be prepared. The present invention further provides a polyurethane polymer capable of achieving repeated self-healing for multiple times without any external stimulation and having a compressive strength restored to at most 96% of the one before compression, and a method for preparing the same.

IPC Classes  ?

• C08G 18/76 - Polyisocyanates or polyisothiocyanates cyclic aromatic
• C08G 18/12 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
• C08G 18/40 - High-molecular-weight compounds
• C08G 18/42 - Polycondensates having carboxylic or carbonic ester groups in the main chain
• C08G 18/48 - Polyethers
• C08G 18/73 - Polyisocyanates or polyisothiocyanates acyclic
• C08G 18/75 - Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic

Abstract

A superconducting current limiter having a composite insulation structure, comprising: a superconducting current limitation unit (1), an inner composite insulation cylinder (3), an outer composite insulation cylinder (4) and a cryogenic container (2); the cryogenic container having an outer composite insulation cylinder sheathed therein; the outer composite insulation cylinder having an inner composite insulation cylinder sheathed therein; and the inner composite insulation cylinder having a superconducting current limitation unit sheathed therein; wherein, the superconducting current limitation unit and the inner composite insulation cylinder being securely connected to one another via a first support member (34), and the cryogenic container and the outer composite insulation cylinder being securely connected to one another via a second support member (44). The present solution, by means of the cryogenic container being connected to the outer composite insulation cylinder, and the superconducting current limitation unit being connected to the inner composite insulation cylinder: takes gas bubbles generated by the cryogenic container and restricts same between the cryogenic container and the outer composite insulation cylinder; takes gas bubbles generated by the superconducting current limitation unit and restricts same between the superconducting current limitation unit and the inner composite insulation cylinder; and restricts the radial diffusion path of gas bubbles in a liquid nitrogen space, thus preventing the generation of gas bubbles between electrodes and enhancing the insulation effect of a resistive superconducting current limiter.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

A surface layer of a superconducting tape has a mesh grid structure, and is disposed at a surface of a superconducting tape (1). The structure of the present surface layer resolves the technical issue in which a layer of vapor generated on a surface of a superconductor in a normal resistance state significantly reduces the efficiency of heat exchange between the superconductor and liquid nitrogen. Also provided are a superconducting tape (1) and a superconducting coil.

IPC Classes  ?

• H01B 12/08 - Stranded or braided wires

Abstract

A superconducting tape testing device, comprising lead contacts and a support plate. Each lead contact comprises a conductive contact (1) and a magnet (3); the magnet (3) is provided with a through hole through which the conductive contact passes; the support plate comprises a plate body (4) and a magnetic conductive member (5); the magnetic conductive member (5) is fixed on the surface of the plate body (4). According to the provided superconducting tape testing device, the lead contacts are connected to a superconducting tape by means of a magnetic attraction force, the distance between two lead contacts can be adjusted conveniently and quickly, and no damage to the superconducting tap would be caused, thus solving the problem of irreversible damage caused by welding points to the superconducting tape due to a large degree of uncertainty of the measurement of the distance between the welding spots by means of welding, thereby increasing measurement efficiency and precision.

IPC Classes  ?

• G01R 1/04 - HousingsSupporting membersArrangements of terminals

Abstract

nnnnmmnnmnmm(t), and then returning to S2 for iteration.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

The present application discloses a superconducting coil having a spiral structure for a current limiter, the coil comprising: a first superconducting strip, a second superconducting strip, and an insulating isolation layer, wherein the first superconducting strip and the second superconducting strip are spiral structures, an end of the first superconducting strip at a spiral center is connected to an end of the second superconducting strip at the spiral center, the insulating isolation layer is filled between the first superconducting strip and the second superconducting strip, and a spacing between the first superconducting strip and the second superconducting strip gradually increases from the spiral center to an outer spiral periphery. The present application configures a superconducting coil as a spiral structure having a non-uniform spacing on the basis of the principle that the voltage of the superconducting coil gradually increases from the spiral center toward the outer spiral periphery, and provides an insulation spacing gradually increasing from the spiral center toward the outer spiral periphery, thereby solving the technical problem in which an excessive margin is reserved for an inner layer of a superconducting coil of a current limiter while an outer layer thereof has an insufficient margin.

IPC Classes  ?

• H01F 6/00 - Superconducting magnetsSuperconducting coils
• H01F 6/06 - Coils, e.g. winding, insulating, terminating or casing arrangements therefor

Abstract

The present invention relates to the technical field of high-molecular materials, and particularly relates to a polyurethane polymer, a preparation method and application thereof. Disclosed is application of an aminoimidazoline ketone compound in preparing end capping products of the polyurethane polymer. By means of the application of the aminoimidazoline ketone compound, the polyurethane polymer capable of repeated self-heal for multiple times can be prepared without adding any self-healing agent and any external stimulation. Moreover, the present invention further provides a polyurethane polymer and the preparation method therefor. The polyurethane polymer in the present invention can realize repeated self-heal for multiple times without any external stimulation, and the maximum compression strength thereof can be restored to 96% of the strength before compression.

IPC Classes  ?

• C08G 18/76 - Polyisocyanates or polyisothiocyanates cyclic aromatic
• C08G 18/75 - Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
• C08G 18/73 - Polyisocyanates or polyisothiocyanates acyclic
• C08G 18/66 - Compounds of groups , , or
• C08G 18/48 - Polyethers
• C08G 18/42 - Polycondensates having carboxylic or carbonic ester groups in the main chain
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/12 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
• C08G 18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Abstract

Disclosed is an X-ray testing and linear three-dimensional scanning and imaging device for a GIS apparatus. The device comprises: a ray machine (2), an imaging plate (3), an imaging plate connection mechanism (4) and a moving inner frame (5). The ray machine (2) is fixed inside the moving inner frame (5). One end of the imaging plate connection mechanism (4) is connected to the imaging plate (3), and the other end of the imaging plate connection mechanism (4) is fixed on the moving inner frame (5). The ray machine (2) and the imaging plate (3) are connected by a fixing mechanism, so that the ray machine (2) and the imaging plate (3) realise linkage, thereby ensuring a window centre of the ray machine (2) always aligns with a centre of an effective imaging unit of the imaging plate (3), and preventing shaking during the photographing process, and in this process, it is unnecessary to manually re-fix a device for photographing, thereby greatly improving the photographing effect and the testing efficiency, and reducing the labour cost.

IPC Classes  ?

• G01N 23/04 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material

Abstract

Disclosed is a refilling-type online chromatographic detector for sulphur hexafluoride decomposition products. The detector comprises a compressor pump (18), a vacuum pump (17), and a gas storage tank (15), six-way valves (4, 7), chromatographic columns (6, 8), and a detector (9). One end of the compressor pump (18) is connected to one end of the vacuum pump (17); the other end of the vacuum pump (17) is connected to one end of the gas storage tank (15); the other end of the gas storage tank (15) is connected to the first chromatographic column (6) via the first six-way valve (4); the first chromatographic column (6) is connected to the second chromatographic column (8) via the second six-way valve (7); and the second chromatographic column (8) is connected to the detector (9). The refilling-type online chromatographic detector for sulphur hexafluoride decomposition products can detect multiple components, has high detection precision, and can perform automatic sampling, detection and refilling of sampling gas from sulphur hexafluoride electrical equipment, so as to avoid harm to people and the environment caused by gas emission. Moreover, the refilling of gas will not influence the insulation of electrical equipment, so as to increase the frequency and timeliness of online detection for sulphur hexafluoride.

IPC Classes  ?

• G01N 30/88 - Integrated analysis systems specially adapted therefor, not covered by a single one of groups

Abstract

The invention discloses a saturated core type superconducting current limiter and a Dewar. The Dewar comprises: an inner cylinder and an outer cylinder. The side wall of the outer cylinder is provided with a first inner surface and a first outer surface. A first chamber is arranged between the first inner surface and the first outer surface. The inner cylinder is arranged in the first chamber. A second chamber is defined by the first inner surface and used for containing a DC column. The side wall of the inner cylinder is provided with a second inner surface and a second outer surface. A first sub-chamber, a second sub-chamber and a third sub-chamber are sequentially distributed between the second inner surface and the second outer surface in the extension direction of the DC column, the first sub-chamber used for containing a first cooling medium and a first portion, the second sub-chamber used for containing a second cooling medium and a second portion, and the third sub-chamber used for containing a first cooling medium and a third portion. The first cooling medium is different from the second cooling medium. The Dewar can improve the current capacity of the two ends of a superconducting coil to improve the current capacity of the superconducting coil.

IPC Classes  ?

• H01F 6/00 - Superconducting magnetsSuperconducting coils
• H01F 6/04 - Cooling
• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

A method for analyzing causes of an increase in dielectric loss of transformer oil, comprising: a) separately performing quantitative measurement on the contents of phthalate plasticizers in transformer oil of multiple sets of transformers during actual operation by using an established method for quantitative measurement of phthalate plasticizers in transformer oil, to obtain the concentrations of the phthalate plasticizers contained in the transformer oil; and (b) separately measuring the dielectric loss of the transformer oil by preparing a transformer oil sample in which the concentration of a di-n-butyl phthalate is known, and comparing the measurement results with a dielectric loss value of transformer oil containing no plasticizer for analysis to obtain a rule following which the dielectric loss of transformer oil increases with the increase of plasticizer content, thereby further confirming that analyzing the plasticizer content of transformer oil is a method for analyzing causes of an increase in dielectric loss of transformer oil. Therefore, the causes of an increase in dielectric loss of transformer oil can be analyzed by testing the plasticizer content of the transformer oil.

IPC Classes  ?

• G01N 30/02 - Column chromatography

Abstract

A high temperature superconducting hybrid current limiter, comprising a group of high temperature superconducting modules (100), a current on-off valve (200), an elastic connecting device (300), a current limiting circuit (400), and a group of current leading-in terminals (500). The group of high temperature superconducting modules (100) comprises a first high temperature superconducting module (101) and a second high temperature superconducting module (102) which are disposed side by side. One end of the current on-off valve (200) is connected with the first high temperature superconducting module (101), and the other end thereof is connected with the second high temperature superconducting module (102). One end of the elastic connecting device (300) is connected with the first high temperature superconducting module (101), and the other end thereof is connected with the second high temperature superconducting module (102). One end of a first current leading-in terminal (501) of the group of current leading-in terminals (500) is connected with the first high temperature superconducting module (101), and the other end thereof is connected to one end of the current limiting circuit (400). One end of a second current leading-in terminal (502) is connected with the second high temperature superconducting module (102), and the other end thereof is connected with the other end of the current limiting circuit (400). The current limiter can automatically suppress a fault current when the fault current occurs in a power grid, is high in automation degree, flexible in use, simple in structure, and small in size, and can be widely applied.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Abstract

A coupling power fault current limiter, comprising an iron core (100) and a plurality of coils (200). The iron core comprises a plurality of iron core posts (101) which are connected in parallel. The plurality of coils comprises at least one alternating current coil (201) and a direct current coil (202). At least one alternating current coil is wound around each of the plurality of iron core posts. The direct current coil is simultaneously wound around the plurality of iron core posts. Two or more iron core posts wound with the at least one alternating current coil are connected in parallel, and the alternating current coils connected in parallel, as a whole, are connected in series to an alternating current power transmission loop (300). The direct current coil simultaneously wound around the plurality of iron core posts is connected in series to a direct current excitation power supply system (400). The current limiter has a low impedance in a normal running state and a high impedance in a short-circuit fault condition; the switching between high impedance and low impedance can be quick implemented, and the excessive high short-circuit current in a power system is effectively limited.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H01F 37/00 - Fixed inductances not covered by group

Abstract

The present invention provides a high temperature superconducting winding for a saturated iron-core superconducting current limiter, comprising: a plurality of high temperature superconducting winding modules independent of each other, a supporting cylinder, and connecting pieces. Independent direct current power supply modules are adopted to supply power to the high temperature superconducting winding modules. The plurality of high temperature superconducting winding modules independent of each other is installed on the outer surface of the supporting cylinder. The supporting cylinder comprises a cylinder body, an upper end flange and a lower end flange. The upper end flange is used for axially positioning the high temperature superconducting winding modules. The lower end flange is used for being connected with one end of the cylinder body. The upper end flange and the lower end flange are connected by means of the connecting pieces. According to the present invention, the current let-through capability of high temperature superconducting strips in the high temperature superconducting winding modules can be effectively improved, and quench chain reactions caused by weakening of the current let-through capability or a quench of a single high temperature superconducting double pancake coil can be significantly inhibited.

IPC Classes  ?

• H01F 6/00 - Superconducting magnetsSuperconducting coils
• H01F 6/06 - Coils, e.g. winding, insulating, terminating or casing arrangements therefor

Abstract

A method and a device for controlling a local voltage are provided. The method includes: obtaining a first voltage value of a high-voltage side bus in a local transformer substation; determining a control strategy according to a starting threshold value for a voltage enhancement control, a starting threshold value for an under-voltage load shedding and the first voltage value of the high-voltage side bus; and performing the control strategy to control a charging power of an electric vehicle charging station corresponding to the local transformer substation, so as to control the local voltage of the local transformer substation.

IPC Classes  ?

• H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc
• H02J 3/14 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
• B60L 11/18 - using power supplied from primary cells, secondary cells, or fuel cells