A property power system can include multiple photovoltaic (PV) panels to generate DC electrical energy from solar energy and a first power conversion module to convert between DC and AC electrical energy and to control aspects of each PV panel. The property power system can have a group of battery blades to store electrical energy and another power conversion module to convert between DC and AC electrical energy and to control aspects of each battery blade. The property power system can have a multiple synchronization interfaces configured to aggregate the AC electrical energy of each of the PV panels/battery blades, respectively, and to control delivery of the aggregated AC electrical energy. The property power system can include a grid circuit disconnector to prevent back-feed of power during grid outage condition while the PV panels or the group of battery blades is powering an electrical load center of the property.
A property power system can include multiple photovoltaic (PV) panels to generate DC electrical energy from solar energy and a first power conversion module to convert between DC and AC electrical energy and to control aspects of each PV panel. The property power system can have a group of battery blades to store electrical energy and another power conversion module to convert between DC and AC electrical energy and to control aspects of each battery blade. The property power system can have a multiple synchronization interfaces configured to aggregate the AC electrical energy of each of the PV panels/battery blades, respectively, and to control delivery of the aggregated AC electrical energy. The property power system can include a grid circuit disconnector to prevent back-feed of power during grid outage condition while the PV panels or the group of battery blades is powering an electrical load center of the property.
H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
G05F 1/67 - Regulating electric power to the maximum power available from a generator, e.g. from solar cell
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H01L 31/042 - PV modules or arrays of single PV cells
3.
Systems and methods for advanced grid integration of distributed generators and energy resources
A circuit for a smart photovoltaic (PV) inverter system and the smart PV inverter system are described. The circuit includes one or more strings coupled to an electrical load. Each of the one or more strings further includes one or more string members coupled in series, where each of the one or more string members comprises a voltage source and an inverter. The circuit also includes a controller to receive an output from an operator controller and control the strings, where the controller is configured to control the strings by providing a function command to a first string member of each of the one or more strings based on the output from the operator controller. The voltage source may also receive an output from an energy output device. Further, the inverter may be configured to convert the output of energy output device into an energy source of electrical load.
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Cox, Robert Williams
Evans, Daniel Wade
Abstract
Various examples are directed to a converter system comprising first and second series-connected converter modules and a synchronization circuit. The synchronization circuit may modulate a reference signal onto a carrier signal to generate a synchronization current signal and the synchronization current signal to an output current of the converter system to generate an aggregated output current. A first converter module may receive the aggregated output current from a first current sensor and generate a first reproduced synchronization signal at least in part from the aggregated output current. A first switch control signal for switching at least one switch at the first converter may be generated based at least in part on the first reproduced synchronization signal.
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
H02M 3/28 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
H02M 7/5383 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
H02M 7/5395 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Bhowmik, Shibashis
Parkhideh, Babak
Abstract
Various examples are directed to electrical converters and systems for operating the same. An electrical converter may comprise a first converter module configured to receive a first direct current (DC) input and provide a first output. The first converter module may comprise a first switch modulated according to a first switch control signal. A second converter module may be configured to receive a second DC input and provide a second output. The second converter module may be connected in series with the first converter module. The second converter module may comprise a second switch modulated according to a second switch control signal. A phase of the first switch control signal may be offset from a phase of the second switch control signal by a first phase offset.
H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
6.
SYSTEMS AND METHODS FOR ADVANCED GRID INTEGRATION OF DISTRIBUTED GENERATORS AND ENERGY RESOURCES
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Bhowmik, Shibashis
Jafarian, Hamidreza
Parkhideh, Babak
Cox, Robert
Abstract
A circuit for a smart photovoltaic (PV) inverter system and the smart PV inverter system are described. The circuit includes one or more strings coupled to an electrical load. Each of the one or more strings further includes one or more string members coupled in series, where each of the one or more string members comprises a voltage source and an inverter. The circuit also includes a controller to receive an output from an operator controller and control the strings, where the controller is configured to control the strings by providing a function command to a first string member of each of the one or more strings based on the output from the operator controller. The voltage source may also receive an output from an energy output device. Further, the inverter may be configured to convert the output of energy output device into an energy source of electrical load.
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Bhowmik, Shibashis
Cox, Robert W.
Parkhideh, Babak
Abstract
A dispatchable photovoltaic (PV) panel product that includes multiple types of voltage sources is described. The product can include a PV panel that includes PV cells, a battery, and a panel level panel mounted inverter coupled to the PV panel and the battery. Each of the battery and the PV panel are to generate direct current (DC) power. The panel level inverter is to convert the DC power into alternating current (AC) power and discharge the AC power to an electrical load. The panel level inverter can include a voltage source interface converter (VSIC) for charging or discharging the battery using a charge/discharge profile for the battery. The panel level inverter can also include a voltage source monitoring/protection system to (i) protect the battery from damage; and (ii) monitor at least one of a condition of the battery or a condition of the PV panel.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
8.
SYSTEMS AND METHODS FOR DISPATCHING MAXIMUM AVAILABLE CAPACITY FOR PHOTOVOLTAIC POWER PLANTS
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Bhowmik, Shibashis
Cox, Robert W.
Parkhideh, Babak
Abstract
Systems, apparatuses, and methods for dispatching maximum available capacity for photovoltaic (PV) power plants are described. For an embodiment, a PV panel assembly comprises a first PV panel configured to generate direct current (DC) power and an inverter molecule coupled to the first PV panel. The inverter molecule is configured to convert the DC power generated by the first PV panel into alternating current (AC) power. Moreover, the inverter molecule includes a monitoring device configured to monitor a condition of the first PV panel. The monitored condition of the first PV panel is converted into electronic data for generating or creating a first adaptive PV panel model for the first PV panel. Information derived from the first adaptive PV panel model can be communicated to a third party, such as an electric utility company or an Independent System Operator (ISO).
G06F 19/00 - Digital computing or data processing equipment or methods, specially adapted for specific applications (specially adapted for specific functions G06F 17/00;data processing systems or methods specially adapted for administrative, commercial, financial, managerial, supervisory or forecasting purposes G06Q;healthcare informatics G16H)
9.
System and method for islanding detection and prevention in distributed generation
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Bhowmik, Shibashis
Mazhari, Iman
Parkhideh, Babak
Abstract
Various examples are directed to systems and methods for detecting an islanding condition at an inverter configured to couple a distributed generation system to an electrical grid network. A controller may determine a command frequency and a command frequency variation. The controller may determine that the command frequency variation indicates a potential islanding condition and send to the inverter an instruction to disconnect the distributed generation system from the electrical grid network. When the distributed generation system is disconnected from the electrical grid network, the controller may determine whether the grid network is valid.
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (USA)
Inventor
Bhowmik, Shibashis
Mazhari, Iman
Parkhideh, Babak
Abstract
A method for detecting and preventing islanding includes issuing a command to an inverter connected to a power source, where the inverter is coupled to a power grid and supplies power to the power grid, the command causes a frequency of a waveform output by the inverter to vary, and the frequency of the waveform output by the inverter is a command frequency, determining that a amount of change of the command frequency is a constant value for a predetermined amount of time, removing the power supplied by the inverter from the power grid, and determining whether the power grid is valid.
A circuit for an energy collection system is provided that includes one or more strings that are configured to couple to an electrical load. Each of the one or more strings comprises one or more string members that are coupled to each other in series. Each of the one or more string members comprises (i) a connection to receive an output from an energy output device, and (ii) an inverter configured to convert the output of the energy output device into alternating current (AC) energy. The circuit includes a controller that controls the output that is provided by the one or more strings by controlling the individual string member.
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
H02M 7/44 - Conversion of DC power input into AC power output without possibility of reversal by static converters
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
H02J 3/40 - Synchronising a generator for connection to a network or to another generator
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
12.
SYSTEMS AND METHODS FOR SOLAR PHOTOVOLTAIC ENERGY COLLECTION AND CONVERSION
A circuit for an energy collection system is provided that includes one or more strings that are configured to couple to an electrical load. Each of the one or more strings comprises one or more string members that are coupled to each other in series. Each of the one or more string members comprises (i) a connection to receive an output from an energy output device, and (ii) an inverter configured to convert the output of the energy output device into alternating current (AC) energy. The circuit includes a controller that controls the output that is provided by the one or more strings by controlling the individual string member.
A circuit for an energy collection system is provided that includes one or more strings that are configured to couple to an electrical load. Each of the one or more strings comprises one or more string members that are coupled to each other in series. Each of the one or more string members comprises (i) a connection to receive an output from an energy output device, and (ii) an inverter configured to convert the output of the energy output device into alternating current (AC) energy. The circuit includes a controller that controls the output that is provided by the one or more strings by controlling the individual string member.
patents
