Maximized power in a photovoltaic distributed power system
AssigneeSolaredge Technologies Ltd.
InventorsIlan Yoscovich, Ofir Bieber, Tzachi Glovinsky
Life of this patent
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Abstract
A power harvesting system including multiple parallel-connected photovoltaic strings, each photovoltaic string includes a series-connection of photovoltaic panels. Multiple voltage-compensation circuits may be connected in series respectively with the photovoltaic strings. The voltage-compensation circuits may be configured to provide respective compensation voltages to the photovoltaic strings to maximize power harvested from the photovoltaic strings. The voltage-compensation circuits may be include respective inputs which may be connected to a source of power and respective outputs which may be connected in series with the photovoltaic strings.
Claims20
A method comprising:
- coupling inputs of a power converter across a string of photovoltaic modules;
- directly connecting a first input of the inputs of the power converter to an output of the power converter via a direct bypass link;
- and
- dividing a current output by the string of photovoltaic modules into:
- a first current that flows from the first input of the power converter to the output of the power converter via the power converter, and
- a second current that flows directly from the first input of the power converter to the output of the power converter via the direct bypass link,
- wherein the second current is greater than the first current.
A system comprising:
- a plurality of parallel-connected photovoltaic strings, a first photovoltaic string of the plurality of parallel-connected photovoltaic strings comprising:
- a series-connection of photovoltaic cells;
- and
- a voltage-compensation circuit comprising output terminals and input terminals, the output terminals connected in series with the series-connection of photovoltaic cells, and the input terminals connected across the first photovoltaic string, wherein the voltage-compensation circuit is configured to output an adjustable compensation voltage, and wherein a first current from the first photovoltaic string flows from a first input terminal of the of the voltage-compensation circuit to a first output terminal of the of the voltage-compensation circuit via the voltage-compensation circuit;
- and
- a direct bypass link directly connecting the first input terminal of the voltage-compensation circuit and the first output terminal of the voltage-compensation circuit, wherein a second current from the first photovoltaic string flows from the first input terminal of the voltage-compensation circuit to the first output terminal of the voltage-compensation circuit via the direct bypass link, the second current greater than the first current.
A system comprising:
- a photovoltaic string comprising:
- a series-connection of photovoltaic cells;
- a power device comprising output terminals and input terminals and configured to regulate a voltage drawn from the photovoltaic string, the output terminals connected to the series-connection of photovoltaic cells, and the input terminals connected across the photovoltaic string, wherein the power device is configured to direct a first current flow from a first input terminal of the input terminals to a first output terminal of the output terminals via the power device;
- and
- a direct bypass link directly connecting the first input terminal and the first output terminal, wherein the power device is configured to direct a second current flow from the first input terminal to the first output terminal via the direct bypass link, the second current flow being greater than the first current flow.
Dependencies are inferred from the claim text.