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PROTECTION SYSTEM AND METHOD FOR PHOTOVOLTAIC GRID-CONNECTED INVERTER
PROTECTION SYSTEM AND METHOD FOR PHOTOVOLTAIC GRID-CONNECTED INVERTER
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机译：光伏并网逆变器的保护系统和方法
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摘要
Provided is a protection system for a photovoltaic grid-connected inverter, comprising a detection device (200), a photovoltaic panel (PV), an inverter (100), a transformer (T) and an inverter controller (300), wherein an output end of the photovoltaic panel (PV) is connected to an input end of the inverter (100), and the inverter (100) inverts a direct current output by the photovoltaic panel (PV) into an alternating current and transmits same to the transformer (T); a secondary winding of the transformer (T) is connected to an output end of the inverter (100), and a primary winding of the transformer (T) is connected to a grid; the detection device (200) is connected between the primary winding of the transformer (T) and the grid, and is used for detecting whether a single-phase open-circuit fault occurs at the side of the primary winding of the transformer (T); and sending a fault signal to the inverter controller (300) when it is detected that a single-phase open-circuit fault occurs at the side of the primary winding of the transformer (T); and the inverter controller (300) is used for controlling the shut-down of the inverter (100) according to the fault signal. Also provided is a protection method for a photovoltaic grid-connected inverter.
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