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AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsXin Qi, Zhiwu Xu, Xiufeng Zhang
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A photovoltaic system includes an active protection switch, a direct current-direct current conversion circuit, and a controller. The active protection switch is configured to connect to a photovoltaic module, and the direct current-direct current conversion circuit. The direct current-direct current conversion circuit is configured to connect to a load. The controller is configured to: when a reverse current of a photovoltaic unit is greater than or equal to a current threshold, deliver, to the active protection switch based on an input voltage of the direct current-direct current conversion circuit, a breaking instruction used to trigger the active protection switch to be turned off; and when the active protection switch is not effectively turned off within preset duration after the breaking instruction is delivered to the active protection switch, regulate the input voltage of the direct current-direct current conversion circuit to be less than or equal to a first voltage threshold.
A photovoltaic system comprising:
A circuit protection method for a photovoltaic system, wherein the photovoltaic system comprises an active protection switch, a direct current-direct current conversion circuit, and a controller, a first end of the active protection switch is configured to connect to a photovoltaic module, a second end is connected to an input of the direct current-direct current conversion circuit, an output of the direct current-direct current conversion circuit is configured to connect to a load, and the circuit protection method comprises:
Dependencies are inferred from the claim text.