CPC H02S 50/10 (2014.12) [H02J 3/001 (2020.01); H02S 40/32 (2014.12)] | 15 Claims |
1. A fault detection apparatus, comprising
a temperature detection unit;
a current detection unit; and
a controller,
wherein the temperature detection unit is coupled to a plurality of filter capacitors between an output end of a grid-tied inverter and a grid, and is configured to detect temperatures of the plurality of filter capacitors, and output the temperatures to the controller;
wherein the current detection unit is coupled to the plurality of filter capacitors, and is configured to detect currents of the plurality of filter capacitors, and output the currents to the controller; and
wherein the controller is separately connected to the temperature detection unit and the current detection unit, and is configured to:
determine whether the received temperature has exceeded a first threshold and whether the received current has exceeded a second threshold, and determine whether the first threshold and second threshold are met simultaneously;
in a case where only one of the first threshold and second threshold is met, maintain a connection between the output end of the grid-tied inverter and the plurality of filter capacitors; and
in a case where the first threshold and second threshold are met simultaneously, disconnect the output end of the grid-tied inverter from the plurality of filter capacitors.
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