CPC G01R 31/086 (2013.01) [G01R 31/088 (2013.01)] | 8 Claims |
1. A fault diagnosis method for a three-phase power grid, comprising:
acquiring line voltage values of the three-phase power grid, wherein the line voltage values are collected and sent in real time by a voltage collector connected to a phase line of the three-phase power grid;
obtaining a voltage peak balance degree and a phase angle offset of the three-phase power grid based on the line voltage values and a preset system parameter; and
obtaining a fault diagnosis result based on the voltage peak balance degree and the phase angle offset;
wherein said obtaining a voltage peak balance degree and a phase angle offset of the three-phase power grid based on the line voltage values and a preset system parameter comprises:
performing filtering analysis based on the line voltage values and the preset system parameter to obtain a filtered output line voltage value; and
obtaining a voltage peak balance degree and a phase angle offset of the three-phase power grid based on the filtered output line voltage value.
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