Single-phase earth fault sensitive sensing method and system and storage medium

• Main Authors: YANG XI, YU KUN, ZENG XIANGJUN, ZENG HAIYAN, LI HANG, HE SHIGENG, LI LI, ZHANG ZHONGYU, CHEN SHUANG
• Format: Patent
• Language: Chinese; English
• Published: 24.03.2023
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a single-phase earth fault sensitive sensing method and system and a storage medium. The method comprises the following steps: measuring and acquiring zero-sequence voltage of a power distribution network and zero-sequence current of each feeder line in real time; calculating each feeder power and each feeder power factor angle according to the feeder power expression; whether a grounding fault occurs in the power distribution network is judged according to the difference between the feeder power factor angle and the feeder power factor angle when the feeder and the bus are normal and faulty, and whether the bus is faulty or the feeder is faulty is accurately distinguished. According to the feeder line power factor angle characteristics, sensitive sensing of the single-phase earth fault can be realized, the bus and feeder line faults can be accurately distinguished, and the method has relatively high anti-transition resistance capability and engineering application value. 本申请涉及一种单相接地故