DISTRIBUTED FAULT DETECTION METHOD FOR POWER DISTRIBUTION SYSTEM HAVING RESONANT GROUNDING

WIPO Patent Application WO/2020/192156

A1

Disclosed is a distributed fault detection method for a power distribution system having resonant grounding, which belongs to the technical field of electric power automation. The invention comprises: detecting a fault according to a shift in neutral-to-earth voltage; using pre-fault and post-fault voltages (relatively) to identify a fault phase; and identifying a faulty feeder (and a fault region of a long feeder) according to the relationship between an initial transient of a zero-sequence current and a fault phase voltage after the occurrence of the fault. The invention uses voltage signals and current signals from corresponding voltage transformers and current transformers, such that protection devices in the same or different feeders do not need to communicate with each other to identify a faulty feeder.

CHEN LI (CN)
YING QIANG (CN)
ZHOU SHAOLIANG (CN)
SHEN JIAN (CN)
ZHANG MIN (CN)
TANG KAI (CN)
LIU HUI (CN)
SUN JIANPING (CN)
ZHANG QIONG (CN)
SHEN YULONG (CN)
TANG YIXIN (CN)
YIN YAO (CN)
CAI KESU (CN)

PCT/CN2019/120481

October 01, 2020

November 25, 2019

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NARI TECHNOLOGY CO LTD (CN)
NARI NANJING CONTROL SYSTEM CO LTD (CN)

G01R31/08; G01R19/165

CN110031716A	2019-07-19
CN101295873A	2008-10-29
CN107966633A	2018-04-27
CN101452038A	2009-06-10
CN107526005A	2017-12-29

NANJING ZONGHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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