SPLIT-PHASE SWITCH-BASED FAULT SEARCH SYSTEM AND METHOD

WIPO Patent Application WO/2023/221428

A1

A split-phase switch (2)-based fault search system. After a power distribution network breaks down, a power supply is required for fault detection. Thus, using a split-phase switch (2) in the power distribution network provides the power supply for fault detection, solving the problem that, after a fault occurs, an external power supply is required for judgment detection and fault location. After the fault occurs, an A phase, B phase and C phase switch of the split-phase switch (2) are separately and successively turned on, and the fault is located by means of a pulse signal being generated in a fault phase and a pulse signal being not generated in a non-fault phase. A ground fault is determined according to a zero-sequence voltage change, as a fault point has the highest three-phase resultant zero-sequence voltage. When multiple faults occur in a line, fault point positions and the types of fault points can be determined, and fault point position information and fault point type information are sent to a fault detection apparatus (3) at the same time, aiding a detection worker in more quickly and accurately determining the positions and types of the fault points.

LIU HONGWEN (CN)
CHEN XIAO (CN)
YANG JINDONG (CN)
YANG WENCHENG (CN)
HUANG JISHENG (CN)
LUO ZHENGYA (CN)
ZHANG HAITAO (CN)
LI XUEFENG (CN)

PCT/CN2022/131942

November 23, 2023

November 15, 2022

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LINCANG POWER SUPPLY BUREAU YUNNAN POWER GRID CO LTD (CN)

G01R31/08; G01R31/52

CN114859177A	2022-08-05
CN202309048U	2012-07-04
CN1430318A	2003-07-16
CN107966633A	2018-04-27
CN112014768A	2020-12-01
JP2001196980A	2001-07-19

CHINABLE IP (CN)

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