FAULT DETECTION APPARATUS AND METHOD FOR HIGH-VOLTAGE DEVICE IN POWER DISTRIBUTION TRANSFORMER AREA

WIPO Patent Application WO/2023/207037

A1

A fault detection apparatus and method for a high-voltage device in a power distribution transformer area. The apparatus comprises a three-phase ceramic capacitive insulator (1), a voltage-dividing capacitor (2), a measurement impedor (3), a change-over switch (4), a signal detection unit (5), and a signal processing unit (6). A built-in capacitor of the three-phase ceramic capacitive insulator (1) and the voltage-dividing capacitor (2) have the same capacitor material, and respectively lead out two terminals, which are used for overvoltage detection and partial discharge detection; and by means of the control of the change-over switch (4) by the signal processing unit (6), automatic conversion between overvoltage detection and partial discharge detection is realized. The present application has both an overvoltage detection mode and a partial discharge detection mode, has high adaptability, does not affect the electrical performance of an original device, is simple to implement, and is suitable for large-scale application.

HUANG JISHENG (CN)
FANG ZHENGYUN (CN)
ZHU QUANCONG (CN)
YANG ZILI (CN)
LIU MINGXIAN (CN)
SHANG JINGRUI (CN)
XIE XUEGANG (CN)
HU FANJUN (CN)

PCT/CN2022/132378

November 02, 2023

November 16, 2022

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

G01R31/12; G01R19/165

WO2021069878A1

2021-04-15

CN108896885A	2018-11-27
CN108427068A	2018-08-21
CN114859188A	2022-08-05
CN206725710U	2017-12-08
JPH1172532A	1999-03-16

CHINABLE IP (CN)

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