Device of Earth Wire Arc Preventing in 500 kV Substation under Strong Induced Electricity Environment

doi:10.3969/j.issn.1008-0198.2023.02.014

Hunan Electric Power ›› 2023, Vol. 43 ›› Issue (2): 85-89.doi: 10.3969/j.issn.1008-0198.2023.02.014

• New technology and Application • Previous Articles Next Articles

Device of Earth Wire Arc Preventing in 500 kV Substation under Strong Induced Electricity Environment

ZHANG Yunxiang¹, WANG Yu¹, SHENG Huan², LI Sipei², CHEN Hao¹, ZHU Kai³, HE Jiahong⁴

1. State Grid Nanjing Power Supply Company, Nanjing 211102,China;
2. Nanjing Electricity Supply Industry General Corp., Nanjing 210019,China;
3. State Grid Anhui Electric Power Company Suzhou Power Supply Company, Suzhou 234399,China;
4. Southeast University,Nanjing 210096,China

Received:2022-10-24 Revised:2022-12-19 Online:2023-04-25 Published:2023-05-06

Abstract

Abstract: The induced voltage of the electrical equipment is too high during the overhaul.When the grounding switch can not be operated, it is necessary to connect the temporary grounding wire. The arc fault will affect the safe operation of the equipment. In this paper an anti-arc device for temporary grounding wire hanging is developed, and a grounding wire switching system based on the current limiting reactor is presented. This system can compensate the instantaneous current, and reduce the overvoltage level. Moreover,when the overvoltage is limited to a reasonable value, the grounding state is switched to direct grounding by control system. The application results show that the device can prevent the grounding arc caused by the induced voltage in the grounding process effectively,has the advantages of convenient installation and high security,and improve the efficiency greatly.

Key words: induced electricity, earth wire, current limiting reactor, arc preventing

CLC Number:

TM862

ZHANG Yunxiang, WANG Yu, SHENG Huan, LI Sipei, CHEN Hao, ZHU Kai, HE Jiahong. Device of Earth Wire Arc Preventing in 500 kV Substation under Strong Induced Electricity Environment[J]. Hunan Electric Power, 2023, 43(2): 85-89.

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Device of Earth Wire Arc Preventing in 500 kV Substation under Strong Induced Electricity Environment

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