SF₆ decomposition and fault type in SF₆ gas insulated equipment

authored by

X. Zhang, Ernst Gockenbach, C. Y. Wang, G. Song, X. L. Yan, Y. S. Ji, R. Yang, Z. X. Su, Q. Yao, H. L. Chen, G. Lu

Abstract

In the presence of arc, partial discharge and thermal discharge, SF ₆ decomposes into a wide variety of active products which possess different chemical properties. This paper reports on research in SF₆ decomposition relating to the ageing- and fault problems of the insulating materials in the gas-insulated equipment. Under the guidance of detection technology, the decomposition mechanism and the decomposed constituent of SF₆ are analysed. The qualitative and quantitative determinations of the by-products are studied according to various modes of electrical discharges. In particular, the influence of discharge energies and impurities on the formation of the dominant stable by-products is discussed. According to the characteristic products, the internal fault inside gas insulated switchgear can be determined for fault diagnosis of SF₆ equipment.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

External Organisation(s)

China Electric Power Research Institute
Shannxi Electric Power Research Institute
State Grid Anhui Electric Power Co
State Grid Chongqing Power Company
Heilongjiang Electric Power Research Institute

Type

Conference contribution

Pages

514-517

No. of pages

4

Publication date

26.11.2012

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electrical and Electronic Engineering

Electronic version(s)

https://doi.org/10.1109/ICHVE.2012.6357039 (Access: Closed)