1100kV气体绝缘金属封闭开关设备绝缘内部气隙放电缺陷诊断分析与处理

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Abstract In this paper, a partial discharge defect of 1100kV GIS in UHV station is analyzed. The defect is found by UHF partial discharge on-line monitoring device. UHF method and ultrasonic method are synthetically used in site, and the defect is preliminarily analyzed and positioned in combination with the internal structure of the equipment. In the process of dismantling and repairing the equipment when it returns to the factory, combined with pulse partial discharge test and 3-D CT tomography technology, the defective equipment is analyzed and diagnosed in the factory. It is pointed out that the air gap in the insulating support barrel is the fundamental cause of the abnormal partial discharge. Based on the case analysis of the abnormal partial discharge, the precautions, prevention and treatment measures for the production, quality inspection and operation of the insulating parts of GIS equipment are put forward.

Key words： UHV GIS insulated support tube air gap discharge diagnosis

Received: 28 April 2019 Published: 19 December 2019

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	Articles by authors
	Chen Hongyang
	Zhao Ke
	Dong Zhengjie
	Pei Wenlong

Cite this article:

Chen Hongyang,Zhao Ke,Dong Zhengjie等. Diagnosis and treatment of air gap discharge defects in insulation of 1100kV GIS equipment[J]. Electrical Engineering, 2019, 20(12): 102-107.

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http://dqjs.cesmedia.cn/EN/Y2019/V20/I12/102

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