Failure Analysis of 500kV Gapless MOA. (October 2020)

• Record Type: Journal Article
• Authors: Yang, Shaoyuan; Yang, Xuefei; Wang, Rongchao; Wu, Chunhong
• Is Part Of: Journal of physics. Volume 1639(2020)
• Publication Date: 2020-10
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1639/1/012050
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: This paper analyzes the cause of a 500kV gapless MOA fault in a substation. The appearance inspection and disassembly analysis of the arrester are carried out. Combined with the protection action, the fault cause of the arrester is analyzed. It is found that the fault is caused by the side flashover failure of the local resistor piece of the line arrester due to the steepness of the lightning invasion wave is large. When the line is reclosed, the lower section bears the over-voltage, resulting in the damage of some resistors, and then causes the pressure release. Based on the analysis the paper puts forward some corresponding operation and maintenance measures.