Analysis of Abnormal Nitrogen Leakage in 500KV Circuit Breaker

Hui Liang, Haolin Huang, Wang Lu, Pengda Shao, Zhengwei Feng, Jianqiang Zhan, Guangze Zhu, Tengfei Chang and Shengqun Zhu

GBP Proceedings Series, 2025, vol. 7, 65-71

Abstract: High-voltage switches are widely used in 500kV substations, where nitrogen leaks are a common occurrence during operation. This paper provides a detailed analysis of the abnormal nitrogen leak incident involving the No.5041 switch of the No.3 main transformer at the 500kV Danxi Substation. By examining the monitoring backend signals, inspecting on-site equipment, and studying the relay circuits, the cause of the anomaly was identified, and effective solutions were proposed. The analysis revealed that the anomaly was caused by a fault in the K15 relay, not a genuine nitrogen leak. The paper summarizes the handling process and the issues exposed, providing a reference for the analysis and handling of similar anomalies.

Keywords: 500kV substation; main transformer switch; nitrogen leakage; relay fault (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:axf:gbppsa:v:7:y:2025:i::p:65-71

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