高压电器2017，Vol.53Issue(5)：181-187,7.DOI:10.13296/j.1001-1609.hva.2017.05.029
500kV交流滤波器用断路器灭弧室爆炸故障分析与防范措施
Research and Protecting Measures on Explosive Accident of Circuit Breaker Arc-extinguishing Chamber Used in 500 kV AC Filter
摘要
Abstract
In order to solve to the explosive accident of 500 kV AC filter circuit breaker,different methods such as on-site inspection,disintegration in the factory,detection of the key components,overvoltage simulation,sampling inspection are made on the fault circuit breaker in this paper.Insulation experiments of circuit breaker are carried out on the near phase with AC and DC withstand voltage tests at a high altitude.The near phase is same to the falut circuit breaker in the converter station.The results show that the explosion reasons of the circuit breaker arc-extinguishing chamber are the low insulation margin of the circuit breaker and the poor material of the arcing contact.The metal dust and the metal impurities lead to the distortion of the electric field distribution in the circuit breaker arc-extinguishing chamber.The metal dust is produced during the operation of circuit breaker and the metal impurities come from the assembly process of circuit breaker.Finally,the internal insulation breakdown has been occurred in the circuit breaker arc-extinguishing chamber.According to the special operation conditions for the 500 kV AC filter circuit breaker and the explosion reasons of the arc-extinguishing chamber,some protecting measures are put forward.关键词
交流滤波器/断路器/爆炸故障/交直流叠加耐压试验/原因分析/防范措施Key words
AC filter/circuit breaker/explosive accident/superposition withstand voltage test of AC and DC/cause analysis/protecting measures引用本文复制引用
黎卫国,张长虹,夏谷林,陈伟民,楚金伟,周海滨..500kV交流滤波器用断路器灭弧室爆炸故障分析与防范措施[J].高压电器,2017,53(5):181-187,7.基金项目
南方电网重大科技专项资金项目(WY-KJXM-20150902).Project Supported by Fundamental Research Funds for the China Southern Power Grid (WY-KJXM-20150902). （WY-KJXM-20150902）
