750kV罐式断路器内部接地故障保护动作行为分析

摘要

针对一起750 kV罐式断路器内部接地故障,通过对保护动作数据和波形图进行综合分析,快速、准确地找出故障点并排除了故障。分析结果表明：故障原因为拉杆绝缘材料存在质量问题,在稳态电压下内部放电,致使其绝缘击穿。%Aiming at an inside grounding fault of 750 kV tank breaker,analyzes the action data and waveshape chart of protection device,finds out fault spot and eliminates the fault.The result shows that the cause of fault is the insulated material of pull-stick existing quality problem,inside discharges under the steady state voltage,brings about its insulated element breakdown.