500kV电容式电压互感器电压异常分析及处理

Analysis and Treatment of Voltage Abnormality in 500 kV Capacitor Voltage Transformer

介绍电容式电压互感器的工作原理、结构及故障情况,结合CVT介损电容量测试数据、一次电压监测数据、角差比差试验数据,分析某变电站500kV电容式电压互感器电压异常的原因,并提出处理措施和建议。

This paper introduces the working principle,structure and fault of the capacitor voltage transformer（CVT）.According to the CVT capacitance,dielectric loss data,a voltage monitoring data,ratio errors and angular differences of a voltage transformer,analyzes the abnormal voltage fault causes of one 500 kV CVT in some substation,proposes some treatment measures and suggestions.