摘要
简述了一起500 kV电容式电压互感器(CVT)电容分压器元件击穿导致二次电压偏低故障发生的过程,结合CVT结构和工作原理对其进行了分析,并对电容器进行解剖,发现电容分压器元件被击穿,从而电容升高、二次输出电压降低。通过对CVT的现场更换,消除故障,电压信号显示正常。
In this paper,the breakdown of capacitance voltage divider element causing fault due to low secondary voltage in a 500 kV capacitor voltage transformer（CVT）is introduced.The fault is analyzed based on the structure and operation principle of CVT.The capacitor is disassembled,found the capacitance voltage divider component breakdown,the capacitance is increased and the secondary output voltage decreased.Through the replacement of CVT at site,the fault is eliminated and normal voltage signal is indicated.
出处
《电力电容器与无功补偿》
2011年第6期74-76,79,共4页
Power Capacitor & Reactive Power Compensation
关键词
电容式电压互感器(CVT)
二次电压
电容分压器元件
击穿
capacitor voltage transformer（CVT）
secondary voltage
capacitance voltage divider component
breakdown
