摘要
对500 k V叙府变电站两例500 k V线路电容式电压互感器(CVT)的电容量及介损异常增长原因进行分析,分析得出CVT内部元件击穿导致电容量及介损异常增长。通过返厂对故障CVT进行试验及解体检查,证明了由于原材料及制造工艺水平导致了CVT内部电容元件击穿。最后对500 k V CVT出厂试验、例行试验及日常运维监视进行了探讨。
The causes for the abnormal growth in capacitance and dielectric loss of capacitor voltage transformer （ CVT） in two 500 kV transmission lines at 500 kV Xufu substation are analyzed , and the analysis shows that the abnormal growth in capaci-tance and dielectric loss are due to the breakdown of internal components in CVT .Through the testing and disassembling in-spection on the fault CVT which is returned to the factory , it is proved that the breakdown of internal capacitance components in CVT is caused by raw materials and manufacturing process .Finally, the routine test,daily operation and monitoring for 500 kV CTV are discussed .
出处
《四川电力技术》
2014年第5期32-35,共4页
Sichuan Electric Power Technology
关键词
电容式电压互感器(CVT)
介损
电容量
击穿
capacitor voltage transformer （CVT）
dielectric loss
capacitance
breakdown
