摘要
我国110kV及以上电压等级电网基本上实现了微机保护和电子式电能表。调查表明电压互感器的实际二次负荷不到铭牌标注额定负荷容量的十分之一,有的甚至低于百分之一。本文论述了变电站电压互感器二次负荷的实际需求范围;分析了偏大的二次负荷参数选择对电容式电压互感器(CVT)产生的各种负面作用,并对CVT运行状态下的误差特性进行了评估。
Power grid of 1 lOkV and higher voltage class has basically realized the microcomputer protection and the electrical energy measurement devices. The investigation indicated the practical secondary burden of voltage transformer was less than one tenth of rated secondary burden, and even lower than one hundredth. The paper discussed practical requirement scope on secondary burden of voltage transformer, analyzed too big parameters of secondary burden caused various negative function to capacitor voltage transformer（CVT）, and evaluated the error performance of CVT in operation conditions.
出处
《电测与仪表》
北大核心
2010年第5期39-42,共4页
Electrical Measurement & Instrumentation
关键词
电容式电压互感器
二次负荷
电气特性
误差
铁磁谐振
CVT, secondary burden, electrical characteristics, error performance, ferro-resonance
