摘要
通过对电流互感器(TA)暂态特性的分析,对保护用TA暂态面积系数K_(td)的计算、标准、计算K_(td)应采用瞬时值还是最大值、误差计算等问题进行了探讨。同时,对保护用TA在工程选择中,保护校验故障电流和流过TA的短路电流的时间t的选择原则进行了阐述。
Through the analysis of transient characteristics of current transformer （TA）, the problems of protection TA were discussed, such as calculation and standards of the TA transient area index Ktd, instantaneous value or maximum value calculation of Ktd, error calculation and other issues. Meanwhile, in the engineering selection of protection TA, the selection principles of fault current for protection checking and the time of short - circuit current through TA were described.
出处
《电力设备》
2007年第9期30-34,共5页
Electrical Equipment
关键词
电流互感器
暂态饱和
暂态面积系数
继电保护
误差
current transformer
transient saturation
transient dimension factor
protection
transient error
