电压互感器宽频传递特性的时域测量方法  

Time-domain measuring method for wide-frequency transfer characteristic ofpotential transformer

作　　者：吴茂林[1] 崔翔[1] 张卫东[1] 

机构地区：[1]华北电力大学电力工程系,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2004年第1期25-28,共4页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50077006);教育部高等学校优秀青年教师奖励基金计划;骨干教师资助计划资助.

摘　　要：变电站一次回路开关操作会在高压母线上产生快速瞬态过电压,该过电压会通过电压互感器(PT)或电容式电压互感器(CVT)耦合到二次回路中,从而在二次回路中产生干扰电压。为了预测这个干扰电压,必须获得PT或CVT的宽频传递特性。介绍了一种可测量PT或CVT电压宽频传递特性的时域测量方法,该方法利用sinc信号作为电压源。实测结果表明该方法是有效的。In substation, the switching operation in the primary circuit will cause the fast transient overvoltage. The fast transient overvoltage can be coupled into the secondary circuit via the potential transformer(PT)or the capacitor voltage transformer(CVT), therefore the interference voltage will be caused in the secondary circuit For the prediction of the interference voltage in the secondary circuit, the wide-frequency transfer characteristic of the PT or CVT must be obtained. The paper presents a time-domain measuring method that can measure the transfer characteristic of the PT or CVT. In the method the sinc signal is the voltage source that will act on the PT or CVT. The measurement result proves that the method is effective.

关 键 词：电压互感器 宽频传递特性 时域测量 二次回路 变电站 

分 类 号：TM451[电气工程—电器] TM63