宽频高精度局部放电传感器的设计  

DESIGN OF HIGH FREQUENCY PARTIAL DISCHARGE CURRENT TRANSFORMER WITH HIGH ACCURACY

作　　者：刘晓鸥[1] 黄成军[1] 钱勇[1] 徐冰雁[2] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海市电力公司,上海200122

出　　处：《微计算机信息》2007年第28期110-112,共3页Control & Automation

摘　　要：在电力系统的局部放电在线监测中,电流互感器被用于获取标志局部放电情况的高频小电流。文中介绍了一种基于罗科夫斯基线圈的高频电流传感器的设计,通过对系统的高频等效电路进行误差分析,给出了一种基于运算放大器的误差补偿电路,实验结果证明,这个误差补偿电路对于降低传感器的误差和拓宽频带有非常显著的作用,使传感器的性能达到更高的水准。During partial discharge on-line monitoring for power transformer systems, current transformers are used in capturing small current on high frequency. In this contribution, a design of high frequency current transformer based on Rogowski coil will be introduced, and after analyzing the error in high frequency circuit model, an error-compensating method will be given, which was proved to be very effective in reducing the error level and widening the -3dB bandwidth of current transformers.

关 键 词：局部放电 罗科夫斯基线圈 电流互感器 误差补偿 高频模型 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]