自励源电子式电流互感器研发中的关键技术  

The Key Technology of ECT with Self-excitation Power Supply

作　　者：刘忠战 莫卫东[2] 

机构地区：[1]西安华伟光电技术有限公司,陕西省西安市710118 [2]空军工程大学理学院,陕西省西安市710051

出　　处：《电力系统自动化》2009年第6期67-69,89,共4页Automation of Electric Power Systems

基　　金：科技部科技型中小企业技术创新基金资助项目(06C26216100557)~~

摘　　要：简要分析了向有源电子式电流互感器高压侧信号采样变送电路提供电源的困难,根据电磁场储能原理,采用微晶磁性材料作为环形磁导体以及特殊的限流组件,解决了磁场取能作为自励源供电的技术难题,使之满足唤醒电流、唤醒时间和饱和大电流这3项重要指标要求。This paper analysis the difficulties to provide a stable DC power supply to sampling and transmitting circuit in the high-voltage side of ECT. According to the storage principle of electromagnetic energy, the technical problems to take energy from magnetic field with self-excitation power supply has been resolved with a ring magnets jacket made by microcrystalline magnetic materials and a special ＂restricting current funnel＂ component. The three major indexes of the new ECT（wake-up current, wake-up time, saturation large current） meet the application requirements.

关 键 词：电子式电流互感器 磁场取能 自励源 

分 类 号：TM452[电气工程—电器]