基于PCB的空心线圈电流互感器的设计

Design of current transformer for hollow coil based on PCB

为了实现数字化变电站信息通讯等的连通性、集成性,大量的传统电磁式电流互感器被电子式电流互感器所取代,然而大量电子器件、光学器件长期暴露在复杂恶劣的外界环境之中,电子式电流互感器故障率大幅提升。文章对电流互感器在线校准方法进行了研究,分析了电流互感器在线校准存在的问题,设计了基于PCB空心线圈的电流互感器,采用多组错开角度串联方式、双通道在线校准方法,测量误差小、精度高。

In order to realize the connectivity and integration of digital substation information communication, a large number of electromagnetic current transformers are replaced by electronic current transformers. However, a large number of electronic devices and optical device long-term were exposed in the complex and harsh environment, and he fault rate compared with the traditional electromagnetic current transformer increased dramatically. The paper researched on on line calibration method for current transformer, and analyzed the problems of current transformer on line calibration, designing a current transformer based on PCB hollow coil, using method of multiple sets of stagger angle series, double channel on-line calibration,which has small measurement error, and high precision.