一种提高差分式光学电流互感器磁场抗扰度的新方法  

A Novel Method to Improve Magnetic Field Immunity of a Differential Optical Current Transducer

作　　者：李深旺[1] 张国庆[1] 于文斌[1] 郭志忠[1] 申岩[1] 

机构地区：[1]哈尔滨工业大学电气工程系,黑龙江省哈尔滨市150001

出　　处：《中国电机工程学报》2013年第36期157-163,22,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(11004040);黑龙江省自然科学基金项目(E201237);中央高校基本科研业务费专项基金(HIT.NSRIF.2013018)~~

摘　　要：针对差分式光学电流互感器抗外磁场干扰能力差的问题,提出一种提高其磁场抗扰度的新方法。建立差分式光学电流互感器的磁场抗扰度数学模型,研究不同布置方式下差分式光学电流互感器的磁场抗扰度特性。研究表明,传统布置方式下差分式光学电流互感器的磁场抗扰度小,是导致其抗外磁场干扰能力差的根本原因。研究发现,差分式光学电流互感器总存在4个磁场抗扰度无穷大的环外P点,据此提出一种最佳方位角优化方案,并给出最佳方位角的计算方法。试验结果表明,差分式光学电流互感器采用最佳方位角优化方案时,相间干扰引起的误差小于0.08%,与传统布置方式相比减少一半。试验结果证明了最佳方位角优化方案的正确性与实用性。The anti-interference ability of differential optical current transducer （DOCT） is weak. A novel method was proposed to improve the magnetic field immunity of DOCT. The mathematical model of magnetic field immunity of DOCT was established, and the magnetic field immunity characters of DOCT arranged in different ways were researched. The research showed that the magnetic field immunities of DOCT arranged in tradition ways are small and lead to a weak anti-interference ability to external magnetic field. The research discovered that there must be four P points around DOCT on where the magnetic field immunities are infinite. Basing on it, the optimization scheme of best azimuth angle was proposed, and the method to calculate the best azimuth angles was provided. The experimental results showed that while the best azimuth angle optimization scheme was applied, the interference error induced by crosstalk was less than 0.08%, which was half of the error of conventional arrangement scheme. Experimental results demonstrate the correctness and practicality of the optimum azimuth optimization scheme.

关 键 词：直通光路 差分式光学电流互感器 磁场抗扰度 相间磁干扰 最佳方位角 

分 类 号：TM452[电气工程—电器]