一种新型抗直流电流互感器检定系统的研究  

Research on test system of a novel anti-DC current transformer

作　　者：王保帅 肖霞[1] 徐雁[1] 宋宏天 WANG Baoshuai;XIAO Xia;XU Yan;SONG Hongtian(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《电力系统保护与控制》2018年第17期68-74,共7页Power System Protection and Control

基　　金：国家自然科学基金青年基金项目资助(51307066)~~

摘　　要：针对目前抗直流互感器缺乏相关标准和性能检定系统的现状,在传统互感器校验法的基础上,提出一种无需标准互感器的数字式直接校验法。通过分析现有标准,利用半波电流进行检定,提出抗直流互感器在半波电流下的误差极限。通过频谱分析,得出了抗直流互感器和传统电磁式互感器在半波电流下的传变特性。为减小频谱泄露影响,采用加窗插值傅里叶分析算法进行比差的计算,并推导出相关的修正式。进行了检定系统的软硬件设计和样机的研制。实验测试表明:该检定法可提高检定系统的可靠性,具有较好的稳定性、可操作性和实用性。Aiming at the current situation of lack of relevant standards and performance testing devices for anti-DC transformers,and combining with the traditional transformer calibration method,a digital direct calibration method without standard transformer is proposed.Through the analysis of the existing standard and the use of half-wave current,this paper presents the error limit of anti-DC transformer under half-wave current.Through the spectrum analysis,the transmission characteristics of anti-DC and traditional electromagnetic transformers under half-wave current are obtained.In order to reduce the influence of spectrum leakage,the windowing interpolation Fourier analysis algorithm is used to calculate the ratio difference,and the relevant amendments are derived.The hardware and software design of the test system and the prototype development are carried out.Experimental results show that this method can improve the reliability of the test system and has good stability,operability and practicability.

关 键 词：抗直流互感器 检定系统 数字式校验 半波电流 傅里叶分析 

分 类 号：TM452[电气工程—电器]