直流光纤电流互感器谐波测量误差机理及改善

发布时间：2018-01-14 15:45

本文关键词：直流光纤电流互感器谐波测量误差机理及改善　出处：《中国激光》2017年09期 　论文类型：期刊论文

【摘要】：研究了直流光纤电流互感器(DC FOCT)谐波测量误差的产生机理及性能改善方法,建立了互感器闭环信号检测系统和滑动平均输出滤波器的离散域数学模型,对互感器的频率响应特性进行了仿真分析。研究表明,闭环信号检测系统的前向增益和输出滤波器的阶数是影响谐波电流测量准确度的主要因素;在闭环稳定的前提下增大前向增益,同时降低输出滤波器的阶数,可有效减小谐波电流的测量误差。搭建了DC FOCT谐波电流测量误差测试平台,实验结果表明,在50~1200Hz范围内,样机测量误差不超过0.5%,带宽大于10kHz。
[Abstract]:Research on the DC optical current transducer (DC FOCT) harmonic measurement error mechanism and performance improvement method, established the mathematical model of discrete system and sliding transformer loop signal detection average output filter, the frequency response characteristic of the transformer are analyzed. The results show that the closed-loop system prior to the number of signal detection in order to gain and output filter are the main factors influencing the harmonic current measurement accuracy; under the precondition of closed-loop stabilization. To gain, while reducing the order of output filter, which can effectively reduce the measuring error of harmonic current. We built a test platform of measurement error of DC harmonic current of FOCT, the experimental results show that in the range of 50~1200Hz in the prototype, the measurement error is less than 0.5%, more than 10kHz. bandwidth

【作者单位】：中国计量科学研究院电磁计量科学技术研究所;
【基金】：国家重点研发计划重大科学仪器设备开发专项(2016YFF0102401)
【分类号】：TM452
【正文快照】： 高压直流输电系统的换流器是非线性装置,运行过程中会在线路上形成大量的谐波[1]。因此,直流电流互感器对谐波电流的测量应满足一定的准确度要求。国家标准[2]规定,对于50~1200Hz的基波及谐波电流的测量,电子式直流电流测量装置的幅值误差不应超过0.75%,相角误差不应超过500μ

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