基于电子式互感器的基波相位同步算法研究  

Research of fundamental wave phase synchronization based on electronic transformer

作　　者：牟涛[1] 樊占峰 杨智德 赵应兵[1] 安永帅[1] Mu Tao;Fan Zhanfeng;Yang Zhide;Zhao Yingbing;An Yongshuai(XJ Group Corporation,Xuchang 461000,Henan,China)

机构地区：[1]许继集团有限公司,河南许昌461000

出　　处：《电测与仪表》2018年第23期67-70,116,共5页Electrical Measurement & Instrumentation

摘　　要：研究了基于数字信号处理的电子式互感器的基波相位同步方法;针对电子互感器中采用的拉格朗日插值定理存在运算量大的问题,首先研究了两点插值算法在电子式互感器基波相位同步的应用;然后针对其不足,设计了一种新的基波相位同步算法,由模拟相位校正电路通过变换,得到离散域的相位同步函数,通过仿真和实际应用,算法具有理想的幅值和相位特性;最后针对电子互感器传感头之间存在参数差异,与积分算法参数不匹配等原因,导致电子式互感器暂态特性差,相位不同步的问题,改进了积分算法,经过验证,该算法能真实还原基波波形。This paper studies the method of the digital signal processing about the fundamental wave phase synchronization based on electronic transformer.Aiming at the widely applied phase synchronization method based on the Lagrangian interpolation theorem has a problem of heavy computation,firstly,a two-point interpolation algorithm is studied in this paper.Because of the disadvantages,we design a precision correction methods based on analog filter.By the analog filter though the transformation,we obtain the transfer function in the discrete domain.By the simulation and practical application,the algorithm has the ideal curve of amplitude and phase.Finally,because of the difference between transformer and the mismatches of the digital integration,which leads to a bad transient characteristic of the electronic transformer,we improved the integral algorithm,and the algorithm can restore the original waveform perfectly through the simulation.

关 键 词：电子式互感器 相位同步 罗氏线圈 传递函数 数字积分 

分 类 号：TM451[电气工程—电器]