基于电子式互感器的基波相位同步算法研究

本文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；针对电子式互感器中广泛应用的基于拉格朗日插值定理的相位同步方法存在运算量大的问题,首先研究了一种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,设计了一种改进的基波相位同步算法,由模拟相位同步电路通过变换,得到离散域的相位同步函数,通过仿真,算法具有理想的幅值曲线和相位曲线；最后针对电子互感器传感头之间存在参数差异,与数字积分算法参数不匹配等问题,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,算法能真实还原基波波形。

The research of Base Wave Phase Synchronization based on Electronic Transformer

This paper studies the method of the digital signal processing about the base wave phase synchronizationS based on Electronic Transformer. Because the widely applied phase synchronization method based on the Lagrangian interpolation theorem has a problem of heavy computation, Fristly we studied a two-point interpolation algorithm is studied in this paper. SBecause 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. SBy the simulation, Algorithm has the ideal curve of amplitude and phase. Finally because of the the difference between Transformer and the Smismatches of the digital integration, which Lead to a bad transient characteristic of the electronic transformer, we Simproved the integral algorithm, through the simulation, the algorithm can restore the original waveform Sperfectly.