电力系统保护与控制2016，Vol.44Issue(9)：1-6,6.DOI:10.7667/PSPC151078
基于分段插值同步化算法的谐波测量
Harmonic measurement based on piecewise interpolation synchronization algorithm
吴超凡 1陈隆道1
作者信息
- 1. 浙江大学电气学院，浙江杭州 310027
- 折叠
摘要
Abstract
Due to spectrum leakage, traditional harmonic measurement methods based on FFT lead to a larger error in the measurement of the fundamental frequency offset signal or the unsteady periodic signal. Now this paper uses a method of time domain interpolation to reposition asynchronous sampling sequence, segments sequence and analyze it respectively by using linear interpolation algorithm or Hermite interpolation algorithm according to the sequence of second difference quotient. Then two situations that the fundamental frequency offset is fixed and fundamental frequency is fluctuating are calculated. The results show that piecewise interpolation synchronization algorithm can be applied to the above two cases. Taking computational efficiency into account, it can meet the accuracy requirement of GBT 17626.7-2008 at the same time. The piecewise interpolation synchronization algorithm is a kind of practical method.关键词
非同步取样/同步化算法/分段插值算法/时变信号/频谱泄漏Key words
asynchronous sampling/synchronization algorithm/piecewise interpolation algorithm/time-varying signal/spectrum leakage引用本文复制引用
吴超凡,陈隆道..基于分段插值同步化算法的谐波测量[J].电力系统保护与控制,2016,44(9):1-6,6.
