基于并联滤波器的多谐波分析算法

New Algorithm for Multi Harmonic Analysis Based on Parallel Filter

提出一种对包含多种谐波的电力信号进行分析的多个二维线性滤波器并联的算法。通过调节每个滤波器的频率参数和带宽参数,该并联滤波器组能够同时实现对任意已知频率的谐波和间谐波的准确跟随和分析,该算法不需要傅立叶算法那样大存储空间。说明了系统是一致全局稳定的,给出传递函数矩阵,分析了频率特性。通过仿真试验,表明新算法对频率已知平稳信号,能实现快速跟随和精确检测,对于频率存在偏差的信号,频率偏移的大小决定了检测精度。

A parallel filter composed of multi two-dimension linear ordinary IIR filters was proposed to analyze power signal including multi harmonics. The new algorithm that needs less memory than Fourier algorithm can track and analyze harmonics and inter-harmonics of known frequency by adjusting the frequency parameter and bandwidth parameter of each filter. The uniformly stability, the transform function matrix and the frequency characteristic were proposed. The simulations indicate that accurate measurement and fast tracking can be achieved with stationary input of known frequency components and the precision is determined to the offset of frequencies.