谐波分析高效算法的研究

Research on High-efficient algorithm of Analysis of harmonics

从满足电能质量测量的实时性要求出发,尽量减少数据的计算量,研究开发了基于复序列的FFT算法;该算法与FFT比较,分析同样序列长度的电压、电流数据,使其FFT运算量减少了一半.因此该算法在电能质量在线监测系统中得到了很好的应用.

A Fast Fourier transformation（FFT）algorithm based on complex sequences is brought forward in te paper. The algoritm can meet demands of onqine measurement for power quality and reduce amount of calculation. Compared wit traditional Fast Fourier transformation, the algorithm reduces half amount of transformation so as to decrease demand to calculation speed of CPU when it is used to analyze voltage and current data with same length. So the algorithm is applied on the on-line measurement apparatus effectively.