An Improved Harmonic Analysis Algorithm based on Convolution Window and Interpolated FFT in Electrical Power Grid
FFT algorithm is widely used in the power system harmonic analysis. But in traditional FFT, big harmonic measurement error appeared caused by spectral leakage & hurdle effect while unsynchronized sampling. In this paper, an improved algorithm introduced, a FFT with convolution windows and interpolated value is proposed to improve measuring accuracy of frequency, harmonic phase and amplitude through additional windows & interpolated corrective value. Guyuan Power Grid parameters of Ningxia Province were used into simulation analysis, the verification between simulation results and actual test reports shows that: improved algorithm effectively enhance the accuracy of harmonic measurement with very limited spectral leakages and hurdle effects, and meanwhile simplified the whole operation.
electrical power grid harmonic analysis convolution window interpolated FFT algorithm spectral leakage hurdle effects measurement accuracy
Hui Dong Chaoxue Wang Shuping Xu Weiguo Liu
School of Automation, Northwestern Polytechnical University Xian, China School of Information and C School of Information and Control Engineering, Xian University of Architecture and Technology Xi School of Automation, Northwestern Polytechnical University Xian, China
国际会议
太原
英文
230-233
2011-02-26（万方平台首次上网日期，不代表论文的发表时间）