A power harmonic analysis method using quasi-uniform sampling

被引：0
|
作者：
Chen Y. [1 ]
Yang Y. [1 ]
Xie Y. [2 ]
Ding H. [2 ]
机构：
[1] School of Computer Science, Xijing University, Xi'an
[2] Information and Communications Institute, National University of Defense Technology, Xi’an
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2022年 / 50卷 / 16期
基金：
中国国家自然科学基金;
关键词：
harmonic analysis; MCU; quasi-synchronization; quasi-uniform sampling; spectral leakage;
D O I：
10.19783/j.cnki.pspc.220221
中图分类号：
学科分类号：
摘要：
There are problems of sampling in multiple signal periods, with high complexity and uneven harmonic leakage distribution in the quasi-synchronous windowing analysis method of the power harmonic. Thus a fast and accurate power harmonic analysis method suitable for MCU is proposed using quasi-uniform sampling. The time discrete error of quasi-uniform sampling does not accumulate with continuous sampling, so two integer power synchronous sampling points can be obtained in one signal cycle, and harmonic analysis can be realized directly with the help of a FFT algorithm. Based on the fundamental component approximation of the signal and assuming that the time discrete and amplitude quantization errors of signal sampling obey a uniform distribution, the power harmonic estimation error using quasi-uniform sampling is analyzed. The algorithm and specific implementation process of power harmonic analysis are given. In the process, the sampling time is accurately controlled by long integer variables, and the algorithm is simple and efficient. Finally, the quasi-uniform sampling harmonic analysis algorithm is simulated. The results show that fast and accurate power harmonic analysis can be realized based on a general purpose MCU. © 2022 Power System Protection and Control Press. All rights reserved.
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页码：115 / 120
页数：5
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