A Measurement Method of Supraharmonics Based on Partial Sampling and Hybrid Segmentation

被引：0
|
作者：
Wang Z. [1 ,2 ]
Li Q. [1 ]
Jiang J. [2 ]
Zhang H. [2 ]
Zheng C. [1 ]
机构：
[1] State Grid Henan Electric Power Research Institute, Zhengzhou
[2] School of Electrical Engineering, Zhengzhou University, Zhengzhou
来源：
Dianwang Jishu/Power System Technology | 2021年 / 45卷 / 01期
关键词：
Field test verification; Hybrid segmentation; Measurement method; Partial sampling; Simulation analysis; Supraharmonics;
D O I：
10.13335/j.1000-3673.pst.2019.1764
中图分类号：
学科分类号：
摘要：
Widespread use of high-frequency power electronic devices causes the problem of increasingly serious supraharmonics in power grid. However, existing harmonic measurement method has problems such as slow measurement speed and a large amount of processing data when measuring supraharmonics with wider frequency range. Furthermore, there is no uniform and effective standard for supraharmonics measurement. In this paper, a hybrid measurement method based on characteristic frequency segmentation is proposed on the basis of comprehensive analysis of the correlation between the frequency characteristics of supraharmonics generated by power electronic converter equipment and switching frequency. Harmonic peak is obtained by partial sampling FFT operation to calculate the switching frequency, and the segmentation strategy of spectrum aggregation is automatically determined according to the peak characteristics around the switching frequency and its multiple frequencies. Simulation analysis shows that the proposed method can effectively improve measurement speed based on accurate measurement of supraharmonics. Field-test results verify feasibility and effectiveness of the method. This paper provides a new idea to unify supraharmonics measurement standard. © 2021, Power System Technology Press. All right reserved.
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页码：339 / 346
页数：7
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