A Method for Selecting Harmonic Monitoring Points Considering Correlation between Voltage Value and Harmonic Distortion Rate

2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE) Pub Date : 2023-05-12 DOI:10.1109/CEEPE58418.2023.10165947

Hongtao Sheng, Huaying Zhang, Qing Wang, Jun Tao, Qianlong Zhu

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Abstract

The harmonic distortion level of nonlinear load in distribution network has been widely concerned. At the same time, the monitoring of distribution system is insufficient, and it is difficult to reflect the overall harmonic level by setting fewer harmonic monitoring points. In order to solve this problem, this paper proposes a method to determine harmonic monitoring points by using voltage value according to the correlation between voltage value and harmonic distortion rate. The proposed method for setting harmonic monitoring points uses the fundamental voltage value of each bus collected from traditional smart meters. By comparing the correlation between fundamental voltage index and harmonic voltage distortion rate, it is found that the fundamental voltage index has a strong correlation with harmonic voltage distortion rate. It is proposed to use Pearson correlation coefficient matrix of fundamental voltage index to determine harmonic monitoring nodes through optimization algorithm. In this paper, IEEE-14 node is used to verify this method. The results show that the harmonic level of the whole distribution network can be reflected by setting a few harmonic monitoring points.

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考虑电压值与谐波失真率相关性的谐波监测点选择方法

配电网中非线性负荷的谐波失真程度一直受到广泛关注。同时，对配电系统的监测不足，通过设置较少的谐波监测点难以反映整体谐波水平。为了解决这一问题，本文提出了一种根据电压值与谐波失真率的相关性，利用电压值确定谐波监测点的方法。该方法利用传统智能电表采集的各母线基电压值设置谐波监测点。通过比较基频电压指数与谐波电压失真率的相关性，发现基频电压指数与谐波电压失真率有很强的相关性。提出通过优化算法，利用基本电压指数的Pearson相关系数矩阵确定谐波监测节点。本文使用IEEE-14节点对该方法进行验证。结果表明，通过设置几个谐波监测点，可以反映整个配电网的谐波水平。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2023 6th International Conference on Energy, Electrical and Power Engineering (CEEPE)

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