Research on Power Fluctuation Control of Photovoltaic Generator Sets Considering the Harmonic Distortion Rate

2023 International Conference on Power Energy Systems and Applications (ICoPESA) Pub Date : 2023-02-24 DOI:10.1109/ICoPESA56898.2023.10140494

Hu Yan, B. Huang, Jing Hu, Kaihui Feng, L. Nana, Zihan Meng

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Abstract

Harmonics in the power grid mainly come from photovoltaic (PV) equipment, and the impact of the harmonic distortion rate (THD) is ignored by conventional power fluctuation control methods, which results in a slow response to the output power of the generator sets and poor power fluctuation control. In this paper, a power fluctuation control method for PV generator sets that accounts for THD is proposed. The dynamic equations of each part of the system on axis d and q are calculated based on the topological structure of the PV generator set and its operating characteristics and consequently a PV generator system (genset system) model is established. Based on this model and THD on the non-harmonic source nodes, the weighted harmonics is determined using an entropy weights model and combined with the motor characteristics, the power fluctuation control of PV generator sets is realized by a proportional integral control method. The experimental results show that the proposed method provides faster power response and better power fluctuation control.

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考虑谐波畸变率的光伏发电机组功率波动控制研究

电网中的谐波主要来自光伏发电设备，传统的功率波动控制方法忽略了谐波失真率(THD)的影响，导致发电机组输出功率响应缓慢，功率波动控制效果不佳。本文提出了一种考虑THD的光伏发电机组功率波动控制方法。根据光伏发电机组的拓扑结构及其运行特性，计算出系统各部分在d轴和q轴上的动力学方程，从而建立光伏发电系统(发电机组系统)模型。基于该模型，结合非谐波源节点的THD，采用熵权模型确定加权谐波，结合电机特性，采用比例积分控制方法实现光伏发电机组功率波动控制。实验结果表明，该方法具有较快的功率响应和较好的功率波动控制能力。

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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来源期刊

2023 International Conference on Power Energy Systems and Applications (ICoPESA)

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