微电网不平衡负荷下储能系统下垂控制的改进策略

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) Pub Date : 2016-05-22 DOI:10.1109/IPEMC.2016.7512714

Jinhang Hu, Qiong Tao, Bingyu Sang, Pingliang Zeng, Yu Zhang

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引用次数: 1

摘要

在微电网系统中，负载不平衡会导致电压和电流不平衡，从而导致电能质量和运行安全问题。本文提出了一种基于三相独立控制的改进下垂控制策略。该方法分别考虑三相有功功率、无功功率和电压，形成各相独立的下垂控制曲线。通过对各独立下垂系数的微调，可以消除储能系统阻抗参数不平衡的影响。通过单独调节各相的二次调节值，可以解决电压电流不平衡的问题。建立了仿真模型和实验系统，验证了该算法的可行性。结果表明，该控制策略能够提高微电网的电能质量，在三相不平衡系统中具有良好的稳定性。

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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An improved droop control strategy of energy storage system for unbalanced load in micro-grid

In micro-grid system, voltage and current can become unbalanced due to unbalanced load, causing power quality and operation security problem. In this paper, an improved droop control strategy based on three-phase independent control is proposed. In this method, the independent droop control curve of each phase is formed by considering three-phase active power, reactive power and voltage respectively. The influence of unbalanced impedance parameters of energy storage system can be eliminated by fine-tuning each independent droop coefficient. The voltage and current imbalance can be solved by adjusting the secondary regulation value of each phase independently. A simulation model and experimental system are set up to verify the feasibility of the algorithm. The results show that the control strategy can improve the power quality of micro-grid with good stability in the unbalanced three-phase system.

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来源期刊

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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