微电网中微源逆变器带混合负载控制

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摘要为解决微电网中不平衡非线性混合负载对微源逆变器输出电压的影响,提出基于改进型重复控制的并联双环控制策略。采用PI控制与重复控制并联的复合控制结构,并对重复控制器进行改进,使其可以实现无静差控制,有效提高系统的控制精度,实现带载大功率混合负载时较好的控制效果。提出的基于重复控制的并联双环控制策略中,改进型重复控制器决定系统的稳态精度,PI控制器决定系统的动态响应速度。对提出的控制策略进行了仿真和实验研究,结果验证了本文所述控制策略在不平衡和谐波控制及系统稳定性方面的有效性和可靠性。

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	霍群海
	李宁宁

关键词 ：微源逆变器, 不平衡负载, 非线性负载, PI控制器, 改进的重复控制器, 双环控制策略

Abstract：Unbalanced and nonlinear loads are the main factors which affect the output voltage quality of the micro-source inverter. The two-loop control strategy based on improved repetitive controller is proposed for large-capacity micro-source inverter, which executes PI control and repetitive control in parallel. The repetitive controller is improved to realize the repetitive controller with zero steady-state error. The control accuracy of system is effectively improved to achieve better control performance for high-power unbalanced and non-linear loads. The improved repetition controller determines the steady-state accuracy of system and the PI controller determines the dynamic response speed of system. Simulative and experimental results show the efficiency and reliability of the proposed control strategy in unbalanced and harmonic control and system stability.

Key words： Micro-source inverter unbalanced load nonlinear load PI controller improved repetitive controller the two-loop control strategy

收稿日期: 2013-09-19 出版日期: 2014-05-22

PACS:

TM315

基金资助:国家自然科学基金资助项目（51107134, 51307158）

作者简介: 霍群海男, 1981年生, 博士, 助理研究员, 主要从事电能质量控制及DFACTS装置研究。李宁宁男, 1984年生, 通讯作者, 硕士, 助理研究员, 主要从事储能装置研究。

引用本文:

霍群海, 李宁宁. 微电网中微源逆变器带混合负载控制[J]. 电工技术学报, 2013, 28(2增): 270-277. Huo Qunhai, Li Ningning. Research on Control Strategy of Micro-Source Inverter with Mixed Load in Micro-Grid. Transactions of China Electrotechnical Society, 2013, 28(2增): 270-277.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I2增/270

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