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微电网中微源逆变器带混合负载控制

, PP. 270-277

Keywords: 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

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Abstract:

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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