贺诗明;熊健;

• 1:强电磁工程与新技术国家重点实验室(华中科技大学)

摘要(Abstract)：

对于LCL型并网逆变器,当采用机侧电流单环反馈时,数字控制产生的延时将改变系统的相位特性,影响系统稳定性。为了降低延时对系统的影响,提出了一种基于牛顿插值法的延时补偿策略,利用第k拍以及k?1拍控制量的线性组合预测第k拍的装载信号。该种方法实质为电流环前向通道提供了一个相位超前环节,补偿了延时带来的相位滞后,从而避免?180°相位穿越点位于谐振角频率处,提高了系统鲁棒性。最后,仿真和实验结果证明了上述理论的正确性。

关键词(KeyWords)： LCL型并网逆变器;机侧电流反馈;稳定性;牛顿插值;延时补偿

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 贺诗明;熊健;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.2533

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