并网逆变器内模和重复复合电流控制策略研究

摘要

This paper analyzed the features of internal model control and repetitive control.The internal model control has strong disturbance rejection capability,enabling the system to follow the input signal without static errer. The repetitive control is suitable for tracking periodic input signal or suppressing the periodic disturbance. Theoretical analysis and simulation of the grid-connected inverter current control strategy show that the complex combination of grid current control strategy based on internal model control and repetitive control can eliminate the influence of the periodic disturbance,having a good dynamic,steady-state performance.%综合分析了内模控制和重复控制的特点。根据其特点设计了内模和重复复合电流控制的并网逆变器。并进行了理论和仿真分析。结果表明，基于内模控制和重复控制相结合的复合并网电流控制策略具有良好的动态、稳态性能，能够消除周期性扰动的影响。