摘要
利用坐标变换建立电网电压定向d、q坐标系下的数学模型。在此基础上,对LCL型并网逆变器中LCL滤波的稳定性进行了分析,然后分别在重复控制系统稳定性条件、补偿函数设计方法等方面进行理论分析和推导计算。通过Matlab分别对PI控制、重复控制、PI与重复复合控制进行仿真试验,对理论分析进行验证。试验结果表明,PI与重复控制策略既保持了重复控制良好的稳态特性,也明显改善了系统的动态性能。
Grid voltage orientation on the dq coordinates of the mathematical model was built by using the coordinate.Based on the mathematical model,the stability of grid-connected inverter LCL filter was analyzed,and the repetitive control system stability conditions,the compensation function design methods were analyzed and calculated respectively.Through the Matlab on PI control,repetitive control,and repetitive PI composite control simulation experiment,the theoretical analysis was verified.The test results show that the PI and repetitive control strategy can not only maintain the repetitive control with good steady-state performance,but also significantly improve the system dynamic performance.
出处
《低压电器》
2012年第5期29-33,共5页
Low Voltage Apparatus
关键词
并网逆变器
LCL滤波器
重复控制
grid-connected inverter
LCL filter
repetitive control
