基于预测控制的并网逆变器参数鲁棒性分析

Robustness Analysis of Grid-connected Inverter Parameters Based on Predictive Control

针对传统的有限控制集模型预测控制(FCSMPC)在参数不匹配时,会导致其控制方法的鲁棒性较差的问题,提出了一种通过引入Luenberger观测器来估算由参数不匹配引起的干扰的方法,该方法将干扰补偿到FCSMPC中,提高了控制系统的鲁棒性和稳定性。此外,还考虑了FCSMPC中的延迟补偿问题以及低开关频率问题。最后搭建实验平台对所提控制策略进行验证,实验结果验证了所提控制策略的有效性。

The problem is addressed that the traditional finite control set model predictive control(FCSMPC) leads to poor robustness of its control method when the parameters are mismatched,and a method is proposed to estimate disturbances caused by parameter mismatch by introducing a Luenberger observer,which compensates disturbances into the FCSMPC and improves the robustness and stability of the control system.In addition,the delay compensation problem and the low switching frequency problem in FCSMPC are considered.Finally,an experimental platform is built to verify the proposed control strategy,and experimental results verify the effectiveness of the proposed control strategy.