矩阵变换器双空间自抗扰闭环控制研究

Closed-loop ADRC Control of Matrix Converter Based on Double Space Modulation

针对矩阵变换器(MC)非线性强耦合的特点,通过分析MC的双空间调制开环模型,提出自抗扰(ADRC)电压闭环控制方案。将MC输入侧虚拟等效为PWM整流器、输出侧虚拟等效为PWM逆变器,推导了输出侧电压方程,构建矩阵变换器电压闭环自抗扰控制模型,通过Park变换,将三相输出电压分解成d-q坐标系下的直流分量。基于ADRC控制策略,设计输出侧电压闭环控制器,跟踪期望电压d、q轴分量,维持输出电压的空间矢量恒定,以消除内、外扰动和不平衡的影响。仿真结果表明基于ADRC的闭环控制方案受参数变化的影响较小,使MC具有良好的动静态特性和较强的鲁棒性。

According to the nonlinear and strongly coupled characteristics of matrix converter（MC）,a voltage closed-loop control scheme is presented with auto-disturbance rejection control（ADRC）by analyzing open-loop model of MC based on double space modulation strategy.The input side of MC is equivaienlly to a PWM rectifier and output side to a PWM inverter,the closed-loop ADRC voltage model of MC is established based on deducing output voltage equations in d-q coordinate system.The three phase output voltages are decomposed into two d-q direct voltages with park transformation.A closed-loop ADRC output voltage controller is designed to track the d-q axis components of the reference voltages and maintain the space vector of output voltages constant,thus eliminate the effects of internal and external disturbance and imbalance.The simulation results indicate that the closed-loop ADRC control strategy is little affected by parameters changes,and endows the MC with excellent dynamic,static performances and better robustness.