基于线性自抗扰控制的单相电力电子变压器整流级控制策略

Single-phase power electronic transformer rectifier stage control strategy based on linear active disturbance rejection control

针对电力电子变压器的非线性特性,传统PI控制的单相电力电子变压器整流级具有对参数变化敏感,响应速度慢,抗扰性能差的特点。提出了一种基于线性自抗扰控制(line active disturbance rejection control,LADRC)的电压环控制策略,该控制策略具有响应速度快、超调量小、鲁棒性强的特点。在仿真软件MATLAB/Simulink中通过搭建三级联H桥整流器模型进行仿真,并与传统PI控制器相比较,仿真结果表明所采用控制策略的优越性、有效性。

According to the nonlinear characteristic of power electronic transformer,the single-phase power electronic transformer rectifier stage controlled by traditional PI is sensitive to parameter variation with slow response speed and poor anti-interference performance,a voltage loop control strategy based on linear active disturbance rejection control(LADRC)is proposed in this paper.The control strategy has the characteristics of fast response,small overshoot and strong robustness.The model of triple cascaded H-bridge rectifier is built and simulated in Matlab/Simulink.Compared with the traditional PI controller,the simulation results show that the proposed control strategy is more superior and effective.