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。
英文摘要:
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-in-terference 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 rectfier 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.