为改善单相两电平PWM整流器的动态性能，本文在传统外环采用PI控制，内环采用功率前馈解耦直接功率控制的双闭环控制方法基础上，提出一种改进控制策略，即引入基于线性自抗扰(LADRC)的电压外环，以减小直流侧电压的超调量,提高系统的响应速度，并增强其抗负载扰动能力。进一步在功率前馈解耦控制的基础上，引入二阶广义积分(SOGI)构建虚拟正交分量，以提高网侧电流对电压的追踪能力，提升系统的动态性能。最后，通过MATLAB/Simulink建立系统仿真模型并进行仿真，对所提出改进控制策略的可行性和有效性进行了验证。

In order to improve the dynamic performance of single-phase two-level PWM rectifier, this paper proposes an improves control strategy based on the dual closed-loop control method of PI control in the traditional outer loop and power feed-forward decoupling direct power control in the inner loop, and introduces a voltage outer loop based on Linear Automatic Disturbance Rejection Control (LADRC) to reduce the overshoot of the DC side voltage and improve the response speed of the system, and enhance its anti-load disturbance ability. Furthermore, on the basis of power feed-forward decoupling control, SOGI is introduced to construct virtual quadrature components to improve the tracking ability of current to voltage on the grid side and improve the dynamic performance of the system. Finally, the system simulation model is established by MATLAB/Simulink and simulates, and the feasibility and effectiveness of the proposed improved control strategy are verified.

辽宁省交通科技项目(202243)