基于EL模型的三电平电压型PWM整流器的无源与PI相结合控制方法研究

Research on a Control Method of Three-level Voltage Source PWM Rectifier Based on Passivity-based Control and PI Control of EL Mode

为了提高三电平电压型PWM整流器的性能,论文提出了基于EL模型的无源控制与PI控制相结合的控制方法。根据三相四线三电平整流器主电路拓扑结构,建立了dq坐标系下的EL模型。基于EL模型,采用注入耗散矩阵的方法,并与PI控制方法相结合,设计了无源控制器。该方法使整流器具有较低的谐波失真、单位功率因数等优点。仿真结果验证了基于无源与PI相结合设计的非线性控制器的可行性。

In order to improve the performance of three-level voltage source PWM rectifier, a control method combined passive control and PI control of EL model is proposed. According to the main circuit topology of three-phase four-wire three-level rectifier, an EL model under dq coordinates is set up. Based on the EL model, a passivity-based controller that used the method of increase the dissipation into the matrix with PI control is designed. There are many advantages of this method, such as low harmonic distortion, unity power factor and so on. The simulation results verify the feasibility of nonlinear controller that based on passivitybased control and PI control.