基于LCL简化模型的PWM变流器电流环控制策略

Current Loop Control Scheme of PWM Converter based on Simple Module of LCL Filter

通过研究LCL滤波器的完整数学模型,得到了一种基于LCL滤波器简化模型的电流环控制结构。该控制结构在不降低系统性能的情况下,能抑制电流高频开关谐波,在动态时又能保证电流的稳定和快速响应。通过仿真和样机实验证实了这一控制结构的正确性和有效性。

Through studying complete mathematical module of LCL fiher,a current loop control structure of PWM voltage source converter based on simplified module of the LCL filter is derived.Tbe control structure does not reduce system performance, and can inhibit high frequency switching harmonics in the current and guarantee the current being stable and rapid response in a dynamic process.The simulation and prototype experimental result confirms that the simple control structure is correct and effective.