基于PI重复控制的三相整流器研究

Three-phase Rectifier Based on PI Repetitive Control

传统PI控制器算法简单实用、动态响应速度较快,但无法实现无静差控制且稳态性能不理想。重复控制器可以实现对交流信号无静差跟踪、有效抑制谐波,但其控制具有滞后性、动态性能较差。采用PI控制和重复控制相结合的复合控制策略,以TMS320F28335DSP为核心设计一台6kVA三相电压型PWM整流器样机。实验结果表明该方法在抑制电流谐波方面作用明显,能够提高系统的稳态精度和动态性能。

Traditional PI controller algorithm is simple and practical with faster dynamic response,but cannot control without static errors and stability is not ideal.Repetitive controllers can track communication signals without static errors,and effectively suppress the harmonic,but its control is lagging behind and its dynamic performance is relatively poor.This paper proposed a control strategy combining PI control and repetitive control,with tms320f28335 dsp as the core design a 6KVA three-phase voltage source PWM rectifier.The experimental results show that the method in the suppression of the current harmonics has obvious effect,and can improve the steady-state accuracy and dynamic performance.