基于模糊开关表的整流器瞬时功率控制策略

摘要

为了使三相电压型整流器取得较高的波形质量和优越的抗扰动能力，提出一种基于模糊开关表的瞬时功率控制策略。采用基于模糊控制的开关状态选择方法，根据模糊控制器输出，利用所设计的开关状态控制器，在固定时间间隔内直接给出各开关状态。仿真和实验结果表明，与传统瞬时功率控制策略相比，本文所提策略在稳态时能有效提高系统的瞬时功率和电流波形质量；当直流侧负载突变时，也能使系统获得更快的响应速度，进一步验证了所提策略的可行性及优越性。%A fuzzy switching table based instantaneous power control method is proposed for the rectifier to improve the waveform quality and the disturbance rejection ability.The fuzzy-based switching states selection method is employed.It determines the switching state in the fixed time interval according to the fuzzy controller output and the switching states controller.The simula-tion and experiment results show that,compared with the classical instantaneous power control method,the proposed method can effectively improve the instantaneous power and current quali-ty,and ensure the faster transient response speed when the DC side load changes suddenly.This further confirms the feasibility and superiority of the proposed method.