电压不平衡情况下三相电压型PWM整流器控制策略研究

In the network voltage unbalanced situations, the ac current is not symmetrical, appear negative sequence components.Negative sequence current existence, affect the three-phase PWM converter performance.In order to restrain the ac negative sequence current research inhibition of ac, negative sequence current control strategy.After for grid unbalanced situations plus or minus sequence components of separation methods study, adopting instantaneous the three-phase symmetric component power plus or minus sequence separation.Thus puts forward the imbalance of power control strategy, then in MATLAB/Simulink environment, the simulation results verify that the control strategy can very good inhibit the ac current negative sequence components.