【摘要】 DSTATCOM采用直接电流控制方法来抑制由于波动性负荷引起的电压闪变时,其无功电流的跟踪性能对装置的抑制效果起着决定性的作用。考虑到常规PI控制在设计控制器时参数整定的困难和电网参数动态变动的特性,提出利用模糊逻辑对PI控制器的参数进行在线调整,使得DSTATCOM具有很强的自适应性和鲁棒性。当电网参数发生变化时,DSTATCOM仍能很好的抑制电压闪变。数字仿真结果验证了控制策略的正确性和有效性。更多还原

【Abstract】 The effect of voltage flicker mitigation of DSTATCOM with direct current control is lies on the reactive current tracking capability.Considerations for the difficulty in designing PI parameter of the conventional PI controller and the variation of the power system,a fuzzy self-adaptive PI controller for adjust the PI parameter on line are proposed.Under this control strategy the DSTATCOM has the characteristics of adaptive and robust,even the parameters of the power system changed it has excellent performance of voltage flicker mitigation.The availability of the control strategy is validated by digital simulation results.更多还原