摘要
在现行电压型PWM整流器的直接功率控制策略中,利用开关表同时对有功功率和无功功率进行调节,对无功功率的调节能力强于对有功功率的调节。则导致了在暂态和抗扰过程中有功功率、直流电压出现较大的波动,系统跟踪给定速度慢,对负载运行不利。对此,提出了根据有功功率瞬时值与给定有功功率的差值设定无功功率给定值的新策略。该新策略有效地抑制了直接功率、直流电压的波动,加快了有功功率、直流电压的跟踪速度,提高了系统的抗扰能力。仿真结果证明了该新策略的可行性。
In current direct power control （DPC） of voltage source PWM rectifiers, the active and reactive power are controlled simultaneously by using switching table, and the switching table of the DPC system has stronger adjustment on reactive power than on active one. From above, the DPC system of voltage source PWM rectifiers causes the fluctuation of active power and DC voltage during the starting state and load disturbance, and has lower tracking ability, and is disadvantageous for the load operation. A new strategy setting reference reactive power based on the error between the instantaneous active power and reference active power was proposed. The strategy decreased the fluctuation of active power and DC voltage, enhanced tracking ability of active power and DC voltage and the ability of anti-disturbance. The simulation result shows the feasibility of the new control strategy.
出处
《电气传动》
北大核心
2007年第5期27-30,共4页
Electric Drive
基金
北京市教育委员会科技发展计划项目(KM200510772001)
