摘要
传统PWM整流器直接功率控制(DPC)中,靠近基本电压矢量的地方,容易出现无功功率失控现象,导致网侧电流出现畸变和较大的直流电压波动。从PWM整流器瞬时功率数学模型出发,分析了开关矢量对瞬时有功功率和无功功率的作用机理,设计了一种基于新扇区空间划分方法和新开关矢量表的PWM整流器DPC策略,该方法具有兼顾有功功率调节的快速性、抑制无功波动和降低开关频率的功能。仿真和实验结果验证了该方法的有效性和可行性。
The reactive power is out of control near the fundamental voltage vector in traditional direct power control （DPC） system, which leads to the current distortion at AC side and the voltage fluctuation at DC side.The functioning mechanisms of the instantaneous active power and the reactive power are analyzed in view of the mathematical model of PWM rectifier DPC system.A new control strategy is designed based on novel switching table and novel sector division. This method has the advantages of rapid regulation for instantaneous active power, and can restrain reactive power fluctuation and reduce switching frequency.Simulation and experimental results verify its feasibility and effectiveness.
出处
《电力电子技术》
CSCD
北大核心
2013年第2期72-75,共4页
Power Electronics
基金
山东省科技发展计划项目(2011YD01051)
山东省博士后创新项目专项资金(201202008)
济宁学院青年科研基金(2011QNKJ06)~~
