摘要
针对直接功率控制中传统开关表构造的不足导致系统调节能力不稳定的问题,本文提出了一种新调制策略,通过改进开关表的方法来改进整流器的调节能力和输入输出性能。仿真结果表明,新的调制策略使无功电流在靠近整流器电压矢量附近区域内的失控现象得到了明显削弱,能够有效地对有功功率和无功功率进行控制,使整流器更接近单位功率因素运行。
In order to resolve the problem of unsteady of system adjustment caused by structure deficiency of traditional switching table,this paper put forward a novel modulation strategy of direct power control of PWM rectifier based on virtual flux,which through restructure switching table to improve adjustment ability and characteristics of input and output of rectifier.The simulation result showed that the novel strategy can weaken the phenomenon that reactive current is out of control near the voltage vector,control active power and reactive power effectively and ensure rectifier operates under unit power factor.
出处
《变频器世界》
2011年第6期73-75,128,共4页
The World of Inverters
关键词
新型开关表
变流器
DPC
New type switching table
Converter
DPC
