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设置扇形边界死区的电压型PWM整流器直接功率控制
引用本文:王久和,李华德,杨立永.设置扇形边界死区的电压型PWM整流器直接功率控制[J].北京科技大学学报,2005,27(3):380-384.
作者姓名:王久和  李华德  杨立永
作者单位:1. 北京科技大学信息工程学院,北京,100083;北京信息工程学院,北京,100101
2. 北京科技大学信息工程学院,北京,100083
摘    要:利用电压型PWM整流器的数学模型分析了PWM整流器直接功率控制(DPC)的原理,讨论了功率滞环比较器环宽对PWM整流器的影响.为了降低开关频率和减少开关损失,增加功率滞环比较器环宽则引起瞬时有功功率和直流电压波动现象;提出了设置扇形边界死区的控制策略,减少扇形边界误选开关量现象,使瞬时有功功率和直流电压波形趋于平稳.通过Simulink环境下仿真模型的仿真,证明了该策略的可行性.

关 键 词:PWM整流器  直接功率控制  死区  扇形边界  开关表  仿真  设置  扇形边界死区  电压型  整流器  直接功率控制  sector  zone  dead  power  control  控制策略  仿真模型  环境  Simulink  电压波形  波动现象  开关量  直流电压  瞬时有功功率  损失  开关频率
修稿时间:2004年6月1日

Direct power control of three-phase boost-type PWM rectifiers with the dead zone of sector borders
WANG Jiuhe,LI Huade,Yang Liyong.Direct power control of three-phase boost-type PWM rectifiers with the dead zone of sector borders[J].Journal of University of Science and Technology Beijing,2005,27(3):380-384.
Authors:WANG Jiuhe  LI Huade  Yang Liyong
Abstract:The direct power control (DPC) principle of three-phase boost-type PWM rectifiers based on the mathematical model of PWM rectifiers was analyzed. The effect of the hysteresis wide of power hysteresis comparators on the properties of the PWM rectifiers was discussed. Since the hysteresis wide is widened for decreasing switching frequency and energy loss, which causes the pulsation of instantaneous active power and direct current voltage, a control strategy with the dead zone of sector borders was proposed for eliminating the mistakes of selecting switch vectors on sector borders and improving the waveforms of instantaneous active power and direct current voltage. Simulink simulation shows the feasibility of the control strategy.
Keywords:PWM rectifier  direct power control  dead zone  sector border  switching table  simulation
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