CAJ | 학술논문

分析了三相电压型PWM整流器直接功率控制策略原理,结合整流器直接功率控制的特点,对主电路参数进行了设计和选取。根据PWM整流器在同步旋转dq坐标系中的数学模型,建立了其功率控制模型,并对直流电压外环PI控制器进行了设计。针对传统开关矢量表过多地采用零矢量而导致瞬时功率波动较大和电流波形差的问题,引入优化的开关矢量表。仿真结果表明,优化的开关矢量表克服了传统开关矢量表对瞬时功率控制上的不足,可以获得更好的稳态和动态控制效果。
분석료삼상전압형PWM정류기직접공솔공제책략원리,결합정류기직접공솔공제적특점,대주전로삼수진행료설계화선취。근거PWM정류기재동보선전dq좌표계중적수학모형,건립료기공솔공제모형,병대직류전압외배PI공제기진행료설계。침대전통개관시량표과다지채용령시량이도치순시공솔파동교대화전류파형차적문제,인입우화적개관시량표。방진결과표명,우화적개관시량표극복료전통개관시량표대순시공솔공제상적불족,가이획득경호적은태화동태공제효과。
Analysis was made to the principle of three-phase voltage source pulse width modulation（PWM） rectifier with direct power control strategy.Combining with the characteristics of direct power control rectifier,this paper designed and selected the power circuit parameters.The power control model of PWM rectifier was established according to the mathematical model of PWM rectifier in synchronous dq coordinate,the PI controller of DC voltage outer loop designed.An optimal switching vector table was introduced to solve the problem of larger instantaneous power fluctuations and poor current waveform caused by traditional switching vector because of too much zero vectors.The simulation results indicate that the weakness of traditional switching table for control of instantaneous power is overcome by the optimal switching vector table.Better static and dynamic control effect can be obtained.