CAJ | 학술논문

三相电压型Z源PWM整流器既能实现传统PWM整流器的功能，又能实现输出电压的降压变换，并提高了桥臂开关管的抗干扰能力。将Z源整流器等效为交流侧PWM整流和直流侧Z源网络降压变换两级控制系统，重点研究了直流侧的状态空间平均建模方法，得到了系统的小信号控制模型，并推导了从直通占空比到输出电压的传递函数。针对直流侧Z源网络采用电压单闭环控制系统时，输出电压纹波大、稳定性差的问题，提出了引入Z源网络电感电流内环与输出电压外环的双闭环控制系统，并分析了双闭环PI调节器的参数设计方法。仿真和实验结果表明，所建立的Z源整流器模型以及控制系统的设计是正确可行的。
삼상전압형Z원PWM정류기기능실현전통PWM정류기적공능，우능실현수출전압적강압변환，병제고료교비개관관적항간우능력。장Z원정류기등효위교류측PWM정류화직류측Z원망락강압변환량급공제계통，중점연구료직류측적상태공간평균건모방법，득도료계통적소신호공제모형，병추도료종직통점공비도수출전압적전체함수。침대직류측Z원망락채용전압단폐배공제계통시，수출전압문파대、은정성차적문제，제출료인입Z원망락전감전류내배여수출전압외배적쌍폐배공제계통，병분석료쌍폐배PI조절기적삼수설계방법。방진화실험결과표명，소건립적Z원정류기모형이급공제계통적설계시정학가행적。
Three phase voltage source Z-source PWM rectifier can not only achieve conventional PWM rectifier’ s function, but also achieve the output voltage buck conversion, and improve the anti-jamming capability of leg-switching tube. The Z-source PWM rectifier is equivalent to two control systems: the PWM rectifier of AC side and the Z-source network buck conversion of DC side. Focus of the study was the state space average modeling approach of DC side. Then the small-signal control system model and the transfer function from shoot-through duty to output voltage were obtained. For the problems of output voltage’ s large ripple and poor stability when DC-side Z-source network used voltage single-loop control system, a double-loop control system was proposed which contains inner loop of Z-source inductor current and outer loop with output voltage, and the parameter design method of double closed-loop PI regulator was analyzed. Simulation and experiments showed that the Z-source rectifier model and the design of con-trol system was correct and feasible.