CAJ | 학술논문

由于三电平整流器功率器件承受电压应力小、输入电流谐波少、正弦度好。因此，文中选取单相三电平PWM整流器为研究对象。分析了各个工作状态下的开关组合及整流器的工作原理，同时选取瞬态直接电流控制作为电流内环控制方法对系统进行了仿真。同时分析了单相PWM整流器网侧电流的3次谐波产生原因，且采用了一种新型谐波抑制方法来消除此3次谐波。通过仿真验证了该新型控制算法对抑制网侧电流3次谐波的有效性，并降低了网侧电流的总谐波畸变率。
유우삼전평정류기공솔기건승수전압응력소、수입전류해파소、정현도호。인차，문중선취단상삼전평PWM정류기위연구대상。분석료각개공작상태하적개관조합급정류기적공작원리，동시선취순태직접전류공제작위전류내배공제방법대계통진행료방진。동시분석료단상PWM정류기망측전류적3차해파산생원인，차채용료일충신형해파억제방법래소제차3차해파。통과방진험증료해신형공제산법대억제망측전류3차해파적유효성，병강저료망측전류적총해파기변솔。
The power device in three-level rectifier has small voltage stress , less input current harmonic , and better sine degree .The various work condition of combined switch and the working principle of the rectifier are ana -lyzed .The transient direct current control is selected as the current inner control method for the simulation of the sys -tem.In addition, the causes of the three times current harmonic on the net side of the single-phase PWM rectifier is analyzed.And a new type of harmonic suppression method is adopted to restrain the current harmonic .Simulation shows the effectiveness of the new control algorithm in restraining the three times current harmonic , and the total har-monic distortion rate is reduced as well .