CAJ | 학술논문

针对三相三电平 Vienna 整流器存在的固有中点电压波动问题，提出将直流侧中点电压偏差引入滞环电流闭环控制中，通过调节指令电流的直流偏移量实现直流侧中点电压平衡控制。结合等效电路分析了 Vienna 整流器滞环电流工作原理，设计了电压外环控制器，并给出了滞环宽度和中性点补偿系数的选取依据。最后搭建了一台 Vienna 整流器样机对该方案进行了验证，实验结果验证了该方案的可行性。
침대삼상삼전평 Vienna 정류기존재적고유중점전압파동문제，제출장직류측중점전압편차인입체배전류폐배공제중，통과조절지령전류적직류편이량실현직류측중점전압평형공제。결합등효전로분석료 Vienna 정류기체배전류공작원리，설계료전압외배공제기，병급출료체배관도화중성점보상계수적선취의거。최후탑건료일태 Vienna 정류기양궤대해방안진행료험증，실험결과험증료해방안적가행성。
In allusion to inherent neutral point potential voltage fluctuation in three-phase three-level Vienna rectifier, it is pointed out to lead the neutral point voltage deviation at DC side into the hysteresis current control to implement the balance control of neutral point voltage at DC side via adjusting the DC offset of reference current. According to its equivalent circuit, the working principle of hysteresis current control for Vienna rectifier is analyzed and an outer-loop voltage controller is designed, and the foundation to choose the hysteresis width and the compensation coefficient of neutral point is given. Finally, a prototype of Vienna rectifier is constructed to validate the proposed hysteresis current control method, and experimental results show that the proposed control method not only possesses good static and dynamic performances as well as satisfactory neutral point voltage balancing characteristics, but also can make the Vienna rectifier having satisfactory grid-side performance.