CAJ | 학술논문

针对三电平VIENNA整流器存在的固有中点电压波动和传统SVPWM(空间矢量脉宽调制)计算繁琐的不足，将直流侧中点电压偏差引入到电压定向电流解耦闭环控制中，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，并探索了一种基于两电平空间矢量平面的三电平SVPWM简化算法。结合等效电路分析了整流器工作原理，并给出了简化SVPWM占空比和中性点补偿系数选取依据。最后搭建了一台实验样机，实验结果验证了该方案的可行性和正确性。
침대삼전평VIENNA정류기존재적고유중점전압파동화전통SVPWM(공간시량맥관조제)계산번쇄적불족，장직류측중점전압편차인입도전압정향전류해우폐배공제중，통과조절지령전류적직류편이량실현직류측중점전압평형공제，병탐색료일충기우량전평공간시량평면적삼전평SVPWM간화산법。결합등효전로분석료정류기공작원리，병급출료간화SVPWM점공비화중성점보상계수선취의거。최후탑건료일태실험양궤，실험결과험증료해방안적가행성화정학성。
Aiming at the inherent problems of midpoint voltage fluctuation and complex space vector pulse width modulation (SVPWM) of three-level VIENNA rectifier, the DC-link midpoint voltage error was in-troduced to the dual closed-loop control and the DC-link midpoint voltage balance control was solved by regulating the DC offset of the reference current. Combining with equivalent circuit, a simplified three-level SVPWM algorithm based on three-level principle was proposed for this topology, the working princi-ple of VIENNA rectifier was analyzed, and finally a prototype of VIENNA rectifier was built. Experimen-tal results show that the adoption of this scheme ensures that the VIENNA rectifier not only owns excellent network-side performance, but also has a good static and dynamic performance and the midpoint balance characteristics.