一种基于虚拟矢量PWM的准Z源三电平逆变器新型控制算法实现  

Implementation of Novel Control Algorithm for Quasi-Z-source Three-level Inverter Based on Virtual Space-vector PWM

作　　者：柴锦 刘通 王伟胜 陈阿莲[4] CHAI Jin;LIU Tong;WANG Weisheng;CHEN Alian(Engineering Training Center,Shandong University,Ji’nan 250061,China;School of Electrical Engineering,Shandong University,Ji’nan 250061,China;Shandong Aotai Electric Co.,Ltd.,Ji’nan 250104,China;School of Control Science and Engineering,Shandong University,Ji’nan 250061,China)

机构地区：[1]山东大学工程训练中心,济南250061 [2]山东大学电气工程学院,济南250061 [3]山东奥太电气有限公司,济南250104 [4]山东大学控制科学与工程学院,济南250061

出　　处：《电源学报》2025年第2期57-66,共10页Journal of Power Supply

基　　金：国家自然科学基金资助项目(U2006222);国家重点研发计划资助项目(2022YFB2402903)。

摘　　要：准Z源三电平逆变器的升压控制和中点电位平衡控制之间的耦合严重限制了其控制性能。为解决上述问题,提出1种基于虚拟矢量脉宽调制方法的中点电位平衡策略,通过直流母线电容电压闭环控制实现中点电位平衡控制,消除了中点电位低频波动,同时采用恒直通升压调制策略,避免了升压控制对中点电位的影响,保证了准Z源网络充足的升压空间。最后通过仿真和实验验证了所提控制策略的有效性。The coupling between the boost control and neutral-point voltage balance control of a quasi-Z-source three-level inverter seriously limits its control performance.To solve this problem,a neutral-point voltage balance control strategy based on a virtual space-vector pulse width modulation method is proposed.The neutral-point voltage balance control is realized through a closed-loop control of the DC-bus capacitor voltage,and the low-frequency fluctuations in the neutral-point voltage are eliminated.Meanwhile,a constant shoot-through boost modulation strategy is employed,which avoids the adverse impact on the neutral-point voltage and guarantees an ample boosting capacity of the quasi-Z-source network.Finally,simulation and experimental results verified the validity of the proposed control strategy.

关 键 词：准Z源三电平逆变器 中点电位平衡 虚拟矢量脉宽调制 

分 类 号：TM464[电气工程—电器]