低直流链电压尖峰的二极管辅助型优化Y源逆变器  

Diode-assisted Optimized Y-source Inverter with Low DC Link Voltage Spike

作　　者：刘鸿鹏 滕禹 卢壮 王卫[2] LIU Hongpeng;TENG Yu;LU Zhuang;WANG Wei(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,China;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]东北电力大学电气工程学院现代电力系统仿真控制与绿色电能新技术教育部重点实验室,吉林132012 [2]哈尔滨工业大学电气工程及其自动化学院,哈尔滨150001

出　　处：《高电压技术》2023年第6期2569-2578,共10页High Voltage Engineering

基　　金：国家自然科学基金(51977045)。

摘　　要：耦合电感的引入使阻抗源逆变器的升压能力得到进一步提高,并改善了传统Z源拓扑中调制比与直通占空比之间的约束关系。然而,漏感的存在导致逆变器出现直流链电压尖峰,恶化了开关器件的工作条件,限制了逆变器的功率等级。为解决上述问题,以优化型Y源逆变器为研究对象,提出一种低直流链电压尖峰的优化Y源拓扑结构,利用无源吸收回路确保逆变器状态切换时直流链电压的平滑过渡,消除了直流链电压尖峰。此外,新提出拓扑继承了优化型Y源逆变器的所有优点,并且在相同的直通占空比下,具有更高的升压能力。最后,通过对比二者的仿真和实验结果,验证了新拓扑在升压能力和抑制电压尖峰方面的优越性能。The introduction of coupling inductor further improves the boost capability of the impedance source inverter,and improves the constraint relationship between the modulation ratio and the pass-through duty cycle in the traditional Z-source topology.However,the existence of leakage inductance leads to DC link voltage spikes in the inverter,which deteriorates the operating conditions of the switching devices and limits the power rating of the inverter.In order to solve the above problems,taking the optimized Y-source inverter as the research object,we propose an optimized Y-source topology with low DC link voltage spikes.The proposed topology utilizes a passive absorption loop to ensure a smooth transition of the DC link voltage during inverter state switching.In addition,the new topology inherits all the advantages of the optimized Y-source inverter,and has a higher boost capability under the same shoot-through duty cycle.Finally,by comparing the simulation and experimental results of the two topologies,the superior performance of the new topology in boosting capability and suppressing voltage spikes is verified.

关 键 词：耦合电感 阻抗源逆变器 漏感 电压尖峰 Y源逆变器 吸收回路 

分 类 号：TM464[电气工程—电器]