一种基于分裂源的双输出 T 型三电平逆变器  

A Dual-Output T-Type Three-Level Inverter Topology Based on Split Source Inverter

作　　者：王汝田 王浩[1] 袁帅 邵鑫铭 刘闯 Wang Rutian;Wang Hao;Yuan Shuai;Shao Xinming;Liu Chuang(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 Southeast University,Nanjing 210096,China)

机构地区：[1]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(东北电力大学),吉林132012 [2]东南大学电气工程学院,南京210096

出　　处：《电工技术学报》2024年第24期7777-7792,共16页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52277170)。

摘　　要：该文提出了一种基于分裂源的双输出T型三电平逆变拓扑结构。所提出的拓扑结构具有直流环节和逆变环节,其中直流环节提供升压能力,逆变环节提供三相双输出三电平逆变功能,并介绍了提出的拓扑结构及其工作原理。然后分析了在正弦脉宽调制方案中,同频同相、同频异相和异频工作模式下,调制参数的可选择值域,保证了电容电压平衡、正确的升压能力和双输出功能的实现,并在分析电感电流的基础上,通过对调制方案的讨论,对电感和电容的性能进行了优化,包括3次谐波注入法以及两种空间矢量调制的载波化调制方法,以使对电感值和电容值的需求最小化。建立了低功耗实验样机,并给出了实验结果,验证了所提拓扑结构的可行性,以及同等硬件参数、不同调制方案下对电感纹波电流、电容纹波电压的改善。Multi-level inverters perform better than two-level inverters.Using dual output inverters to reduce the number of switching tubes is a trend in developing power electronic topologies for cost reasons.The conventional voltage-source inverter is a buck topology.In many application scenarios,a DC boost topology is often added before the inverter topology to meet the high-magnitude requirements of the output-side voltage.This paper proposed a dual output T-type three-level inverter topology based on a split-source inverter(SSI)using SSI topology to improve the dual output T-type three-level converter.The SSI topology can reduce the high-magnitude requirements for the DC supply voltage and hardware cost,improving power efficiency.The hardware cost was saved by multiplexing the switching tubes in the inverter and DC boost links.The DC supply voltage passed through the SSI topology and charged the capacitor on the DC side of the inverter link.Thus,the DC side voltage of the inverter link was high,i.e.,the high-magnitude requirement of the DC supply voltage was reduced.The energy transfer path was shortened,and the power efficiency was improved.A separate SSI topology controls the capacitor voltage.The charging of each DC-side capacitor in inverter was completed by a separate SSI topology,and the capacitor charge or discharge duty cycle was controlled by the modulation process of the inverter.If the capacitor is charged and discharged normally,even in the case of open-loop control,the capacitor voltage will not lose stability,thus simplifying the control of the neutral-point potential balance.A method for determining the range of modulation parameters based on the input and output parameters of the operating parameters was proposed.The boost multiple of the DC link is related to the modulation parameters,and the input parameters are related to the capacitor voltages and modulation parameters of the inverter link.Therefore,combined with the constraint relationship,this paper proposed a method to determine the range of mod

关 键 词：双输出 三电平 分裂源 逆变器 谐波注入法 

分 类 号：TM464[电气工程—电器]