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首页> 外文期刊>Power Electronics, IET >Parallel inductor multilevel current source inverter with energy-recovery scheme for inductor currents balancing
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Parallel inductor multilevel current source inverter with energy-recovery scheme for inductor currents balancing

机译：具有能量回收方案的并联电感器多电平电流源逆变器，用于电感器电流平衡

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摘要

Current source inverters (CSIs) have increasingly become popular because of their inherent advantages over voltage source inverter. In a single phase system, the operation of multilevel current source inverter (MCSI) requires large and bulky DC link inductor and the employment of switching state redundancy to balance the inductor currents limit the advantages of MCSI. This study proposed a new configuration for parallel MCSI. The proposed energy-recovery scheme provides a major path to release its stored energy in order to balance the sharing inductor currents and introduces a novel single state switching technique for the generation of MCSI output current. In addition, a chopper circuit with smaller inductor size is employed to replace the large and bulky input DC link inductor. An integration of five-level MCSI and a chopper based DC-current source with energy recovery scheme circuits produce a five-level MCSI with a simple converter structure. The performance of the proposed MCSI is analysed through MATLAB and is verified by constructing a prototype. The results demonstrate that the proposed circuit with the balancing inductor current scheme significantly reduces the input DC link inductor size, eliminate the control complexity in balancing the inductor currents and has excellent sharing inductor current characteristics.
机译：电流源逆变器（CSI）由于其相对于电压源逆变器的固有优势而变得越来越流行。在单相系统中，多级电流源逆变器（MCSI）的操作需要大而笨重的DC链路电感器，并且采用开关状态冗余来平衡电感器电流限制了MCSI的优势。这项研究提出了并行MCSI的新配置。提出的能量回收方案提供了释放其存储的能量的主要途径，以平衡共享的电感器电流，并引入了一种新颖的单状态切换技术来生成MCSI输出电流。另外，采用了具有较小电感器尺寸的斩波器电路来代替大而笨重的输入直流母线电感器。五级MCSI和基于斩波器的直流电流源与能量回收方案电路的集成产生了具有简单转换器结构的五级MCSI。通过MATLAB分析了提出的MCSI的性能，并通过构建原型对其进行了验证。结果表明，采用平衡电感器电流方案的拟议电路显着减小了输入直流环节电感器的尺寸，消除了平衡电感器电流时的控制复杂性，并具有出色的共享电感器电流特性。

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