集成一个单一的z源网络与一个模块化的多电平转换器升压

F. Khera, C. Klumpner, P. Wheeler
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引用次数: 1

摘要

本文提出将z源网络与模块化多电平变换器(MMC)集成,为降压变换器增加升压能力。为了限制复杂性的增加,所提出的z源模块化多电平转换器使用单个z源网络,该网络在直流输入源的相应终端和MMC的直流链路终端之间互连。作者先前提出了一种准Z源MMC (qZS-MMC)的调制技术,称为减少插入单元(RICs) PWM,但这两种准Z源网络需要大尺寸的电感器。与qZS-MMC相比,采用源MMC的RICs方案具有更大的优势。本文通过对相关电流和电压波形的分析,给出了采用RICs方案的Z源MMC的工作原理和关键设计参数的推导。仿真结果验证了该拓扑的有效性,并展示了该拓扑良好的波形性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Integrating a Single Z-Source Network with a Modular Multilevel Converter for Voltage Boosting
This paper proposes the integration of a Z-source network with the modular multilevel converter (MMC) to add voltage boosting capability to a voltage step down converter. To limit the increase in complexity, the proposed Z-source modular multilevel converter uses a single Z-source network that is interconnected between the corresponding terminals of the DC- input source and the DC-link terminals of the MMC. The authors previously presented a modulation technique for quasi Z-source MMC (qZS-MMC) referred to as the reduced inserted cells (RICs) PWM but a large size inductor for the two quasi Z- source networks were needed. This paper shows that utilising the RICs scheme with the-source MMC is more advantageous compared with the qZS-MMC. The operation principle of the Z- source MMC using RICs scheme and the derivation of key design parameters is presented in this paper by analysing the relevant current and voltage waveforms. The simulation results verify the operation and showcase the excellent waveform performance of the proposed topology.
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