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Three‐phase two‐leg buck‐boost DC‐AC inverter with differential power processor unit
International Journal of Circuit Theory and Applications ( IF 2.3 ) Pub Date : 2020-08-07 , DOI: 10.1002/cta.2859
Ahmed A. Hossam‐Eldin 1 , Ahmed A. Elserougi 1 , Ahmed K. Abdelsalam 2 , Abdelrahman M. Farghly 1
Affiliation  

Renewable energy sources (RESs) need power‐electronics‐based converters to deliver the acquired power to the grid. Those converters should provide voltage‐bucking/boosting capabilities to accommodate various grid modes specially for three‐phase distorted commonly unbalanced distribution utility networks. Several power electronic‐based converters have been elaborated to fulfill this high‐demand market. Single‐stage converters are the most dominant in the market where the current source inverters (CSIs), impedance source inverters (ZSIs), and boost inverters are the high‐end candidates. The aspects of cost, footprint, and minimal numbers of active switches, in addition to simplified controllability, build the main challenges that face the evolution of robust renewable energy‐associated grid‐tied converters. This paper presents a novel three‐phase differential‐mode buck‐boost inverter based on two bidirectional buck‐boost DC/DC converters and one differential power processor (DPP) unit. The proposed topology is a single‐stage DC/AC converter offering bucking/boosting capability, with reduced hardware requirements. The proposed topology features a simplified control methodology in addition to reduced size and cost of the hardware setup which makes it more suitable for grid‐tied renewable energy applications. The operation principles, small‐signal model, and control strategy of the proposed topology are also illustrated. Simulation and experimental results are presented in details to verify the topology‐enhanced performance under various operating conditions. The deducted results elucidate the viability of the proposed configuration alongside with the claimed merits.

中文翻译:

具有差动电源处理器单元的三相两臂降压-升压DC-AC逆变器

可再生能源(RES)需要基于电力电子的转换器,以将获取的电力输送到电网。这些转换器应提供降压/升压功能,以适应各种三相畸变,通常不平衡的配电网络的电网模式。为了满足这一高需求市场,已经设计了几种基于电力电子的转换器。单级转换器是市场上最主要的器件,其中电流源逆变器(CSI),阻抗源逆变器(ZSI)和升压逆变器是高端选择。除简化的可控性外,成本,占地面积和有源开关的最少数量等方面还构成了强大的可再生能源相关联的并网变流器发展所面临的主要挑战。本文介绍了一种新颖的三相差分模式降压-升压型逆变器,该逆变器基于两个双向降压-升压型DC / DC转换器和一个差分功率处理器(DPP)单元。拟议的拓扑是一种单级DC / AC转换器,具有降压/升压功能,并减少了硬件需求。除了减小了硬件设置的尺寸和成本外,拟议的拓扑还具有简化的控制方法,这使其更适合并网可再生能源应用。还说明了所提出拓扑的操作原理,小信号模型和控制策略。详细介绍了仿真和实验结果,以验证各种操作条件下的拓扑增强性能。
更新日期:2020-08-07
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