Medium Voltage Large-Scale Grid-Connected Photovoltaic Systems Using Cascaded H-Bridge and Modular Multilevel Converters: A Review

IEEE Access

Saad Mekhilef¹  Ahmed Ibrahim Elsanabary¹  Georgios Konstantinou²  Christopher David Townsend³  Mehdi Seyedmahmoudian⁴  Alex Stojcevski⁴ 

[1] Department of Electrical Engineering, Power Electronics and Renewable Energy Research Laboratory, University of Malaya, Kuala Lumpur, Malaysia;School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia;School of Electrical, Electronic and Computer Engineering, The University of Western Australia, Crawley, WA, Australia;School of Software and Electrical Engineering, Swinburne University of Technology, Melbourne, VIC, Australia;

关键词: Multilevel converters;    PV systems;    modularity;    balancing strategies;    grid;   

DOI  :  10.1109/ACCESS.2020.3044882

来源: DOAJ

【 摘 要 】

Medium-voltage (MV) multilevel converters are considered a promising solution for large scale photovoltaic (PV) systems to meet the rapid energy demand. This article focuses on reviewing the different structures and the technical challenges of modular multilevel topologies and their submodule circuit design for PV applications. The unique structure of the converter's submodule provides modularity, independent control of maximum power point tracking (MPPT), galvanic isolation, etc. Different submodule circuits and MPPT methods to efficiently extract the PV power are reviewed. The integration of the multilevel converters to PV systems suffers unbalanced power generation during partial PV shading conditions. Several balancing strategies to solve this problem are presented and compared to give a better understanding of the balancing ranges and capabilities of each strategy. In addition, the paper discusses recent research advancements, and possible future directions of MV converters-based large-scale PV systems for grid integration.

【 授权许可】

Unknown