Different Multilevel Converter Topologies for Battery Energy Storage Application

Different Multilevel Converter Topologies for Battery Energy Storage Application

Five multilevel converter topologies of NPC, Z-source, QuasiZ-source, Cascaded, and Capacitor clamped have been investigated and compared in terms of their THD, efficiency, number of required semiconductors and other important characteristics in order to find the most suitable topology, which is appropriate to use in Battery Energy Storage Systems (BESS) applications. The results prove that cascaded topology has better performance in comparison with other types. This topology was chosen for three reasons. First, the efficiency and reliability studies were conducted, and the CMLI was found to be the most efficient and reliable topology with minimum amount of power loss compared to other topologies. Second, it subdivides the battery string and increases the high voltage functionality. Finally, capacitor volume, cost and THD studies were again confirmed the effectiveness of this topology in battery energy storage systems.

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Reference:
A. Delavari, I. Kamwa, A. Zabihinejad, "Different Multilevel Converter Topologies for Battery Energy Storage Application," THE 30TH ANNUAL IEEE CANADIAN CONFERENCE ON ELECTRICAL AND COMPUTER ENGINEERING (CCECE 2017).
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