Reverse-blocking modular multilevel converter for battery energy storage systems
Xiaofeng YANG, Yao XUE, Bowei CHEN and 4 more
Journal of Modern Power Systems and Clean Energy · 2017
doi:10.1007/s40565-017-0300-5 (opens in a new tab)
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Abstract
Abstract Energy storage systems with multilevel converters play an important role in modern electric power systems with large-scale renewable energy integration. This paper proposes a reverse-blocking modular multilevel converter for a battery energy storage system (RB-MMC-BESS). Besides integrating distributed low-voltage batteries to medium or high voltage grids, with the inherited advantages of traditional MMCs, the RB-MMC-BESS also provides improved DC fault handling capability. This paper analyzes such a new converter configuration and its operating principles. Control algorithms are developed for AC side power control and the balancing of battery state of charge. The blocking mechanism to manage a DC pole-to-pole fault analyzed in depth. Comprehensive simulation results validate both the feasibility of the RB-MMC-BESS topology and the effectiveness of the control and fault handling strategies.
Abstract licence: CC BY-NC-ND
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