학술논문
Battery Fault Tolerance of Modular Multilevel Converter-Based Battery Energy Storage Systems with Redundant Submodules
Document Type
Conference
Author
Source
IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society Industrial Electronics Society (IECON), 2021 47th Annual Conference of the IEEE. :1-6 Oct, 2021
Subject
Language
ISSN
2577-1647
Abstract
In a modular multilevel converter (MMC) based battery energy storage system (BESS), a fault tolerant design ensures uninterrupted operation of the MMC when a given number of submodules (SMs) have faulty batteries or no batteries. This paper quantitatively investigates the fault tolerance improvement in MMC-based BESSs with different numbers of redundant SMs, which is commonly practiced to improve the fault tolerance in modular converter topologies. Simulation results are obtained to verify the proposed analysis. The presented analysis provides guidelines for designers to choose an appropriate number of redundant SMs to achieve a desired fault tolerance.