This paper focuses on fault-tolerant control for a battery energy storage system based on a three-phase multilevel cascade PWM (pulse-width-modulation) converter with star configuration. It enables continuous operation and maintains SOC (state-of-charge) balancing of operating battery units even during the occurrence of a converter-cell or battery-unit failure. This enhances both system reliability and availability. A 200-V, 10-kW, 3.6-kWh laboratory system combining a three-phase cascade PWM converter with nine NiMH (Nickel-metal-hydride) battery units is designed, constructed, and tested to verify the validity and effectiveness of the proposed fault-tolerant control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.