DC-side-fault-tolerant Control of a Battery-Supercapacitor Hybrid Energy Storage System Based on Cascaded Multilevel Converter and Auxiliary Power Loop

This article proposes a fault-tolerant control method for the battery-supercapacitor (SC) hybrid energy storage system (HESS) based on the cascaded multilevel converter during active dc-side failure (ADCF). When ADCF occurs, the magnitude of the output voltage will be seriously affected because of the decline of the dc-side voltage. Consequently, the system cannot operate normally. To tackle this ...