Performance analysis of a fault-tolerant multiport converter for hybrid standalone applications

This article presents the performance analysis of reconfigurable multiple-switch fault-tolerant multiport DC–DC converters for renewable-based hybrid standalone applications. Detailing various switch faults, two topologies have been studied, each accompanied by a thorough exploration of operating scenarios. While the first topology is capable of addressing faults occurring in single or multiple switches, it falls short of achieving complete fault tolerance. In order to address this limitation, a fully fault-tolerant topology has been introduced, specifically designed to manage all potential combinations of multiple switch faults. To verify the efficacy of the topologies across various operating scenarios, laboratory prototypes were developed and employed. The empirical findings from real-time testing of the reconfigurable fault-tolerant topologies guarantee regulated voltage with uninterrupted supply in both charging and discharging operations of the energy storage device. The performance of the topologies related to stress, loss, reliability, and cost has also been investigated. This article also presents a comparative analysis of reconfigurable fault-tolerant converters with similar topologies.