A High Step-Up Interleaved p-Type Nonisolated DC–DC Converter With Reconfiguration Capability

This article introduces a high step-up interleaved p-type nonisolated dc–dc converter that achieves fault-tolerant operation without relying on redundant switches. The proposed converter design offers several advantages, including high voltage gain, improved efficiency, lower voltage stress on components, lower peak-to-peak input current, mitigates voltage oscillations across switches, and inherent common grounding making it suitable for a wide range of applications. The converter ensures uniform current sharing across its inductors and improves its reliability. Its scalable nature allows for the addition of stages to meet higher voltage and power requirements. The controller is designed to reduce transients during steady state and fault conditions to ensure stable operation. To achieve fault tolerance without extra switches, the design integrates a fuse-MOSFET combination for effective short-circuit protection. A 400-W prototype has been designed, built, and tested successfully demonstrating the converter functionality under normal and fault conditions.