FAULT-TOLERANT CONTROL STRATEGIES FOR POWER ELECTRONICS CONVERTERS IN RENEWABLE ENERGY SYSTEMS

Abstract

Power electronics converters are critical components in renewable energy systems, enabling efficient energy conversion from solar, wind, and hybrid sources. However, these converters are prone to faults such as switch failures, short circuits, open-circuit faults, and thermal stress, which can lead to system downtime and reduced energy efficiency. This paper presents a fault-tolerant control (FTC) framework for power electronics converters in renewable energy systems, combining real-time fault detection, diagnosis, and adaptive control strategies. The proposed approach integrates model-based fault detection, observer techniques, and AIdriven predictive control to maintain system performance under fault conditions. Simulation results demonstrate improved reliability, reduced downtime, and enhanced efficiency compared to conventional faulthandling approaches. The framework ensures robust operation for large-scale renewable energy integration into smart grids.