A Real-Time Fault-Tolerant Control Approach to Ensure the Resiliency of a Self-Healing Multilevel Converter

Ensuring service continuity in safety critical applications is crucial. In some of these applications, multilevel converters play a vital role. this regard, research work presents self-healing fault-tolerant control approach to ensure the resiliency neutral-point clamped converter when semiconductor component encounters an open circuit fault. The defective can be power switch or clamping diode. By applying proposed real-time fault-tolerance control, rated output voltage and current are restored during post-fault operation. Furthermore, total harmonic distortion value application real time does not increase compared with that healthy Since realization strategy require any bidirectional switch, fast transition between operation accomplished. Moreover, structure case fault event anti-parallel diodes, something which has been overlooked previously conducted works.