Open-Switch and Open-Clamping Diode Fault Diagnosis for Single-Phase Five-Level Neutral-Point-Clamped Inverters

In this article, a fast and efficient open-circuit switch clamping diode fault diagnosis for neutral-point-clamped inverters is proposed. Multilevel converters employed in safety-critical applications should include fault-tolerant capability, where plays vital role. The proposed algorithm based on failure mode analysis, which logic-based approach. required signals measurements are available the healthy control system. Furthermore, component modeling, load parameters, complicated calculations not required. detection identification of faulty or carried out data such as switching pattern terminal voltage. Although switches more fragile than diodes, diodes also subjected to breakdown. Hence, it crucial achieve strategy. Moreover, procedure, voltage quantifier avoid any misdiagnosis arising from measurement errors drop circuit. simulation experimental results presented validate effectiveness