Fault Recognition and Reconfiguration Operation for Three-Phase Five-level Cascaded H-Bridge Multilevel Inverter

Allerton Press 2022-12-29

The paper presents the fault recognition and reconfiguration technique for three-phase five-level cascaded H-bridge multilevel inverter operation. The multilevel inverter operation is carried out by using space vector modulation technique. Open switch fault is very frequent in multilevel inverter, which is located using fuzzy logic whereas the fault reconfiguration is done by adding one auxiliary inverter module with the main multilevel inverter which operates in a faulty condition and regulates the output voltage. The operation of auxiliary inverter module is according to the switching state provided which is based on a fault that occurs in a particular switch. In this method continuous operation of the main multilevel inverter is possible even in the fault condition with only one or two voltage level missed at the output. The continuous operation of multilevel inverter with reduced THD is achieved without using filter which is affirmed by MATLAB® simulation.

Cascaded H-bridge Multi-level inverter; space-vector modulation technique; fault recognition; fuzzy logic; fault reconfiguration; auxiliary inverter module; info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion

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Radioelectronics and Communications Systems

UANTU oai:ojs.journals.uran.ua:article/270749
1360232784

NATIONAL TECH UNIV OF UKRAINE
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