Fault detection and localization for T-Type Converter

Abstract

In this paper, an Open-circuit switch fault diagnosis method for a five-level H-Bridge T-type converter is presented. The proposed fault detection method and the fault localization algorithm are based on the switching patterns and the converter output voltage level observation. The proposed fault diagnosis approach is capable to detect and localize an open circuit fault for all switches. The proposed approach is validated by simulations in Matlab Simulink and SimPowerSystem toolbox environments.

Switch Fault Detection and Localization for T-Type Converter

“…This paper is an extended version of the conference paper [32] that first introduced the fault diagnosis method for a fivelevel H-Bridge T-Type (5L HB T-Type) converter. Because of the numerous switches that are used in this topology, it is particularly vulnerable to switch faults.…”

“…When an OCF is declared, the proposed FLA activates the localization process, as well as the identification of the faulty switch, which will be detailed in the following. In [32] the principle parts of the proposed method are presented and validated only with simulation results. In this paper, the OCF diagnosis method is verified and validated by selected experimental results.…”