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World Journal of Engineering Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

An Official Publication of Society for Advance Healthcare Research (Reg. No. : 01/01/01/31674/16)

ISSN 2454-695X

Impact Factor : 7.029

ICV : 79.45

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Indexing

Abstract

FAULT TOLERANT AND RECONFIGURATION OF MODULATION USING CASCADED H-BRIDGE CONVERTER

P. Iraianbu*, T. Santhosh, T. Soundararajan and P. Sakthivel

ABSTRACT

In this paper, according to the switching states the failure situations can be classified into two types as follows failure type I and failure type II(F1 and F2) of the multilevel inverters are discussed and the gate signals can be reconfigured according to the failure modes. The damaged power cell is bypassed and PWM pattern is adjusted such that the inverter is able to continue to produce a three-phase balanced line-to-line voltage. The reconfiguration method is discussed for discontinuous pulse width modulation (DPWM). This reconfiguration method can be extended for other carrier based method also. Balanced line-to-line voltage will be achieved with the proposed method when device failure occurs. Total harmonic distortion of DPWM is compared with normal operation.

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