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Fast power switch failure detection for fault tolerant voltage source inverters using FPGA

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3 Author(s)
Karimi, S. ; Groupe de Rech. en Electrotech. et Electron. de Nancy, Nancy Univ., Nancy ; Poure, P. ; Saadate, S.

The design, implementation, experimental validation and performances of a fully digital fast power switch failure detection and compensation for fault-tolerant voltage source inverters (VSIs) are discussed. The approach introduced minimises the time interval between the fault occurrence and its diagnosis. The possibility to detect a faulty switch or driver of the VSI in less than 10 s by using simultaneously a time criterion and a voltage criterion is demonstrated. In order to attain this short detection time a field programmable gate array (FPGA) is used. The studied fault detection method is implemented using a FPGA and experimentally validated for a three-phase VSI used in shunt active filter case. The proposed method tested first by FPGA in the loop prototyping has been also validated through a fully experimental active power filter which confirms the satisfactory performances of the proposed approach. Moreover, the other feature introduced in this approach is that the control scheme and the fault-tolerant scheme are both programmed in only one FPGA.

Published in:

Power Electronics, IET  (Volume:2 ,  Issue: 4 )

Date of Publication:

July 2009

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