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This paper discusses the design, implementation, experimental validation and performances of a FPGA-based real time power converter failure diagnosis for three-leg fault tolerant converter topologies used in Wind Energy Conversion Systems (WECS). The developed approach minimizes the time interval between the fault occurrence and its diagnosis. We demonstrated the possibility to detect a faulty switch in less than 10 µs by using a diagnosis simultaneously based on a "time criterion" and a "voltage criterion". To attain such a short detection time, a FPGA (Field Programmable Gate Array) fully digital implementation is used. The performances of the proposed FPGA-based fault detection method are evaluated for a new fault tolerant back to back converter topology suited for WECS with Doubly Fed Induction Generator (DFIG). We examine the failure diagnosis method and the response of the WECS when one of the power switches of the fault tolerant back to back converter is faulty. The experimental failure diagnosis implementation based on "FPGA in the loop" hardware prototyping verifies the performances of the fault tolerant WECS with DFIG.

. (2013) 'Open-and short-circuit switch fault diagnosis for nonisolated dcdc converters using eld programmable gate array.', IEEE transactions on industrial electronics., 60 (9). pp. 4136-4146. Further information on publisher's website: Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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