A New Approach for Current Sensor Fault Diagnosis in PMSG Drives for Wind Energy Conversion Systems

Fault diagnosis is a mandatory feature in fault-tolerant systems, since it provides the information necessary for the fault isolation and system reconfiguration. Recently, permanent-magnet synchronous generator (PMSG) drives have achieved prominence in wind energy conversion systems (WECSs), due to...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2014-03, Vol.50 (2), p.1206-1214
Main Authors: Freire, Nuno M. A., Estima, Jorge O., Cardoso, Antonio J. Marques
Format: Article
Language:English
Subjects:
Circuit faults
Condition monitoring
Control systems
Current measurement
Fault detection
Fault diagnosis
Fault tolerance
Fault tolerant systems
wind power generation
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Summary:Fault diagnosis is a mandatory feature in fault-tolerant systems, since it provides the information necessary for the fault isolation and system reconfiguration. Recently, permanent-magnet synchronous generator (PMSG) drives have achieved prominence in wind energy conversion systems (WECSs), due to their reliability and availability. In this paper, a new approach is proposed for current sensor fault diagnosis in PMSG drives for WECSs. As opposed to the conventional state-observer-based methods for current sensor faults, which require a system model and the respective parameters, the proposed diagnostic method uses the measured phase currents only. Thus, its main merits are simplicity and reliability in the diagnosis, making it suitable for real-time implementation and to trigger remedial procedures. In addition, current sensor and open-circuit faults can be distinguished, and the affected phase is effectively identified in both cases. The proposed diagnostic technique is applied to the two power converters of a conventional back-to-back topology, and its performance is analyzed by means of several experimental results.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2013.2271992