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DC-Link Voltage and Catenary Current Sensors Fault Reconstruction for Railway Traction Drives

Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate-Mondragón, Spain
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Sensors 2018, 18(7), 1998; https://doi.org/10.3390/s18071998
Received: 28 May 2018 / Revised: 13 June 2018 / Accepted: 21 June 2018 / Published: 22 June 2018
(This article belongs to the Special Issue Sensors for Fault Detection)
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Abstract

Due to the importance of sensors in control strategy and safety, early detection of faults in sensors has become a key point to improve the availability of railway traction drives. The presented sensor fault reconstruction is based on sliding mode observers and equivalent injection signals, and it allows detecting defective sensors and isolating faults. Moreover, the severity of faults is provided. The proposed on-board fault reconstruction has been validated in a hardware-in-the-loop platform, composed of a real-time simulator and a commercial traction control unit for a tram. Low computational resources, robustness to measurement noise, and easiness to tune are the main requirements for industrial acceptance. As railway applications are not safety-critical systems, compared to aerospace applications, a fault evaluation procedure is proposed, since there is enough time to perform diagnostic tasks. This procedure analyses the fault reconstruction in the steady state, delaying the decision-making in some seconds, but minimising false detections. View Full-Text
Keywords: sensor fault diagnosis; fault detection and isolation; fault injection; railway traction drive; sliding mode observer sensor fault diagnosis; fault detection and isolation; fault injection; railway traction drive; sliding mode observer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Garramiola, F.; Poza, J.; Del Olmo, J.; Madina, P.; Almandoz, G. DC-Link Voltage and Catenary Current Sensors Fault Reconstruction for Railway Traction Drives. Sensors 2018, 18, 1998.

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