Proposal of a Time-Domain Platform for Short-Circuit Protection Analysis in Rapid Transit Train DC Auxiliary Systems

This paper presents the development of detailed simulation models to study short-circuit protection of on-board dc auxiliary systems in a rapid transit train. As the investigation of protection solutions during the testing phases is costly, it is necessary to perform detailed protection analysis ear...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2016-11, Vol.52 (6), p.5295-5304
Main Authors: Berger, Maxime, Lavertu, Carl, Kocar, Ilhan, Mahseredjian, Jean
Format: Article
Language:English
Subjects:
Batteries
Circuit breakers
Circuit faults
Circuit protection
Converters
Cost analysis
dc circuit breakers
dc power systems
Electromagnetic Transients Program (EMTP)
Fault currents
fault protection
Onboard equipment
Rail transportation
railway safety
Rapid transit systems
Short circuits
Tolerances
Vehicles
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Summary:This paper presents the development of detailed simulation models to study short-circuit protection of on-board dc auxiliary systems in a rapid transit train. As the investigation of protection solutions during the testing phases is costly, it is necessary to perform detailed protection analysis earlier in order to detect potential protection issues. This requires modeling the behavior of batteries, auxiliary converters, and the detection and arcing mechanisms of protection devices in detail, as shown in this paper. The protection device under consideration in this study is the molded-case circuit breakers (MCCBs) equipped with adjustable thermomagnetic trip unit which are widely used in the railway industry. To maintain battery system availability, they are selected, sized, and adjusted to avoid false tripping during emergency conditions. However, they must also be sensitive enough to detect the limited available fault current which is specific to rapid transit train dc auxiliary systems. Tolerances on the detection time of thermomagnetic units may be unacceptable as shown in this study. In order to overcome this problem, electronic trip unit assistance to conventional thermomagnetic-type MCCBs is proposed and the requirements for such a device are evaluated using the detailed simulation platform.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2016.2599480