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Modelling and simulation of regeneration in AC traction propulsion system of electrified railway
journal contribution
posted on 2015-12-01, 00:00 authored by Mehran Shafighy, Sui Yang KhooSui Yang Khoo, Abbas KouzaniAbbas KouzaniThis paper presents a robust model and its simulation to investigate the performance of an AC propulsion system in a rail vehicle for directly returning the regenerative braking power to the feeder substation of an AC traction network. This direct returning method can be an efficient approach for energy recovery if the regenerative braking is reliably applied. However, it is shown that this method can cause undesired voltage fluctuations if the regenerative braking regime or braking location of the rail vehicle change. The load torque on the traction motor (TM) is precisely modelled when pure electrical braking is applied. Different states of the direct torque controlled inverter are modelled when the TM regenerates. A circuit model for the utility grid, load impedances and the traction network is developed to evaluate the network receptivity against the regenerated power. The dynamics of the electromagnetic torque and the fluctuations of the DC-link voltage are investigated for two operational conditions: changes on the regenerative braking regime and changes on the rail vehicle braking location. The results justify how the DC-link voltage dramatically fluctuates with variations of the rail vehicle's operation conditions, whereas the electromagnetic torque is maintained on optimum rates.
History
Journal
IET electrical systems in transportationVolume
5Issue
4Pagination
145 - 155Publisher
Institution of Engineering and TechnologyLocation
Stevenage, Eng.Publisher DOI
ISSN
2042-9738eISSN
2042-9746Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2015, IETUsage metrics
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