Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations

Reversible substations (RSs) permitting bidirectional power flows can recover the regenerative braking energy of trains in DC traction power supply systems (TPSSs), increasing the energy efficiency of railway systems. To predict their effects on system dynamics and energy savings, the paper develops...

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Main Authors: Fulin Fan, Yafang Li, Smail Ziani, Brian G. Stewart
Format: Article
Language:English
Published: Wiley 2024-01-01
Series:IET Electrical Systems in Transportation
Online Access:http://dx.doi.org/10.1049/2024/8279648
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author Fulin Fan
Yafang Li
Smail Ziani
Brian G. Stewart
author_facet Fulin Fan
Yafang Li
Smail Ziani
Brian G. Stewart
author_sort Fulin Fan
collection DOAJ
description Reversible substations (RSs) permitting bidirectional power flows can recover the regenerative braking energy of trains in DC traction power supply systems (TPSSs), increasing the energy efficiency of railway systems. To predict their effects on system dynamics and energy savings, the paper develops multiresolution models (MRMs) to simulate the RS roles with different fidelities. A high-resolution model for the transient simulation replicates a particular topology where a three-level voltage source inverter is connected to the secondary winding of an existing 12-pulse rectifier transformer and regulated to keep a constant DC voltage in the inverting mode. Furthermore, it can model the transient effects of pantograph-to-line arcing by inserting arc voltage profiles at the train’s input stage. To increase the computation speed in the long-term energy flow simulation, a low-resolution model simplifies the rectifiers into a series connection of a diode and a controlled voltage source depicting their nonlinear output characteristics and then places a DC voltage source in parallel to form a reverse path for braking power recovery. In addition, nonlinear conversion efficiencies are introduced to calculate energy flows across substations. The MRMs are tested based on a 1.5 kV DC TPSS and discussed alongside system dynamics under normal operation or pantograph arcing and the consistencies between different models. The RS using bidirectional voltage source converters only is additionally modelled to compare the technical performance of the two topologies in terms of system dynamics and energy efficiencies.
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spelling doaj-art-bb3b03438128489cacf46002fad476be2025-02-08T00:00:10ZengWileyIET Electrical Systems in Transportation2042-97462024-01-01202410.1049/2024/8279648Multiresolution Models of DC Traction Power Supply Systems With Reversible SubstationsFulin Fan0Yafang Li1Smail Ziani2Brian G. Stewart3School of Electrical Engineering and AutomationHitachi EnergyIRT RaileniumInstitute for Energy and EnvironmentReversible substations (RSs) permitting bidirectional power flows can recover the regenerative braking energy of trains in DC traction power supply systems (TPSSs), increasing the energy efficiency of railway systems. To predict their effects on system dynamics and energy savings, the paper develops multiresolution models (MRMs) to simulate the RS roles with different fidelities. A high-resolution model for the transient simulation replicates a particular topology where a three-level voltage source inverter is connected to the secondary winding of an existing 12-pulse rectifier transformer and regulated to keep a constant DC voltage in the inverting mode. Furthermore, it can model the transient effects of pantograph-to-line arcing by inserting arc voltage profiles at the train’s input stage. To increase the computation speed in the long-term energy flow simulation, a low-resolution model simplifies the rectifiers into a series connection of a diode and a controlled voltage source depicting their nonlinear output characteristics and then places a DC voltage source in parallel to form a reverse path for braking power recovery. In addition, nonlinear conversion efficiencies are introduced to calculate energy flows across substations. The MRMs are tested based on a 1.5 kV DC TPSS and discussed alongside system dynamics under normal operation or pantograph arcing and the consistencies between different models. The RS using bidirectional voltage source converters only is additionally modelled to compare the technical performance of the two topologies in terms of system dynamics and energy efficiencies.http://dx.doi.org/10.1049/2024/8279648
spellingShingle Fulin Fan
Yafang Li
Smail Ziani
Brian G. Stewart
Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations
IET Electrical Systems in Transportation
title Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations
title_full Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations
title_fullStr Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations
title_full_unstemmed Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations
title_short Multiresolution Models of DC Traction Power Supply Systems With Reversible Substations
title_sort multiresolution models of dc traction power supply systems with reversible substations
url http://dx.doi.org/10.1049/2024/8279648
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AT smailziani multiresolutionmodelsofdctractionpowersupplysystemswithreversiblesubstations
AT briangstewart multiresolutionmodelsofdctractionpowersupplysystemswithreversiblesubstations