ew 18: e1

Research Article

Optimizing the train-catenary electrical interface in AC railways through dynamic control reconfiguration

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  • @ARTICLE{10.4108/eai.13-7-2018.160979,
        author={Ant\^{o}nio Martins and V\^{\i}tor  Morais and Carlos  Ramos and Adriano  Carvalho and Jo\"{a}o  Afonso},
        title={Optimizing the train-catenary electrical interface in AC railways through dynamic control reconfiguration},
        journal={EAI Endorsed Transactions on Energy Web: Online First},
        volume={},
        number={},
        publisher={EAI},
        journal_a={EW},
        year={2019},
        month={10},
        keywords={AC-DC converters, Electric railways, Interleaved converters, Resonance, Railway systems},
        doi={10.4108/eai.13-7-2018.160979}
    }
    
  • António Martins
    Vítor Morais
    Carlos Ramos
    Adriano Carvalho
    João Afonso
    Year: 2019
    Optimizing the train-catenary electrical interface in AC railways through dynamic control reconfiguration
    EW
    EAI
    DOI: 10.4108/eai.13-7-2018.160979
António Martins1,*, Vítor Morais1, Carlos Ramos1, Adriano Carvalho1, João Afonso2
  • 1: SYSTEC Research Centre, Faculty of Engineering, University of Porto, Rua dr Roberto Frias, 4200-465, Porto, Portugal
  • 2: Centro ALGORITMI, University of Minho, Campus de Azurém, Guimarães, Portugal
*Contact email: ajm@fe.up.pt

Abstract

The power supply architecture of most AC electric railway vehicles is constituted by transformers and catenaries at increasingly high power levels. Inside the vehicles, the interface between the catenary and the DC-bus of the traction motors is based on a transformer and power electronics converters. A large part of these are AC-DC four quadrant converters that operate in parallel at relatively small switching frequencies. However, the use of the interleaving principle allows reaching a low harmonic distortion of the catenary current and imposing specific harmonic ranges in this current. Nevertheless, the current is not a pure sinusoidal wave and its harmonics can excite unwanted resonances due to the combined effect of the catenary distributed parameters, the substation equivalent impedance and the current frequency spectrum. This paper analyses this phenomenon and proposes a control strategy capable of minimizing the resonance effects in two different power supply architectures.