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Communication Dans Un Congrès Année : 2020

Scalable Solid State Transformers (SSTs) for DC railway substations

Résumé

DC railway substations may require different rated powers, input AC voltages and output DC voltages. Hence, current substation technology needs to be adapted to each application. To overcome this issue, the Solid State Transformer (SST) topology, which is inherently modular, can address the different applications with a single elementary power electronic building block (PEBB). In this paper, a methodology is proposed to define the optimal rated power and number of PEBBs. It results in a 94 kW PEBB with a 3.6 kV intermediate DC bus which leads to an oversizing ratio regarding normal operation comprised between 3.38 and 5.7 and a number of PEBBs per MW comprised between 36 and 60. A topology of the PEBB with a reconfigurable secondary bridge to address both 750 V urban and 1.5 kV suburban applications is also proposed. The power losses are similar to those obtained with dedicated secondary inverters sized specifically for either urban or suburban applications.
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Dates et versions

hal-03195539 , version 1 (11-04-2021)

Identifiants

  • HAL Id : hal-03195539 , version 1

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Caroline Stackler, Diego Velazco, Francois Wallart, Piotr Dworakowski. Scalable Solid State Transformers (SSTs) for DC railway substations. PCIM International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Jul 2020, Nuremberg (on line), Germany. ⟨hal-03195539⟩
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