A reduced representation of 2×25 kV electrical systems for high-speed railways

Pilo, E.; Rouco, L.; Fernández, Antonio

doi:10.1109/rrcon.2003.1204665

Cited by 19 publications

(16 citation statements)

References 5 publications

(2 reference statements)

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“…That technology is called AT (auto transformer) for AC railways. AT catenary systems (Hill, 1994;Bülund et al, 2004;Pilo et al, 2003;Glover et al, 1984) are sometimes also called dual systems or 2·V L kV systems (where V L denotes the voltage level) (Pilo et al, 2003). There also exist powerelectronics based solutions with dual voltage contact line systems for DC railways (Ladoux et al, 2006).…”

Section: How To Dimension the Railway Power Supply Systemmentioning

confidence: 99%

“…a comparatively simple) feeding system. The mid circuit diagram illustrates a dual-voltage (Pilo et al, 2003) system. The lower circuit diagram illustrates a system fed through converters.…”

Section: Sectioning Of Catenaries -An Obstacle For Energy Efficient Omentioning

confidence: 99%

“…In line with reducing amperage, electromagnetic interference of line-side equipment and other installations is decreasing, which had otherwise made AT or BT systems necessary. The term dual-voltage system used in Figure 5, means in the case of AC railways AT systems (Hill, 1994;Bülund et al, 2004;Pilo et al, 2003;Glover et al, 1984). In the case of DC catenaries, dual-voltage systems also exist (Ladoux et al, 2006) which are solutions based on power-electronics.…”

Section: Robustness Redundancy and Protectionmentioning

confidence: 99%

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Use of converters for feeding of AC railways for all frequencies

Abrahamsson¹,

Schütte²,

Östlund³

2012

Energy for Sustainable Development

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Railways are the most energy-efficient land-based mode of transport, and electrification is the most energy-efficient way to power the trains. There are many existing solutions to supply the trains with electricity. Regardless of which particular technology is chosen, it is beneficial to interconnect the public power grids to grids supplying power to the railways. This paper shows that the most efficient, flexible, and gentle-for-the-public-grid way of doing that is through powerelectronics-based power converters. Converters offer great benefits regardless of whether the overhead contact lines are of DC-type or AC type, and regardless of the AC grid frequency. This paper presents neither new theory nor new experimental results. Based on already available information, this paper presents logical arguments leading to this conclusion from collected facts. Over time what used to be advanced and high-cost equipment earlier can nowadays be purchased at reasonable cost. It is obvious that for most electrically-fed railways, the use of modern power converters is attractive. Where the individual trains are high consumers of energy, the railway gradients are substantial, and the public grids feeding the railway are weak, the use of converters would be technically desirable, if not necessary for electrification.It is expected that more high-speed railways will be built, and more existing railways will be electrified in the foreseeable future. This paper could provide some insights to infrastructure owners and decision makers in railway administrations about value additions that converter-fed electric railways would provide.

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Section: How To Dimension the Railway Power Supply Systemmentioning

confidence: 99%

Section: Sectioning Of Catenaries -An Obstacle For Energy Efficient Omentioning

confidence: 99%

Section: Robustness Redundancy and Protectionmentioning

confidence: 99%

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Use of converters for feeding of AC railways for all frequencies

Abrahamsson¹,

Schütte²,

Östlund³

2012

Energy for Sustainable Development

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“…This fact reduces the current needed to supply the power required by highspeed trains [1]. In consequence, the length of the sections can be greater and the number of TS lower.…”

Section: Introductionmentioning

confidence: 99%

Influence of high-speed train power consumption on a novel ground fault identification method for 2 × 25 kv railway power supply systems

Serrano¹,

Platero²,

López-Toledo³

et al. 2017

Int. J. TDI

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Nowadays, the most commonly used configuration to supply high-speed trains is 2 × 25 kV power supply system. The location of ground faults in 2 × 25 kV power supply systems is a difficult task, since the use of distance protection relays to localize ground faults positions doesn't work properly as the relation between the distance and the impedance seen by the distance protection relays is not linear and therefore the location is not accurate enough. A new simple and economical method to identify the subsection between autotransformers (ATS) and the conductor (positive or negative) where the ground fault is happening, based on the comparison of the angle between the current and the voltage of the positive terminal in each autotransformer, was developed recently. Consequently, after the identification of the subsection and the conductor with the ground fault, only this subsection where the ground fault is present, will be quickly removed from service, with the minimum effect on rail traffic. The high-speed trains demand a power about 12-16 MW, hence a significant current flow through the conductors of the 2 × 25 kV power system. This paper presents a study about the influence of the current consumed by the high-speed trains on this novel ground fault identification method. The operation of the method is correct even with the high-speed train currents in the section with a ground fault. This fact has been validated through numerous computer simulations, obtaining excellent results.

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“…Typical values for cell lengths are 10-15 km. It has been proven that bi-voltage systems can be represented as if they were mo-voltage [5,6]. For that reason, in this paper only mono-voltage systems are considered in the discussions, without loss of generality.…”

Section: Introductionmentioning

confidence: 99%

Stochastic traffic generator for Monte Carlo load flow simulation

Fuente¹,

Jiménez-Octavio²,

Pecharromán³

et al. 2011

Computational Methods and Experimental Measurements XV

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This paper presents a stochastic traffic generator in which (i) the driving manner is assumed to be stochastic, (ii) random unexpected stops are considered and (iii) the stop time in the stations is also supposed to be stochastic. This simulation tool provides a large number of different driving scenarios to be used for a Monte Carlo load flow analysis. Traffic simulations algorithms are described in detail. Reference to a section of the Madrid-Barcelona high-speed line illustrates the potential of such a tool.

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A reduced representation of 2×25 kV electrical systems for high-speed railways

Cited by 19 publications

References 5 publications

Use of converters for feeding of AC railways for all frequencies

Use of converters for feeding of AC railways for all frequencies

Influence of high-speed train power consumption on a novel ground fault identification method for 2 × 25 kv railway power supply systems

Stochastic traffic generator for Monte Carlo load flow simulation

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