Systematized short-circuit analysis of a 2×25 kV electric traction network

Chen, Tsai-Hsiang; Hsu, Ya-Chen

doi:10.1016/s0378-7796(98)00058-3

Cited by 16 publications

(11 citation statements)

References 4 publications

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“…Furthermore, in the traditional 1 × 25 kV power supply systems, most faults are caused by outdoor short circuits between the catenary and ground, while in the 2 × 25 kV power systems most of them are caused by outdoor short circuits between the catenary or the feeder to ground [8,9]. However, the detection and location of ground faults in the 2 × 25 kV lines are much more complex than in 1 × 25 kV lines, mainly because of the use of autotransformers [10] in the ATS substations to which the catenary, feeder and rails are connected.…”

Section: Introductionmentioning

confidence: 99%

A Novel Ground Fault Identification Method for 2 × 5 kV Railway Power Supply Systems

et al. 2015

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Abstract:The location of ground faults in railway electric lines in 2 × 5 kV railway power supply systems is a difficult task. In both 1 × 25 kV and transmission power systems it is common practice to use distance protection relays to clear ground faults and localize their positions. However, in the particular case of this 2 × 25 kV system, due to the widespread use of autotransformers, 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. This paper presents a simple and economical method to identify the subsection between autotransformers and the conductor (catenary or feeder) where the ground fault is happening. This method is based on the comparison of the angle between the current and the voltage of the positive terminal in each autotransformer. Consequently, after the identification of the subsection and the conductor with the ground defect, only the subsection where the ground fault is present will be quickly removed from service, with the minimum effect on rail traffic. This method has been validated through computer simulations and laboratory tests with positive results.

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Section: Introductionmentioning

confidence: 99%

A Novel Ground Fault Identification Method for 2 × 5 kV Railway Power Supply Systems

et al. 2015

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“…As EMU startup time is short, in the vast majority of circumstances, only one EMU is starting in all parallel AT TPSS. If the maximum increment current of the EMU is m I  at the AT subsection as Figure 6 shows, with growth of distance, D , derived from Equation 7, the distribution of the maximum increment current at the EMU running subsection can be presented as Equations (9) and (10). Under normal operation, the increment current of EMUs is not very large.…”

Section: Theoretical Analysis Of the Current And Voltage Distributionmentioning

confidence: 99%

“…However, compared to 1 × 25 kV TPSS, the structure of all parallel AT TPSS becomes more complex and is vulnerable to damage by natural or human factors [9]. The fault types are a series of short circuits between catenary and ground (C-G short circuit fault), between the negative feeder and ground (NF-G short circuit fault), and between catenary and negative feeder (C-NF short circuit fault) [10,11]. From the fault resistance, the fault types are divided into low transition resistance faults and high transition resistance faults.…”

Section: Introductionmentioning

confidence: 99%

A New Hybrid Fault Identification Method Based on Multiterminals Synchronous Measure Information for All Parallel at Traction Power Supply System

Wang

Chen

et al. 2018

Energies

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The all parallel autotransformer (AT) traction power supply system (TPSS) including several subsections is widely used for high-speed railways. Unfortunately, any fault of catenary and negative feeder will cause all subsections power interruption in the whole system. Moreover, due to the nonlinear relationship between the distance and impedance as well as the symmetry of the system, conventional distance protection schemes fail to identify the fault subsection and the fault types. In this paper, a novel segmental power supply scheme is presented, which can switch the catenary and negative feeder at each AT subsection on and off independently. Based on the theoretical analysis of the electrical characteristics of the traction power network, multiterminals synchronous information is applied and a hybrid fault identification method is proposed, which can accurately identify the fault subsection and fault type. Consequently, only the catenary or negative feeder at the fault subsection will be quickly removed from service without the effect on normal operation of other subsections. Therefore, the reliability of all parallel AT TPSS is improved considerably. This method was verified through simulation and laboratory experiments by the case studies.

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“…Sin embargo, los procesos de localización y eliminación de una falta eléctrica son mucho más complicados en los sistemas bifásicos más tierra, al estar unidos en cada subsección los tres conductores mediante autotransformadores [Chen y Hsu, 1998]. La localización de las faltas entre uno de los dos conductores, positivo o negativo y tierra, es el objetivo principal de esta tesis.…”

Section: Localización De Faltas a Tierra En Sistemas 1×25 Kvunclassified

“…Este patrón [Chen y Hsu, 1998] Por otro lado, la intensidad IA2, del autotransformador ATS2, crece en la segunda subsección, B, alcanzando su máximo en el km 20 que es donde se encuentra dicho autotransformador.…”

Section: Distribución Característica De Las Intensidades En Autotransunclassified

Localización de faltas a tierra en sistemas de electrificación ferroviaria para alta velocidad, alimentados en 2×25 kV (sistema bifásico con autotransformadores)

Álvarez¹

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Systematized short-circuit analysis of a 2×25 kV electric traction network

Cited by 16 publications

References 4 publications

A Novel Ground Fault Identification Method for 2 × 5 kV Railway Power Supply Systems

A Novel Ground Fault Identification Method for 2 × 5 kV Railway Power Supply Systems

A New Hybrid Fault Identification Method Based on Multiterminals Synchronous Measure Information for All Parallel at Traction Power Supply System

Localización de faltas a tierra en sistemas de electrificación ferroviaria para alta velocidad, alimentados en 2×25 kV (sistema bifásico con autotransformadores)

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