Comprehensive Revisions on Fault-Location Algorithm Suitable for Dedicated Passenger Line of High-Speed Electrified Railway

Wang, Chuanqi; Yin, Xianggen

doi:10.1109/tpwrd.2012.2207270

Cited by 22 publications

(18 citation statements)

References 1 publication

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“…The complexity of the detection and location of ground faults in the 2 × 25 kV lines means that the identification of the subsection and the conductor where the ground fault has happened [11,12] is the main task of the protection systems in order to disconnect immediately the conductor with the ground fault in the corresponding subsection [13]. This means only trains running in the subsection with the ground fault, in the case that the fault is in the catenary, will be disconnected from the power supply.…”

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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“…For this reason, this method can be insufficiently accurate and identifies failures in the wrong subsections. Therefore, a method of compensation using the neutral currents circulating in adjacent autotransformers to those of the faulty section was proposed in [11].…”

Section: Introductionmentioning

confidence: 99%

A New Method of Ground Fault Location in 2 × 25 kV Railway Power Supply Systems

et al. 2017

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Abstract:Owing to the installation of autotransformers at regular intervals along the line, distance protection relays cannot be used with the aim of locating ground faults in 2 × 25 kV railway power supply systems. The reason is that the ratio between impedance and distance to the fault point is not linear in these electrification systems, unlike in 1 × 25 kV power systems. Therefore, the location of ground faults represents a complicated task in 2 × 25 kV railway power supply systems. Various methods have been used to localize the ground fault position in 2 × 25 kV systems. The method described here allows the location of a ground fault to be economically found in an accurate way in real time, using the modules of the circulating currents in different autotransformers when the ground fault occurs. This method first needs to know the subsection and the conductor (catenary or feeder) with the defect, then localizes the ground fault's position.

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“…This complexity of the detection and location of ground faults in the 2 × 25 kV lines means that the identification of the subsection and the conductor where the ground fault has happened [6,9] is the main task of the protection systems in order to disconnect immediately the conductor with the ground fault in the corresponding subsection [10]. So only trains running in the subsection with the ground fault, in the case where the fault is in the catenary, will be disconnected from the power supply.…”

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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Comprehensive Revisions on Fault-Location Algorithm Suitable for Dedicated Passenger Line of High-Speed Electrified Railway

Cited by 22 publications

References 1 publication

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 Method of Ground Fault Location in 2 × 25 kV Railway Power Supply Systems

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

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