Single pole-to-earth fault detection and location on a fourth-rail DC railway system

Jin, Jennifer; Allan, J.; Goodman, C.J.; Payne, K.

doi:10.1049/ip-epa:20040212

Cited by 15 publications

(9 citation statements)

References 8 publications

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“…Wherefore due to the limited technology available at that time of occurrence that resolved to provide another additional rail acting as the return path, hence the fourth rail traction. London Underground was the first to apply the fourth rail traction around 1903 to 1907 [69] and it is still in use today. The prior additional rail in between the running rails now acts as the fourth rail (the return path) whereas the third rail is mounted outside of the running rails [29], [70].…”

Section: What About a DC Fourth Rail Traction For Metro Transit?mentioning

confidence: 99%

“…The prior additional rail in between the running rails now acts as the fourth rail (the return path) whereas the third rail is mounted outside of the running rails [29], [70]. The third rail is at a potential of +420 V while the fourth rail is at -210 V, with a combined voltage operation of 630 V. In addition, the two running rails have one of its rails to be electrically continuous and at earth potential [69]. A fourth rail traction technology came to light as a post development of the third rail traction technology.…”

Section: What About a DC Fourth Rail Traction For Metro Transit?mentioning

confidence: 99%

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Review of the AC Overhead Wires, the DC Third Rail and the DC Fourth Rail Transit Lines: Issues and Challenges

et al. 2020

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This paper focuses on transits available around the world. AC voltage transits and DC voltage transit are reviewed and compared. Emphasis is given to differences, advantages and disadvantages of voltage supplies and traction types. First, differences between bus rapid transit (BRT), metro, light rail transit (LRT) and light metro are covered, with special attention to statistical of annual passengers per year, an attribute that defines the type of railway transit. Mention is also made to the history of DC and AC overhead wires, other traction preferences for metro transit and highlighted differences between the third rail and fourth rail traction. Malaysian transit systems are then discussed, with special attention to LRT Kelana Jaya line, world"s third DC transit that employs the fourth rail traction. The discussion have produced relevant statistical data that this paper is in part aimed at summarizing and at comparing with what accomplished on the same subject within the third rail traction framework. The increased in LRT Kelana Jaya line annual passengers per year is a proof of success for the fourth rail technology.

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Section: What About a DC Fourth Rail Traction For Metro Transit?mentioning

confidence: 99%

Section: What About a DC Fourth Rail Traction For Metro Transit?mentioning

confidence: 99%

Review of the AC Overhead Wires, the DC Third Rail and the DC Fourth Rail Transit Lines: Issues and Challenges

et al. 2020

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“…At present, many fault location methods based on prediction methods have been used in railway systems, such as those in [21]- [24]. According to existing studies, we know that rail failure is related to many factors, such as human factors [25] (e. g., traffic flow, etc.)…”

Section: Fault Location Designmentioning

confidence: 99%

Integrative Design of an Emergency Resource Predicting-Scheduling-Repairing Method for Rail Track Faults

Yuan

Zhang

et al. 2019

IEEE Access

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To solve the problem of track failure in railway system, integrative design of an emergency resource forecasting-scheduling-repairing method is proposed in this paper. In the current railway repair process, resource dispatching centers dispatch transport resources to the fault point for the repair work. In order to optimize this process, a hybrid prediction method consisting of radial basis function neuron network (RBFNN) and expert prediction method to rationally predict repair resources is proposed. In order to optimize the resource transportation path and reduce the transportation cost, a bi-objective resource scheduling method is presented in this paper. A fuzzy evaluation method combining with the prospect theory to optimally select the repairing for the repair work is formulated. Finally, experiment studies are carried out and the results illustrate the effectiveness of the proposed method.

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“…(1) The directional over-current protection [10] . It mostly occurs in traditional and radial distribution network topological structure.…”

Section: The Protection Systemmentioning

confidence: 99%

The Applied Research on the Optimization of Distribution Network Topological Structure Configuration Model

Huang¹,

Chen²,

Chen³

et al. 2016

IJGDC

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With the rapid growth of the economy and the increasing improvement of life, the large electricity consumption gradually intensifies power grid transmission pressure. In order to solve this problem, the paper analyses the trend of tremendous development in computer, electronic and electric power technology and makes a deep related research. Based on the further analysis of key technologies, the author sets constraint conditions, analyzes the supporting effect, and establishes an optimal configuration model with multiple purposes for distribution network topological structure. On the basis of the minimal module ideal point algorithm, the overall planning is conducted through deep consideration to assure the further optimal configuration of the model. Then the value will be calculated by using the POS algorithm. At last, four optimization plans are obtained and the fourth one whose weight value can be adjusted is chosen to achieve automation and the more rationalized and optimal development of the distribution network topological structure. In addition, this optimal plan provides a stronger basis of theory to the practical application of related work and industries.

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Single pole-to-earth fault detection and location on a fourth-rail DC railway system

Cited by 15 publications

References 8 publications

Review of the AC Overhead Wires, the DC Third Rail and the DC Fourth Rail Transit Lines: Issues and Challenges

Review of the AC Overhead Wires, the DC Third Rail and the DC Fourth Rail Transit Lines: Issues and Challenges

Integrative Design of an Emergency Resource Predicting-Scheduling-Repairing Method for Rail Track Faults

The Applied Research on the Optimization of Distribution Network Topological Structure Configuration Model

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