A Novel Fault-Location Algorithm for AC Parallel Autotransformer Feeding System

Kim, Chul‐Hwan; Kim, Min-Sung; Kim, Dong-Hyun; Heo, Seung-Hoon; Kim, Hyun Dong; An, Tae-Pung

doi:10.1109/tpwrd.2018.2872165

Cited by 16 publications

(11 citation statements)

References 10 publications

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“…Moreover, the assessment of the contact electro-erosion of the circuit breakers from the power supply installations in the railway traction is made by counting the number of disconnections (in normal or faulty regime) and the disconnected real current value is not taken into account. This assessment of the contact electro-erosion is done according to the technical data sheets and/or operating instructions [ 13 ]. Finally, this leads to maintenance activities at inadequate times regarding the electrical wear of the contacts of those circuit breakers.…”

Section: Methods and Functional Scheme Of The Fault Location System From Power Supply System Of Railway Infrastructurementioning

confidence: 99%

“…In this sense, some research papers describe some new methods to measure the line impedance in order to improve distance protection relays, in the sense of quick location of a fault, for improving the continuity and reliability of the railway infrastructure [ 13 , 14 , 15 , 16 ]. Furthermore, Cho et al [ 13 ] present a fault locator used to detect the fault location with good accuracy.…”

Section: Introductionmentioning

confidence: 99%

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Innovative Integrated Solution for Monitoring and Protection of Power Supply System from Railway Infrastructure

Andruşcă

Adam

Dragomir

et al. 2021

Sensors

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This paper describes an innovative integrated solution for monitoring and protection of the power supply system of electric traction. The development of electronics devices, new possibilities to communicate (wireless), and new sensors makes it possible to design, develop and implement new hardware–software structures in various fields such as energy systems, transportation infrastructure, etc. This contributes to increasing developments in the monitoring and protection of railway infrastructure. A monitoring and protection system that uses sensors and devices to acquire electrical parameters from railway infrastructure has been developed and applied for fault detection and protection of power supply systems from electric traction. The solution of monitoring and protection presented are composed of a hardware–software structure with Global System for Mobile Communications (GSM) communication for monitoring of power supply installations from the electric traction and a central remote system composed of a device with GSM communication and a server that will allow, among others things, accurate detection of the block section (SC), in which an electrical fault (short circuit) has occurred, determination of the circuit breakers electro-erosion from the railway installations and an indication of the opportune moment for maintenance activity, respectively, as well as knowledge of the technical condition of some equipment from the return circuit. The proposed and developed method for monitoring devices has been validated in the railway laboratory to confirm its capability to detect defects and was tested in the field. Experimental results in the field and appropriate data analysis are included in this article.

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Section: Methods and Functional Scheme Of The Fault Location System From Power Supply System Of Railway Infrastructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Innovative Integrated Solution for Monitoring and Protection of Power Supply System from Railway Infrastructure

Andruşcă

Adam

Dragomir

et al. 2021

Sensors

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“…Lin et al [13] combined the AT neutral current ratio method and the reactance method to realize fault location for the over-zone feeding operation condition in high-speed electrified railways. Considering the structure of Korean railway system, Cho et al [14] proposed a novel fault location method based on the relationship between AT neutral currents and branch currents, which improved the accuracy of fault location for Korean traction power supply system. Serrano et al [15] proposed a method of ground fault location based on currents of the ATs.…”

Section: Introductionmentioning

confidence: 99%

Improved fault location method for AT traction power network based on EMU load test

Lin

Quan

et al. 2022

Rail. Eng. Science

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The autotransformer (AT) neutral current ratio method is widely used for fault location in the AT traction power network. With the development of high-speed electrified railways, a large number of data show that the relation between the AT neutral current ratio and the distance from the beginning of the fault AT section to the fault point (Q–L relation) is mostly nonlinear. Therefore, the linear Q–L relation in the traditional fault location method always leads to large errors. To solve this problem, a large number of load-related current data that can be used to describe the Q–L relation are obtained through the load test of the electric multiple unit (EMU). Thus, an improved fault location method based on the back propagation (BP) neural network is proposed in this paper. On this basis, a comparison between the improved method and the traditional method shows that the maximum absolute error and the average absolute error of the improved method are 0.651 km and 0.334 km lower than those of the traditional method, respectively, which demonstrates that the improved method can effectively eliminate the influence of nonlinear factors and greatly improve the accuracy of fault location for the AT traction power network. Finally, combined with a short-circuit test, the accuracy of the improved method is verified.

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“…To compensate for the neutral currents circulating in adjacent autotransformers, a revision algorithm with the neutral current ratio method has been proposed [10]. Recently, methods derived from the neutral current ratio were also proposed in [11,12]. Many researchers have proposed to use of traveling wave methods for the fault location scheme of AC electric railway systems [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Generalized Fault-Location Scheme for All-Parallel AT Electric Railway System

Han

Liu

et al. 2020

Energies

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The existing fault location methods for all-parallel autotransformer railway systems (AARS) have limitations because they are generally designed for several given feeding conditions. In alternate feeding conditions, the existing fault location methods do not work well and may have large errors. To solve this problem, we have proposed a generalized fault location scheme for AARS in this paper. After analyzing the fault characteristics of AARS, we classified the feeding conditions of the faulted section of AARS into three types and introduced the corresponding fault location methods. In order to identify the faulted section and its feeding condition, we first formed a switch state matrix based on the adjacency matrix and mapped the fault current distribution into a current state matrix, then we unified the two matrices into a fault state matrix to reflect the fault state of the AARS. Finally, a generalized fault location scheme was proposed based on a fault state matrix. The proposed scheme effectively eliminates the negative influence of feeding conditions on the fault location, and it can identify the fault type and locate faults in different feeding conditions. Several simulation cases verified the effectiveness of the proposed scheme.

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A Novel Fault-Location Algorithm for AC Parallel Autotransformer Feeding System

Cited by 16 publications

References 10 publications

Innovative Integrated Solution for Monitoring and Protection of Power Supply System from Railway Infrastructure

Innovative Integrated Solution for Monitoring and Protection of Power Supply System from Railway Infrastructure

Improved fault location method for AT traction power network based on EMU load test

Generalized Fault-Location Scheme for All-Parallel AT Electric Railway System

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