Determination of Capacitive Couplings between Multiwire Overhead Contact System and Adjacent Lines

This article discusses the problem of improving the accuracy of determining the location of a short circuit in the AC railways traction networks. Finding a short circuit can take several hours. An urgent task is reducing the time to search for a fault location. The purpose of the study is to develop a method that increases the accuracy of determining the location of a short circuit in AC traction networks. The method is based on computer modeling of inhomogeneities in the structure of the traction network and the arc. The proposed method makes it possible to take into account the arc resistance. The method was tested on the traction network active section. The error of the method is 200-300 meters. The method can find practical application in the work of dispatchers.

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Determination of short circuit location in the electric railway traction

BYKADOROV

Zarutskaya

Milekhina

2021

J. Phys.: Conf. Ser.

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Modeling and calculation of SC currents for alternative group grounding system for the dc contact line supports

Osipov

Osipova

2021

J. Phys.: Conf. Ser.

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The problem of creating a mathematical model of the group grounding system of the contact line supports is considered. The paper considers an alternative way of organizing group grounding. For such a method of grounding, a model of a section of a DC railroad is proposed, which makes it possible to calculate the SC current. An analysis of the constructed model quality is carried out, an assessment of the calculation error according to the proposed method is given.

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Application of the train congestion recovery method for constructing an instantaneous direct current railway section

Osipov

Logunova

2021

J. Phys.: Conf. Ser.

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Improving the energy efficiency of the transportation process is one of the key tasks, the solution of which is one of the priority areas of the holding JSC «RZD» research. The successful solution of this problem depends, among other things, on the effectiveness of measures taken to reduce energy losses arising from electricity transmission to the consumer, which is the rolling stock of electrified railways. To develop a set of organizational and technical measures aimed at minimizing electricity consumption, an effective apparatus that provides determination of energy losses amount of in the electric-traction netware in real time is needed. The article proposes a method for hardware-analytical calculation of energy losses, which is based on an algorithm for processing the results of direct measurements. It is proposed to calculate power losses using laws and relationships known from the course of electrical engineering. A distinctive feature of the proposed method is the function of recreating the instantaneous circuit based on the data of currents and voltages measurements at the control points of a given section. The proposed method is suitable for use exclusively on DC electrified railways. Also, the paper presents the methods for determining energy losses used today in Russia, and gives their brief characteristics. The logical and mathematical apparatus of the method is described in detail, indicating the possible reasons that, in the process of synthesizing instantaneous circuits, can affect the occurrence of errors. An assessment of the study results of this method application in the electric-traction netware of railways is given.

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Determination of Capacitive Couplings between Multiwire Overhead Contact System and Adjacent Lines

Cited by 3 publications

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Determination of short circuit location in the electric railway traction

Determination of short circuit location in the electric railway traction

Modeling and calculation of SC currents for alternative group grounding system for the dc contact line supports

Application of the train congestion recovery method for constructing an instantaneous direct current railway section

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