RU216800U1 - Mobile automation device for monitoring the contact network of electrified railways - Google Patents

Abstract

The utility model relates to the field of electrical engineering and can be used to create high-quality control automation systems for the operation of electric rolling stock and contact networks of electrified railways. A mobile automation device for monitoring the contact network of electrified railways installed on an electric locomotive, which consists in using information about the health and failure of the contact network obtained from the spectral decomposition of the traction electric current flowing through the sliding contact between the pantograph of the electric locomotive and the contact wire of the contact network, from the traction electric sensor current passing through the sliding contact, information is taken and fed to the analog-to-digital converter of the computing device, which, using the fast Fourier transform, receives the current spectrum, then the signal carrying information about the current spectrum is transmitted to the encryption unit, which, after encoding the signal , transmits it to a portable train radio station, which transmits a signal to an electronic computer (computer) of the energy dispatcher. The computer of the energy dispatcher, according to a special program, processes the received information: synchronizes the received spectrum with the location of the electric locomotive; performs comparison operations by subtracting the resulting spectrum of harmonics from the normal spectrum of harmonic oscillations previously entered into the program; all the results of calculating the deviation spectra are greater than the specified limit values, together with information about the coordinate of the electric locomotive, the magnitude of the deviations, is entered in the register of deviations with their subsequent visualization. A database is maintained for all deviations in the controlled area, according to the information, the dynamics of the development of negative processes leading to failures in the contact network is analyzed.

Description

The proposed technical solution relates to the field of electrical engineering and can be used to create high-quality control automation systems for the operation of electric rolling stock and contact networks of electrified railways.

In the transport system of the Russian Federation, the leading type is railway transport. The contact network is a complex technical structure of electrified railways, the contact network has practically no reserve, therefore, they strive for its higher reliability under operating conditions. The contact network must ensure uninterrupted current collection at high speeds of electric trains, under any atmospheric conditions. It is the most vulnerable object in the traction power supply system, it is its unreliable operation that in most cases is the cause of marriages (train delays over the time specified) [1].

At the moment, there is no single system in the world capable of automatically monitoring the state of the contact network. The creation of an automatic control system will make it possible to detect deviations from the normal operating state of the contact network in real time, predict possible failures, thereby avoiding the huge costs associated with downtime for repairs, and increase the safety of railway transportation [2,3].

The proposed mobile automation device for monitoring the contact network of electrified railways is based on the implementation of a method for continuous monitoring of a sliding contact connection between a pantograph and a contact wire, subject to electric traction current, external natural factors, technical malfunctions that cause sparking, the formation of an electric arc, significant changes in contact resistance, arising during the movement of electric rolling stock, giving an assessment of the sliding contact, and, consequently, an integral assessment of the functioning of the pantograph and the contact network [4].

In the proposed device, the task of controlling the contact network is solved by implementing the sliding contact control algorithm presented in the patent [4]. The traction electric current passing through the sliding contact between the pantograph and the contact wire is expanded into a Fourier series in real time. The resulting spectrum of traction current characterizes the operation of the sliding contact and power electrical equipment of the rolling stock. Harmonics associated with the normal operation of the power electrical equipment of the electric locomotive are subtracted from the obtained spectrum of the traction electric current. During normal operation of the sliding contact, the spectrum obtained as a result of subtraction will be practically zero. Otherwise, non-zero harmonics of the spectrum will characterize deviations from the normal operation of the sliding contact. Comparison of the obtained spectrum with the reference spectrum of the traction electric current, which characterizes the normal operation of the sliding contact, makes it possible to assess the characteristic malfunctions of the pantograph and contact wire.

To implement the algorithm of the method [4] in practice, the required digital equipment is installed on an electric locomotive. Calculations according to the above algorithm on the installed digital equipment are carried out in real time, then they are transmitted via train radio communication to the energy dispatcher. The equipment provides for coordination with the position of the electric locomotive relative to the railway track and, therefore, relative to the contact wire.

When implementing the method algorithm on many units of electric rolling stock, it becomes possible to automate the process of monitoring the contact wire during normal operation of the pantograph, as well as to detect deviations from the normal operation of the pantograph when the contact wire is in good condition, which makes the control based on the final result of the equipment operational, reliable, increases reliability and train traffic safety [4].

The proposed mobile automation device for monitoring the contact network of electrified railways is installed on an electric locomotive. A block diagram of a mobile device for automating the control of the contact network of electrified railways is shown in fig. 1.

On the block diagram of Fig. 1 analog current sensor (DT) measures the traction current coming from the contact network through a sliding contact to the electric locomotive. An analog-to-digital converter (ADC) converts the signal into digital form and transmits it to the computing unit. The computing unit (VCHB) processes the received signal and decomposes it into a spectrum using the Fourier transform method. After conversion, the signal carrying information about the current spectrum is transmitted to the encryption unit. Encryption unit (encoder) encodes the signal and transmits it to a portable train radio station (PRS). The uninterruptible power supply unit (UPS) provides the device for monitoring the state of the contact network with uninterrupted power supply necessary for the operation of the remaining units. The algorithm of the program for monitoring the state of the contact network consists of the implementation of the following procedures. The information that enters the communication network of the energy dispatcher is fed to an electronic computer (computer) with input-output devices. Special software installed on a computer processes the received information: synchronizes the received spectrum with the location of the electric locomotive that transmitted the information; information about the location of the electric locomotive can be transmitted in two ways, by satellite through the GLONAS system installed in the train radio station, or with less accuracy from the train dispatcher by means of determining the block section on which the electric locomotive is located; performs comparison operations by subtracting the resulting spectrum of harmonics from the normal spectrum of harmonic oscillations previously entered into the program; all the results of calculation of the deviation spectra are greater than the specified limit values, together with information about the coordinate of the electric locomotive, the magnitude of the deviations is entered in the register of deviations with their subsequent visualization. A database is maintained for all deviations in the controlled area, according to the information, the dynamics of the development of negative processes leading to failures in the contact network is analyzed.

Information sources

1. Goroshkov, Yu.I. contact network. / Yu.I. Goroshkov, N.A. Bondrev - M.: Transport, 2011 - 400 p.

2. Magidin, F.A. Device and operation of the contact network / F. A. Magidin - M .: Route, 2006. -62 p.

3. Belyaev, I.A. The device and maintenance of the contact network for high-speed traffic / I.A. Belyaev. -M.: Transport, 1989.

4. Pat. No. 2713575 Russian Federation, RU2713575 C1, IPC G01R 31/01 (2006.01), B60L 5/4 (2006.01), V60M (2006.01). A method for monitoring the state of the sliding contact connection of a pantograph with a contact wire during the movement of an electric rolling stock of railways / A.P. Stepanov, M.A. Stepanov, E.M. Stepanov; applicant and patent holder Irkut. state un-t ways reported. -No. 20191214372, application. 05/07/2019 publ. 05.02.2020, Bull. No. 4.

Claims (1)

A mobile automation device for monitoring the contact network of electrified railways, consisting of an uninterruptible power supply unit, a current sensor configured to measure the traction current coming from the contact network through a sliding contact connected to an analog-to-digital converter, which is connected to a computing device configured to to decompose the traction current into a spectrum using the Fourier transform method, which is connected to the encryption unit, which is configured to transmit a signal to the train radio station.

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