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    Wyświetlanie 1-6 z 6
    Tytuł:
    The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems
    Autorzy:
    Matusevych, O.
    Kuznetsov, V.
    Sychenko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/223664.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    railway traction
    power systems
    efficiency
    maintenance equipments
    traction substation
    trakcja kolejowa
    systemy zasilania
    wydajność
    konserwacja urządzeń
    Opis:
    Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.
    Źródło:
    Archives of Transport; 2018, 47, 3; 39-47
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural – functional model of maintenance and repair of the traction substations equipment
    Strukturalno-funkcjonalny model utrzymania i napraw wyposażenia podtsacji trakcyjnych
    Autorzy:
    Sychenko, V.
    Mironov, D.
    Białoń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/253653.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Naukowo-Wydawniczy TTS
    Tematy:
    traction substations
    rail transport
    efficiency
    podstacja trakcyjna
    transport kolejowy
    efektywność
    Opis:
    To solve the problem of improving the quality control of substation equipment maintenance and repair process the structural and functional analysis for the distances of power supply has been performed. As a linguistic support for this task the International Standards Package Modeling IDEF (Icam Definition) has been used. It allows to analyze the process from three key perspectives at the same time – IDEFO (Integrated Definition for Function Modeling), IDEF3 and DFD (Data Flow Diagram). IDEF modeling is a way to reduce the amount of costly errors by structuring the process in the early stages of creating intelligent systems. It improves the communication between users and developers and smooth the transition from analysis to design. A complex task of equipment maintenance and repair process has been divided into a series of simple tasks on the basis of IDEF modeling. Structural - functional modeling with the selection of events has been done according to the IDEF0 methodology. Description of processes has been done according to the methodology IDEFЗ. DFD method has been used for building the data flow diagrams. Conducted structural-functional analysis has been shown that at some stages this process often requires the operational definition of different types of resources needed to perform repair work.
    Źródło:
    TTS Technika Transportu Szynowego; 2017, 11; 49-52
    1232-3829
    2543-5728
    Pojawia się w:
    TTS Technika Transportu Szynowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a mathematical model of the generalized diagnostic indicator on the basis of full factorial experiment
    Autorzy:
    Sychenko, V. G.
    Mironov, D. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/223935.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electricity
    traction substation
    maintenance
    diagnostics
    full factorial experiment
    mathematical model
    regression equation
    Elektryczność
    podstacja trakcyjna
    konserwacja
    diagnostyka
    eksperyment czynnikowy
    model matematyczny
    równanie regresji
    Opis:
    Purpose. The aim of this work is to develop a mathematical model of the generalized diagnostic indicator of the technical state of traction substations electrical equipment. Methodology. The main tenets of the experiment planning theory, methods of structural-functional and multi-factor analysis, methods of mathematical and numerical modeling have been used to solve the set tasks. Results. To obtain the mathematical model of the generalized diagnostic indicator, a full factorial experiment for DC circuit breaker have been conducted. The plan of the experiment and factors affecting the change of the unit technical condition have been selected. The regression equation in variables coded values and the polynomial mathematical model of the generalized diagnostic indicator of the circuit breaker technical condition have been obtained. On the basis of regression equation analysis the character of influence of circuit breaker diagnostic indicators values on generalized diagnostic indicator changes has been defined. As a result of repeated performances of the full factorial experiment the mathematical models for other types of traction substations power equipment have been obtained. Originality. An improved theoretical approach to the construction of generalized diagnostic indicators mathematical models for main types of traction substations electric equipment with using the methods of experiments planning theory has been suggested. Practical value. The obtained polynomial mathematical models of the generalized diagnostic indicator D can be used for constructing the automated system of monitoring and forecasting of the traction substations equipment technical condition, which allows improving the performance of processing the diagnostic information and ensuring the accuracy of the diagnosis. Analysing and forecasting the electrical equipment technical condition with the using of mathematical models of generalized diagnostic indicator changes process allows constructing the optimal strategy of maintenance and repair based on the actual technical condition of the electrical equipment. This will reduce material and financial costs of maintenance and repair work as well as the equipment downtime caused by planned inspections and repair improving reliability and uptime of electrical equipment.
    Źródło:
    Archives of Transport; 2017, 43, 3; 125-133
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resource evaluation of friction pair “contact wire – contact strip”
    Autorzy:
    Antonov, A. V.
    Sychenko, V. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/224071.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electrified railways
    resource
    reliability
    current collection
    wear rate
    contact wire
    contact strip
    friction coefficient
    kolej elektryczna
    zasób
    niezawodność
    pobór prądu
    stopień zużycia
    przewód jezdny
    listwa stykowa
    współczynnik tarcia
    Opis:
    Purpose. Investigate the impact of current collection system parameters and external factors on the resource of friction pair “contact wire – contact strip”. Relevance. The level of electrified railways reliability depends on the reliability and durability of the individual objects of power supply system and the locomotive facilities, in turn, the current collection quality depends on design of contact network and pantographs, contact wires materials, contact strips and external influencing factors. The resource system “contact wire – contact strip” is an important technical and economic characteristics, and its average actual resource is much less established. It means that the actual resource does not reach the optimum value from an economic point. Increasing velocity of the electric rolling stock exacerbates the problem of improving the current collection quality, becomes an actual task of increasing the resource friction pair “ contact wire – contact strip” for mainline railways. Scientific novelty. This work determined the influence structural parameters of the friction pair, the current collection system parameters and external factors on the wear rate of the friction pair “contact wire – contact strip”. Proposed to create a predictive mathematical model that uses the dependence of the influencing parameters obtained in this work to assess the wear and resource of contact wire and contact strips. Practical importance. Developed the device for wear researching of friction pairs in laboratory conditions allows assessing the wear rate of the system “contact wire – contact strip” and their residual resource at different combinations of the friction pair and external factors. The obtained results allow us to construct a predictive mathematical model to evaluate wear rate of the elements of the friction pair “contact wire – contact strip” and identify their residual resource.
    Źródło:
    Archives of Transport; 2017, 44, 4; 7-14
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving the quality of voltage in the system of traction power supply of direct current
    Autorzy:
    Sychenko, V. G.
    Bosiy, D. O.
    Kosarev, E. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/223609.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    traction power supply
    direct current
    voltage quality
    traction network force
    operation modes
    zasilanie trakcji
    prąd stały
    jakość napięcia
    tryby pracy
    Opis:
    Purpose of the work is improved approaches to ensure the required quality parameters of voltage in the traction network based on modern technologies and equipment in the application of power distribution system. Actuality. The introduction of high-speed traffic, increase weight standards Train necessitates increasing the carrying capacity of railways. Often the carrying capacity of existing sections electrified at 3.0 kV DC power supply unit limits. Such limitations include voltage decrease on the electric current collector below the allowable value for the normal operation of 2700 (2900 for high-speed V) and heating the contact wires, thereby losing their mechanical strength. Existing power supply system of RS, which have considerable installed traction substations, can not provide the required level of power density traction network for high-speed movement within 1.5 - 2 MW / km and, respectively, the required voltage quality. At the same time, the daily loading of a powerful traction substations in providing intensive schedule of trains does not exceed 20-25%, while the energy loss in traction network peak load increases and reaches 10-15% of the energy consumed. Thus, the existing system of power traction networks is not sufficiently effective and economical, even with the application of existing methods to strengthen them. In our view, the main limiting factor for a given quality of voltage in the traction network is the use of centralized power. From this, the development of measures to improve the quality of voltage in the traction network in the implementation of high-speed traffic in a growing scarcity of energy resources is an urgent task. Scientific novelty. Using distributed power supply system with adjustable supply points combined into intelligent power supply, which enables adaptive change the characteristics of the transfer, conversion and consumption and optimize the mode of functioning of the traction power supply is suggested for improving the quality of voltage in the traction network in the implementation of high-speed and heavy traffic. Practical significance. Improving the quality of voltage in the traction network by using the proposed circuit design traction power supply will ensure the desired mode voltage and power characteristics of the traction network in the implementation of high-speed and heavy traffic while reducing electricity losses by 20-30%.
    Źródło:
    Archives of Transport; 2015, 35, 3; 63-70
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development a Forecasting Method of Friction Pairs Wear of the Current Collection
    Metoda prognozowania zużycia par ciernych w urządzeniach odbierających prąd
    Autorzy:
    Antonov, A. V.
    Bolshakov, Y. L.
    Sychenko, V. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/215157.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Kolejnictwa
    Tematy:
    forecasting
    neuron
    current collector
    contact strip
    contact wire
    wear
    prognozowanie
    odbierak prądu
    nakładka stykowa
    przewód jezdny
    zużycie
    Opis:
    Purpose: Development a forecasting method of friction pairs wear of the current collection on electric rail transport. Relevance: The most costly in the operation of the electrified railway transport are maintenance and repair of contact networks and pantographs. The costs magnitude depends of the catenary type, electric rolling stock, materials of the friction pair „contact wire – contact strip” and environment parameters. For today there is no consensus regarding the choice of the pantograph contact strips type for the specific operating conditions of the electric rolling stock. Therefore, the resource elements of the friction pair ineffi ciently used. A solution to this problem would be to a forecasting method of friction pairs wear of the current collection. Scientific novelty: Developed a method forecasting wear of contact wires and contact strips basis on the of the neural network model. To build a neural network was used the experimental dependences and was taken into account the change pressing force of the pantograph along span of the catenary, current value, current collecting elements type and modify the parameters environment. Practical importance: The proposed method allows to estimate the wear of the contact pair without the necessity for additional bench tests. This will significantly increase the effectiveness of the design new and modernization of alreadyexploited contact network sections.
    Cel: Opracowanie metody prognozowania zużycia par ciernych urządzeń odbierających prąd w kolejowej trakcji elektrycznej. Znaczenie: Utrzymanie i naprawa systemu sieci trakcyjnej i pantografów są najbardziej kosztowne w eksploatacji elektrycznego taboru kolejowego. Wielkość kosztów zależy od typu sieci trakcyjnej, elektrycznego taboru kolejowego, materiałów, z których są wykonane pary cierne, tzn. przewodu jezdnego i nakładki stykowej oraz parametrów środowiska. Do dzisiaj nie dokonano wyboru typu nakładki stykowej pantografu dla konkretnych warunków eksploatacji elektrycznego taboru kolejowego. W związku z tym, właściwości elementów par ciernych nie są efektywnie wykorzystywane. Rozwiązaniem tego problemu może być metoda prognozowania zużycia par ciernych urządzeń odbierania prądu. Innowacja naukowa: Opracowana metoda prognozowania zużycia par ciernych przewodu jezdnego i nakładki stykowej jest oparta na modelu sieci neuronowej. W celu zbudowania sieci neuronowej wykorzystano zależności eksperymentalne i wzięto pod uwagę zmianę sił nacisku na pantograf wzdłuż przewodu trakcyjnego, wartość prądu, typy elementów urządzeń odbierania prądu i zmiany parametrów środowiska. Znaczenie praktyczne: Zaproponowana metoda pozwala ocenić zużycie pary ciernej przewodu bez konieczności przeprowadzenia dodatkowych badań stanowiskowych, co znacznie zwiększy efektywność projektowania nowych i modernizacji już istniejących odcinków sieci trakcyjnej.
    Źródło:
    Problemy Kolejnictwa; 2017, 177; 13-19
    0552-2145
    2544-9451
    Pojawia się w:
    Problemy Kolejnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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