Time and frequency characterization of radiated disturbance in telecommunication bands due to pantograph arcing

Mariscotti, Andrea; Marrese, Attilio; Pasquino, Nicola; Moriello, Rosario Schiano Lo

doi:10.1016/j.measurement.2013.04.054

Cited by 28 publications

(18 citation statements)

References 23 publications

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“…Usuda et al [143] also applied the short-time Fourier transform to the contact force and predicted the contact wear rate. Mariscotti et al [144] performed the time-frequency analysis on the current signal from catenary and evaluate the current collection quality. Zhang [145] employed the wavelet transform to study the time-frequency characteristics of contact force in different frequency bands and diagnosed the contact wire irregularity.…”

Section: Dynamic State Evaluation Based On Time-frequency Analysismentioning

confidence: 99%

Advances of research on high-speed railway catenary

Liu

Song

et al. 2017

J. Mod. Transport.

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The interaction between the catenary and pantograph is one of the most crucial factors that determine the train operation in high-speed railway. The bad state of catenary is able to directly influence the power supply safety of traction power system. In this paper, four aspects on the catenary research of high-speed railway are reviewed in detail, namely the solution methods for catenary equilibrium state, the dynamic modeling methods of catenary, non-contact detection methods of catenary, and the static and dynamic evaluation methods of catenary. In addition, their recent advances are described. For the low solution accuracy of the initial equilibrium state of catenary, the structure finding method with multi-objective constraint and nonlinear finite element procedure are introduced to solve the problem. For the catenary's dynamic modeling, considering the influence of environmental wind on the catenary, environmental wind simulations and wind tunnel tests are used to obtain the aerodynamic coefficients and build the wind field along the catenary for analysis of its wind vibration characteristics. In order to improve the detection accuracy of non-contact detection for the catenary, the deep learning theory and real-time detection algorithms should be adopted in the future. In view of the lack of dynamic assessment method for the catenary, the modern spectrum evaluation, timefrequency analysis, big data technology and their combinations will be the important means for future catenary evaluation.Keywords High-speed railway Á Modeling of catenary Á Simulation of catenary Á Detection of catenary Á Evaluation of catenary

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Section: Dynamic State Evaluation Based On Time-frequency Analysismentioning

confidence: 99%

Advances of research on high-speed railway catenary

Liu

Song

et al. 2017

J. Mod. Transport.

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“…The radiated disturbance from pantograph arcing are usually investigated by two methods: numerical analysis and on-site measurements [2][3][4]. In [2], a numerical model of pantograph arcing was built in CST to investigate the coupling between the pantograph and antennas on the train roof.…”

Section: Introductionmentioning

confidence: 99%

“…However, pantograph arcing is not omnidirectional antenna and the arcing properties are related to train speed, offline distance, materials of pantograph and catenary, weather and so on which means that single measured field waveform can't represent the real arc. In addition, on-site measurements of pantograph arcing at one position on the train were carried out in [3] [4]. The time-domain arcing transients in both AC and DC power supply line (France and Italy) were recorded.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Calculating the Radiated Disturbance From Pantograph Arcing in High-Speed Railway

Wen

Marvin

et al. 2017

IEEE Trans. Veh. Technol.

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Abstract-Pantograph arcing is a key electromagnetic disturbance source to affect train control system in high-speed railway. Since the characteristics of pantograph arcing is related to train speed, it is necessary to investigate effective numerical modeling and measurement method. However, due to the uncontrollable train speed during on-site measurement, it is difficult to study the radiated disturbance from arcing in the corresponding speed and repeat the same measurement. Therefore, a method combined numerical modeling and reverberation chamber measurements for calculating the radiated disturbance from pantograph arcing in a high-speed railway is proposed. Numerical models of train and sensitive equipment are built to calculate the coupling coefficient in CONCEPT II. And a new measurement procedure in reverberation chamber using pulse signal as the reference source is proposed based on a speedcontrollable laboratory replica to measure the total radiated power of pantograph arcing. Then the radiated disturbance from pantograph arcing to the sensitive equipment is achieved with the coupling coefficient and the total radiated power of arcing. The method is verified laboratory experiments. This method can solve the uncontrollable train speed problem during on-site measurement and improve the repeatability of measurement.

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“…Pantograf katener sisteminde oluşan arızaların tespit edilmesi için genel olarak iki farklı yöntem bulunmaktadır [4]. Akım gerilim tabanlı arıza teşhis yönteminde pantograf katener sistemde kullanılan elektriğin akım ve gerilim sinyalleri analiz edilerek arıza teşhisi yapılmaktadır [5][6][7][8]. Bu arıza teşhis yönteminde pantograf temas bölgesinde oluşan ark arızaları gibi bazı arızalar tespit edilmektedir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Pantograf-Katener Sistemler için Bulanık Mantık Tabanlı Belirlenen Pantograf Modeli Kullanılarak Ark Tespiti Yaklaşımı

Yaman¹,

Karaköse²,

Aydın³

et al. 2017

SAÜ Fen Bilimleri Enstitüsü Dergisi

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ÖZElektrikli trenler, günümüzde yaygın olarak kullanılan, önemli bir ulaşım türüdür. Diğer ulaşım türleri ile karşılaştırıldığında elektrikli trenlerin güç tüketimi ve çevre kirliliğine olan etkisi daha azdır. Ayrıca konfor ve güvenlik gibi birçok avantajı vardır. Elektrikli trenlerde kullanılan en önemli bileşenlerden biri pantograf katener sistemidir. Pantograf katener sistemi, demiryolu hattı boyunca bulunan katener sistemi ve lokomotif üzerinde bulunan pantograf sisteminden oluşmaktadır. Lokomotifin ihtiyaç duyduğu elektrik enerjisi pantograf üst bölgesi ile katener telinin teması sonucunda sağlanmaktadır. Temas sırasında birçok nedenden dolayı arklar oluşmaktadır. Oluşan arklar elektrik enerjisinin sağlıklı aktarılmasını engellemektedir. Lokomotifin sağlıklı bir şekilde çalışabilmesi için elektrik enerjisinin sürekli alınabilmesi gerekmektedir. Bu nedenle pantograf katener sistemi elektrikli trenler için oldukça kritik bileşenlerdir. Bu çalışmada, pantograf katener sistemi için model ve ark tespiti için yeni bir yöntem önerilmektedir. Görüntü işleme ve bulanık mantık tabanlı bu yöntemde, birçok farklı türde pantograf sisteminin görüntüsü kullanılmıştır. Kullanılan görüntüler üzerinde Canny kenar çıkarımı yapıldıktan sonra Hough dönüşümü ile doğrular elde edilmektedir. Elde edilen doğruların bazı özellikleri bulanık mantığın giriş verileri olarak kullanılmaktadır. Bulanık mantık sonucunda pantograf sisteminin modeli tespit edilmektedir. Tespit edilen pantograf modeli kullanılarak pantograf temas bölgesinde oluşan arklar tespit edilmektedir.Anahtar Kelimeler: Pantograf-Katener sistemi, Pantograf model tespiti, Pantograf ark tespiti, görüntü işleme, bulanık mantık.Arc detection approach using fuzzy logic based pantograph model for pantographcatenary systems ABSTRACT Electric trains are now widely used, is an important transport modes. Compared with other types of transportation, the effect of an electric train power consumption and environmental pollution are less. There are also many advantages such as comfort and safety. One of the most important tools used in the electric train is pantograph catenary system. Pantograph catenary system consists of two parts. a catenary system along the railway line and the pantograph system consists placed on the locomotive. The locomotive's electrical energy needs are provided as a result of contact with the upper region of the pantograph and catenary wire. Arcs can occur for many reasons during the contact. The arcing in the electrical energy in a healthy way hinders the transfer. Locomotive must be received continuous electrical energy to function in a healthy way. Therefore, the pantograph catenary system are quite critical components for electric railway. In this study, a new method to model and arc detection for pantograph catenary system is proposed. In this image processing and fuzzy logic based method, images of many different types of pantograph system are used. After Canny edge extraction on the images, the lines are obtained by the Hough transform. Some properties...

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Time and frequency characterization of radiated disturbance in telecommunication bands due to pantograph arcing

Cited by 28 publications

References 23 publications

Advances of research on high-speed railway catenary

Advances of research on high-speed railway catenary

A Novel Method for Calculating the Radiated Disturbance From Pantograph Arcing in High-Speed Railway

Pantograf-Katener Sistemler için Bulanık Mantık Tabanlı Belirlenen Pantograf Modeli Kullanılarak Ark Tespiti Yaklaşımı

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