New Detection Method for Contact Loss of Pantograph.

Mochizuka, H.; Kusumi, Shunichi; Nagasawa, Hiroki

doi:10.2219/rtriqr.41.173

Cited by 2 publications

(4 citation statements)

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“…More traditionally, the direct byproducts of the electric arc can be looked as conducted emissions, namely pantograph voltage and current [37,[160][161][162]. Information is then extracted in various ways:…”

Section: Electromagnetic Emissionsmentioning

confidence: 99%

“…• from classification of simple spectral properties (e.g., uncommon harmonic components) to projection in more complex spaces (such as using the S-transform or wavelets [160]) by considering voltage and current waveforms; • analysis of waveform features during arc occurrence, such as zero-current intervals and jagged voltage profile [37]; • analysis of peculiar ETS responses, such as resonances, as caused by the electric arc seen as a discontinuity [161,162].…”

Section: Electromagnetic Emissionsmentioning

confidence: 99%

“…Detection, finally, is an important part for what entails verification of current collection quality and recognition of defects in the pantograph and catenary: it may involve phenomena that are not strictly electric (that form the core of this review), and, indeed, methods based on waveform distortion [37] and electromagnetic emissions [38,39] are sided by very promising techniques based on various forms of luminous emissions [40,41], including image scanning, pattern recognition and various artificial intelligence algorithms [42][43][44], that are discussed in Section 6.…”

Section: Introductionmentioning

confidence: 99%

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The Electrical Behaviour of Railway Pantograph Arcs

Mariscotti

2023

Energies

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Electric arcing is an unavoidable consequence of the current collection process by sliding contact in railways and metros, and in general in many electrified transportation systems (ETSs). The most relevant consequences in an electrical perspective are: the occurrence of transients triggering resonant behaviour and transient responses, reduction of the energy efficiency of the system, conducted and radiated disturbance, in particular for the new radio systems widely employed for signalling and communication. The involved parameters are many (type of materials, current intensity, DC and AC supply, relative speed, temperature), as well as the studied characteristics (arc instability and lifetime, dynamic behaviour, electrical system response, radiation efficiency and coupling to external radio systems). This work reports the state of the art in arc modelling, arcing experimental characterisation, interaction with the supply system, radiated emissions and disturbance to radio systems, providing a complete description of phenomena and of reference data, critically discussing similarity and differences between sources. Proposed arc models are many with different assumptions and simplifications for various applications, so that a critical review and discussion are a necessity, considering the many different approaches and not-so-obvious applicability. The comparison with experimental results highlights unavoidable discrepancies, also because of intrinsic arc variability and for the many involved parameters and operating conditions. The impact of the arc as embedded in the railway system is then considered, speaking of conducted and radiated phenomena, including interference to radio communication systems and arc detection. The most prominent effect for conducted emissions is the excitation of system resonances, including the LC filters onboard rolling stock and substations in DC railways, with consequences for disturbance and energy efficiency, and this is discussed in detail. Conversely, for high frequency emissions, the attenuation along the line circuit is significant and the effective distance of propagation is limited; nevertheless radiated electromagnetic field emissions are a relevant source of disturbance for radio systems within the ETS premises and outside (e.g., at airports). The published approaches to quantify performance reduction are discussed with emphasis on experimental methods.

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Section: Electromagnetic Emissionsmentioning

confidence: 99%

Section: Electromagnetic Emissionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Electrical Behaviour of Railway Pantograph Arcs

Mariscotti

2023

Energies

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“…In terms of traditional traffic, specific key parts with mess data need to be monitored in detail, which requires more manpower or more artificial intelligence [ 11 , 12 ]. Original 2D information cannot meet the requirements of providing enough details for automatically evaluating by computer.…”

Section: Introductionmentioning

confidence: 99%

Design of the Fall-Block Sensing of the Railway Line Pantograph Based on 3D Machine Vision Sensors

Yang

Peng

Jiang

et al. 2018

Sensors

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As an important part of the electric locomotive in railway transportation, the sensing and inspection of the pantograph has a significant effect on the safe operation of the train. In general, the pantograph carbon slip detection items include slide wear detection, slip strip crack detection, carbon slip fall-block detection and slip strip wear detection. The emergence and development of structured light measurement technology with 3D sensors provide new technical means for the acquisition of spatial 3D information. The three-dimensional data can not only obtain more information but also reduce the data deviation, thereby improving the measurement accuracy and work efficiency. At present, few studies have been conducted on the slide block and partial wear of the carbon slide. Therefore, this paper studies the detection of the pantograph slide block based on 3D sensor measurement technology. The experimental results indicate that it is feasible to adopt 3D measurement technology to detect the fall-block of the pantograph slide. In addition, a sound detection effect can also be obtained.

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New Detection Method for Contact Loss of Pantograph.

Cited by 2 publications

References 1 publication

The Electrical Behaviour of Railway Pantograph Arcs

The Electrical Behaviour of Railway Pantograph Arcs

Design of the Fall-Block Sensing of the Railway Line Pantograph Based on 3D Machine Vision Sensors

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