EMC analysis including receiver characteristics - pantograph arcing and the instrument landing system

Geise, Robert; Kerfin, Oliver; Neubauer, Björn; Zimmer, Georg; Enders, Achim

doi:10.1109/isemc.2015.7256342

Cited by 18 publications

(9 citation statements)

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“…Electrified transportation systems may represent a significant source of radiated electromagnetic emissions with peculiar mechanisms of emissions [1][2][3][4][5][6], considering disturbance to both circuits and services within the right-of-way [7][8][9][10][11][12][13][14][15], and more generally to the "outside world" [16,17]. The intensity of electromagnetic field emissions and equipment exposed, and potentially interfered with may vary depending on the frequency interval.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, other radio services serve specific purposes of guidance and control, implementing often safety-related functions, such as Instrumental Landing System [3] and DVOR (Doppler Very-high-frequency Omni Range), guiding with direction and distance information for aircraft landing, for both en route and take off. For railways and metros there is a significant effort beyond CBTC to exploit more modern Long Term Evolution (LTE) between 450 MHz and 2 GHz (basically using optimized code handbooks and multiple antennas managed by smart algorithms [36]).…”

Section: Introductionmentioning

confidence: 99%

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Critical Review of EMC Standards for the Measurement of Radiated Electromagnetic Emissions from Transit Line and Rolling Stock

Mariscotti

2021

Energies

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Accurate and comprehensive methods for the assessment of radiated electromagnetic emissions in modern electric transportation systems are a necessity. The characteristics and susceptibility of modern victim signaling and communication radio services, operating within and outside the right-of-way, require an update of the measurement methods integrating or replacing the swept frequency technique with time domain approaches. Applicable standards are the EN 50121 (equivalent to the IEC 62236) and Urban Mass Transport Association (UMTA) with additional specifications from project contracts. This work discusses the standardized methods and settings, and the representative operating conditions, highlighting areas where improvements are possible and opportune (statistical characterization of measurement results, identification and distinction of emissions and line resonances, and narrowband and broadband phenomena). In particular for the Electromagnetic Compatibility (EMC) assessment with new Digital Communication Systems, the characterization of time distribution of spectral properties is discussed, e.g., by means of Amplitude Probability Distribution and including time distribution information. The problem of determination of site and setup uncertainty and repeatability is also discussed, observing on one hand the lack of clear indications in standards and, on the other hand, the non-ideality and intrinsic variability of measurement conditions (e.g., rolling stock operating conditions, synchronization issues, and electric arc intermittence).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Critical Review of EMC Standards for the Measurement of Radiated Electromagnetic Emissions from Transit Line and Rolling Stock

Mariscotti

2021

Energies

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“…An electric arc, as anticipated, is a source of electromagnetic emissions and disturbance [7] [8], both conducted and radiated, impacting the power quality of the line [12] as well as the measurement of electrical quantities [12]- [15] and radio systems for signalling and communications [16]- [19]. An electric arc, as with any other steep transient, is not a standalone event; rather, it is a broadband excitation for the entire electric traction system and triggers other conducted phenomena, such as resonances, oscillations, and overvoltages.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of Pantograph Arcs and Transient Conducted Phenomena in DC Railways

Mariscotti

Giordano

2020

ACTA IMEKO

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<p class="Abstract">An electric arc is an example of a transient event that is quite common in electrified transportation systems as by-product of the current collection mechanism. As a broadband transient, an electric arc excites a wide range of (often oscillatory) responses related to the substation and onboard filters, as well as the line resonances and anti-resonances. Similarly do the charging of onboard filter and other related inrush events. This work considers the electrical characteristics of these transients and of the excited responses in order to define their typical spectral signatures in DC railways and take them into account concerning their impact on Power Quality measurements and the measurements of instruments deployed onboard.</p>

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“…The waveform of the pantograph arcing looks like high-frequency pulse width modulation and such a transient process could last for a fraction of a second [14]. The electromagnetic radiated interference caused by pantograph-catenary arcing has been analyzed, and solutions in the arcing detection method and the sensitivity to components have been presented [15][16][17]. A laboratory test platform was built to verify both the arcing characteristic and the detection method [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A Supercapacitor-Based Method to Mitigate Overvoltage and Recycle the Energy of Pantograph Arcing in the High Speed Railway

Xu¹,

Chen²,

Cheng³

et al. 2019

Energies

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The pantograph arcing phenomenon may shorten the service life of a pantograph and even destroy onboard devices and instruments, due to the irregular motions of the train and the intermittent line–pantograph disconnection. This paper points out that abrupt inductive energy from the magnetizing inductance of the traction transformer can lead to an electromagnetic transient process with unexpected overvoltage across it. Further, a supercapacitor-based power electronic system is proposed, which can not only redirect the inductive energy to the supercapacitor pack through bidirectional converters but also mitigate the overvoltage across the main electrical equipment when pantograph arcing occurs. Simulation results show the overvoltage could be reduced and the energy stored in the supercapacitor which could also be used to provide energy for sensors or other devices.

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EMC analysis including receiver characteristics - pantograph arcing and the instrument landing system

Cited by 18 publications

References 1 publication

Critical Review of EMC Standards for the Measurement of Radiated Electromagnetic Emissions from Transit Line and Rolling Stock

Critical Review of EMC Standards for the Measurement of Radiated Electromagnetic Emissions from Transit Line and Rolling Stock

Experimental Characterization of Pantograph Arcs and Transient Conducted Phenomena in DC Railways

A Supercapacitor-Based Method to Mitigate Overvoltage and Recycle the Energy of Pantograph Arcing in the High Speed Railway

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