Monitoring Energy and Power Quality On Board Train

Crotti, G.; Giordano, D.; Signorino, Davide; Femine, Antonio Delle; Gallo, Daniele; Landi, C.; Luiso, Mario; Biancucci, Alfredo; Donadio, L.

doi:10.1109/amps.2019.8897794

Cited by 13 publications

(14 citation statements)

References 10 publications

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“…By looking at Figure 4f, it can be observed that for the first 3 s (265 to 268 s) the train has been stationary (probably waiting on a station), characterized by low traction current with significant distortion. A high level of distortion when trains are near stations has previously been observed in [43]. After the stationary phase, the train has started and accelerated for approximately 2 to 3 s (268 s to 270 s), leaving the station (confirmed by the very low train speed of 27 km/h reported in [35]).…”

Section: Results Of the Proposed Methodsmentioning

confidence: 59%

A Novel Arc Detection Method for DC Railway Systems

et al. 2021

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Electric arcing due to contact interruption between the pantograph and the overhead contact line in electrified railway networks is an important and unwanted phenomenon. Arcing events are short-term power quality disturbances that produce significant electromagnetic disturbances both conducted and radiated as well as increased degradation on contact wire and contact strip of the pantograph. Early-stage detection can prevent further deterioration of the current collection quality, reduce excessive wear in the pantograph-catenary system, and mitigate failure of the pantograph contact strip. This paper presents a novel arc detection method for DC railway networks. The method quantifies the rate-of-change of the instantaneous phase of the oscillating pantograph current signal during an arc occurrence through the Hilbert transform. Application of the method to practical pantograph current data measurements, demonstrates that phase derivative is a useful parameter for detecting and localizing significant power quality disturbances due to electric arcs during both coasting and regenerative braking phases of a running locomotive. The detected number of arcs may be used to calculate the distribution of the arcs per kilometre as an alternative estimation of the current collection quality index and consequently used to assess the pantograph-catenary system performance. The detected arc number may also contribute to lowering predictive maintenance costs of pantograph-catenary inspections works as these can be performed only at determined sections of the line extracted by using arcing time locations and speed profiles of the locomotive.

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Section: Results Of the Proposed Methodsmentioning

confidence: 59%

A Novel Arc Detection Method for DC Railway Systems

et al. 2021

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“…To this aim the signals are mostly studied in the time domain using a reference simulation model for confirmation. The measuring setup was preliminarily described in [27] [28]: although the uncertainty assessment has not be completed yet, the used instrumentation and the care in grounding, shielding and EMC in general during the installation indicate that the uncertainty will be dominated by the voltage and current probes.…”

Section: Application To DC Railwaysmentioning

confidence: 99%

Filter Transients onboard DC Rolling Stock and Exploitation for the Estimate of the Line Impedance

Mariscotti¹,

Giordano

Femine

et al. 2020

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Power supply transients in dc railways related to filter charging may trigger network and filter oscillatory responses, as well as cause very fast voltage spikes. These phenomena are relevant not only for Power Quality and EMC, but also for their impact on the measured pantograph quantities e.g. for power and energy consumption estimate. The broadband excitation of the system gives the possibility of attempting the identification of the network impedance. The experimental results are discussed and compared to the output of a circuit and a distributed parameter simulator. Matching between simulated and experimental data is very good.

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“…The measurement set-up is described in [1]. The actual chopped current Ia-chop and Ib-chop is measured directly at the BR resistors Ra and Rb.…”

Section: On-board Measurement Systemmentioning

confidence: 99%

Accurate Measurement of Energy Dissipated in Braking Rheostats in DC Railway Systems

Brom¹,

Giordano²,

Gallo³

et al. 2020

Preprint

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This paper describes the measurement system used to monitor the energy dissipated in the braking rheostat resistors on board a locomotive operating in a DC rail system. The aim of the activity is the accurate estimation of the energy, nowadays wasted, that could be recovered thanks to the implementation of the smart grid paradigm in the DC railway system. To provide metrological reliability to the measured wasted energy, a preliminary identification and estimation of the uncertainty is provided. The target uncertainty of the measurements is 1 %.

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Monitoring Energy and Power Quality On Board Train

Cited by 13 publications

References 10 publications

A Novel Arc Detection Method for DC Railway Systems

A Novel Arc Detection Method for DC Railway Systems

Filter Transients onboard DC Rolling Stock and Exploitation for the Estimate of the Line Impedance

Accurate Measurement of Energy Dissipated in Braking Rheostats in DC Railway Systems

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