A theoretical study on the consequence of a direct lightning strike to electrified railway system in Sweden

Theethayi, Nelson; Liu, Yaqing; Montaño, Raúl; Thottappillil, Rajeev; Zitnik, Michael; Cooray, Vernon; Scuka, V.

doi:10.1016/j.epsr.2004.11.012

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…As a future masterly proceeding of the Sri Lankan railway, they plan to electrify a 102 km distance of the existing railway network by including the 15 electric multiple units and a signaling system [26]. Direct lightning flashes and the induced surges due to cloud-cloud and cloud-air lightning can harshly influence the overhead transmission line of the electrified railway network or compromise the telecommunication system and interrupt the transmission of the railway signal via temporary malfunction, degradation, or permanent damages [27][28][29][30][31][32][33]. Therefore, a study on the spatial variability of lightning activities over the existing railway system is an essential requirement for the Sri Lanka railway as a part of the feasibility study on the proposed railway electrification network.…”

Section: Spatial Variability Of Lightning Flash Density Over the Prop...mentioning

confidence: 99%

Spatiotemporal Variability of Lightning Activity over the Railway Network in Sri Lanka with Special Attention to the Proposed Suburban Railway Electrification Network

et al. 2022

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This study is oriented towards the investigation of the spatiotemporal variability of the lightning activity over the railway network in Sri Lanka using -lightning data from 1998 to 2014 that were downloaded from the database of Lightning Imaging Sensor (LIS) onboard NASA’s Tropical Rainfall Measuring Mission (TRMM). The study has also been extended to study the lightning activity over the proposed suburban railway electrification network. GIS was used to conduct an annual and seasonal analysis of the railway network, which consists of nine major railway lines, to identify vulnerable stations and segments. The average annual lightning flash density over a 1447 km-long railway network of Sri Lanka varies between 5.08–16.58 flashes/(km2 year). The railway lines run across the western and southern regions of the country have been identified as being in areas with higher lightning activity. In comparison to other railway lines, the Kelani Valley line in the Colombo district and Colombo-Maradana to Polgahawela segment of the Mainline are particularly vulnerable to lightning activity. These areas have also been recognized as regions with higher population density. The proposed 102 km long railway electrification network in Sri Lanka is also within higher population density segments, with higher lightning flash density values between 10.55–16.53 flashes/(km2⋅year). As a result, to improve the operational efficiency of the proposed electrification network, a fully coordinated lightning protection system in accordance with the findings of this study is strongly suggested.

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Section: Spatial Variability Of Lightning Flash Density Over the Prop...mentioning

confidence: 99%

Spatiotemporal Variability of Lightning Activity over the Railway Network in Sri Lanka with Special Attention to the Proposed Suburban Railway Electrification Network

et al. 2022

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“…It has been observed that the urban environment provides a greater source of debris and detritus that may be moved during an event. Lightning can also disrupt the electrical supply systems (Theethayi et al, 2005).…”

Section: Railmentioning

confidence: 99%

The impact of climate change on urban transport resilience in a changing world

Jaroszweski

Hooper

Chapman

2014

Progress in Physical Geography: Earth and Environment

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The assessment of the potential impact of climate change on transport is an area of research very much in its infancy, and one that requires input from a multitude of disciplines including geography, engineering and technology, meteorology, climatology and futures studies. This paper investigates the current state of the art for assessments on urban surface transport, where rising populations and increasing dependence on efficient and reliable mobility have increased the importance placed on resilience to weather. The standard structure of climate change impact assessment (CIA) requires understanding in three important areas: how weather currently affects infrastructure and operations; how climate change may alter the frequency and magnitude of these impacts; and how concurrent technological and socio-economic development may shape the transport network of the future, either ameliorating or exacerbating the effects of climate change. The extent to which the requisite knowledge exists for a successful CIA is observed to decrease from the former to the latter. This paper traces a number of developments in the extrapolation of physical and behavioural relationships on to future climates, including a broad move away from previous deterministic methods and towards probabilistic projections which make use of a much broader range of climate change model output, giving a better representation of the uncertainty involved. Studies increasingly demand spatially and temporally downscaled climate projections that can represent realistic sub-daily fluctuations in weather that transport systems are sensitive to. It is recommended that future climate change impact assessments should focus on several key areas, including better representation of sub-daily extremes in climate tools, and recreation of realistic spatially coherent weather. Greater use of the increasing amounts of data created and captured by ‘intelligent infrastructure’ and ‘smart cities’ is also needed to develop behavioural and physical models of the response of transport to weather and to develop a better understanding of how stakeholders respond to probabilistic climate change impact projections.

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“…In order to take shielding wires into account, shielding wires are not eliminated. Three towers are set at the fault segment, and Marti frequency dependent line model is used for equivalence of the other transmission lines [12]. The system model is shown in Figure 6.…”

Section: E System Modelmentioning

confidence: 99%

Modeling and Simulation of Lightning Electromagnetic Transient and Identification of Shielding Failure and Back Striking in ±800kV UHVDC Transmission Lines - Part I: Modeling and Simulation of Lightni

Shu

Zhang

Zhu

et al. 2009

2009 Asia-Pacific Power and Energy Engineering Conference

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Lightning stroke to transmission lines was introduced in this paper. Modeling and implementation method of tower, corona and insulator for lightning electromagnetic transient research was discussed. Comprehensive model for study of UHVDC lightning electromagnetic transient was built, and lightning caused fault and lightning disturbance were simulated in PSCAD/EMTDC based on the model, which offered a research platform for identification of shielding failure and back striking in ±800kV UHVDC transmission lines.

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A theoretical study on the consequence of a direct lightning strike to electrified railway system in Sweden

Cited by 10 publications

References 25 publications

Spatiotemporal Variability of Lightning Activity over the Railway Network in Sri Lanka with Special Attention to the Proposed Suburban Railway Electrification Network

Spatiotemporal Variability of Lightning Activity over the Railway Network in Sri Lanka with Special Attention to the Proposed Suburban Railway Electrification Network

The impact of climate change on urban transport resilience in a changing world

Modeling and Simulation of Lightning Electromagnetic Transient and Identification of Shielding Failure and Back Striking in ±800kV UHVDC Transmission Lines - Part I: Modeling and Simulation of Lightni

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