Effects of earthing systems on stray current for corrosion and safety behaviour in practical metro systems

Alamuti, Mohsen Mohammadi; Nouri, Hassan; Jamali, S.

doi:10.1049/iet-est.2010.0029

Cited by 55 publications

(32 citation statements)

References 8 publications

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“…Çift yönlü beslenme durumunda her iki yönden besleme gerçekleşmekte olup bu tip beslemede cer gücü iki uçtan paylaşımlı olarak beslenmektedir. Bu tip besleme sistemi DC beslemeli demiryollarında daha yaygın olarak kullanılmaktadır (Takagi, 2012), (Alamuti, Nouri, & Jamali, 2011), (Tzeng & Lee, 2010), (Lao, Wong, Dai, Liu, & Wong, 2013), (Jia, Yang, Lin, & Fang, 2014), (Ibrahem, Elrayyah, Sozer, & Abreu, 2017), (Ogunsola, Sandrolini, & Mariscotti, 2015), (Calderaro at al., 2015).…”

Section: Materyal Ve Metodunclassified

The Comparison of the ANN and SVM Methods for the Prediction of Voltage Drop on a Subway Line

Kocaarslan

Akçay²,

Akgündoğdu³

et al. 2018

Uluslararası Muhendislik Arastirma Ve Gelistirme Dergisi

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Bu çalışmada, 1500 V DC beslemeli bir raylı sistemde cer gücünün meydana getirdiği gerilim düşümünün maksimum değeri Yapay Sinir Ağları (YSA) ve Destek Vektör Makineleri (DVM) yardımıyla belirlenmiştir. YSA ve DVM yöntemleriyle hatta oluşan gerilim düşümü işletmesel parametrelere bağlı olarak hesaplanmıştır. YSA ve DVM teknikleri açıklanarak elde edilen sonuçlar karşılaştırılmıştır. YSA modeli için levenberg marquardt (LM) algoritması kullanılmıştır. Levenberg-Marquardt algoritması yapay sinir ağlarının eğitiminde sağladığı hız ve kararlılık nedeni ile tercih edilmektedir. Raylı sistemlerde elektrifikasyon sistemi işletmesel verilere ve hat parametrelerine bağlı olarak tasarlanmaktadır. Elektrifikasyon sistemi oluşturulurken işletme esnasında cer gücünün gereksinimi olan minimum besleme gerilim değerinin sağlanması gerekmektedir. Cer gücü geriliminin en düşük değerini hatta oluşan gerilim düşümünün en yüksek değeri belirlemektedir. Bu değerin işletme sürekliliği için belirli limitler içinde tutulması gerekmektedir. Benzetim için tek yönlü ve çift yönlü beslenme durumlarına ait oluşturulan veriler incelenmiştir. Bu çalışma ile demiryolu elektrifikasyon sistemine ait cer gücü simülasyonuna ait sonuçlar yapay zeka yoluyla tahmin edilmektedir. Bu sayede sisteme ait değişkenler farklı olsa dahi tekrar tekrar benzetim yapılmasının önüne geçilmektedir. Tasarlanan sistem ile %95 üzeri başarı oranı elde edilmiştir.

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Section: Materyal Ve Metodunclassified

The Comparison of the ANN and SVM Methods for the Prediction of Voltage Drop on a Subway Line

Kocaarslan

Akçay²,

Akgündoğdu³

et al. 2018

Uluslararası Muhendislik Arastirma Ve Gelistirme Dergisi

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“…Reducing the distances between traction substations is another measure that can be taken for controlling stray current. However, this solution increases the construction cost, so the optimum placement of traction substations should be carried out based on peak service conditions (Alamuti et al, 2012).…”

Section: Stray Current Sourcesmentioning

confidence: 99%

A review on stray current-induced steel corrosion in infrastructure

2017

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Metallic corrosion can cause substantial damage at various levels and in almost all types of infrastructure. For metallic corrosion to occur, a certain external environment and the presence of corrodents are the prerequisites. Stray current-induced corrosion, however, is a rather underestimated issue in the field of corrosion and civil engineering. Stray current arising from power sources and then circulating in metal structures may initiate corrosion or even accelerate existing corrosion processes. The most frequent sources of stray current are light rail transits and subways, which are also main traffic tools with continuously accelerating urbanization all over the world. Stray currents from these systems may easily flow into nearby metallic structures, making stray current-induced corrosion the most severe form of damage of buried structures, such as tunnels, pipelines, and various underground reinforced concrete structures. The objective of this paper is to critically review stray current-induced steel corrosion in infrastructure with regard to sources of stray current and the characteristics and mechanism of stray current corrosion in view of electrochemical aspects. The methods and techniques for the evaluation, monitoring, and control of stray current-induced corrosion for steel and reinforced concrete structures are also presented and discussed.

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“…This power can be used by other vehicles or the transformer station [27]. Figure 5 shows the traction forcespeed graph of the Turkish State Railways (TCDD) ROTEM vehicle with a power of 5 MVA [28].…”

Section: Algorithm Developed For Different Vehicle Driving Modesmentioning

confidence: 99%

Creation of a dynamic model of the electrification and traction power system of a 25 kV AC feed railway line together with analysis of different operation scenarios using MATLAB/Simulink

Kocaarslan¹,

Akçay²,

Ulusoy³

et al. 2017

Turk J Elec Eng & Comp Sci

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Abstract:In this study, the simulation of an electrification system and traction power system of a 25 kV AC feed railway line was performed with all its subcomponents using MATLAB/Simulink. The power flow theory was used while modeling the railway electrification system. The transformer substation, catenary, rail, and vehicle were modeled together with the operational data. This model is used in order to determine the number of transformers, the distance of feeding centers, and the frequency of trips. The optimum design of electrification projects depends on these criteria.A dynamic structure was created with a new algorithm developed for vehicle load characteristics. The simulation of the electrification system and traction power system is performed before the analysis stage, together with the vehicle and other design parameters. This analysis is performed for the best performance of the systems. In this study, the power simulation of the railway was conducted for three different operation scenarios using MATLAB/Simulink.

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Effects of earthing systems on stray current for corrosion and safety behaviour in practical metro systems

Cited by 55 publications

References 8 publications

The Comparison of the ANN and SVM Methods for the Prediction of Voltage Drop on a Subway Line

The Comparison of the ANN and SVM Methods for the Prediction of Voltage Drop on a Subway Line

A review on stray current-induced steel corrosion in infrastructure

Creation of a dynamic model of the electrification and traction power system of a 25 kV AC feed railway line together with analysis of different operation scenarios using MATLAB/Simulink

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