Stray Current Control in DC Mass Transit Systems

Cotton, Ian; Charalambous, Charalambos A.; Aylott, P.; Ernst, Pierre

doi:10.1109/tvt.2004.842462

Cited by 140 publications

(65 citation statements)

References 3 publications

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“…Smanjenju lutajućih struja pridonosi i dobra odvodnja kolosijeka [7]. Ne pokažu li ove mjere dobre rezultate, izvodi se sustav za skupljanje lutajućih struja [8].…”

Section: Uvodunclassified

“…Sustav za skupljanje lutajućih struja ''presijeca'' put strujama koje su pronašle put iz tračnice i sprječava njihov ulazak u tlo [8]. Sastoji se od čeličnih mreža koje su razdvojene na segmente duljine oko 300 m i međusobno povezane vodičem dobre električne provodljivosti (najčešće bakrom) te spojene na negativnu sabirnicu u elektrovučnoj podstanici (slika 6.).…”

Section: Sustav Za Skupljanje Lutajućih Strujaunclassified

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Reducing stray current effect on track structure

Vranešić¹,

Lakušić²

2017

Zajednički Temelji 2017 - Peti Skup Mladih Istraživača Iz Područja Građevinarstva I Srodnih Tehničkih Znanosti - Zbornik Radova

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SažetakKorozija nastala djelovanjem lutajućih struja poznata je još od 19. stoljeća i razvoja prvih elektrificiranih željezničkih linija kod kojih se tračnice koriste kao povratni vod struje do elektrovučnih podstanica. Na mjestima oslabljene izolacije tračnice i njenog pričvrsnog pribora dio te struje istječe u tlo, beton ili drugi medij u kojemu se kolosijek nalazi i postaje lutajuća struja. Posljedice lutajućih struja manifestiraju se korozijom tračnice i pričvrsnog pribora, što može rezultirati lomovima na mjestima pričvršćenja ako se korozija ne uoči na vrijeme. Najučinkovi-tiji način sprječavanja lutajućih struja je djelovanje na izvoru struje, što je postignuto različitim metodama poput bolje izolacije tračnice i pričvrsnog pribora, manjim razmakom između elektrovučnih podstanica, osiguravanjem puta manjeg otpora za povrat struje, sustavima za prikupljanje lutajućih struja i sl. Od svih tih metoda najbolje učinke pokazuje bolja izolacija tračnice i pričvrsnog pribora. Danas su u upotrebi različite vrste pričvršćenja kod kojih se poboljšanjem izolacijskih svojstava dolazi do znatnog smanjenja istjecanja struje. U prikazu načina smanjenja lutajućih struja veoma dobre rezultate pokazuje i novi sustav pričvršćenja razvijen na Građevin-skom fakultetu u Zagrebu -Zagreb 21 CTT. Ključne riječi: lutajuće struje, kolosijek, korozija, pričvršćenja tračnicaReducing stray current effect on track structure Abstract Stray current corrosion is familiar since 19 th century and development of first electrified railway lines. In railways, tracks are used as return conductor for current to the substation. In places where tracks and fastening insulation isn't good enough, part of current leaks to the ground and becomes stray current. The consequences of stray currents are manifested by the corrosion of the rails and rail fastenings If the stray current corrosion isn't notice on time, degradation and fracture of the rails and fastening will occur. The most effective way to reduce stray current is limiting current leakage at the source, which can be achieved by various methods, including better tracks and fastening insulation, closely-spaced substations, ensuring a low-resistance path for current returning to the substation, stray current collection system etc. Of all these methods, the best results are obtained by insulating the rail and fastenings. Different types of rail fastenings are in use today. Changing their insulation properties stray current can be significantly reduced. In reducing stray current at the source, Zagreb 21 CTT -a new tram track fastening system developed at Faculty of Civil Engineering in Zagreb shows very good results.

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“…Smanjenju lutajućih struja pridonosi i dobra odvodnja kolosijeka [7]. Ne pokažu li ove mjere dobre rezultate, izvodi se sustav za skupljanje lutajućih struja [8].…”

Section: Uvodunclassified

Section: Sustav Za Skupljanje Lutajućih Strujaunclassified

Reducing stray current effect on track structure

Vranešić¹,

Lakušić²

2017

Zajednički Temelji 2017 - Peti Skup Mladih Istraživača Iz Područja Građevinarstva I Srodnih Tehničkih Znanosti - Zbornik Radova

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“…The parameters used in the simulation are determined from the available line 4 characteristic data, the available standards, references [8], [11] and division of the line into equal 100 meter cells. According to the manufacturers' data, R rr is 1650 µΩ (i.e., with 5% corrosion, the resistance per unit length of the rail is 16.5 µΩm -1 .)…”

Section: Modeling the Line And Determining The Parametersmentioning

confidence: 99%

“…"Cotton" discussed the importance of stray current reduction in DC rail transit systems and proposed usage of stray current collection mats. Also, he talked about the influences of his proposed system's performance and resistivity of soil on stray currents and the resulting corrosions [8].…”

Section: Introductionmentioning

confidence: 99%

Controlling and Simulation of Stray Currents in DC Railway by Considering the Effects of Collection Mats

Sandidzadeh¹,

Shafipour²

2012

Infrastructure Design, Signalling and Security in Railway

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“…The track may feature different constructive characteristics depending on the type of support and infrastructure (tunnel, cut & cover, viaduct, station, etc. ), and the provisions adopted for one may not be optimized for the other [3] to [5]. Moreover, such track portions shall in principle allow separate testing, with distinct values of G re .…”

Section: Introductionmentioning

confidence: 99%

Accuracy of railway track conductance and joint efficiency measurement methods

Bongiorno

Mariscotti

2015

ACTA IMEKO

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The IEC 62128-2 (EN 50122-2) indicates methods for the measurement of rail-to-earth conductance and insulating rail joint efficiency in dc electrified railways. These methods are reviewed, considering the influence of system parameters on the accuracy and variability of results. This work reports a characterization and quantification of the uncertainty and limits of validity, as well as some practical considerations on the execution of measurements

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Stray Current Control in DC Mass Transit Systems

Cited by 140 publications

References 3 publications

Reducing stray current effect on track structure

Reducing stray current effect on track structure

Controlling and Simulation of Stray Currents in DC Railway by Considering the Effects of Collection Mats

Accuracy of railway track conductance and joint efficiency measurement methods

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