Overview of stray current control in DC railway systems

2008 ◽  
Author(s):  
M. Niasati ◽  
A. Gholami
Keyword(s):  
Current Control ◽  
Stray Current ◽  
Railway Systems

scholarly journals Methods and instruments for stray current verification in DC rapid transit and railway systems

2021 ◽  
Vol 11 (5) ◽  
pp. 3727
Author(s):  
Andrea Mariscotti
Keyword(s):  
Transportation Systems ◽  
Rapid Transit ◽  
Electrical Parameters ◽  
Stray Current ◽  
Railway Systems ◽  
Maintenance Program ◽  
And Performance ◽  
The Right

Modern electrified transportation systems feature increasing installed power and performance and correspondingly stray current phenomena and corrosion are receiving more attention in terms of contractual specifications and request of final validation of proposed solutions, as well as a maintenance program that can actively tackle stray current issues. The problem is complex for the system physical extension, difficult measurement conditions and variability of electrical parameters. This work considers validation of stray current protection performance, in terms of track voltage, track leakage and collected current, and impressed potential on structures along the right-ofway. The exemplification of the specifications of a hypothetical instrument and setup support the discussion.

Stray Current Control in DC Mass Transit Systems

2005 ◽  
Vol 54 (2) ◽  
pp. 722-730 ◽  
Author(s):  
I. Cotton ◽  
C. Charalambous ◽  
P. Aylott ◽  
P. Ernst
Keyword(s):  
Mass Transit ◽  
Current Control ◽  
Stray Current ◽  
Transit Systems

Evaluation and Control of Stray Current in DC-Electrified Railway Systems

2017 ◽  
Vol 66 (2) ◽  
pp. 974-980 ◽  
Author(s):  
Aydin Zaboli ◽  
Behrooz Vahidi ◽  
Sasan Yousefi ◽  
Mohammad Mahdi Hosseini-Biyouki
Keyword(s):  
Stray Current ◽  
Railway Systems ◽  
Electrified Railway ◽  
And Control

Understanding Stray Current Mitigation, Testing and Maintenance on DC Powered Rail Transit Systems

2013 ◽  
Author(s):  
Saud Memon
Keyword(s):  
Current Control ◽  
Design Criteria ◽  
Light Rail ◽  
Rail Transit ◽  
Stray Current ◽  
Soil Resistivity ◽  
Transit System ◽  
Transit Systems ◽  
Testing Procedures ◽  
Transit Agencies

All direct current traction power systems using rails for return of traction current have a level of current leakage. This leakage of current is dependent on both design and operating factors affecting the efficiency of the rail return path and is referred to as stray current. Stray currents have been detected since the first electric railways were placed into operation during the latter half of the nineteenth century and have serious effects on utility structures and the neighboring infrastructure at large. Stray currents can create safety hazards thereby rendering the design of stray current mitigation an important element of the overall design of a rail transit system. Like any other design/construction project, a baseline survey is an important and significant step in the data collection and fact finding process for a light rail system. Such a survey would aid in finding the soil resistivity data and the results of the stray current levels on existing buried metal utilities. Similarly defining the design criteria for stray current mitigation, monitoring, and testing for a new light rail design project is also important. Most of the design criteria for the older rail transit systems have been developed as an aftermath of the corrosion problem and/or after the design of new extension to the system. Some older transit systems still do not have a specified design or mitigation criteria for stray current, and corrosion issues are handled as they surface and are prioritized based on severity. In the absence of guidelines, it is hard to understand the reasoning behind the limiting criteria suggested in the transit agency manuals particularly when there is no record of testing or soil resistivity investigation. For these older transit systems the limiting criterion was developed based on the information from other transit services. Having applicable design criteria for stray current control and mitigation will help standardize the process for the transit and will lower the cost of mitigation. This paper has been written by a Civil Engineer with an effort to understand the source and the scientific reasoning behind the limiting values suggested by the transit agencies associated with stray current testing procedures and its control. In order to understand the limited stray current corrosion criteria and the respective testing, various transit agencies were interviewed. These interviews were supplemented by a thorough review of the respective transit agency criteria manual/guidelines (where such information was available and accessible). Critical evaluations of the testing procedures were conducted to analyze if these tests and mitigation methods were effective.

Network switching and voltage evaluation using an expert system in ac railway systems

1992 ◽  
Vol 139 (1) ◽  
pp. 1 ◽  
Author(s):  
C.S. Chang ◽  
T.T. Chan ◽  
K.K. Lee
Keyword(s):  
Expert System ◽  
Railway Systems
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