By Topic

Remote short-circuit current determination in DC railway systems using wavelet transform

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Chang, C.S. ; Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore ; Feng, T. ; Khambadkone, A.M. ; Kumar, S.

For effective protection of DC railway systems, it is important to discriminate the remote short-circuit current from the train starting current. Four methods for the discrimination are assessed. The first two methods apply the traditional heuristics by comparing the magnitude and the rate of change (di/dt) between the two currents. The remaining methods use the Fourier and wavelet transforms. It is shown that the first three methods do not provide consistent discrimination. The remote short-circuit current is determined mainly by the steel rail impedance, which is time varying due to the skin effect. In contrast, impedances of the traction motor and the contact wires, and the change of operating mode during starting govern the train starting current. The wavelet transform identifies these salient features. The remote short-circuit current is simulated using EMTP, and a SIMULINK model is used to obtain the train starting current

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:147 ,  Issue: 6 )