Title :
Load flow analysis and future development study for an AC electric railway
Author :
Raygani, Saeid Veysi ; Tahavorgar, Amir ; Fazel, Seyed Saeed ; Moaveni, Bijan
Author_Institution :
Dept. of Electr. Railway Eng., Iran Univ. of Sci. & Technol., Tehran, Iran
fDate :
9/1/2012 12:00:00 AM
Abstract :
This study presents a forward/backward sweep (FBS) load flow method for AC autotransformer (AT)-fed electrical railway networks considering dynamic movement of trains. Field measurements of Tehran-Golshahr suburban railway are compared with simulation results. Moreover, effects of the time headway reduction on this suburban railway and its transmission power supply system are investigated. Then, to minimise power losses, two methods of the reactive power compensation are studied; the pulse-width-modulated (PWM) trains and a static var compensator (SVC). For the aforementioned cases, fluctuations of the displacement factors (DISF), defined in p-q-r theory are simulated at the point of common coupling (PCC). MATLAB software is used for programming and simulations.
Keywords :
autotransformers; compensation; load flow; railway electrification; reactive power control; static VAr compensators; traction power supplies; AC autotransformer; AC electrical railway network; DISF; PCC; PWM train; SVC; Tehran-Golshahr suburban railway; displacement factor; dynamic train movement; forward-backward sweep; load flow analysis; p-q-r theory; point of common coupling; pulse width modulation; reactive power compensation; static var compensator; transmission power supply system;
Journal_Title :
Electrical Systems in Transportation, IET
DOI :
10.1049/iet-est.2011.0052
