Power quality concerns of unit commitment of main transformers for DC electrified urban railway systems
Shahnia, F., Sarhangzadeh, M. and Haque, M.T. (2005) Power quality concerns of unit commitment of main transformers for DC electrified urban railway systems. In: International Conference on Power Electronics and Intelligent Control for Energy Conservation (PELINCEC) 2005, 16 - 19 October 2005, Warsaw, Poland
The power quality problems of DC electrified urban railway systems are discussed for the unit commitment situations on the main transformers of the traction substations. Utilizing unit commitment and the transformer planning procedure for an electrified traction system which is applied to derive the optimal transformer capacity to meet the annual peak demand and provide reserve for service reliability, minimizes the overall cost of main transformers over the life cycle. On the other hand, some power quality problems are caused or even emphasized due to the natural characteristics of the traction system. The dynamic programming method of unit commitment is done in MATLAB where its results are the input data for the rest of our power quality investigation procedure. The power quality characteristics of the traction system are then studied and verified through the simulation results done with PSCAD/EMTDC software.
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