The recycling of breaking energy in electrical railway systems and the examination in kadikoy kartal metro line

With the developed technology and rising prosperity level, the electricity consumption is increasing progressively, therewithal, our world's energy resources are being exhausted gradually. Therefore, researches for using energy more efficient and more economical have been started. Nowadays, developments of the railway transport systems have the biggest role in the development of the public transportation systems. The railway systems which have long railway lines are the biggest consumers of the energy distribution grid, according to the enormous energy amount they spend. The optimization studies in railway systems will play a big role in energy efficiency in the urban energy grid, thus, it would be beneficial to the environment and less-cost operation will be enabled. Breaking energy and recycling of this energy are one of the main parameters of the optimization studies on electric energy efficiency in electric railway transportation systems. With the recycling of breaking energy,which is generated while breaking because of the nature of the motors used in tracking of trains, the energy requirements in stations and on trains will be decreased. In this study, the generation of breaking energy, recycling of this energy and energy storage systems will be examined. Moreover, general electrical schematics of urban railway systems in Istanbul, the energy systems of the vehicles, the brake equipments, regenerating the breaking energy in a vehicle and the applications of regenerative breaking energy in Istanbul urban rail systems will be studied. Then, as an example, Kadikoy-Kartal Metro Line opened in 2012, the effects of regenerative breaking energy and storage system application will be analyzed.