A Study on Reduction of CO2 emission by Energy Storage Device in Railway Substation

초록

The railway system is 95% of regeneration system. Especially, the VVVF-Inverter vehicle has a merit of the highest regeneration rate. Energy consumption is 90% for traction and 10% for auxiliary supply. Braking energy is about 45% of energy consumption. Up to 45% of the tractive power of vehicles capable of returning energy to the power supply can be regenerated during braking and that this energy can be used to feed vehicles which are accelerating at the same time. The Korean government proposed the goal of cutting greenhouse gas emissions by 21-30 percent by 2020, relative to the ``business as usual'' (BAU) scenario. The government plans to reduce carbon emissions by the transport sector by 33-37 percent by 2020. The government also pushes ahead with developing eco-friendly transportation systems like recycling energy. Therefore, urban transit operating companies should introduce the energy storage system to save energy cost as a realistic measure. This paper analyzes about the reduction of greenhouse gas emissions of urban transit operating companies, when the ESSs are applied.