철도 부하의 이동성을 반영한 변전소 정태부하모델링수립에 대한 연구

Abstract

Nowadays, it is expected that mobility loads such as electric railways and electric vehicles will be penetratedgradually and affect on the power system stability by their load characteristics. Various researches have been carried outabout electric vehicles for the recent decade though the load of electric railway could be forecasted because of the specifiedpath and timetable, is a field with a long historic background. Some precise 5th polynomial equations are required to analyzethe power system stability considering mobility load to be increased in the immediate future while the electric railwaydispatching simulator uses load models with constant power and constant impedance for the system analysis. In this paper,seasonal urban railway load models are established as the form of 5th polynomial equations and substation load modelingmethods are proposed merging railway station load models and general load models. Additionally, load management effects bythe load modeling are confirmed through the case studies, in which seasonal load models are developed for Seoul SubwayLine No. 2, Gyeongui Line and Airport Railroad and the substation load change is analyzed according to the railway loadchange.