| Title |
An Analysis on the Stability of the Electric Vehicles Connected Power System According to Charging Cost with Price Elasticity |
| Authors |
김준혁(Kim, Junhyeok) ; 김주락(Kim, Joorak) ; 김철환(Kim, Chulhwan) |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.9.1577 |
| Keywords |
EV ; Charging price ; ToU ; DR |
| Abstract |
Now we are facing severe environmental issues such as global warming. Due to these, the concerns about eco-friendly energy have been increased. Kyoto protocol and Copenhagen climate change conference are circumstantial evidence of it. With these trends, the interests for the Electric Vehicles(EVs) which do not emit any harmful gases have gradually been raised. Unfortunately, however, massive connection of EVs to the power system could cause negative impacts such as voltage variations, frequency variations and increase of demand power. To prevent the mentioned issues, KEPCO adopts Time-of-Use(ToU) price for EVs charging. Nevertheless, it is important to verify the propriety of the charging system. In this paper, therefore, we used pre-introduced price elasticity concept to predict possible Demand Response(DR) on charging of EVs. And analyzed possible demand power increase according to various price elasticities. Simulation results show that given ToU based charging system would not enough to control the increase of demand power by EVs on the power system. It is concluded, therefore, additional methods and/or algorithms are required. |