Impact of Electric Vehicles on the electricity prices and on the load curves of the Iberian Electricity Market

This paper addresses the impact of the penetration of Electric Vehicles, EV´s, in the electricity market prices and on the load curves of the Iberian Electricity Market, established between Portugal and Spain. These impacts are evaluated taking the year of 2011 as reference. For every day of this year, the hourly market data was downloaded from the web site of the Iberian Market Operator and then the bid curves were adequately altered considering the commissioning of new stations under construction or planned till 2020, the planned increasing presence of wind parks and PV stations and the demand increase from end consumers. Then, the hourly demand was further increased to simulate the charging of EV´s, admitting several scenarios for the charging periods and for the number of EV´s in 2020. Using this information, the hourly selling and buying curves were altered and the hourly market price was then estimated. The paper extensively reports the results obtained for these different scenarios for the horizon of 2020. For the analysed scenarios, the results indicate that the impact of EV´s on electricity prices and load curves will depend largely on the number of EV´s and in a less significant way on the charging policy that is adopted.