Researches on Operation Optimization of Charging Device Participating in Demand Response of Power Grid

Abstract

The application of electric vehicles has been an important mean to solve crisis of oil supplies and environment protection pressure. The number of charging devices has increased rapidly due to the orientation of policy and market in recent years. As a result, the load peak-to-valley difference will be aggravated and the electricity cost of residents will be increased. The purpose of the paper is researching the path to achieve the demand response with orderly charging of electric vehicles when a large number of electric vehicles are connected to the grid. Firstly, technological development trends of electric vehicles are analyzed. Secondly, a scheme that can uniformly manage and regulate load resources is designed by considering the charging needs of users in a comprehensive way. The core devices such as energy controller and energy router are applied in the scheme. Thirdly, a series of experiments are conducted in a residential district with 660 households and 24 charging piles in Beijing. Finally, the results indicate that the load peak-trough difference of the residential district has reduced by 58% if all of users choose to participate in demand response based on the control strategy of orderly charging.