Evaluation of Electric Vehicle Charging Station in Distribution Network Planning

With electric vehicle applied generally, it will produce many influences for distribution network, which should be evaluated in planning. According to requirements of distribution network, the evaluation indicators should focus on economy and reliability. Distributed generations are developing on a large scale, making great challenge to distribution network. In this paper, the functions of electric vehicle charging station and distributed generations are expressed based on working theory. As for planning schemes, reasonable and objective evaluation indicators and evaluation method are established to choose the best one. According to Topsis with anti-entropy method, the influence of electric vehicle charging station objectively calculated by schemes' data. Based on case analysis, the increase on the number of charging stations is beneficial for charging electric vehicles, but when the number reaches a certain value, the benefits of the distribution network will be affected. Last, the whole work is concluded and some suggestions are made on future development.

I. Introduction

The development of technology promotes social progress and raises people's pursuit on quality of life, which will increase consumption of resources and cause damage of environment. In order to achieve the goal of green, environmental protection and sustainable development, distributed energy has been vigorously promoted to substitute for fossil fuel and electric vehicles have been applied as new transportation widely [1]–[3]. Due to uncertainty and randomness, it inevitably causes certain interference on distribution network when large scale of distributed generations(DG) and electric vehicles(EV) access to power grid [4], [5]. In order to enhance economical and social benefits of distribution network, it is important to pay attention on the influence of EV and DG when making planning programming.