Novel indicator system and evaluation strategy for charging security of electric vehicle

In recent years, electric vehicles show explosive growth. Evaluation of electric vehicle charging security is of great significance for power grid and electric vehicles. This paper firstly establishes a comprehensive indicator system for electric vehicle charging security from three aspects, which consisted of power grid security, charging facility security and communication security. Then, a new security evaluation strategy is put forward. Concretely, analytic hierarchy process (AHP) method and entropy weight (EW) method are introduced to get reasonable weights of each indicator. After that, via the correlation degree index obtained by the grey correlation analysis (GRA) method, evaluation principles of the security level of EV charging are put forward. Finally, based on two different cases, the effectiveness of the proposed indicator system and evaluation strategy is verified.