In order to make a quantitative analysis for the operation level of communication network of distribution automation system

security evaluation model for communication network of distribution automation system based on gray relation projection theory is presented. A synthetic assessment index system including communication network reliability

invulnerability

self-healing

and adaptability is established. The subjective weights are obtained by analytic hierarchy process and the objective weights are obtained by the anti-entropy method

then integrated weight can be determined based on the addition fusion principle. Combining grey system theory and vector projection principle from the basic idea of the positive and negative ideal solution

the priority membership value of evaluating object is calculated

and the performance analysis for communication network of distribution automation system is achieved. On this basis

the sensitivity calculation formula of index value for network safety performance is deduced

which provides the reference for the decision makers to take emergency protect measures. Through analysis of a practical distribution automation system

and compared with the existing methods

the validity and the superiority of the model are verified.