Aiming at the problem that it is difficult to quantify the subjective and objective weights of each index in transmission network planning

an evaluation method of transmission network planning scheme which combines improved analytic hierarchy process

CRITIC（CRiteria Importance Through Intercriteria Correlation） method and TOPSIS（Technique for Order Preference by Similarity to Ideal Solution） is proposed. Firstly

the subjective and objective weights of each index are calculated by the improved analytic hierarchy process and CRITIC method respectively and the comprehensive weights are obtained by combining the two weights. Then

the relative closeness coefficient between each planning scheme and the ideal solution is calculated by using TOPSIS

which is taken as the measurement standard to realize the sorting of planning schemes. This method that comprehensively considers the subjective and objective weights effectively utilizes the objective information of index data and takes full account of the important role of subjective evaluation and decision in the actual network planning. The effectiveness of the proposed evaluation method is verified by the typical IEEE Garver-6-bus system

which is commonly used in the transmission network planning.