Preliminary frame of index system for evaluating power network

Transmission network and distribution network in the power system play different roles, so they should have different performance. Power networks can be divided into planning stage and operation stage in accordance with the time, and the information gotten in planning and operational stage is different, thus the evaluation indexes and/or evaluation method are different in the two stages. In this paper, power network evaluation indexes are divided into two major categories according to transmission network and distribution network, and in two major categories, the evaluation indexes are made further division according to the planning stage and operation stage, then a power network evaluation index system framework, which includes transmission network planning evaluation index system, transmission network after the evaluation index system, distribution network planning evaluation index system, and distribution network after the evaluation index system, is formed. And the indexes are given for the four evaluation index system.