A system for electric power dispatching plan and maintenance management is developed to meet the need of power network dispatching management in the environment of power market.

Through the introduction on the technique features of the digital substation,this paper analyzes the revolution in the operation management,maintenance management,special management limit and security issues caused by the digital substation,presents the corresponding solutions to solve the problems.

Aiming at transmission equipment development present situation,it analyzes overhaul management and its existent problem of transmission equipment,and proposed the necessity to change transmission equipment overhaul period management pattern and its the countermeasure.