After adopting distributed control system for electric control system(ECS) of large-scale thermal power units

awfully large change has been occurred in operational control of the electric system

but corresponding operational analysis hasn’t usually been found

this status quo being not to the benefit of enhancing the actual control level of electric system. Based on investigation of many projects' implementation and operation practice

changes of operational monitoring and manipulation for the electric system have been analysed in detail

and concrete counter-measures emphasized on perfection of its safe operation function being put forward.