A comprehensive analysis of thermal system for the turbo-generator set has been carried out

and a general frame consisted of three parts

namely "heat source"

"main line of the system"

and "sub-lines of the system" being condensed out

and an operation-optimizing model being established by making minimization of coal consumption for power generation as the target

and taking flow rate balance and energy balance of the thermal system as well as productive capability of the units etc. as constraint conditions. An actual analysis on 600 MW and 200 MW units has been carried out

results show that the application of said model can effectively reduce coal consumption of power generation.