Temperature of feed water as well as temperature and pressue variation of superheater and reheated steam in steam-water system of the boiler all have very important effects upon standard coal consumption of the unit

for this

a model for calculating standard coal consumption deviation resulted from parameters in operation of thermal power unit deviating from the target value has been established

and the relatonship between the operation panameter in steam and water system of the boiler and the standard coal consumption being derived.By using the said model

the real-time coal consumption deviation resulted from operation parameters in steam and water system of a 1025 t/h boiler in one power plant has been calculated.The accuracy of calculated result can meet the requirments of performance monitoring in the field.