On the basis of calculating the efficiency of boiler in thermal power plant by using counter-balance method

a calculation model for coal consumption deviation resulted from main operation parameters deviating from the target value has been put forward

a relation equation between variation of main operation parameters for boiler and variation of coal consumption being given

and real-time consumption deviation for main operation parameters of a 1025 t/h boiler in one power plant being calculated.Results show that the established model can more accurately caculate the coal consumption deviation resulted from boiler operation parameters deviating from the target value

the accuracy of calculation can satisfy the requirements of performance monitoring in the field.