Circulating water pump is the main equipment in cold end of steam turbine and the main consumer of auxiliary power

so it is necessary to optimize the operation of circulating water pump. On the basis of conventional operation optimization of circulating water pump

considering the dispatching control point and mode of power grid company for the actual output of the unit

it is concluded that after the power plant puts additional circulating water pump into operation

the grid power will be lost to a certain extent

and the plant's raw coal will be saved. Therefore

it is necessary to comprehensively consider the power plant's on grid price

coal price to the plant

value-added tax rate

power supply coal consumption and other indicators

introduce the power plant operating coefficient

and modify the results of the optimal operation of the circulating water pump. Different operation coefficients of power plants form different dividing lines of operation modes of circulating water pumps

and new optimization results are obtained. The new optimization results can more truly reflect the income of power plants

and maximize the operating income of power plants.