Taking characteristics of coal consumption cost of the unit as basis

the optimal load distribution among generating units solves mainly the problem of reducing the power generation cost to a minimum value

the goal of it is not only to reduce the coal consumption to a minimum value

first of all

it is necessary to make the load variation of units in the power plant to satisfy the requirments of speed and accuracy in automatic generation control(AGC)

to enhance the quality of power supply.Secondly

in the process of varying load of unit

the frequency of load regulation should be reduced as far as possible

enhancing the stability of unit

lengthening the sevice-life of equipments for main and axiliary machines.For these

a reasonable method for load distribution among units in the whole power plant

which takes minimum coal consumption as a principle

has been studied

to realize safe

stable

and economic operation of units in the power plant.