The automatic dispatching system of power grid come into operation

making the unit-level automatic control system under direct dispatch mode to be constituted

the said unit-level dispatching mode can enhance the frequency quality of power grid

at the same time

owing to shortage of economic performance data concerning each unit

the economic and energy-saving dispatch among units is unable to be realized.For this

a plant-level dispatching system of seamless connection with the dispatching system of power grid

and boasting real-time calculation and closed loop control

has been developed.Results of using the said plant-level system show that the economic efficiency in operation of power plant has been substantially enhanced

the added economic loss resulted from participation of units into "peak-load regulation in the power grid" being reduced.