In order to adapt to domestic power grid dispatching mode

plant-level optimal load control method under automatic generation control(AGC)instruction was put forward.Moreover

on the basis of the original D200system of 4×300MW coal fired units in Guodian Fengcheng Power Plant

aplant-level AGC control system was constructed through upgrading the soft and hardware devices.The application results showed that

according to the coal consumption rate

adjustment range

operation condition and other performance parameters of each unit

this AGC control system can distribute the whole plant's load automatically and reasonably

making the coal saving rate reduced to 0.2%to 0.3%.