The existing plant-level load distribution strategies focus on mathematical model rather than the basis of load distribution

namely the coal consumption curve. Quadratic fitting for coal consumptions at multiple load points is usually applied in the conventional methods. Combining with an ultra supercritical 1 000 MW unit of which the feedcoal property differs dramatically

this paper analyzed the effect of pulverizing systems on coal consumption. On this basis

the load section was divided and the coal consumption performance of each sub interval was represented by corresponding quadratic function. Moreover

the new coal consumption curve was compared with the plant-level AGC coal consumption curve which is applied to most power plants. The results show that this new curve is better than the conventional curves in terms of both accuracy and trend

and is reliable as the basis of plant-level AGC load distribution.