Both the modeling and the load regulation capacity prediction of a supercritical\npower plant are investigated in this paper. Firstly, an indirect identification\nmethod based on subspace identification method is proposed. The obtained\nidentification model is verified by the actual operation data and the\ndynamic characteristics of the system are well reproduced. Secondly, the model\nis used to predict the load regulation capacity of thermal power unit. The\npower, main steam pressure, main steam temperature and other parameters\nare simulated respectively when the unit load is going up and down. Under\nthe actual constraints, the load regulation capacity of thermal power unit can\nbe predicted quickly.
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