Coordination control method of unit plant

The invention provides a coordination control method of a unit plant. The coordination control method of the unit plant comprises the steps that an advanced coordination controller CMPC connected with a normal coordination controller CPID in a DCS in parallel is established in an upper computer; a part closed loop test is carried out on a coordination control system under the state that the normal coordination controller CPID runs normally, model identification is carried out on a closed loop system with the output signals of the advanced coordination controller CMPC as input and with the output signals of the coordination control system as output, and the advanced coordination controller CMPC is put into the coordination control system to carry out running to carry out coordination control over the unit plant together with the normal coordination controller CPID; zero setting is carried out on the output of the upper computer when communication faults or upper computer system faults occur. According to the technical scheme, the coordination control method of the unit plant is suitable for model prediction control over coordination control over current electric power industry situations, the advantage that DCS control is high in reliability is maintained, high quality of model prediction control is introduced, and the control reliability of the coordination control system is improved.