Coordination control device of large-scale CFB (circulating fluidized bed) unit based on intensified combustion

The utility model provides a coordination control device of a large-scale CFB (circulating fluidized bed) unit based on intensified combustion, which comprises a load control centre loop, a steam turbine main control loop and a boiler main control loop; a novel limitation scheme is adopted by a load instruction change rate: a load coordination fuzzy control loop is adopted; the limitation on the load change rate is smoothly and gradually increased according to the degrees of a bed temperature and the main vapor pressure, which exceed the normal range; combinations of fuzzy feedforward controllers and fuzzy self-adjusting PID (proportional-integral-derivative) controllers are adopted by the steam turbine main control loop and the boiler main control loop, so a power generation load and a thermal load of the unit are jointly controlled; control rules of feedforwarad control modules are fused with experience of operation personnel and experts, and fuzzy control rules are formed according to the control quality of the boiler main control loop and the steam turbine main control, which is corresponding to different loads during operation; in the steam turbine main control loop, a fuzzy feedforward controller of load instructions is added and is combined with a fuzzy self-adjusting PID controller, so the power generation load is jointly controlled; and in the boiler main control loop, an intensified combustion fuzzy feedforward controller is additionally added.