On the basis of analyzing the single-row configuration control characteristics of the forced draft fan

induced draft fan

primary air fan

air preheater

turbine-driven feedwater pump and booster fan in ultra-supercritical 2×660 MW units in Bulian Power Plant

several functions of the control system were designed

including the hardware system

real-time online intelligent diagnosis

boiler main protection and interlock protection for auxiliary equipments.The redundant configuration was added in thermodynamic measuring points of the auxiliary equipments.Application of this control method in the above 660 MW units show that

the monitoring function

protection function and adjusting function of the control system were stable

unit trip and boiler shutdown caused by auxiliary faults never occurred

thus the safety and stability of unit operation can be ensured.