The deaerator water heating system of thermal power plant is an important link in the boiler feedwater treatment process in thermal power plants. It has the characteristics of hysteresis

time-varying and non-linearity during the operation process and certain risk of control difficulty. Through analyzing the data of heating process of the steam-water system in the deaerator of a unit

the opening degree of the deaerator's steam heating control valve and the temperature of the deaerator's steam-water system are fitted. Combined with a time-based dynamic control technology for temperature rise of the deaerator's steam-water system

automatic start of the whole process of the deaerator's steam-water heating is realized

and the problems such as longtime consumption

low heating efficiency and difficult control in the heating process of the deaerator are solved. The result provides a reference for the automatic start of heating control strategy in the same type systems.