Abstract:

Abstract:According to the delay characteristic of deaerator liquid level control system and flow disturbance of deaerator inlet and outlet,with the
advantages combined with single pulse and three impulse,this paper brings a single pulse combining three impulse strategy that based on the single of deaerator liquid level and the single of deaerator inflow and outflow volume serving as basis of material balance.It also brings about the method of regulating valve output control based on control mode and switching method of different load and main condensation water.This control strategy overcomes delay and disturb problem in the system and remake the balance between quick response time after load changing and low overshoot.The control effect is superior to the single pulse method which only lie on liquid level singnal.

Key words: Keywords:deaerator liquid level, three impulse control mode, mode switching, valve position output control.