Research On AGC Optimization Control Strategy of Large Thermal Power Unit

The boiler main steam pressure in unit generator has large inertia and lag characteristic.Aiming at the characteristic of the controlled object,this paper applied the state variable technique and the phase compensating technique to the steam pressure control strategy,which was based on direct energy balance.The large inertia and lag characteristic of the controlled object can be compensated and load adaptive ability can be improved by using large-lag compensation technique.Furthermore,some measures had been taken to improve the control characteristic of the power unit.The simulation results have shown that this control strategy is effective.