Considerations of Adaptivi Control Method of Superheater Temperature in Boiler Plant.

Abstract

The superheater temperature in a boiler plant of a thermal power station should be con-trolled with high precision in order to satisfy plant efficiency, safety and other requirements. However, it is not easy to keep the temperature constant when the power demand of the generator varies greatly. In order to support the PID control system used at present, we have developed an adaptive control system with a feedforward compensation of disturbances, varying sampling time and varying parameters, both depending upon the power demand. Through simulation study, it is shown that an adaptive control system can reduce the control error greatly.