Control the capacity of coal-fired thermal power plants based on the boilerturbine coordinated structure

Abstract

The paper focuses on designing and controlling the capacity of coal-fired thermal power plant according to the
Coordinated Control structure. The goal of that structure is to build a control system that can follow the set point
and save fuel. The solution suggested in the paper is that the fuel flow control system should have a setpoint of
the total required heat with the fuel characteristic element. This system is combined with steam pressure control
loop to regulate noises of process that occurs in the boiler. The power control loop gives a signal to control steam
valve of the generator turbine cluster, which is designed to have a static non-linear feedforward to compensate
the pressure. The results in comparison with the other two control structures show that the designed coordinated
control system is more advantageous: higher quality, better in following the setpoint, and lower fuel
consumption.