In order to enhance the putting-into-operation rate of automatic control systems under abnormal operating conditions of subcritical units

such as units in run-back(RB) process

coal stoppage in coal feeders

rapid increase of back pressure in units

and high-pressure heater being out of service etc.

optimization of control systems

such as screening large deviation between commands and feedback of the actuator

large deviation between set value and measured value

switching automatically to manual control mode because of large deviation between redundant and measured values etc.

have been carried out.After optimization

the putting-into-operation rate of automatic control systems has been further enhanced

ensuring safe and stable operation of units.