Directing against the problems existing in control system of 320 MW units in Beihai Power Plant

such as the coordinated control of units and automatic control of the forced draft fan(relating to oxygen quanlity) were unable to normally put into service during the time of start-up and shutdown for the coal pulverizer

and in the sootblowing process by using the boiler steam excited wave

large fluctuation of the main steam temperature

and bad behavior of automatic control for water-level in the drum of boiler

etc.

the control system has been optimized by using OPT-K software package.The automatic setting of conventional PID and the state observor constructed by introducing up-to-date control theory make the putting-into-operation rate of automatic control system and its regulating quality to be remarkable enhanced

solving the problems of large water-level fluctuation in boiler drum

as well as large disturbance of steam temperature etc.

the putting-into-operation situation of coordinated control between turbines and boilers being good.