Abstract:

Abstract:The coordinated control system of the 600MW supercritical oncethrough unit of Shanwei Power Plant was analyzed. The load variation rate feedforward loop for the boiler input rate (BIR) had been designed. The steam pressure corrective loop of steam turbine master control was optimized. The control strategy of the boiler master control was adjusted. A more perfect coordinated control scheme was formed. Some problems, such as that the main team pressure fluctuates greatly, there is certain delay for load increase and load decrease, the disturbance of the steam pressure near the inlet of the turbine is too large, the main steam temperature often exceeds the normal and so on, were solved. The test result shows that after the coordinated control system had been optimized, the load response ability and the safe and stable operation level of the unit were improved effectively.

Key words: Key words:coordinated control, boiler master control, steam turbine master control, temperature of intermediate point, logic optimization