Design of Coal Quality Disturbance Free System for Coordinated Control System Based on Gain Scheduling
The economic and stable operation was affected seriously by coal quality disturbance for power plants. Based on model analysis, influence of the disturbance can be considered as gain change of control system. Power capability coefficient of coal was constructed to inhibit it. Accuracy of the coefficient was verified by operating data. Then coal quality disturbance free system based on gain scheduling was designed for coordinated control system. Simulation showed that, the strategy improved control quality obviously, and inhibited the coal quality disturbance. Keywords—coordinate control system, coal quality disturbance, energy coefficient of coal quality, gain scheduling
Effects and Policies of the Change of Coal Quality on Coal-fired Boiler
This article introduced the effects on 4×300 MW boiler of Taiyuan First Thermal Power Plant because the type to the coal is not suitable of the design.It analyzed the effects on the boiler because of the change of the coal,introduced the sorts of typical problems because of change of the coal type and offered some effective policies to solve the problems.
DRUM BOILER DYNAMIC MODEL AND LOAD/PRESSURE INCREMENT PREDICT MODEL
This paper introduces one kind of drum type boiler dynamic model structure, which considering the system nonlinearity. The dynamic model structure is introduced, and we bring forward the equations, which can solve the uncertain parameters. In order to construct the new Coordinated Control System (CCS) system, the dynamic equations predicting load/pressure increment are introduced. A new discoupling method then is introduced based on those equations. The simulations have illustrated the efficiency of the dynamic model and the performance of the new CCS system.