The Reseavch And Analysis Of Coordinated Control System For Thermal Power Unit

This paper is focus on the Coordinated Control System(CCS) of the Turbine-generator unit. And it sums up the existing problems and analysis the factors that affect the control performances of the CCS. When simplifies the turbine-generator unit as a two inputs and two outputs control plant and make some reasonable hypothesis, this paper sets up a dynamic math model of the Coordinated Control System.Large unit power coordinated control system is important part to improve economic power and achieve power grid dispatching automation. The coordinated control system is a complex multi-variable control system, there is uncertain interference and nonlinear characteristics in the system, with strong coupling characteristics, and there is a considerable delay in the boiler side of the net, so the thermal power unit coordinated control system unit has great research significance.Different from the traditional coordinated control, the direct energy balance coordinated control usesthe amount of heat released from the combustion of fuel instead of the amount of fuel to control the combustion, and it is therefore not affected by the composition and dampness of coals. Through the thermodynamic analysis and phsical analysis against every basical parameters forming the DEB system, this paper looks insight the mechanism and features of DEB signals configurated from these parametes, and illustrates their principle and functions in constituting the coordinated control system, with the intention to further understand and familiarize the DEB control strategy.