Research On Intelligent Coordinated Control System For The Generating Unit

The background of this paper is the renewal project of coordinated control system (CCS) of the 300MW-generating unit of a power plant. Based on the theory of self-adaptive fuzzy control, intelligent compound control strategy is employed in the CCS to improve the control effect and meet the request of Automatic Generation Control (AGC).In the paper, firstly, the concept of intelligent compound control system is defined, and its main research fields are summarized. With that the paper points out three heading: self-organization, self -adaptive and self-learning in the fuzzy logic control as an important domain.Secondly, the paper analyses dynamic characteristic of the boiler-turbine unit in detail, and draw a conclusion that the nonlinear feature of the boiler is the main reason to lead the variable parameter of the unit.Then two ways are presented to be used in CCS. A dynamic fuzzy decoupling compensator is constructed in the multivariable fuzzy control system; the compensator is tuned by fuzzy rule through the related coefficients. And a rule self-adaptive fuzzy controller is also presented, owning the simple structure.Finally CCS is based on the intelligent compound controller, which combined the rule self-adaptive fuzzy controller with the intelligent feed forward controller. The results of simulation and operation show the control effect is good.