Research On Coordinated Control Of Integral Reactor

Integrated reactor is required to be operated in many different conditions, particularly, inthe frequently changing conditions or large range of working load conditions, it is required tobe able to quickly respond and to guarantee the safety of its operations. Due to themathematical model’s uncertainty, nonlinear characterstic and the strong coupling parameters,it is difficult to achieve the requirements of the control load with disturbance. Therefore, thisthesis sets up an integrated reactor, an once-through steam generator, and a steam turbinemathematical models based on the structure and characteristics of the integrated reactor, andassociates the model into an integrated reactor simulation system which will be studied on inthe future. The variable of each system simulation curves shows that the dynamiccharacteristics of the system is in accordance with the integrated reactor characteristics, thesimulation system can be regarded as a control method of the object which can be used tostudy the dynamic characteristics of the relevant variables and the coordinated controltechnology.Based on the integrated reactor simulation system established, this thesis chooses themethod of classic PID control, single neuron adaptive PID control and fuzzy self-tuning PIDcontrol to make dynamic simulation control. By observing and comparing the graphs and dataobtained from the simulation experiments, the selected control method is able to reflect thedynamic characteristics of the reactor, the reliability and operability better.For the features of reactor power control system and steam generator feedwater flowcontrol system, this thesis makes choice of single neuron adaptive PID controller. For thefeatures of the turbine speed control system, fuzzy element self-tuning PID controller isselected. Through the coordinate control theory, the two intelligent controllers in the localcontrol are used to design an integrated reactor simulation second coordinated control systemto simulate the system with load changes. The simulation curves show that the introduction ofcoordinated control technology makes nuclear reactor power fast track turbine load change and the steam generator feedwater flow and export steam flow match. The dynamiccharacteristics of the whole system have been significantly improved with higher reliability.