Research On Predictive Control And Simulation On Pressurized Water Reactor Nuclear Power Plant Based On Dynamic Matrix

Nuclear power is recognized as clean energy in the world.With the successful generation of China’s third generation nuclear power unit "First Hualong",nuclear power technology is becoming more mature than before.In recent years,according to the long-term development and planning of the state in the field of nuclear power,it has become an inevitable trend to increase the proportion of nuclear power in the total power industry in order to solve the problem of power shortage,increase the installed capacity of nuclear power units.The safe and efficient development and utilization of pressurized water reactor nuclear power plant is the key to the development of nuclear power.In this thesis,the reactor power of pressurized water reactor(PWR)under AGC parallel operation mode is tracked and its control system is studied.Firstly,the thesis studies the stability and response speed of R rod position by using coolant as the control object to control reactor temperature at moderate temperature,and expounds the problems of PWR nuclear power plant in AGC mode.Secondly,the main control schemes for thermal power tracking of nuclear power plants are analyzed.By means of dynamic matrix predictive control and nonparametric modeling of coolant average temperature,the dynamic state of nuclear power plant during operation is tracked and controlled,which guarantees the stable operation of the unit.At the same time,the preconditions for stable operation of steam generator and turbine generator in PWR nuclear power plant are analyzed.On this basis,it is emphatically studied that PWR nuclear power plant can quickly and accurately adjust reactor operation parameters to minimize the error between the set value and the output value when the load changes of power grid are monitored under AGC parallel mode.Finally,the nonparametric model with the dynamic characteristics is set up,which connect R pops with the coolant average temperature.Meanwhile,the R pops movement and the effects caused by coolant average temperature change are searched.The dynamic change of each parameter is tracked,too.It is adjusted by using relevant control system and simulation in MATLAB.The research results show this method adopted in the thesis,which includes controlling reactor power system by the dynamic matrix algorithm,correcting dynamic matrix control system through the error feedback,and carrying on the simulation results in MATLAB,can improve control values and target values gap in time,and improve the tracking precision.It can satisfy any power reactor in the cases of thermal power tracking control and satisfy the thermal power tracking control of power reactor under any working condition.