基于变论域模糊PID的液态熔盐堆堆芯功率控制

Core Power Control of Liquid Molten Salt Reactor Based on Variable Universe Fuzzy-PID

液态熔盐堆堆芯系统具有非线性、时变性等特点,模糊比例积分微分(PID)控制技术因初始论域不能跟随误差变化而伸缩,使得系统的控制精度降低,故设计了一种基于变论域模糊PID控制器的堆芯功率控制策略。以熔盐增殖堆MSBR堆芯为例,在堆芯入口温度扰动或堆芯反应性扰动下,使用Matlab/Simulink对PID控制、模糊PID控制与变论域模糊PID控制下的效果进行仿真对比。结果表明,基于变论域模糊PID控制器建立的堆芯功率控制系统响应速度更快,超调量更小,控制效果更佳。

The core system of liquid molten salt reactor is with the characteristics of non-linearity and time-varying.The initial domain of the fuzzy PID control technology cannot change following the change of error,so the control accuracy of the system is deteriorated.Therefore,the core power control strategy based on variable universe fuzzy-PID controller is designed.Taking MSBR core as an example,the simulation results of PID control,fuzzy-PID control and variable universe fuzzy-PID control are compared by using Matlab/Simulink under the disturbance of core inlet temperature or reactivity.The results show that the core power control system based on variable universe fuzzy-PID controller has faster response speed,smaller overshoot and better control effect.