铅冷快堆功率的线性自抗扰控制

Linear Active Disturbance Rejection Control for Lead-cooled Fast Reactor Power

快堆瞬发中子寿命短,缓发中子份额小,反应性扰动下反应堆周期较压水堆短,功率变化快,控制其功率的难度很大。因此,要求快堆的控制器具有较快的响应速度和控制精度。考虑到快堆功率控制的这些难点,本文基于线性自抗扰控制(Linear Active Disturbance Rejection Control)理论设计了分别带有模型信息和不带模型信息的两个控制器。导出了用于自抗扰控制器设计的相对功率的二阶非线性模型和对应的线性扩张状态观测器(Linear Extended State Observer)。通过调试确定了线性扩张状态观测器带宽的值。最终仿真的结果表明,两个控制器都适用于铅冷快堆(Lead-cooledFast Reactor)的功率控制,均有较快的调节速度与精度,并且加入模型信息的线性自抗扰控制器拥有更准确的总扰动估计效果,优秀的控制性能以及更良好的抗扰效果。

Since the short delayed neutron lifetime,small delayed neutron fraction of the fast reactor and its reactor period is shorter than the pressurized water reactor under reactivity disturbance,it is hard to control its power due to the rapid change. Thus,fast responding speed and control accuracy are needed for a fast reactor controller. Considering these difficulties of fast reactor power control,two controllers with and without model information are designed based on the Linear Active Disturbance Rejection Control(LADRC)theory. The second order nonlinear model of relative power and its corresponding Linear Extended State Observer (LESO)are built to design the ADRC controller. The value of LESO bandwidths are determined through debugging. The final simulation results show that both controllers are suitable for power control of Lead-cooled Fast Reactor(LFR)and have fast speed and accuracy,while the one with model information has more accurate estimate of total disturbance,better control performance and greater disturbance rejection ability.