基于降阶状态观测器的压水堆功率自抗扰控制

发布时间：2018-10-26 20:04

【摘要】：压水堆是高度非线性、参数时变,并存在较大不确定性的被控对象,工程应用要求其控制器鲁棒性好,抗扰能力强,结构简单,参数整定方便。根据上述需求,文中给出了一种基于线性自抗扰控制的压水堆功率控制器设计方法。首先基于压水堆非线性模型推导出了用于控制器设计的相对功率的二阶非线性模型。然后设计了两种基于降阶扩张状态观测器的压水堆功率线性自抗扰控制策略,即没有模型信息和利用模型信息的情况。并运用变量代换方法避免了观测器要求输入功率的导数项,使其工程实现更容易。仿真结果表明,所设计的两种控制器均具有良好的跟踪性能和抗干扰能力。在模型引入参数时变、参数摄动、未建模动态情况下,均能取得较好的控制品质。但充分利用模型信息时控制性能和性能鲁棒性更佳。
[Abstract]:Pressurized water reactor (PWR) is a highly nonlinear, time-varying and uncertain controlled object. Engineering application requires its controller to be robust, simple in structure and convenient in parameter setting. According to the above requirements, a design method of PWR power controller based on linear ADRC is presented. First, based on the nonlinear model of PWR, the second order nonlinear model of relative power for controller design is derived. Then, two kinds of power linear ADRC control strategies based on reduced order extended state observer are designed, that is, without model information and using model information. The variable substitution method is used to avoid the derivative term of input power required by the observer, which makes the engineering implementation easier. The simulation results show that the two controllers have good tracking performance and anti-jamming ability. Better control quality can be obtained when the parameters are time-varying, parameter perturbation and unmodeled dynamic are introduced into the model. However, the control performance and performance robustness are better when making full use of model information.
【作者单位】：华北电力大学;
【基金】：国家自然科学基金项目(71301049) 中央高校基本科研业务费专项资金(2016MS39,2016MS60)~~
【分类号】：TM623.2

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