Robust nonlinear control for nuclear reactors using sliding mode observer to estimate the xenon concentration
Robust nonlinear control for nuclear reactors using sliding mode observer to estimate the xenon concentration
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DOI：
10.1007/s41365-016-0050-5
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发表时间：
2016-04
影响因子：
2.8
通讯作者：
G. Ansarifar;H. Akhavan
中科院分区：
文献类型：
--
作者：
G. Ansarifar;H. Akhavan
本文介绍了核反应堆滑模控制器的研究结果。核电厂的重要操作之一是负荷跟踪。本文设计了一种滑模控制系统对压水堆功率进行控制，该系统是一种鲁棒的非线性控制器。基于点动力学方程和6个缓发中子群对堆芯进行了模拟。考虑到中子吸收毒物和氙气浓度测量的局限性，设计了一种滑模观测器来估计其值，最后提出了一种基于滑模观测器的滑模控制方法来控制反应堆的堆芯功率。利用Lyapunov方法进行稳定性分析，保证了控制系统在较大范围内稳定。所采用的方法易于在实际应用中实现，而且滑模控制在整个输出跟踪过程中表现出所需的动态特性而不受扰动的影响。仿真结果验证了所提出的基于观测器的控制器在性能、鲁棒性和稳定性方面的有效性。
This paper presents findings on the sliding mode controller for a nuclear reactor. One of the important operations in nuclear power plants is load following. In this paper, a sliding mode control system, which is a robust nonlinear controller, is designed to control the pressurized-water reactor power. The reactor core is simulated based on the point kinetics equations and six delayed neutron groups. Considering neutron absorber poisons and regarding the limitations of the xenon concentration measurement, a sliding mode observer is designed to estimate its value, and finally, a sliding mode control based on the sliding mode observer is presented to control the core power of reactor. The stability analysis is given by means Lyapunov approach; thus, the control system is guaranteed to be stable within a large range. The employed method is easy to implement in practical applications, and moreover, the sliding mode control exhibits the desired dynamic properties during the entire output-tracking process independent of perturbations. Simulation results are presented to demonstrate the effectiveness of the proposed observer-based controller in terms of performance, robustness and stability.