熔盐堆功率自抗扰控制方法研究

Study on the method of active disturbance rejection control for molten salt reator power control

功率控制系统是反应堆的关键控制系统之一,对保证反应堆安全和稳定运行起着极其重要的作用。设计良好的熔盐堆功率控制器应具有及时的瞬态响应特性,需要简单可靠的控制方法以保证控制器的响应速度和安全性。本文基于线性自抗扰控制(Linear Active Disturbance Rejection Control,LADRC)理论设计了应用于熔盐堆(Molten Salt Reactor,MSR)的反应堆功率控制器,导出了用于自抗扰控制器设计的相对功率的二阶线性微分方程和对应的线性扩张状态观测器(Linear Extended State Observer,LESO)。最终,通过仿真得到的结果表明:该控制器模型适用于熔盐堆功率的控制,具有较快的调节速度和精度,且对测量噪声不敏感,有良好的抗扰效果。

[Background] Power control system is one of the most essential systems of reactor control, which plays an utmost role in ensuring safe and steady running of the reactor. A well-designed molten salt reactor(MSR) power controller should have better transient response characteristics, hence a simple and efficient control method is needed to ensure its responding speed and better control accuracy. [Purpose] This study aims at method of the linear lctive disturbance rejection control(LADRC) applied to MSR power control. [Methods] Based on LADRC theory, a power controller was designed for MSR. The second order nonlinear differential equation of relative power and its corresponding linear extended state observer(LESO) for ADRC design were derived. Finally, MATLAB SIMULINK was employed to simulate the performance of this control method. [Results & Conclusions] The simulation results show that the LADRC-based controller model is suitable for power control of MSR, which has the characteristics of fast respond speed, good control performance as well as insensitivity to measurement noise. Hence,the LADRC-based reactor power controller possesses great disturbance rejection ability.