This paper presents a disturbance observer-based robust backstepping load-following control (DO-RBLFC) scheme for modular high-temperature gas-cooled reactors (MHTGRs) in the presence of actuator saturation and disturbances. Based on reactor kinetics and temperature reactivity feedback, the mathematical model of the MHTGR is first established. After that, a DO is constructed to estimate the unknown compound disturbances including model uncertainties, external disturbances, and unmeasured states. Besides, the actuator saturation is compensated by employing an auxiliary function in this paper. With the help of the DO, a robust load-following controller is developed via the backstepping technique to improve the load-following performance of the MHTGR subject to disturbances. At last, simulation and comparison results verify that the proposed DO-RBLFC scheme offers higher load-following accuracy, better disturbances rejection capability, and lower control rod speed than a PID controller, a conventional backstepping controller, and a disturbance observer-based adaptive sliding mode controller.

本文针对存在执行器饱和和扰动的模块化高温气冷反应堆 (MHTGR) 提出了一种基于扰动观测器的鲁棒反步负载跟随控制 (DO-RBLFC) 方案。基于反应器动力学和温度反应性反馈，首先建立了MHTGR的数学模型。之后，构建 DO 来估计未知的复合扰动，包括模型不确定性、外部扰动和未测量状态。此外，本文采用辅助函数补偿执行器饱和度。在 DO 的帮助下，通过反步技术开发了一个鲁棒的负载跟随控制器，以提高 MHTGR 受干扰的负载跟随性能。最后，