1. Disturbance observer-based robust backstepping load-following control for MHTGRs with actuator saturation and disturbances
- Author
-
Jingqi Yuan and Jiuwu Hui
- Subjects
Computer science ,business.industry ,Modular high-temperature gas-cooled reactors ,020209 energy ,Control rod ,TK9001-9401 ,Load following power plant ,Actuator saturation ,PID controller ,02 engineering and technology ,Auxiliary function ,Modular design ,Disturbance observer ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Nuclear Energy and Engineering ,Load following ,Control theory ,Backstepping ,0202 electrical engineering, electronic engineering, information engineering ,Nuclear engineering. Atomic power ,business - Abstract
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.
- Published
- 2021