Design of nonlinear adaptive power-level controller for PWR in load following operation

摘要

A nonlinear adaptive power-level controller designed by Lyapunov stability theory is proposed in this paper. The control law considers with features of nonlinearity and uncertainty associated with nuclear reactor model, and its expression can be proved via Lyapunov function directly. The values of state variables and errors between output power-level and desired power are all considered in the control law. A state observer is established to estimate the state variable values. It is theoretically proved that this advanced controller does not only guarantee the stability of globally asymptotic closed-loop but also adapt to the uncertainty of pressurized water reactor (PWR) core system. Finally numerical simulation result is given to demonstrate the feasibility of control law and relationship between the performances and controller parameters.