Abstract:To solve the problem that coolant boric acid concentration is an object with large inertia and large time delay in nuclear primary circuit, an active disturbance rejection controller based on improved whale optimization algorithm is proposed.Firstly, the formula of ADRC is derived, and the key parameters' influence of ADRC on the objective function is obtained.Next, aiming at the disadvantages of too many adjustment parameters and complex engineering tuning, the whale algorithm is used to adjust the controller parameters.Then, the convergence factor is improved in whale algorithm, and the key parameters of the ADRC controller are optimized to make its fitness better.Finally, through Simulink simulation platform, the step response simulation is conducted under different working conditions.The results demonstrate that the method can realize the rapid and stable adjustment of the coolant boric acid concentration dilution in nuclear primary circuit under different working conditions, and can complete the power tracking of nuclear reactor better.