Optimal Feedback Control Of Large Pressurized Water Reactor Core System Based On Bilinear System

As a complex nonlinear time-varying system,the nuclear power plant is a large system with strong correlation and high security requirements.It is critical for safe operation of a nuclear power plant to select a good control system.At present,the design of control system of nuclear reactor is generally based on classical control theory,describing the nuclear reactor system with the transfer function model.In this paper,the design method of modern control theory is selected to describe the nuclear reactor system by using the state space model and research the dynamic performance of pressurized water reactor by modeling and control of bilinear system.Bilinear system is one of the simplest nonlinear systems with linear state variables and control variables,in which the nonlinear term is composed of the product of the state variables and control variables.The system is controlled by the control variables by means of superposition item and product item respectively,which is obviously superior to the linear system only controlled by the superposition item in the control effect.In this paper,the dynamic state equation and the temperature feedback equation of equivalent delayed neutron point and reactor of single set is selected to establish the linear and bilinear model of the nuclear reactor core by using the state space model.In a group of typical working conditions,the change in important parameters of rector disturbed in the dynamic process of two simulation models can prove that bilinear model has higher stability and reliability and is able to better describe the reactor core system.Combined with the optimization theory,the optimal linear and bilinear controllers are designed for the reactor core system.The simulation results show that the bilinear controller has better control effect and satisfactory research results on the control of the reactor.