Active disturbance rejection control method used for fast reactor power and coolant outlet temperature

Abstract

The invention belongs to the nuclear power plant control technology field and especially relates to an active disturbance rejection control method used for fast reactor power and a coolant outlet temperature. The method comprises the following steps of establishing point reactor dynamic equation according to a neutron characteristic in a reactor, establishing the average temperature equation of afast reactor fuel and a coolant outlet temperature equation according to the law of conservation of macroscopic energy, and establishing the reaction equation of a control rod and a reactor overall reactivity equation; acquiring a fast reactor power and coolant outlet temperature second-order differential equation; designing an active disturbance rejection controller based on linear extended stateobserver; determining an extended state observer bandwidth range, and determining a PD bandwidth range by using deviation and executing mechanism motion speed allowing range; giving a coolant outlettemperature during the balance of a system and the fast reactor power during the balance of the system, carrying out LADRC parameter setting, acquiring a controller bandwidth and an observer bandwidth, determining a reactor power control system and a coolant outlet temperature control system, and completing active disturbance rejection control.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant control, and in particular relates to an active disturbance rejection control method for fast reactor power and coolant outlet temperature. Background technique [0002] Nuclear power plant units are highly complex nonlinear systems whose parameters are functions of operating power, nuclear fuel burnout and control rod values, and vary with time. Special consideration must be given to these factors when large power fluctuations occur under load following conditions. Compared with thermal reactors, fast reactors have higher enrichment, harder energy spectrum, smaller Doppler effect than thermal reactors, and the short life of prompt neutrons in fast reactors, small proportion of delayed neutrons, and reactivity disturbance The fast reactor power changes rapidly, requiring the fast reactor control system to have better transient response characteristics. Most of the existing reactors a...

AI Technical Summary

Problems solved by technology

These control algorithms have achieved certain results, but due to the shortcomings of most of them, such as complex design structure and difficulty in parameter setting, they have not been widely used in engineering applications.

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