Linear active disturbance rejection control modeling method for axial power distribution of large pressurized water reactor

Abstract

The invention discloses a linear active disturbance rejection control modeling method for axial power distribution of a large pressurized water reactor, and belongs to the field of electric digital data processing. The method comprises the steps: firstly, performing model transformation by adopting an original nonlinear model to obtain a second-order nonlinear model for active disturbance rejection controller design; designing a corresponding LESO, and exporting LESO gain parameters by adopting a pole assignment method; determining an LESO bandwidth parameter omega o based on the second-ordermodel time scale and the total disturbance term time scale; determining a PD bandwidth omega c range by adopting the maximum possible deviation and the maximum allowable action speed of the executingmechanism, and setting a proportional gain and a differential gain based on the omega c; and setting an LESO bandwidth parameter omega o and a PD controller bandwidth omega c, and determining that thereactor power control system completes active disturbance rejection control. According to the method, the problems of nonlinearity, parameter uncertainty and external disturbance faced by the axial power distribution control design of the large pressurized water reactor are solved, and the real-time control requirement is met.

Description

technical field [0001] The invention belongs to the technical field of electrical digital data processing, in particular to a linear active disturbance rejection control modeling method for axial power distribution of a large pressurized water reactor. Background technique [0002] The nuclear power plant unit is a highly complex nonlinear system, involving multiple control factors such as operating power, nuclear fuel burnout degree, and control rod value. Special consideration must be given to these factors when large power fluctuations occur under load following conditions. [0003] The axial power distribution of PWR is affected by various factors such as control rod position, inlet coolant temperature, axial xenon oscillation, etc., and its control system is required to have strong anti-interference ability; large-scale pressurized water reactor axial xenon oscillation convergence Poor, the axial power distribution control system is required to have higher stability. ...

AI Technical Summary

Problems solved by technology

The operator's workload is heavy and the control effect is not good; when the load changes greatly, the control performance may deteriorate seriously

How to solve the problem of poor high-speed multi-channel data acquisition ability in the existing technology, the inability to implement complex control algorithms and signal processing, and poor real-time performance, resulting in serious delays in control objects has become a key issue to consider

[0005] In response to this problem, we proposed a linear active disturbance rejection control system and method for axial power distribution of large pressurized water reactors. Not only the PXI controller used can realize real-time control of the control object, but also solved the problem of software control methods. Delay problem; reduce the burden on the analog computer and meet the requirements of real-time control

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