Control device and method for rapidly reducing waste heat discharge temperature of lead-bismuth fast reactor

Abstract

The invention relates to an intelligent temperature control device and a control method for rapidly reducing a waste heat discharge temperature of a lead-bismuth fast reactor. The control device comprises a temperature sensor, a frequency conversion fan and an intelligent temperature controller, the intelligent temperature controller is a parameter self-tuning PID controller based on Smith estimation compensation and DTRNN, and the controller can ensure that the maximum temperature fluctuation difference between the waste heat discharge temperature and the temperature of external air does not exceed a threshold value delta T. The intelligent temperature controller controls the air flow of a pipeline by controlling the frequency of the variable-frequency fan at the inlet of the cold air pipeline so that the purpose of controlling the waste heat discharge temperature is achieved. According to the invention, a Smith predictor is added in the PID controller to compensate for a pure lag link existing in temperature control, the characteristic that the controller adapts to system time-varying dynamic disturbance is enhanced by utilizing the memory and dynamic feedback characteristics of a DTRNN network, high-precision control over the discharge temperature of the lead-bismuth fast reactor is achieved, and a wide application prospect is possessed.

Description

technical field [0001] The invention belongs to the technical field of waste heat discharge control, and relates to the temperature control of waste heat discharge of lead-bismuth fast reactors, in particular to a control device and method for rapidly reducing the waste heat discharge temperature of lead-bismuth fast reactors. Background technique [0002] The small-scale lead-bismuth fast reactor independently developed by China has basically met the engineering conditions, and can be used as a small-scale modular nuclear power supply for vehicles and other situations. When the small-scale lead-bismuth fast reactor is used as a vehicle-mounted mobile power supply, it is necessary to consider the rapid and stable discharge of waste heat. If a large amount of waste heat is directly discharged into the air, the ambient temperature will increase rapidly. In order to solve such problems, it is necessary to design an effective waste heat emission control system so that the waste ...

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Problems solved by technology

However, the BP neural network has problems such as easy to fall into local minimum and slow convergence speed, and the neural network model cannot well solve the influence of the large time-delay link in the temperature control system on the system.

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