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CN-121995973-A - Liquid flow regulating method, device, equipment and medium

CN121995973ACN 121995973 ACN121995973 ACN 121995973ACN-121995973-A

Abstract

The embodiment of the application discloses a liquid flow regulating method, a device, equipment and a medium, and relates to the technical field of nuclear industry. The method comprises the steps of obtaining a target liquid flow value corresponding to a current liquid flow value and N groups of preset proportional-integral-derivative PID parameters, wherein N is a positive integer greater than or equal to 2, determining a target control signal according to the target liquid flow value and the N groups of preset PID parameters when the target liquid flow difference is smaller than or equal to a preset difference threshold, wherein the target liquid flow difference is the difference between the target liquid flow value and the current liquid flow value, and adjusting the current liquid flow value according to the target control signal. Thus, accuracy of liquid flow rate adjustment can be improved.

Inventors

  • REN LIYONG
  • Dong de
  • JIANG HUI
  • DENG TIAN
  • ZHANG CHAO
  • WANG XUFENG
  • ZHOU YEXIANG
  • LI HENG
  • ZHANG LONGQIANG
  • XIAO LONGHAO
  • FAN ZIQI
  • ZHANG YI
  • Yang Yehu
  • ZHENG KAIYANG
  • WEI XINYU
  • LU CHAO
  • WANG CHUNBING
  • PING JIALIN
  • GUO JINGREN
  • Si Hengyuan
  • XING KUNPENG
  • MENG YING
  • GOU XIAOLONG
  • JIN SIQI
  • PENG JIN
  • PENG HUAQING
  • SUN PEIWEI
  • LI GONGJIE
  • CHENG CHAO
  • WEI YIZHEN
  • TAN GUOCHENG

Assignees

  • 深圳中广核工程设计有限公司
  • 中广核工程有限公司

Dates

Publication Date
20260508
Application Date
20260115

Claims (10)

  1. 1. A method of regulating a flow of a liquid, comprising: Obtaining a target liquid flow value corresponding to the current liquid flow value and N groups of preset proportional-integral-derivative PID parameters, wherein N is a positive integer greater than or equal to 2; Determining a target control signal according to the target liquid flow value and N groups of preset PID parameters when the target liquid flow difference value is smaller than or equal to a preset difference threshold value; And adjusting the current liquid flow value according to the target control signal.
  2. 2. The method of claim 1, wherein determining the target control signal based on the target liquid flow value and the N sets of the preset PID parameters comprises: acquiring N groups of N preset liquid flow values corresponding to the preset PID parameters one by one; determining the preset liquid flow value which is the same as the target liquid flow value as a first liquid flow value; and determining a first control signal corresponding to a first PID parameter as the target control signal, wherein the first PID parameter is the preset PID parameter corresponding to the first liquid flow value.
  3. 3. The method of claim 1, wherein determining the target control signal based on the target liquid flow value and the N sets of the preset PID parameters comprises: acquiring N groups of N preset liquid flow values corresponding to the preset PID parameters one by one; Determining a second PID parameter and a third PID parameter when the preset liquid flow value which is the same as the target liquid flow value does not exist, wherein the second PID parameter is adjacent to the third PID parameter, and the target liquid flow value is positioned between the second liquid flow value corresponding to the second PID parameter and the third liquid flow value corresponding to the third PID parameter; And performing weighted linear interpolation on the second control signal corresponding to the second PID parameter and the third control signal corresponding to the third PID parameter to obtain the target control signal.
  4. 4. The method of claim 1, wherein obtaining N sets of preset PID parameters comprises: Taking N working condition points in a preset flow range; And aiming at each working point, performing PID parameter setting to obtain the preset PID parameters corresponding to the working points so as to obtain N groups of preset PID parameters.
  5. 5. The method of claim 4, wherein performing PID parameter tuning comprises: and (5) performing PID parameter setting by taking overshoot and adjustment time as indexes.
  6. 6. The method according to claim 1, wherein the method further comprises: Acquiring a first mapping relation when the target liquid flow difference value is larger than the preset difference value threshold value, wherein the first mapping relation is used for representing the corresponding relation between the valve opening of the liquid flow regulating valve under different flow and the liquid flow value; determining a target valve opening corresponding to the target liquid flow value according to the first mapping relation; Based on the target valve opening, adjusting the current liquid flow value to obtain an adjusted current liquid flow value; And taking the adjusted current liquid flow value as the current liquid flow value, and jumping to a step of determining a target control signal according to the target liquid flow value and N groups of preset PID parameters under the condition that the target liquid flow difference value is smaller than or equal to a preset difference value threshold value.
  7. 7. The method according to claim 1, wherein the method further comprises: and updating the preset difference threshold according to the adjustment dead zone and the minimum adjustment quantity of the liquid flow adjustment valve.
  8. 8. A liquid flow regulating device, the device comprising: the first acquisition module is used for acquiring a target liquid flow value corresponding to the current liquid flow value and N groups of preset proportional-integral-derivative PID parameters, wherein N is a positive integer greater than or equal to 2; The first determining module is used for determining a target control signal according to the target liquid flow value and N groups of preset PID parameters when the target liquid flow difference value is smaller than or equal to a preset difference value threshold value; and the first adjusting module is used for adjusting the current liquid flow value according to the target control signal.
  9. 9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program which, when executed by the processor, implements the liquid flow regulation method of any one of claims 1 to 7.
  10. 10. A computer readable storage medium, characterized in that it has stored thereon a computer program which, when executed by one or more processors, implements the liquid flow regulation method of any of claims 1 to 7.

Description

Liquid flow regulating method, device, equipment and medium Technical Field The present application relates to the technical field of nuclear industry, and in particular, to a method, an apparatus, a device, and a medium for adjusting liquid flow. Background In the technical field of nuclear industry, particularly in the operation and control of nuclear reactors, the safe operation of a nuclear power plant is ensured by adjusting the flow of various liquids (such as boric acid and the like). For example, during operation of a nuclear power plant, boric acid make-up systems are an important component of the chemical and volumetric control systems of the nuclear power plant. The boric acid solution with the flow required by volume control or reactivity control is injected into a loop through a chemical and volume control system according to the requirement by a boric acid delivery pump, so that the boric acid concentration in the loop system is maintained at the level required by the normal operation of the nuclear power plant. If the deviation between the boric acid flow and the set value is large, the boric acid concentration and the required value of the first loop are different, and the normal operation of the first loop is affected. Therefore, how to improve the accuracy of liquid flow rate adjustment of boric acid and the like is a problem to be solved in the art. Disclosure of Invention In view of the above, an object of the present application is to provide a method, apparatus, device and medium for adjusting liquid flow, which can improve the accuracy of liquid flow adjustment. In order to achieve the above purpose, the technical scheme of the application is realized as follows: in a first aspect, an embodiment of the present application provides a method for adjusting a liquid flow, including: Obtaining a target liquid flow value corresponding to the current liquid flow value and N groups of preset proportional-integral-derivative PID parameters, wherein N is a positive integer greater than or equal to 2; Determining a target control signal according to the target liquid flow value and N groups of preset PID parameters when the target liquid flow difference value is smaller than or equal to a preset difference threshold value; the current liquid flow value is adjusted in accordance with the target control signal. In one possible embodiment, determining the target control signal based on the target liquid flow value and the N sets of preset PID parameters includes: acquiring N preset liquid flow values corresponding to N groups of preset PID parameters one by one; Determining a preset liquid flow value which is the same as the target liquid flow value as a first liquid flow value; and determining a first control signal corresponding to the first PID parameter as a target control signal, wherein the first PID parameter is a preset PID parameter corresponding to the first liquid flow value. In one possible embodiment, determining the target control signal based on the target liquid flow value and the N sets of preset PID parameters includes: acquiring N preset liquid flow values corresponding to N groups of preset PID parameters one by one; Determining a second PID parameter and a third PID parameter under the condition that the preset liquid flow value which is the same as the target liquid flow value does not exist, wherein the second PID parameter is adjacent to the third PID parameter, and the target liquid flow value is positioned between the second liquid flow value corresponding to the second PID parameter and the third liquid flow value corresponding to the third PID parameter; And performing weighted linear interpolation on the second control signal corresponding to the second PID parameter and the third control signal corresponding to the third PID parameter to obtain a target control signal. In one possible implementation, obtaining N sets of preset PID parameters includes: Taking N working condition points in a preset flow range; And aiming at each working point, setting PID parameters to obtain preset PID parameters corresponding to the working point so as to obtain N groups of preset PID parameters. In one possible implementation, obtaining N sets of preset PID parameters includes: Taking N working condition points in a preset flow range; And aiming at each working point, setting PID parameters to obtain preset PID parameters corresponding to the working point so as to obtain N groups of preset PID parameters. In one possible embodiment, the method further comprises: under the condition that the target liquid flow difference value is larger than a preset difference value threshold value, a first mapping relation is obtained, wherein the first mapping relation is used for representing the corresponding relation between the valve opening of the liquid flow regulating valve under different flow values and the liquid flow value; Determining a target valve opening corresponding to the target l