CN-122014585-A - Multistage pump cooperative variable flow control method and system based on edge calculation

CN122014585ACN 122014585 ACN122014585 ACN 122014585ACN-122014585-A

Abstract

The application discloses a multistage pump cooperative variable flow control method and a multistage pump cooperative variable flow control system based on edge calculation, which are applied to the technical field of edge calculation, and provide basic data for subsequent load prediction by acquiring real-time operation parameters and environment parameters of a second stage pump group in a cooling system; the method comprises the steps of inputting real-time operation parameters and environment parameters into a preset load prediction model, determining target operation parameters of a second-stage pump set, including the number of started pump sets and the operation frequency, calculating linkage control parameters of a first-stage pump set matched with the output flow of the second-stage pump set based on the target operation parameters of the second-stage pump set, ensuring flow coordination between the two-stage pump sets, and synchronously adjusting the operation states of the first-stage pump set and the second-stage pump set according to the target operation parameters and the linkage control parameters so as to enable the total flow of the first-stage pump set and the total flow of the second-stage pump set to tend to be consistent. Therefore, the application has the advantages of improving the energy efficiency and the running economy of the system.

Inventors

LIU DINGHUA
LIU HAOJUN
LIU YAOZONG

Assignees

广州市昊铭数字科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The utility model provides a multistage pump cooperation variable flow control method based on edge calculation for cooling system, cooling system includes first stage pump group and second stage pump group, its characterized in that, the method includes the step: s1, acquiring real-time operation parameters and environment parameters of a second-stage pump set in the cooling system; S2, inputting the real-time operation parameters and the environment parameters into a preset load prediction model, and determining target operation parameters of the second-stage pump set, wherein the target operation parameters comprise the number of pump set opening and the operation frequency; S3, calculating linkage control parameters of a first-stage pump group matched with the output flow of the second-stage pump group based on the target operation parameters of the second-stage pump group; and S4, synchronously adjusting the running states of the first-stage pump set and the second-stage pump set according to the target running parameters and the linkage control parameters so as to enable the total flow of the first-stage pump set to be consistent with the total flow of the second-stage pump set.
2. The edge calculation-based multistage pump cooperative variable flow control method of claim 1, wherein the real-time operation parameters comprise flow, inlet and outlet water temperature and pressure of the second stage pump group, and the environmental parameters comprise outdoor weather parameters.
3. The method for controlling the cooperative variable flow rate of a multistage pump based on edge calculation according to claim 1, wherein step S2 comprises: S21, inputting the real-time operation parameters and the environment parameters into the load prediction model to perform forward load prediction to obtain a terminal load demand value; S22, carrying out reverse reasoning operation according to the end load demand value, and determining the starting number and the running frequency of the second-stage pump group.
4. The method for controlling the cooperative variable flow rate of a multistage pump based on edge calculation according to claim 3, wherein the step S3 comprises: s31, calculating the total output flow of the second-stage pump set under the end load demand value according to the starting number and the running frequency of the second-stage pump set; And S32, calculating a flow balance point of the first-stage pump set under the same load requirement by taking the total output flow as a reference, and taking the number of opening pump sets and the operating frequency corresponding to the flow balance point as the coordinated control parameters.
5. The method for controlling the cooperative variable flow rate of a multistage pump based on edge calculation according to claim 1, wherein step S4 comprises: and S41, adjusting the power output of the first-stage pump set and the second-stage pump set in real time according to the target operation parameter and the linkage control parameter so as to eliminate unbalanced flow of a bypass pipeline in the cooling system and maintain the unbalanced flow within a preset threshold range.
6. The multistage pump collaborative variable flow control method based on edge calculation according to claim 1 is characterized in that the cooling system further comprises a cooling pump and a water chilling unit, wherein the first-stage pump group comprises a freezing first-stage pump, and the freezing first-stage pump, the cooling pump and the water chilling unit are connected in a one-to-one correspondence manner so that each water chilling unit can independently perform variable flow operation; The second-stage pump set adopts a redundant design, and comprises an operation pump and at least one standby pump, wherein the operation pump meets the normal operation requirement of the cooling system; the cooling system further comprises a cooling tower system, and the cooling tower system adopts a grouping parallel connection design so as to perform grouping maintenance on each group of cooling towers under the condition that the cooling system is not stopped.
7. The method for controlling the cooperative variable flow rate of the multistage pump based on the edge calculation according to claim 6, wherein the water chilling unit comprises a cold storage fixed frequency double-station unit and a direct cooling unit, and the method further comprises the steps of: S5, when the tail end cold load exceeds a preset load threshold value or the direct cooling unit fails, controlling the cold accumulation fixed-frequency double-station unit to be connected to a direct cooling pipe network for cooling; the cooling system also comprises a cold accumulation tank, and the method also comprises the following steps: S6, in the off-peak electricity price period, controlling the cold accumulation fixed-frequency double-station unit to accumulate cold, and storing the cold in the cold accumulation tank; And S7, releasing the cold in the cold accumulation tank in the peak electricity price period.
8. The method for controlling the cooperative variable flow rate of a multistage pump based on edge calculation according to claim 1, wherein the cooling system is controlled by a distributed edge calculation system architecture, the distributed edge calculation system architecture comprises energy management software and edge calculation modules respectively corresponding to a chiller, a first stage pump group, a second stage pump group, a cooling pump, a cooling tower and a cold storage tank, and the method further comprises the steps of: s8, carrying out local data processing and logic control through each edge computing module; And S9, performing global energy optimization management through the cooperation of the energy management software and the edge computing modules.
9. The method for controlling the cooperative variable flow rate of a multistage pump based on edge calculation according to claim 8, wherein step S8 comprises: s81, establishing a synchronous clock reference between the first-stage pump set and the second-stage pump set; s82, generating a prediction control sequence containing the evolution trend of the running state in a future preset period according to the target running parameter and the linkage control parameter; s83, synchronously distributing the prediction control sequence to edge computing modules corresponding to the first-stage pump group and the second-stage pump group; And S84, when data packet loss or delay occurs in a communication link between the edge computing modules, each edge computing module autonomously executes local control output according to the evolution trend in the predictive control sequence so as to keep the flow cooperation of the first-stage pump set and the second-stage pump set during abnormal communication.
10. A multistage pump cooperative variable flow control device based on edge calculation, the device comprising: The parameter acquisition module is used for acquiring real-time operation parameters and environment parameters of a second-stage pump set in the cooling system; The load prediction module is used for inputting the real-time operation parameters and the environment parameters into a preset load prediction model and determining target operation parameters of the second-stage pump set, wherein the target operation parameters comprise the number of pump set starting units and the operation frequency; The linkage calculation module is used for calculating linkage control parameters of the first-stage pump group matched with the output flow of the second-stage pump group based on the target operation parameters of the second-stage pump group; And the cooperative regulation module synchronously regulates the running states of the first-stage pump set and the second-stage pump set according to the target running parameter and the linkage control parameter so as to enable the total flow of the first-stage pump set to be consistent with the total flow of the second-stage pump set.

Description

Multistage pump cooperative variable flow control method and system based on edge calculation Technical Field The invention relates to the technical field of edge calculation, in particular to a multistage pump cooperative variable flow control method and system based on edge calculation. Background With the rapid development of modern industry, especially large buildings and data centers, there are increasing demands on the stability, energy efficiency and operating costs of the cooling system. The technology of a primary pump and a secondary pump in a chilled water system of a central air conditioner is subjected to multiple innovations and optimizations from a traditional constant-speed water pump system to an intelligent variable-frequency control system, and the technological advances remarkably improve the energy efficiency and the reliability of the system. However, in actual operation, how to realize the cooperative variable flow control between the primary pump and the secondary pump in the cooling system is still a technical problem to be solved. In the prior art, a primary pump usually adopts fixed frequency operation, and a secondary pump adopts variable frequency operation, so that the accurate flow matching between two stages of pump sets is difficult to realize in the operation mode. The problem that results from this is that the bypass line in the cooling system is prone to high-flow bypass phenomena, so-called excess-and-deficiency high-flow bypass discomfort. This unbalanced flow not only results in a significant energy loss and reduces the overall energy efficiency of the system, but may also affect the stability and comfort of the end chilling effect. In addition, conventional control strategies often have difficulty in maximizing cooling efficiency and minimizing cooling costs when dealing with complex load changes and external environmental parameters. Therefore, the industry has long been challenged to further improve the energy efficiency and the operation economy of the system by precisely and cooperatively controlling the number and the frequency of the primary pump and the secondary pump to eliminate the unbalanced flow of the bypass pipeline. In view of the above, there is a need in the art for improvements. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide a multistage pump cooperative variable flow control method and a multistage pump cooperative variable flow control system based on edge calculation, which solve the problems of unbalanced flow and energy loss of a bypass pipeline caused by difficult accurate matching of the flows of a first-stage pump and a second-stage pump in the prior art and have the advantages of improving the energy efficiency and the operation economy of the system. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In a first aspect, a method for controlling a cooperative variable flow rate of a multistage pump based on edge calculation is used for a cooling system, the cooling system includes a first stage pump group and a second stage pump group, and the method includes the steps of: s1, acquiring real-time operation parameters and environment parameters of a second-stage pump set in the cooling system; S2, inputting the real-time operation parameters and the environment parameters into a preset load prediction model, and determining target operation parameters of the second-stage pump set, wherein the target operation parameters comprise the number of pump set opening and the operation frequency; S3, calculating linkage control parameters of a first-stage pump group matched with the output flow of the second-stage pump group based on the target operation parameters of the second-stage pump group; and S4, synchronously adjusting the running states of the first-stage pump set and the second-stage pump set according to the target running parameters and the linkage control parameters so as to enable the total flow of the first-stage pump set to be consistent with the total flow of the second-stage pump set. Further, the real-time operating parameters include flow, inlet and outlet water temperature and pressure of the second stage pump set, and the environmental parameters include outdoor weather parameters. Further, step S2 includes: S21, inputting the real-time operation parameters and the environment parameters into the load prediction model to perform forward load prediction to obtain a terminal load demand value; S22, carrying out reverse reasoning operation according to the end load demand value, and determining the starting number and the running frequency of the second-stage pump group. Further, step S3 includes: s31, calculating the total output flow of the second-stage pump set under the end load demand value according to the starting number and the running frequency of the second-stage pump set; And S32, calculating a flow balance point of