Method and equipment for optimizing closing rule of valve behind pump, medium and product

Abstract

The invention discloses an optimization method and device for the closing rule of a valve behind a pump, a medium and a product, and relates to the technical field of water pump engineering.The method comprises the steps that control parameter sets corresponding to different closing rules of the valve behind the pump under the target working condition are determined; using a multi-objective optimization algorithm to determine a post-pumping valve closing rule corresponding to the optimal control parameter group as an optimal post-pumping valve closing rule; and when the pump station is in the target working condition, the optimal after-pump valve closing rule is executed. According to the method, the optimal post-pumping valve closing rule is quickly and accurately determined based on the multi-objective optimization algorithm.

Description

Technical Field

[0001] The present application relates to the field of water pump engineering technology, and in particular to a method, equipment, medium and product for optimizing the closing law of a post-pump valve. Background Art

[0002] The downstream valve of a centrifugal pump plays a crucial role in water pump engineering. During the transition process of a pump station, the valve closing pattern is crucial to the stability of the transition process. The current method for determining the downstream valve closing pattern is to sequentially calculate different patterns and then find the corresponding pattern that meets the design requirements. This method is computationally intensive and inefficient, making it difficult to quickly and accurately determine the optimal downstream valve closing pattern. Summary of the Invention

[0003] The purpose of this application is to provide a method, equipment, medium and product for optimizing the closing law of the post-pump valve, which can quickly and accurately determine the optimal closing law of the post-pump valve.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a method for optimizing the closing regularity of a post-pump valve, comprising:

[0006] Obtain the target operating conditions of the pumping station;

[0007] Determine the control parameter groups corresponding to the closing rules of the valves after different pumps under the target working conditions;

[0008] The multi-objective optimization algorithm is used to determine the closing rule of the post-pump valve corresponding to the optimal control parameter group as the optimal post-pump valve closing rule;

[0009] When the pump station is in the target operating condition, the optimal post-pump valve closing rule is executed.

[0010] Optionally, obtain the target operating conditions of the pump station, including:

[0011] Obtain working condition parameter groups corresponding to different pending working conditions;

[0012] Input the working condition parameter groups corresponding to different undetermined working conditions into the pump station simulation model in sequence to determine the runaway working condition in the undetermined working condition;

[0013] Determine any runaway condition as the target condition.

[0014] Optionally, the operating condition parameter group includes: volute pressure, inlet and outlet water pipe pressures and unit speed.

[0015] Optionally, before obtaining the operating condition parameter groups corresponding to different pending operating conditions, the method further includes:

[0016] Build a pump station simulation model.

[0017] Optionally, the post-pump valve closing law includes: a post-pump valve straight line closing law curve, a post-pump valve "first slow then fast" broken line closing law curve, and a post-pump valve "first fast then slow" broken line closing law curve.

[0018] Optionally, the control parameter group includes: total closing time of the post-pump valve, turning point time, turning point position, fast closing time, slow closing time and the number of branch holes / surge wells.

[0019] Optionally, the optimal control parameter group corresponds to a maximum reference value;

[0020] The reference values ​​are:

[0021] Z=α×P1+β×P2+γ×P3+δ×P4+ε×P5;

[0022] Among them, Z is the reference value, α is the unit speed correlation coefficient, P1 is the maximum unit speed, β is the volute outlet pressure correlation coefficient, P2 is the maximum volute outlet pressure, γ is the inlet pipe pressure correlation coefficient, P3 is the maximum inlet pipe pressure, δ is the outlet pipe pressure correlation coefficient, P4 is the maximum outlet pipe pressure, ε is the valve correlation coefficient, and P5 is the maximum pressure before the valve.

[0023] In a second aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned method for optimizing the closing rule of the post-pump valve.

[0024] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for optimizing the closing rule of the post-pump valve.

[0025] In a fourth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the above-mentioned method for optimizing the closing rule of the post-pump valve.

[0026] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0027] This application provides a method, device, medium, and product for optimizing the closing pattern of post-pump valves. These methods determine the control parameter groups corresponding to different post-pump valve closing patterns under target operating conditions. A multi-objective optimization algorithm is used to determine the post-pump valve closing pattern corresponding to the optimal control parameter group as the optimal post-pump valve closing pattern. When the pump station is in the target operating condition, the optimal post-pump valve closing pattern is implemented. The use of a multi-objective optimization algorithm reduces a large amount of calculations and improves optimization efficiency. Adjusting control parameters to accommodate different design requirements has broad applications in the engineering field and can be applied to other operating conditions after modification, facilitating its application and promotion in engineering practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a flow chart of a method for optimizing the closing rule of the post-pump valve in one embodiment of the present application;

[0030] Figure 2 This is a schematic diagram of a method for optimizing the closing rule of the post-pump valve in one embodiment of the present application; DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] In an exemplary embodiment, Figure 1 and Figure 2 As shown, a method for optimizing the closing law of the post-pump valve is provided, comprising:

[0034] Step 101: Obtain the target operating conditions for the pump station. Step 101 includes: constructing a pump station simulation model; obtaining operating condition parameter groups corresponding to different pending operating conditions. The operating condition parameter groups corresponding to the different pending operating conditions are sequentially input into the pump station simulation model to determine the runaway operating condition among the pending operating conditions. Any runaway operating condition is determined as the target operating condition. The operating condition parameter group includes: volute pressure, inlet and outlet water pipe pressures, and unit speed.

[0035] The target optimization working condition can be determined based on the simulation model of the pump station. Through experimental calculation, the dangerous working conditions that may occur during the operation can be determined, and the dangerous working conditions to be optimized can be determined as the target optimization working conditions, including: setting different working condition parameters; determining control parameters including volute pressure, inlet and outlet pipe pressure and unit speed; calculating the control parameters under the runaway working condition according to the closing rule of the initial post-pump valve; and determining the runaway working condition as the target optimization working condition based on the control parameters under the runaway working condition.

[0036] In this description, the runaway operating conditions that may occur during the operation of the pump station are identified as the target optimization operating conditions. Through a series of operations, the optimal pump-post valve closing pattern under the target optimization operating conditions is selected to ensure that the pump station can still ensure safety when it is in the runaway operating condition. An initial pump-post valve closing pattern is selected. Under the runaway operating condition, the system is operated according to different set operating parameters. The maximum values ​​of the unit speed, the maximum volute outlet pressure, and the maximum inlet and outlet water pipe pressure corresponding to the initial pump-post valve closing pattern are obtained. The reference values ​​are obtained through relevant calculations, and the runaway operating condition with the operating parameters with the largest reference value is selected as the target optimization operating condition.

[0037] Step 102: Determine the control parameter groups corresponding to different closing rules of the post-pump valve under the target working conditions. The control parameter groups include: the total closing time of the post-pump valve, the turning point time, the turning point position, the fast closing time, the slow closing time, and the number of branch holes / surge wells;

[0038] The control parameters under the specified target optimization conditions are calculated according to different closing rules of the post-pump valve.

[0039] Operate according to preset requirements, determine the linear closing regularity curve of the valve after the pump, record the total closing time of the valve after the pump, the maximum speed of the unit, the maximum pressure at the volute outlet, the maximum pressure at the inlet and outlet pipes, and the maximum pressure before the valve;

[0040] Calculate the control parameters under the target optimization working condition according to the linear closing law curve of the valve after the pump;

[0041] Operate according to preset requirements, determine the "slow first then fast" broken line closing regularity curve of the valve after the pump, record the total closing time of the valve after the pump, turning point time and position, fast closing time and slow closing time, number of branch holes or surge tanks, maximum speed of the unit, maximum pressure at the volute outlet, maximum pressure in the inlet and outlet pipes, and maximum pressure before the valve;

[0042] The total valve closing time is preliminarily planned to be 100-500s, and the total closing times of 100s, 150s, 200s, 250s, 300s, 350s, 400s, 450s and 500s are analyzed respectively.

[0043] When the total closing time is 100s, the number of branch holes or surge tanks on the line is the same, the fast closing time remains unchanged, and the slow closing time is initially planned to be 20-95s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0044] Then, when the total closing time is 100s, the number of branch holes or surge tanks on the line is the same, the slow closing time remains unchanged, and the fast closing time is initially planned to be 5-20s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0045] Afterwards, when the total closing time is 100s, the slow closing time remains unchanged, the fast closing time remains unchanged, the number of branch holes or surge tanks on the line is changed, and the operation is carried out according to the preset requirements, and the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time are recorded.

[0046] When the total closing time is 150s, the number of branch holes or surge tanks on the line is the same, the fast closing time remains unchanged, and the slow closing time is initially planned to be 20-145s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0047] Then, when the total closing time is 150s, the number of branch holes or surge tanks on the line is the same, the slow closing time remains unchanged, and the fast closing time is initially planned to be 5-20s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0048] Afterwards, when the total closing time is 150s, the slow closing time remains unchanged, the fast closing time remains unchanged, the number of branch holes or surge tanks on the line is changed, and the operation is carried out according to the preset requirements, and the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time are recorded.

[0049] The steps for total shutdown time of 200s, 250s, 300s, 350s, 400s, 450s, and 500s are the same as above.

[0050] Calculate the control parameters under the target optimization working condition according to the "slow first then fast" broken line closing regular curve of the valve after the pump;

[0051] Operate according to preset requirements, determine the "fast first, slow later" broken-line closing regular curve of the valve after the pump, record the total closing time of the valve after the pump, turning point time and position, fast closing time and slow closing time, number of branch holes or surge tanks, maximum speed of the unit, maximum pressure at the volute outlet, maximum pressure in the inlet and outlet pipes, and maximum pressure before the valve;

[0052] The total valve closing time is preliminarily planned to be 100-500s, and the total closing times of 100s, 150s, 200s, 250s, 300s, 350s, 400s, 450s and 500s are analyzed respectively.

[0053] When the total closing time is 100s, the number of branch holes or surge tanks on the line is the same, the slow closing time remains unchanged, and the fast closing time is initially planned to be 5-20s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0054] Then, when the total closing time is 100s, the number of branch holes or surge tanks on the line is the same, the fast closing time remains unchanged, and the slow closing time is initially planned to be 20-95s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0055] Afterwards, when the total closing time is 100s, the fast closing time remains unchanged, the slow closing time remains unchanged, the number of branch holes or surge tanks on the line is changed, and the operation is carried out according to the preset requirements, and the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time are recorded.

[0056] When the total closing time is 150s, the number of branch holes or surge tanks on the line is the same, the slow closing time remains unchanged, and the fast closing time is initially planned to be 5-20s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0057] Then, when the total closing time is 150s, the number of branch holes or surge tanks on the line is the same, the fast closing time remains unchanged, and the slow closing time is initially planned to be 20-145s. Operate according to the preset requirements and record the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time.

[0058] Afterwards, when the total closing time is 150s, the fast closing time remains unchanged, the slow closing time remains unchanged, the number of branch holes or surge tanks on the line is changed, and the operation is carried out according to the preset requirements, and the unit speed, volute outlet pressure, inlet and outlet water pipe pressure and valve front pressure at each time are recorded.

[0059] The steps for total shutdown time of 200s, 250s, 300s, 350s, 400s, 450s, and 500s are the same as above.

[0060] The control parameters under the target optimization working condition are calculated according to the "first fast then slow" broken line closing regular curve of the valve after the pump.

[0061] Step 103: Using a multi-objective optimization algorithm, determine the optimal control parameter set corresponding to the post-pump valve closing pattern as the optimal post-pump valve closing pattern. The post-pump valve closing patterns include: a post-pump valve linear closing pattern curve, a post-pump valve "slow first, then fast" broken-line closing pattern curve, and a post-pump valve "fast first, then slow" broken-line closing pattern curve.

[0062] Step 104: When the pump station is in the target operating condition, the optimal pump valve closing rule is executed. The optimal control parameter group corresponds to the largest reference value. Remove outliers; use the multi-objective optimization algorithm to calculate the reference values ​​of the control parameters of different pump valve closing rules respectively, and calculate the reference values ​​according to the maximum speed of the unit, the maximum pressure at the volute outlet, the maximum pressure at the inlet and outlet pipes, and the maximum pressure before the valve, in combination with the correlation coefficient; calculate the maximum reference value, and select the pump valve closing rule with the largest reference value as the optimal pump valve closing rule. The reference value is:

[0063] Z=α×P1+β×P2+γ×P3+δ×P4+ε×P5.

[0064] Among them, Z is the reference value, α is the unit speed correlation coefficient, P1 is the maximum unit speed, β is the volute outlet pressure correlation coefficient, P2 is the maximum volute outlet pressure, γ is the inlet pipe pressure correlation coefficient, P3 is the maximum inlet pipe pressure, δ is the outlet pipe pressure correlation coefficient, P4 is the maximum outlet pipe pressure, ε is the valve correlation coefficient, and P5 is the maximum pressure before the valve.

[0065] In an exemplary embodiment, a computer device is provided, which may be a server or a terminal. The computer device includes a processor, a memory, an input / output interface (I / O) and a communication interface. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for optimizing the closing law of a post-pump valve is implemented.

[0066] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0067] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0068] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0069] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0070] The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may include, but are not limited to, general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic units, data processing logic units based on quantum computing, and the like.

[0071] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for optimizing the closing rule of a post-pump valve, characterized in that: include: Obtain the target operating conditions of the pumping station; Determine the control parameter groups corresponding to the closing rules of the valves after different pumps under the target working conditions; The multi-objective optimization algorithm is used to determine the closing rule of the post-pump valve corresponding to the optimal control parameter group as the optimal post-pump valve closing rule; When the pump station is in the target operating condition, the optimal post-pump valve closing rule is executed.

2. The method for optimizing the closing rule of the post-pump valve according to claim 1, characterized in that: Obtain the target operating conditions of the pump station, including: Obtain working condition parameter groups corresponding to different pending working conditions; Input the working condition parameter groups corresponding to different undetermined working conditions into the pump station simulation model in sequence to determine the runaway working condition in the undetermined working condition; Determine any runaway condition as the target condition.

3. The method for optimizing the closing rule of the post-pump valve according to claim 2, characterized in that: The operating condition parameter group includes: volute pressure, inlet and outlet water pipe pressure and unit speed.

4. The method for optimizing the closing rule of the post-pump valve according to claim 2, characterized in that: Before obtaining the working condition parameter groups corresponding to different pending working conditions, the following steps are also included: Build a pump station simulation model.

5. The method for optimizing the closing rule of the post-pump valve according to claim 1, characterized in that: The closing rules of the valve after the pump include: a straight closing rule curve of the valve after the pump, a "first slow then fast" broken line closing rule curve of the valve after the pump, and a "first fast then slow" broken line closing rule curve of the valve after the pump.

6. The method for optimizing the closing rule of the post-pump valve according to claim 1, characterized in that: The control parameter group includes: the total closing time of the valve after the pump, the turning point time, the turning point position, the fast closing time, the slow closing time and the number of branch holes / pressure regulating wells.

7. The method for optimizing the closing rule of the post-pump valve according to claim 1, characterized in that: The optimal control parameter group corresponds to the maximum reference value; The reference values ​​are: Z=α×P1+β×P2+γ×P3+δ×P4+ε×P5; Among them, Z is the reference value, α is the unit speed correlation coefficient, P1 is the maximum unit speed, β is the volute outlet pressure correlation coefficient, P2 is the maximum volute outlet pressure, γ is the inlet pipe pressure correlation coefficient, P3 is the maximum inlet pipe pressure, δ is the outlet pipe pressure correlation coefficient, P4 is the maximum outlet pipe pressure, ε is the valve correlation coefficient, and P5 is the maximum pressure before the valve.

8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for optimizing the closing law of the post-pump valve according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for optimizing the closing law of the post-pump valve according to any one of claims 1 to 7 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for optimizing the closing law of the post-pump valve according to any one of claims 1 to 7 is implemented.

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