Rapid and fine regulation and control method and system for improving efficiency level of gas extraction pump

Abstract

The invention discloses a rapid fine regulation and control method and system for improving the efficiency level of a gas extraction pump, and relates to the technical field of gas extraction. Comprising the following steps: analyzing and constructing an efficiency evaluation coupling relational expression between the comprehensive efficiency and state parameters of the gas extraction pump; and the theoretical optimal liquid supply flow under the current working condition is determined, the maximum adjustment difference between the theoretical optimal liquid supply flow and the actual optimal liquid supply flow is calculated, and the liquid supply flow regulation and control interval is determined. The adjustment is carried out by taking the interval minimum value as the start and combining the initial adjustment step pitch of the set liquid supply flow according to the following logics: if the positive income is generated after the adjustment, the adjustment is continued based on the current step pitch until the scaling condition is met, and the adjustment is continued after the step pitch is scaled; and if no forward earnings exist, zooming the step pitch and adjusting the step pitch to the minimum step pitch, and finally taking the parameter for generating the forward earnings last time as a regulation and control target. According to the method, the gas extraction efficiency and the precision and flexibility of energy consumption optimization are improved.

Description

Technical Field

[0001] This invention relates to the field of gas extraction technology, specifically to a rapid and precise control method and system for improving the efficiency of gas extraction pumps. Background Technology

[0002] Gas drainage is a fundamental measure for the prevention and control of gas disasters in coal mines. However, it is necessary to consider not only the safety of drainage but also its high efficiency and energy saving. According to incomplete statistics, the annual electricity consumption of gas drainage systems in my country's coal mines exceeds 10 billion kilowatt-hours, but the efficiency level is extremely low, that is, the amount of gas drained per unit of electricity consumption is low.

[0003] A gas extraction system mainly includes: a gas extraction pump, an intake regulating valve, extraction pipelines, a monitoring and control system, and its auxiliary facilities. Current gas extraction control technologies all use pump motor frequency and intake valve opening as control variables to optimize extraction conditions and reduce energy consumption. Publication number CN115749689A discloses an intelligent gas extraction control method and device, which uses a model predictive control algorithm to intelligently control the gas pipeline valves and pump motor frequency to optimize the safety and economy of the extraction system. Publication number CN117514799A discloses an adaptive control method for the operating conditions of a gas extraction pump, which adjusts the pump motor frequency to control the operating conditions based on the correlation between extraction flow rate, negative pressure, and pump motor frequency, combined with the extraction matching degree index. Publication number CN115749689A discloses an intelligent decision-making control method for gas extraction pipeline networks, which establishes a flow calculation model for the extraction system and uses valve opening as a control variable to optimize the system's safety and efficiency. The following problems can be analyzed from the above methods: there are many factors affecting the performance of gas pumps, and simply relying on the adjustment of the pump motor frequency cannot bring the pump to its optimal operating efficiency level.

[0004] The performance characteristics of gas extraction pumps directly affect the efficiency of the extraction system. Factors influencing performance include extraction negative pressure and flow rate, pump motor frequency, and liquid supply flow rate. Negative pressure and flow rate must be set according to site conditions and cannot be adjusted. Therefore, the scientific control of pump motor frequency and liquid supply flow rate is crucial. However, existing technologies have not considered the coupling relationship between these two factors, and there is currently no corresponding theoretical or technical guidance for field operation, making it impossible to achieve the optimal efficiency level of the gas pump.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a rapid and precise control method and system for improving the efficiency of gas extraction pumps, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A rapid and precise control method for improving the efficiency of gas extraction pumps, comprising the following steps: S10: Obtain historical state parameter data of gas extraction pumps under different operating conditions, analyze and construct the performance evaluation coupling formula between the comprehensive efficiency of gas extraction pumps and state parameters; S20: By performing derivative analysis on the coupling relationship of the performance evaluation, the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating conditions is determined, and the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rates in the historical data is calculated and denoted as the adjustment difference. S30: Based on the theoretical optimal liquid supply flow rate and adjustment difference of the gas extraction pump under the current operating conditions, determine the adjustment range of the liquid supply flow rate of the gas extraction pump to be adjusted, and set the initial adjustment step of the liquid supply flow rate with the minimum value of the range as the starting data. S40: Adjust the liquid supply flow rate based on the set adjustment step distance. If the adjustment of the liquid supply flow rate produces a positive benefit but does not reach the maximum value of the control range, continue to adjust the liquid supply flow rate in the original direction with the current step distance until the adjusted liquid supply flow rate has no positive benefit or reaches the maximum value of the control range, then proceed to step S50. S50: Reduce the adjustment step distance by a preset ratio, mark the reduced step distance as the new adjustment step distance, determine whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop the control, and take the adjusted liquid supply flow rate that generated the most recent positive benefit as the final control target.

[0008] Furthermore, the status parameters include the motor frequency, liquid supply flow rate, extraction volume, and power consumption of the gas extraction pump. The performance evaluation coupling formula between the overall efficiency and state parameters of the gas extraction pump is as follows: ; In the formula, For the overall efficiency of gas extraction pumps This refers to the extraction rate of the gas extraction pump. The frequency of the gas extraction pump motor. The flow rate of the gas extraction pump. , c and ε are the empirical fitting coefficients, respectively. To reflect the proportionality between electrical power and liquid supply flow rate, The electrical power consumed by the gas extraction pump This is the exponential coefficient between the power and frequency of the gas extraction pump motor. This is the reference motor frequency for the gas extraction pump.

[0009] Furthermore, the method for obtaining the theoretically optimal matching liquid supply flow rate from the historical data is as follows: substitute the motor frequency of the gas extraction pump to be controlled under different operating conditions into the performance evaluation coupling formula, and perform derivative analysis of the entire performance evaluation coupling formula with respect to the liquid supply flow rate to determine the extreme point of the liquid supply flow rate corresponding to the maximum value of comprehensive efficiency under different operating conditions, and take the liquid supply flow rate corresponding to the extreme point as the theoretically optimal matching liquid supply flow rate; The actual optimal fluid supply flow rate in historical data was specifically observed and recorded through experiments; the formula used to calculate the adjustment difference is as follows: ; In the formula, To adjust for the differences, The actual optimal matching liquid supply flow rate under the i-th group of operating conditions. Let be the theoretically optimal matching liquid supply flow rate under the i-th operating condition group, where i is the index of the operating condition group. , This represents the total number of operating condition groups.

[0010] Furthermore, the liquid supply flow rate control range is specifically as follows: ,in, To determine the theoretically optimal liquid supply flow rate of the gas extraction pump under current operating conditions, the initial adjustment step of the liquid supply flow rate is calibrated as follows: .

[0011] Furthermore, the adjustment step distance is reduced by a preset ratio. The specific logic is as follows: the condition for scaling is that the liquid supply flow rate after regulation has no positive benefit or reaches the maximum value of the regulation range. During the regulation process, each time the scaling condition is detected, the step distance corresponding to the current round of adjustment is scaled once until the scaled step distance is less than the specified minimum step distance. The specific formula used to scale the step size is as follows: ; In the formula, Adjust the scaled step size for the current round. For scaling ratio, Adjust the step size for the current round, where the scaling factor is... Greater than 0 and less than 1.

[0012] Furthermore, the specific logic for determining positive returns in step S40 is as follows: S41: Obtain the extraction volume before and after the gas extraction pump's liquid supply flow rate adjustment, and determine whether the extraction volume after the liquid supply flow rate adjustment has increased compared to before the adjustment. If it has not increased, it is determined that there is no positive benefit. If it has increased, proceed to step S42. S42: Adjust the operating frequency of the gas extraction pump, determine the operating frequency when the gas extraction volume of the gas extraction pump is the target extraction volume, obtain the shaft power of the gas extraction pump before and after the operating frequency adjustment, and determine whether the shaft power after the operating frequency adjustment is reduced compared with the original value. If it is reduced, it is determined that a positive benefit is generated and the operating frequency of the gas extraction pump after the adjustment is maintained; otherwise, it is determined that there is no positive benefit. The specific logic for regulating the liquid supply flow of the gas extraction pump to be regulated is as follows: keep the motor frequency of the gas extraction pump to be regulated at a fixed value under the current operating conditions, and monitor the changes in the extraction volume of the gas extraction pump to be regulated under different liquid supply flow inputs within the liquid supply flow regulation range through experiments. Specifically, this is achieved by adjusting the water supply valve to increase the initial adjustment step of the liquid supply flow rate. Adjust the liquid supply flow rate to [the specified value]. After a 30-minute delay, the extraction volume of the gas extraction pump to be controlled during the monitoring period is obtained to determine whether positive benefits are generated and to complete the first round of adjustment.

[0013] This invention also provides a rapid and precise control system for improving the efficiency of gas drainage pumps. This system is used to execute the aforementioned rapid and precise control method for improving the efficiency of gas drainage pumps, comprising: The performance evaluation regression coupling module is used to obtain historical state parameter data of gas extraction pumps under different operating conditions, analyze and construct the performance evaluation coupling relationship between the comprehensive efficiency of gas extraction pumps and state parameters; The theoretical optimal analysis module is used to determine the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating conditions by performing derivative analysis on the coupling relationship of the performance evaluation, and to calculate the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rates in historical data, which is denoted as the adjustment difference. The control range setting module is used to determine the control range of the liquid supply flow of the gas extraction pump to be controlled based on the theoretical optimal liquid supply flow and adjustment difference under the current operating conditions. The minimum value of the range is used as the starting data to set the initial adjustment step of the liquid supply flow. The control analysis and integration module adjusts the liquid supply flow rate based on the set adjustment step distance. If the adjustment of the liquid supply flow rate produces a positive benefit but does not reach the maximum value of the control range, the liquid supply flow rate is adjusted in the original direction with the current step distance until the adjusted liquid supply flow rate has no positive benefit or reaches the maximum value of the control range, then step S50 is executed. The optimal combination determination module is used to reduce the adjustment step distance by a preset ratio, calibrate the reduced step distance as the new adjustment step distance, determine whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop the control, and take the adjusted liquid supply flow rate that most recently generated positive benefits as the final control target.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention, based on a coupled correlation model among pump motor frequency, liquid supply flow rate, and pump efficiency level, can quickly locate the local fine-tuning range of pump motor frequency and liquid supply flow rate, avoiding blindly and excessively searching for the coarse-tuning range based solely on experience, which can cause drastic system fluctuations and affect pumping safety. Since there are numerical fitting errors between the mathematical model and the actual operating conditions, a local variable step-size optimization algorithm is further used to search for the maximum pumping efficiency level from the optimal matching relationship between pump motor frequency and liquid supply flow rate, overcoming the shortcomings of existing technologies that rely solely on pump motor frequency control. Furthermore, it updates the operating parameters of the matching pump in a timely manner when the gas pump is operating under varying conditions. This invention provides a scientific and reliable control method for significantly improving the efficiency of gas extraction systems, filling a gap in the field. It can update the operating parameters of the matching pump in a timely manner under various conditions such as the operation of the gas pump under different working conditions, and quickly obtain the optimal efficiency level under different working conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall method flow of the present invention; Figure 2 A curve showing the fitting relationship between liquid supply flow rate and overall efficiency; Figure 3 Color-mapped scatter plot of overall efficiency-liquid flow rate; Figure 4 A bar chart comparing the reference motor frequency with the actual motor frequency; Figure 5 This is a schematic diagram of the overall system structure of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0017] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0018] Example: Please see Figures 1-4 The present invention provides a technical solution: A rapid and precise control method for improving the efficiency of gas extraction pumps, comprising the following steps: S10: Obtain historical state parameter data of gas extraction pumps under different operating conditions, analyze and construct the performance evaluation coupling formula between the comprehensive efficiency of gas extraction pumps and state parameters.

[0019] The status parameters include the motor frequency, liquid supply flow rate, extraction volume, and power consumption of the gas extraction pump; the motor frequency is the average frequency within a set time period, and the liquid supply flow rate is the average liquid supply flow rate within a set time period. Historical data can be queried through the operator station or engineer station, and the required time period, parameters, and operating condition groups can be filtered according to the conditions, and the corresponding status parameters can be recorded.

[0020] The specific method for analyzing and constructing the performance evaluation coupling formula between the comprehensive efficiency of gas extraction pumps and state parameters is as follows: collect historical data of gas extraction pumps under various operating conditions, perform data denoising and outlier removal to ensure data quality, use multiple sets of historical data, and fit the regression coefficients with a regression algorithm. The fitting tool can be scientific computing software such as MATLAB and Python. Analyze the fitting residuals and test the goodness of fit of the model, such as R² and mean square error. Adjust the model structure or parameters according to the error to verify the physical rationality of the model and ensure that the parameter values ​​are within the acceptable range of actual and theoretical values. The trend of the relationship with the change of state parameters is consistent with the actual situation.

[0021] The performance evaluation coupling formula between the overall efficiency and state parameters of the gas extraction pump is as follows: ; In the formula, For the overall efficiency of gas extraction pumps This refers to the extraction rate of the gas extraction pump. The frequency of the gas extraction pump motor. The flow rate of the gas extraction pump. , c and ε are the empirical fitting coefficients, respectively. To reflect the proportionality between electrical power and liquid supply flow rate, The electrical power consumed by the gas extraction pump This is the exponential coefficient between the power and frequency of the gas extraction pump motor. This is the reference motor frequency for the gas extraction pump. The specific setting can be determined based on the model of the gas extraction pump and expert experience.

[0022] Where the empirical fitting coefficient , and c, and and All of these were obtained by fitting regression coefficients to multiple sets of historical data using regression algorithms.

[0023] This formula fully considers the factors affecting the performance characteristics of gas extraction pumps. Based on the coupling relationship model among the pump motor frequency, liquid supply flow rate, and pump efficiency level, and using the maximum efficiency ratio as the optimization condition, a coupled and coordinated control method for gas pumps based on the local variable step-pitch optimization algorithm is established. This method overcomes the defects of the existing technology that relies solely on the pump motor frequency control mode, and avoids the instability fluctuations of the extraction system caused by blind coarse adjustment, which would affect safe extraction. It is used to ensure that the gas extraction system always operates safely in the optimal efficiency state.

[0024] S20: By performing derivative analysis on the coupling relationship of the performance evaluation, the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating conditions is determined, and the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rates in the historical data is calculated and denoted as the adjustment difference.

[0025] The method for obtaining the theoretical optimal matching liquid supply flow rate in the historical data is as follows: Substitute the motor frequency of the gas extraction pump to be controlled under different operating conditions into the performance evaluation coupling formula, and perform derivative analysis of the entire performance evaluation coupling formula with respect to the liquid supply flow rate to determine the extreme point of the liquid supply flow rate corresponding to the maximum value of comprehensive efficiency under different operating conditions. The liquid supply flow rate corresponding to the extreme point is taken as the theoretical optimal matching liquid supply flow rate for the corresponding operating conditions. The optimal matching liquid supply flow rate in historical data is observed and recorded through experiments. The specific experimental method is as follows: Under the corresponding operating conditions, the motor frequency and liquid supply flow rate of the gas extraction pump are adjusted. The extraction volume and power consumption of the gas extraction pump within a set time period are monitored under different combinations of motor frequency and liquid supply flow rates. The efficiency of the gas extraction pump under different combinations is calculated using the efficiency empirical formula based on the measured extraction volume and power consumption. The liquid supply flow rate corresponding to the maximum gas extraction pump efficiency is taken as the actual optimal matching liquid supply flow rate for the corresponding operating conditions.

[0026] The formula used to calculate the adjustment difference is as follows: ; In the formula, To adjust for the differences, The actual optimal matching liquid supply flow rate under the i-th group of operating conditions. Let be the theoretically optimal matching liquid supply flow rate under the i-th operating condition group, where i is the index of the operating condition group. , This represents the total number of operating condition groups.

[0027] Using the maximum error instead of the average error ensures that all historically occurring maximum deviations are taken into account. The maximum error reflects the model's "applicability range" under all operating conditions, and the range covers the area where the theoretical and actual differences are greatest. This makes the control strategy applicable under all possible operating conditions, improving its versatility and preventing it from failing due to individual special operating conditions. If the average error or median error is used, the actual optimal point under some operating conditions may fall outside the control range, and the optimal point may not be found during control, resulting in suboptimal efficiency or control failure. The maximum error ensures that all historical maximum deviations are within the control range, reducing the risk of control failure.

[0028] S30: Based on the theoretical optimal liquid supply flow rate and adjustment difference of the gas extraction pump under the current operating conditions, determine the control range of the liquid supply flow rate of the gas extraction pump to be controlled, and set the initial adjustment step of the liquid supply flow rate with the minimum value of the range as the starting data.

[0029] The specific liquid supply flow rate control range is as follows: ,in, To determine the theoretically optimal liquid supply flow rate of the gas extraction pump under current operating conditions, the initial adjustment step of the liquid supply flow rate is calibrated as follows: .

[0030] S40: Adjust the liquid supply flow rate based on the set adjustment step distance. If the adjustment of the liquid supply flow rate produces a positive benefit but does not reach the maximum value of the control range, continue to adjust the liquid supply flow rate in the original direction with the current step distance until the adjusted liquid supply flow rate has no positive benefit or reaches the maximum value of the control range, then execute step S50.

[0031] S50: Reduce the adjustment step distance by a preset ratio, mark the reduced step distance as the new adjustment step distance, determine whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop the control, and take the adjusted liquid supply flow rate that generated the most recent positive benefit as the final control target.

[0032] The adjustment step distance is reduced by a preset ratio. The specific logic is as follows: the scaling condition is that the liquid supply flow rate after regulation has no positive benefit or reaches the maximum value of the regulation range. During the regulation process, each time the scaling condition is detected, the step distance corresponding to the current round of adjustment is scaled once until the scaled step distance is less than the specified minimum step distance. The specific formula used to scale the step size is as follows: ; In the formula, Adjust the scaled step size for the current round. For scaling ratio, Adjust the step size for the current round, where the scaling factor is... Greater than 0 and less than 1.

[0033] The specific logic for determining positive returns in step S40 is as follows: S41: Obtain the extraction volume before and after the gas extraction pump's liquid supply flow rate adjustment, and determine whether the extraction volume after the liquid supply flow rate adjustment has increased compared to before the adjustment. If it has not increased, it is determined that there is no positive benefit. If it has increased, proceed to step S42. S42: Adjust the operating frequency of the gas extraction pump, determine the operating frequency when the gas extraction volume of the gas extraction pump is the target extraction volume, obtain the shaft power of the gas extraction pump before and after the operating frequency adjustment, and determine whether the shaft power after the operating frequency adjustment is reduced compared with the original value. If it is reduced, it is determined that a positive benefit is generated and the operating frequency of the gas extraction pump after the adjustment is maintained; otherwise, it is determined that there is no positive benefit. The specific logic for regulating the liquid supply flow of the gas extraction pump to be regulated is as follows: keep the motor frequency of the gas extraction pump to be regulated at a fixed value under the current operating conditions, and monitor the changes in the extraction volume of the gas extraction pump to be regulated under different liquid supply flow inputs within the liquid supply flow regulation range through experiments. Specifically, this is achieved by adjusting the water supply valve to increase the initial adjustment step of the liquid supply flow rate. Adjust the liquid supply flow rate to [the specified value]. After a 30-minute delay, the extraction volume of the gas extraction pump to be controlled during the monitoring period is obtained to determine whether positive benefits are generated and to complete the first round of adjustment.

[0034] Specifically, this involves adjusting the water supply valve to increase the initial adjustment step of the liquid supply flow rate. Adjust the liquid supply flow rate to [the specified value]. After a 30-minute delay, the extraction volume of the gas extraction pump to be controlled during the monitoring period is obtained to detect whether positive benefits are generated. First, the liquid supply flow rate is determined to be... If the extraction volume is greater than the target extraction volume, and if so, the motor frequency is adjusted based on the motor frequency before this adjustment until the current extraction volume is reduced to the target extraction volume. The shaft power of the gas extraction pump at the current motor frequency is recorded, and it is determined whether the shaft power has decreased compared to before this adjustment. If it has decreased, it is determined that this adjustment has generated positive benefits, and the liquid supply flow rate is adjusted further with the current step size. Specifically, the adjustment is as follows: After a 30-minute delay, the extraction flow rate of the gas extraction pump to be controlled during the monitoring period is obtained, and the same judgment method is used to detect whether a positive benefit is generated. If a positive benefit is generated, the liquid supply flow rate is adjusted to... Continue to determine the generation of positive returns, and adjust in this way until no positive returns are generated.

[0035] When adjusting the motor frequency while keeping the liquid supply flow rate constant, the shaft power of the gas extraction pump can be calculated by measuring electrical parameters such as the motor's input voltage, current, and power factor, combined with the motor's efficiency characteristics. Alternatively, the shaft power can be calculated by directly measuring torque and speed using a torque sensor installed on the motor output shaft of the gas extraction pump. Specific calculation methods and formulas are conventional existing technology and will not be elaborated upon here.

[0036] If the fluid supply flow rate is changed from Adjust to If no positive benefit is detected, the step size corresponding to this round of adjustment is scaled. The scaled step size is then used to adjust the liquid supply flow rate after the previous round of adjustment, which meets the scaling conditions. Specifically, the initial adjustment step size of the liquid supply flow rate is adjusted. Scale the result to obtain the scaled step size. Use the scaled step size The fluid supply flow rate adjusted in the previous round to meet the scaling conditions Adjustments were made to the fluid supply flow rate. Determine whether a positive benefit is generated at this liquid supply flow rate. If a positive benefit is generated, continue to adjust the liquid supply flow rate based on the step size corresponding to this round of adjustment. Specifically, adjust the liquid supply flow rate to... Determine whether positive benefits are generated under this liquid supply flow rate, and adjust cyclically according to this method until the scaled step size is less than the specified minimum step size and no positive benefits are generated. Take the adjusted liquid supply flow rate and motor frequency that generated positive benefits most recently as the final control target.

[0037] If no positive benefit is generated after the first adjustment, the step size corresponding to this round of adjustment is scaled up. The scaled step size is used to adjust the liquid supply flow rate before this round of adjustment until the scaled step size is less than the specified minimum step size and no positive benefit is generated. The liquid supply flow rate and motor frequency after the most recent adjustment that generated a positive benefit are taken as the final control target.

[0038] Specifically, if adjusting the initial adjustment step of the liquid supply flow rate does not generate positive returns, the liquid supply flow rate should be adjusted to... Determine whether the scaling conditions are met, and then execute the above adjustment process sequentially.

[0039] Please see Figure 5 The present invention also provides a rapid and precise control system for improving the efficiency of a gas extraction pump. This system is used to execute the aforementioned rapid and precise control method for improving the efficiency of a gas extraction pump, comprising: The performance evaluation regression coupling module is used to obtain historical state parameter data of gas extraction pumps under different operating conditions, analyze and construct the performance evaluation coupling relationship between the comprehensive efficiency of gas extraction pumps and state parameters; The theoretical optimal analysis module is used to determine the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating conditions by performing derivative analysis on the coupling relationship of the performance evaluation, and to calculate the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rates in historical data, which is denoted as the adjustment difference. The control range setting module is used to determine the control range of the liquid supply flow of the gas extraction pump to be controlled based on the theoretical optimal liquid supply flow and adjustment difference under the current operating conditions. The minimum value of the range is used as the starting data to set the initial adjustment step of the liquid supply flow. The control analysis and integration module adjusts the liquid supply flow rate based on the set adjustment step distance. If the adjustment of the liquid supply flow rate produces a positive benefit but does not reach the maximum value of the control range, the liquid supply flow rate is adjusted in the original direction with the current step distance until the adjusted liquid supply flow rate has no positive benefit or reaches the maximum value of the control range, then step S50 is executed. The optimal combination determination module is used to reduce the adjustment step distance by a preset ratio, calibrate the reduced step distance as the new adjustment step distance, determine whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop the control, and take the adjusted liquid supply flow rate that most recently generated positive benefits as the final control target.

[0040] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0041] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented in software, the above embodiments can be implemented, in whole or in part, as a computer program product. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution.

[0042] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A rapid and precise control method for improving the efficiency of gas extraction pumps, characterized in that, The specific steps include: S10: Obtain historical state parameter data of gas extraction pumps under different operating conditions, analyze and construct the performance evaluation coupling formula between the comprehensive efficiency of gas extraction pumps and state parameters; S20: By performing derivative analysis on the coupling relationship of the performance evaluation, the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating conditions is determined, and the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rates in the historical data is calculated and denoted as the adjustment difference. S30: Based on the theoretical optimal liquid supply flow rate and adjustment difference of the gas extraction pump under the current operating conditions, determine the adjustment range of the liquid supply flow rate of the gas extraction pump to be adjusted, and set the initial adjustment step of the liquid supply flow rate with the minimum value of the range as the starting data. S40: Adjust the liquid supply flow rate based on the set adjustment step distance. If the adjustment of the liquid supply flow rate produces a positive benefit but does not reach the maximum value of the control range, continue to adjust the liquid supply flow rate in the original direction with the current step distance until the adjusted liquid supply flow rate has no positive benefit or reaches the maximum value of the control range, then proceed to step S50. S50: Reduce the adjustment step distance by a preset ratio, mark the reduced step distance as the new adjustment step distance, determine whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop the control, and take the adjusted liquid supply flow rate that generated the most recent positive benefit as the final control target.

2. The rapid and precise control method for improving the efficiency of a gas extraction pump according to claim 1, characterized in that: The status parameters include the motor frequency, liquid supply flow rate, extraction volume, and power consumption of the gas extraction pump. The performance evaluation coupling formula between the overall efficiency and state parameters of the gas extraction pump is as follows: ； In the formula, For the overall efficiency of gas extraction pumps. This refers to the extraction rate of the gas extraction pump. The frequency of the gas extraction pump motor. The flow rate of the gas extraction pump. , c and ε are the empirical fitting coefficients, respectively. To reflect the proportionality between electrical power and liquid supply flow rate, The electrical power consumed by the gas extraction pump This is the exponential coefficient between the power and frequency of the gas extraction pump motor. This is the reference motor frequency for the gas extraction pump.

3. The rapid and precise control method for improving the efficiency of a gas extraction pump according to claim 2, characterized in that: The method for obtaining the theoretical optimal matching liquid supply flow rate in the historical data is as follows: Substitute the motor frequency of the gas extraction pump to be controlled under different operating conditions into the performance evaluation coupling formula, and perform derivative analysis of the entire performance evaluation coupling formula with respect to the liquid supply flow rate to determine the extreme point of the liquid supply flow rate corresponding to the maximum value of comprehensive efficiency under different operating conditions. The liquid supply flow rate corresponding to the extreme point is taken as the theoretical optimal matching liquid supply flow rate for each operating condition. The actual optimal liquid supply flow rate in historical data was specifically observed and recorded through experiments; The formula used to calculate the adjustment difference is as follows: ； In the formula, To adjust for the differences, The actual optimal matching liquid supply flow rate under the i-th group of operating conditions. Let be the theoretically optimal matching liquid supply flow rate under the i-th operating condition group, where i is the index of the operating condition group. , This represents the total number of operating condition groups.

4. The rapid and precise control method for improving the efficiency of a gas extraction pump according to claim 1, characterized in that: The specific liquid supply flow rate control range is as follows: ,in, To determine the theoretically optimal liquid supply flow rate of the gas extraction pump under current operating conditions, the initial adjustment step of the liquid supply flow rate is calibrated as follows: .

5. The rapid and precise control method for improving the efficiency of a gas extraction pump according to claim 4, characterized in that: The adjustment step distance is reduced by a preset ratio. The specific logic is as follows: the scaling condition is that the liquid supply flow rate after regulation has no positive benefit or reaches the maximum value of the regulation range. During the regulation process, each time the scaling condition is detected, the step distance corresponding to the current round of adjustment is scaled once until the scaled step distance is less than the specified minimum step distance. The specific formula used to scale the step size is as follows: ； In the formula, Adjust the scaled step size for the current round. For scaling ratio, Adjust the step size for the current round, where the scaling factor is... Greater than 0 and less than 1.

6. The rapid and precise control method for improving the efficiency of a gas extraction pump according to claim 5, characterized in that: The specific logic for determining positive returns in step S40 is as follows: S41: Obtain the extraction volume before and after the gas extraction pump's liquid supply flow rate adjustment, and determine whether the extraction volume after the liquid supply flow rate adjustment has increased compared to before the adjustment. If it has not increased, it is determined that there is no positive benefit. If it has increased, proceed to step S42. S42: Adjust the operating frequency of the gas extraction pump, determine the operating frequency when the gas extraction volume of the gas extraction pump is the target extraction volume, obtain the shaft power of the gas extraction pump before and after the operating frequency adjustment, and determine whether the shaft power after the operating frequency adjustment is reduced compared with the original value. If it is reduced, it is determined that a positive benefit is generated and the operating frequency of the gas extraction pump after the adjustment is maintained; otherwise, it is determined that there is no positive benefit. The specific logic for regulating the liquid supply flow of the gas extraction pump to be regulated is as follows: keep the motor frequency of the gas extraction pump to be regulated at a fixed value under the current operating conditions, and monitor the changes in the extraction volume of the gas extraction pump to be regulated under different liquid supply flow inputs within the liquid supply flow regulation range through experiments. Specifically, this is achieved by adjusting the water supply valve to increase the initial adjustment step of the liquid supply flow rate. Adjust the liquid supply flow rate to [the specified value]. After a 30-minute delay, the extraction volume of the gas extraction pump to be controlled during the monitoring period is obtained to determine whether positive benefits are generated and to complete the first round of adjustment.

7. A rapid and precise control system for improving the efficiency of gas extraction pumps, characterized in that: The rapid and precise control system for improving the efficiency of gas extraction pumps is used to execute the rapid and precise control method for improving the efficiency of gas extraction pumps as described in any one of claims 1-6, comprising: The performance evaluation regression coupling module is used to obtain historical state parameter data of gas extraction pumps under different operating conditions, analyze and construct the performance evaluation coupling relationship between the comprehensive efficiency of gas extraction pumps and state parameters; The theoretical optimal analysis module is used to determine the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating conditions by performing derivative analysis on the coupling relationship of the performance evaluation, and to calculate the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rates in historical data, which is denoted as the adjustment difference. The control range setting module is used to determine the control range of the liquid supply flow of the gas extraction pump to be controlled based on the theoretical optimal liquid supply flow and adjustment difference under the current operating conditions. The minimum value of the range is used as the starting data to set the initial adjustment step of the liquid supply flow. The control analysis and integration module adjusts the liquid supply flow rate based on the set adjustment step distance. If the adjustment of the liquid supply flow rate produces a positive benefit but does not reach the maximum value of the control range, the liquid supply flow rate is adjusted in the original direction with the current step distance until the adjusted liquid supply flow rate has no positive benefit or reaches the maximum value of the control range, then step S50 is executed. The optimal combination determination module is used to reduce the adjustment step distance by a preset ratio, calibrate the reduced step distance as the new adjustment step distance, determine whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop the control, and take the adjusted liquid supply flow rate that most recently generated positive benefits as the final control target.

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