A rapid and fine regulation method and system for improving the efficiency level of gas extraction pump

Abstract

The application discloses a kind of fast fine regulation and control method and system for improving the efficiency level of gas extraction pump, and the application relates to the technical field of gas extraction.The present application comprises the following steps: analyzing and constructing the efficiency evaluation coupling relationship between the comprehensive efficiency of gas extraction pump and state parameters.Determine the theoretical optimal liquid supply flow under the current working condition, and calculate the maximum adjustment difference between the theoretical optimal and actual optimal liquid supply flow to determine the liquid supply flow control interval.Adjust the minimum value of the interval as the starting point, combined with the initial adjustment step of the set liquid supply flow, according to the following logic: if positive returns are generated after adjustment, continue adjustment based on the current step until the scaling condition is met, and then continue adjustment after scaling the step;If there is no positive return, scale the step and adjust to the minimum step, and finally use the parameter that produced positive returns last time as the control target.This method improves the accuracy and flexibility of gas extraction efficiency and energy consumption optimization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas extraction, in particular to a rapid and fine regulation method and system for improving the efficiency of gas extraction pumps. BACKGROUND

[0002] Gas extraction is a fundamental measure for preventing and controlling coal mine gas disasters, but not only the safety of extraction needs to be considered, but also the high efficiency and energy saving. According to incomplete statistics, the annual power consumption of coal mine gas extraction systems in China exceeds 10 billion degrees, but the efficiency level is very low, that is, the amount of gas extracted per unit of power consumption is low.

[0003] The gas extraction system mainly includes: a gas extraction pump, an inlet regulating valve, an extraction pipeline, a monitoring and control system, and its auxiliary facilities. The existing gas extraction regulation technology takes the pump motor frequency and the inlet valve opening as control variables to optimize the extraction working condition and save energy. The disclosure number CN115749689A discloses a gas extraction intelligent regulation method and device, which intelligently regulates the gas pipeline valve and the pump motor frequency through a model predictive control algorithm to optimize the safety and economy of the extraction system. The disclosure number CN117514799A discloses a self-adaptive control method for the running condition of a gas extraction pump, which adjusts the pump motor frequency to control the running condition based on the correlation between the extraction flow, negative pressure and pump motor frequency, and the extraction matching degree index. The disclosure number CN115749689A discloses a gas extraction pipeline network intelligent decision regulation method, which establishes an extraction system flow calculation model to optimize the safety and efficiency of the system with the valve opening as the control variable. From the above methods, the following problems can be analyzed: there are many performance influencing factors of the gas pump, and the regulation of the pump motor frequency alone cannot achieve the optimal running efficiency level of the pump.

[0004] The performance characteristics of the gas extraction pump directly affect the efficiency level of the extraction system, and the performance influencing factors include extraction negative pressure and flow, pump motor frequency, and liquid supply flow. The negative pressure and flow need to be set according to the site conditions and cannot be adjusted. Therefore, the scientific regulation of the pump motor frequency and the liquid supply flow is crucial, but the existing technology does not consider the coupling relationship between the two, and there is no corresponding theory and technology to guide the site operation, so the optimal efficiency level of the gas pump cannot be achieved.

[0005] The above information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, and therefore it can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] The purpose of the present application is to provide a rapid and fine regulation method and system for improving the efficiency of gas extraction pumps to solve the problems raised in the background technology.

[0007] To achieve the above object, the present application provides the following technical solutions:

[0008] A rapid and fine regulation method for improving the performance level of a gas extraction pump, comprising the following specific steps:

[0009] S10: Obtain historical state parameter data of the gas extraction pump under different operating conditions, analyze and construct a performance evaluation coupling relationship between the comprehensive efficiency of the gas extraction pump and the state parameters;

[0010] S20: Derive the theoretical optimal liquid supply flow rate of the gas extraction pump to be regulated under the current operating condition by performing derivative analysis on the performance evaluation coupling relationship, and calculate the maximum difference between the theoretical optimal and actual optimal matching liquid supply flow rate in the historical data, denoted as the adjustment difference;

[0011] S30: Determine the regulation interval of the liquid supply flow rate of the gas extraction pump to be regulated based on the theoretical optimal liquid supply flow rate of the gas extraction pump to be regulated under the current operating condition and the adjustment difference, and set the initial adjustment step distance of the liquid supply flow rate with the minimum value of the interval as the starting data;

[0012] S40: Adjust the liquid supply flow rate based on the set adjustment step distance, if a positive return is generated after adjusting the liquid supply flow rate and the maximum value of the regulation interval is not reached, continue to adjust the liquid supply flow rate in the original direction with the current step distance until the regulated liquid supply flow rate has no positive return or reaches the maximum value of the regulation interval, then execute step S50;

[0013] S50: Reduce the adjustment step distance by a preset proportion, and set the reduced step distance as a new adjustment step distance, judge whether the new adjustment step distance is less than the specified minimum step distance, if not, repeat step S40, if yes, stop regulation, and take the adjusted liquid supply flow rate that generates the positive return as the final regulation target.

[0014] Further, the state parameters include the motor frequency, liquid supply flow rate, extraction amount and consumed electric power of the gas extraction pump;

[0015] The performance evaluation coupling relationship between the comprehensive efficiency of the gas extraction pump and the state parameters is:

[0016] ;

[0017] In the formula, is the comprehensive efficiency of the gas extraction pump, is the extraction amount of the gas extraction pump, is the motor frequency of the gas extraction pump, is the liquid supply flow rate of the gas extraction pump, , and c are empirical fitting coefficients, respectively, a proportional coefficient between the electric power and the liquid supply flow rate, an electric power consumed by the gas extraction pump, an exponential coefficient of the motor power of the gas extraction pump and the motor frequency, a reference motor frequency of the gas extraction pump.

[0018] Further, the method for obtaining the theoretically optimal matching liquid supply flow rate in the historical data is: substituting the motor frequency of the gas extraction pump to be controlled under different operating conditions into the efficiency evaluation coupling relationship, and performing derivative analysis on the entire efficiency evaluation coupling relationship with respect to the liquid supply flow rate, to determine the extreme value point of the comprehensive efficiency maximum corresponding to the liquid supply flow rate under different operating conditions, and take the liquid supply flow rate corresponding to the extreme value point as the theoretically optimal matching liquid supply flow rate.

[0019] For the actually optimal matching liquid supply flow rate in the historical data, it is specifically observed and recorded through experiments; wherein the formula on which the adjustment difference calculation is based is:

[0020] ;

[0021] In the formula, is the adjustment difference, is the actually optimal matching liquid supply flow rate under the i th operating condition, is the theoretically optimal matching liquid supply flow rate under the i th operating condition, wherein i is the index of the operating condition group, , is the total number of the operating condition groups.

[0022] Further, the liquid supply flow rate control interval is specifically , wherein, is the theoretically optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating condition, and the initial adjustment step distance of the liquid supply flow rate is set as .

[0023] Further, the adjustment step distance is reduced by a preset proportion, and the specific logic is: taking no positive return of the controlled liquid supply flow rate or reaching the maximum value of the control interval as the scaling condition, and in the control process, every time the scaling condition is met, 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.

[0024] The formula on which the scaling of the step distance is specifically based is:

[0025] ;

[0026] In the formula, is the scaled step distance corresponding to the current round of adjustment, is the scaling ratio, Adjust the corresponding step length for the current round, wherein the scaling ratio is greater than 0 and less than 1.

[0027] Further, the judgment logic for generating positive benefits in step S40 is specifically:

[0028] S41: Obtain the extraction amount before and after the adjustment of the liquid supply flow of the gas extraction pump, judge whether the extraction amount after the adjustment of the liquid supply flow increases relative to before the adjustment, if not, judge that there is no positive benefit, if yes, execute step S42;

[0029] S42: Adjust the working frequency of the gas extraction pump, determine the working frequency of the gas extraction pump when the extraction amount is the target extraction amount, obtain the shaft power before and after the adjustment of the working frequency of the gas extraction pump, judge whether the shaft power after the adjustment of the working frequency decreases relative to before the adjustment, if yes, judge that positive benefits are generated, keep the working frequency of the gas extraction pump after the adjustment, otherwise, judge that there is no positive benefit;

[0030] The specific logic for regulating the liquid supply flow of the gas extraction pump to be regulated is: keep the motor frequency of the gas extraction pump to be regulated at a fixed value under the current working condition, and monitor the change of the extraction amount of the gas extraction pump to be regulated under different liquid supply flow inputs in the liquid supply flow regulation interval through experiments;

[0031] Specifically, the initial adjustment step length of the liquid supply flow is increased by adjusting the water supply valve The liquid supply flow is adjusted to , delayed for 30 minutes, the extraction amount of the gas extraction pump to be regulated in the monitoring period is obtained, and whether positive benefits are generated is judged, and the first round of adjustment is completed.

[0032] The present application also provides a kind of to improve the quick and fine regulation system of gas extraction pump efficiency level, the kind of to improve the quick and fine regulation system of gas extraction pump efficiency level is used to execute the above-mentioned one kind of to improve the quick and fine regulation method of gas extraction pump efficiency level, including:

[0033] Efficiency evaluation regression coupling module, for obtaining the historical state parameter data of gas extraction pump under different operating condition groups, analyzing and constructing the efficiency evaluation coupling relationship between the comprehensive efficiency of gas extraction pump and state parameters;

[0034] Theoretical optimal analysis module is used to determine the theoretical optimal liquid supply flow of the gas extraction pump to be regulated under the current operating condition by deriving the efficiency evaluation coupling relationship, and calculate the maximum difference between the theoretical optimal and actual optimal matching liquid supply flow in the historical data, which is recorded as adjustment difference;

[0035] The regulation range setting module is used for determining a regulation range of the liquid supply flow of the gas extraction pump to be regulated according to the theoretical optimal liquid supply flow of the gas extraction pump to be regulated under the current operating condition and the adjustment difference, and setting an initial adjustment step distance of the liquid supply flow with the minimum value of the range as the starting data;

[0036] The regulation analysis and integration module is used for adjusting the liquid supply flow based on the set adjustment step distance, and if a positive benefit is generated after the adjustment of the liquid supply flow and the maximum value of the regulation range is not reached, the liquid supply flow is continuously adjusted in the original direction with the current step distance until the adjusted liquid supply flow has no positive benefit or the maximum value of the regulation range is reached, and then step S50 is executed.

[0037] The optimal combination determination module is used for reducing the adjustment step distance by a preset proportion, labeling the reduced step distance as a new adjustment step distance, judging whether the new adjustment step distance is smaller than a specified minimum step distance, and if not, repeatedly executing step S40, and if yes, stopping the regulation and taking the adjusted liquid supply flow that generates the positive benefit as the final regulation target.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] According to the coupling correlation model among the pump motor frequency, the liquid supply flow and the pump efficiency level, the present application can quickly locate the local fine adjustment range of the pump motor frequency and the liquid supply flow, avoid completely relying on experience to blindly and excessively search for the coarse adjustment range, and cause the system to be violently fluctuated to affect the extraction safety. Due to the error in the numerical fitting degree between the mathematical model and the field condition, the local variable step distance optimization algorithm is further used to search for the maximum extraction efficiency level from the optimal matching relationship between the pump motor frequency and the liquid supply flow, and overcome the defects of the control mode of the prior art that relies on the pump motor frequency alone. In the variable working condition of the gas pump, the operating parameters of the matched pump are updated in time.

[0040] The present application provides a scientific and reliable regulation method for greatly improving the efficiency level of the gas extraction system, fills the blank in the field, and can update the operating parameters of the matched pump in time under the variable conditions such as the variable working condition of the gas pump, and quickly obtain the optimal efficiency level under different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 It is a whole method flowchart of the present application;

[0042] Figure 2 It is a liquid supply flow and comprehensive efficiency fitting curve diagram;

[0043] Figure 3 It is a comprehensive efficiency-liquid supply flow color mapping scatter plot;

[0044] Figure 4 It is a reference motor frequency and actual motor frequency comparison bar chart;

[0045] Figure 5 The whole system structure diagram of the present application. DETAILED DESCRIPTION

[0046] For the purpose, technical solutions and advantages of the present application to be more clearly and intelligibly, the present application is further described in detail below in connection with specific embodiments.

[0047] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present application should be the commonly understood meanings by those having ordinary skills in the art to which the present application belongs. The terms "first", "second" and similar words used in the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like only represent relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0048] Embodiment:

[0049] Please refer to Figures 1-4 The present application provides a technical solution:

[0050] A rapid and fine regulation method for improving the efficiency level of gas extraction pump, the specific steps comprising:

[0051] S10: Obtain the historical state parameter data of the gas extraction pump under different operating condition groups, analyze and construct the efficiency evaluation coupling relationship between the comprehensive efficiency of the gas extraction pump and the state parameters.

[0052] The state parameters include the motor frequency, liquid supply flow, extraction amount and consumed electric power of the gas extraction pump; the motor frequency is the average frequency in a set time period, and the liquid supply flow is the average liquid supply flow in a set time period. The historical data can be queried through the operator station or the engineer station, the required time period, parameters and operating condition groups can be selected according to conditions, and the corresponding state parameters are recorded.

[0053] The specific method of analyzing and constructing the efficiency evaluation coupling relationship between the comprehensive efficiency and the state parameters of the gas extraction pump is as follows: collecting historical data of the gas extraction pump under each working condition, performing data denoising and outlier rejection to ensure data quality, using multiple sets of historical data to fit the regression coefficients by using a regression algorithm, using scientific calculation software such as MATLAB and Python as the fitting tool, analyzing the fitting residual, testing the fitting goodness of the model such as R² and mean square error, adjusting the model structure or parameters according to the error, verifying the physical reasonableness of the model, ensuring that the parameter values are in the actual and theoretical acceptable interval, and ensuring that the trend of the relationship with the change of the state parameters is consistent with the actual situation.

[0054] The efficiency evaluation coupling relationship between the comprehensive efficiency and the state parameters of the gas extraction pump is as follows:

[0055] ;

[0056] In the formula, is the comprehensive efficiency of the gas extraction pump, is the extraction amount of the gas extraction pump, is the motor frequency of the gas extraction pump, is the liquid supply flow of the gas extraction pump, , and c are empirical fitting coefficients, is a proportional coefficient reflecting the relationship between the electric power and the liquid supply flow, is the electric power consumed by the gas extraction pump, is an exponential coefficient of the motor power and the motor frequency of the gas extraction pump, is the reference motor frequency of the gas extraction pump, which can be set according to the model of the gas extraction pump combined with expert experience.

[0057] The empirical fitting coefficients , and c are obtained by fitting the regression coefficients by using a regression algorithm with multiple sets of historical data. and are obtained by fitting the regression coefficients by using a regression algorithm with multiple sets of historical data.

[0058] The formula fully considers the influencing factors of the performance characteristics of the gas extraction pump, establishes a “motor frequency-liquid supply flow” coupling and coordinated control method for the gas pump based on the coupling correlation model among the motor frequency, the liquid supply flow and the pump efficiency level, and the maximum efficiency ratio as the optimization condition, and the local variable step size optimization algorithm, overcomes the defects of the control mode of the existing technology which depends on the pump motor frequency alone, and avoids the instability fluctuation of the extraction system caused by blind coarse adjustment, which affects the safe extraction, and is used to realize that the gas extraction system always runs in the optimal efficiency state.

[0059] S20: The theoretical optimal liquid supply flow of the to-be-controlled gas extraction pump under the current operating condition is determined by derivative analysis of the performance evaluation coupling relationship, and the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow in the historical data is calculated, which is recorded as the adjustment difference.

[0060] The method for obtaining the theoretical optimal matching liquid supply flow in the historical data is: the motor frequency of the to-be-controlled gas extraction pump under different operating conditions is substituted into the performance evaluation coupling relationship, and the derivative analysis of the entire performance evaluation coupling relationship with respect to the liquid supply flow is performed to determine the extreme value point of the comprehensive efficiency maximum value under different operating conditions, and the liquid supply flow corresponding to the extreme value point is taken as the theoretical optimal matching liquid supply flow corresponding to the operating condition;

[0061] For the actual optimal matching liquid supply flow in the historical data, the specific experimental method is: under the corresponding operating condition, the motor frequency and the liquid supply flow of the gas extraction pump are adjusted, the extraction amount and the consumed electric power of the gas extraction pump under different combinations of the motor frequency and the liquid supply flow of the gas extraction pump in a set time period are monitored, and the gas extraction pump efficiency under different combinations is calculated through the measured extraction amount and consumed electric power through the efficiency empirical formula, and the liquid supply flow corresponding to the maximum gas extraction pump efficiency is taken as the actual optimal matching liquid supply flow corresponding to the operating condition.

[0062] The formula for calculating the adjustment difference is:

[0063] ;

[0064] In the formula, is the adjustment difference, is the actual optimal matching liquid supply flow under the i-th operating condition, is the theoretical optimal matching liquid supply flow under the i-th operating condition, where i is the index of the operating condition group, , is the total number of operating condition groups.

[0065] Where, the maximum error instead of the average error is used to ensure that all historical maximum deviations are considered, the maximum error reflects the "applicable range" of the model under all conditions, and the interval covers the range when the theoretical and actual differences are maximum, so that the control strategy is applicable under all possible conditions, improving the universality and not failing due to individual special conditions. If the average error or the median error is used, the actual optimal point under some conditions may fall outside the control interval, 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 interval, reducing the risk of control failure.

[0066] S30: determining a control interval of the liquid supply flow of the to-be-controlled gas extraction pump according to the theoretical optimal liquid supply flow of the to-be-controlled gas extraction pump under the current operating condition and the adjustment difference, taking the minimum value of the interval as the initial data, and setting an initial adjustment step distance of the liquid supply flow.

[0067] The control interval of the liquid supply flow is specifically , wherein is the theoretical optimal liquid supply flow of the to-be-controlled gas extraction pump under the current operating condition, and the initial adjustment step distance of the liquid supply flow is set as .

[0068] S40: adjusting the liquid supply flow based on the set adjustment step distance, if a positive benefit is generated after adjusting the liquid supply flow and the maximum value of the control interval is not reached, continuing to adjust the liquid supply flow in the original direction at the current step distance until the adjusted liquid supply flow has no positive benefit or the maximum value of the control interval is reached, and then performing step S50.

[0069] S50: reducing the adjustment step distance by a preset proportion, setting the reduced step distance as a new adjustment step distance, judging whether the new adjustment step distance is less than a specified minimum step distance, if not, repeatedly performing step S40, and if yes, stopping the control and taking the adjusted liquid supply flow that generates the positive benefit as the final control target.

[0070] The adjustment step distance is reduced by a preset proportion, and the specific logic is that the adjusted liquid supply flow that has no positive benefit or reaches the maximum value of the control interval is taken as a scaling condition, and in the control process, the step distance corresponding to the current round of adjustment is scaled once every time the scaling condition is met until the scaled step distance is less than the specified minimum step distance.

[0071] The specific formula for scaling the step distance is

[0072] ;

[0073] In the formula, is the scaled step distance corresponding to the current round of adjustment, is the scaling ratio, is the step distance corresponding to the current round of adjustment, wherein the scaling ratio is greater than 0 and less than 1.

[0074] The judgment logic for generating a positive benefit in step S40 is specifically:

[0075] S41: obtaining the extraction amount before and after adjusting the liquid supply flow of the gas extraction pump, judging whether the extraction amount after adjusting the liquid supply flow is increased relative to the extraction amount before adjusting, if not, judging that there is no positive benefit, and if yes, performing step S42.

[0076] S42: adjusting the working frequency of the gas extraction pump, determining the working frequency of the gas extraction pump when the extraction amount of the gas extraction pump is the target extraction amount, obtaining the shaft power before and after the adjustment of the working frequency of the gas extraction pump, judging whether the shaft power after the adjustment of the working frequency is reduced relative to the shaft power before the adjustment, if the shaft power is reduced, judging that positive feedback is generated, keeping the adjusted working frequency of the gas extraction pump, otherwise judging that no positive feedback is generated;

[0077] The specific logic for regulating the liquid supply flow of the gas extraction pump to be regulated is as follows: keeping the motor frequency of the gas extraction pump to be regulated as a fixed value under the current working condition, and monitoring the change of the extraction amount of the gas extraction pump to be regulated under different liquid supply flow inputs in the liquid supply flow regulation range through experiments;

[0078] The specific adjustment step distance of the initial liquid supply flow is adjusted by adjusting the water supply valve The liquid supply flow is adjusted to , and the extraction amount of the gas extraction pump to be regulated in the monitoring time period is obtained after a delay of 30 minutes, and it is judged whether positive feedback is generated, and the first round of adjustment is completed.

[0079] The specific adjustment step distance of the initial liquid supply flow is adjusted by adjusting the water supply valve The liquid supply flow is adjusted to , and the extraction amount of the gas extraction pump to be regulated in the monitoring time period is obtained after a delay of 30 minutes, and it is judged whether positive feedback is generated, and the first round of adjustment is completed. The specific adjustment step distance of the initial liquid supply flow is adjusted by adjusting the water supply valve The liquid supply flow is adjusted to , and the extraction amount of the gas extraction pump to be regulated in the monitoring time period is obtained after a delay of 30 minutes, and it is judged whether positive feedback is generated, and the first round of adjustment is completed.

[0080] When the motor frequency is adjusted, the liquid supply flow remains unchanged, the shaft power of the gas extraction pump can be calculated by measuring the input voltage, current and power factor of the motor, combined with the efficiency characteristics of the motor, or by directly measuring the torque and speed through the torque sensor installed on the motor output shaft of the gas extraction pump, thereby calculating the shaft power. The specific calculation method and formula are conventional prior art and will not be described here.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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:

[0085] 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;

[0086] 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.

[0087] The regulation interval setting module is configured to determine a regulation interval of the liquid supply flow of the gas extraction pump to be regulated based on the theoretical optimal liquid supply flow of the gas extraction pump to be regulated under the current operating condition and the adjustment difference, and set an initial adjustment step distance of the liquid supply flow with the minimum value of the interval as the starting data;

[0088] The regulation analysis and integration module is configured to adjust the liquid supply flow based on the set adjustment step distance, continue to adjust the liquid supply flow in the original direction with the current step distance if a positive benefit is generated after the adjustment of the liquid supply flow and the maximum value of the regulation interval is not reached, and execute step S50 after the liquid supply flow after the regulation has no positive benefit or reaches the maximum value of the regulation interval.

[0089] The optimal combination determination module is configured to reduce the adjustment step distance by a preset ratio, calibrate the reduced step distance as a new adjustment step distance, and determine whether the new adjustment step distance is less than a specified minimum step distance, and if not, repeat step S40, and if yes, stop the regulation and take the liquid supply flow after the regulation that generates the positive benefit as the final regulation target.

[0090] The above formulas are all dimensionless values, and the formulas are obtained by collecting a large amount of data to simulate a formula of the nearest real situation, and the preset parameters in the formula are set by a person skilled in the art according to the actual situation.

[0091] The above embodiments can be realized wholly or partially by software, hardware, firmware or any combination thereof. When realized by software, the above embodiments can be realized in the form of a computer program product wholly or partially. Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized by hardware or software methods depends on the specific application and design constraints of the technical solutions.

[0092] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, and can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0093] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application.

Claims

1. A rapid fine regulation method for improving the performance level of a gas extraction pump, characterized in that, The specific steps include: S10: Obtain historical state parameter data of the gas extraction pump under different operating condition groups, analyze and construct an efficiency evaluation coupling relationship between the comprehensive efficiency of the gas extraction pump and the state parameters; S20: Derive the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating condition by analyzing the efficiency evaluation coupling relationship, and calculate the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow rate in the historical data, denoted as the adjustment difference; S30: Determine the control interval of the liquid supply flow rate of the gas extraction pump to be controlled based on the theoretical optimal liquid supply flow rate of the gas extraction pump to be controlled under the current operating condition and the adjustment difference, and set the initial adjustment step distance of the liquid supply flow rate with the minimum value of the interval as the starting data; S40: Adjust the liquid supply flow rate based on the set adjustment step distance, if the positive yield is generated after adjusting the liquid supply flow rate and the maximum value of the control interval is not reached, 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 yield or reaches the maximum value of the control interval, and then execute step S50; S50: Reduce the adjustment step distance by a preset proportion, mark the reduced step distance as a new adjustment step distance, and judge 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 generates the positive yield as the final control target; The state parameters include the motor frequency, liquid supply flow rate, extraction amount and consumed electric power of the gas extraction pump; The efficiency evaluation coupling relationship between the comprehensive efficiency of the gas extraction pump and the state parameters is: wherein, is the comprehensive efficiency of the gas extraction pump, is the extraction volume of the gas extraction pump, is the motor frequency of the gas extraction pump, is the liquid supply flow of the gas extraction pump, , and c are empirical fitting coefficients, is a proportional coefficient reflecting the relationship between the electric power and the liquid supply flow, is the electric power consumed by the gas extraction pump, is an exponential coefficient of the motor power and the motor frequency of the gas extraction pump, is the reference motor frequency of the gas extraction pump; The method for obtaining the theoretical optimal matching liquid supply flow rate in the historical data is: substituting the motor frequency of the gas extraction pump to be controlled under different operating conditions into the efficiency evaluation coupling relationship, and performing derivative analysis on the entire efficiency evaluation coupling relationship with respect to the liquid supply flow rate, to determine the extreme value point of the liquid supply flow rate corresponding to the maximum comprehensive efficiency under different operating conditions, and take the liquid supply flow rate corresponding to the extreme value point as the theoretical optimal matching liquid supply flow rate corresponding to each operating condition; The actual optimal matching liquid supply flow rate in the historical data is specifically observed and recorded by experiment; wherein the formula for calculating the adjustment difference is: In the formula, to adjust the difference, is the actual optimal matching liquid supply flow under the i th group of operating conditions, is the theoretical optimal matching liquid supply flow under the i th group of operating conditions, wherein i is the index of the group of operating conditions, , is the total number of groups of operating conditions; The liquid supply flow regulation interval is specifically , wherein is the theoretical optimal liquid supply flow of the gas extraction pump to be regulated under the current operating condition, and the initial adjustment step of the liquid supply flow is calibrated as .

2. The method of claim 1, wherein the method is characterized by: The adjustment step distance is reduced by a preset proportion, and the specific logic is: taking the adjusted liquid supply flow rate without positive yield or reaching the maximum value of the control interval as the scaling condition, and scaling the step distance corresponding to the current round once every time the scaling condition is met in the control process, until the scaled step distance is less than the specified minimum step distance; The specific formula for scaling the step distance is: In the formula, is the corresponding scaled step distance of the current round adjustment, is the scaling ratio, is the corresponding step distance of the current round adjustment, wherein the scaling ratio is greater than 0 and less than 1.

3. The method of claim 2, wherein the method is characterized by: The judgment logic for generating positive yield in step S40 is specifically: S41: Obtain the extraction amount before and after adjusting the liquid supply flow rate of the gas extraction pump, judge whether the extraction amount after adjusting the liquid supply flow rate increases relative to that before adjusting, if not, judge that there is no positive yield, if yes, execute step S42; S42: adjusting the working frequency of the gas extraction pump, determining the working frequency of the gas extraction pump when the extraction amount of the gas extraction pump is the target extraction amount, obtaining the shaft power before and after the working frequency adjustment of the gas extraction pump, and determining whether the shaft power after the working frequency adjustment is reduced relative to the shaft power before the working frequency adjustment, if the shaft power after the working frequency adjustment is reduced, it is determined that positive benefits are generated, the working frequency of the adjusted gas extraction pump is maintained, otherwise, it is determined that there are no positive benefits; The specific logic for regulating the liquid supply flow of the to-be-regulated gas extraction pump is: keeping the motor frequency of the to-be-regulated gas extraction pump as a fixed value under the current working condition, and monitoring the change of the extraction amount of the to-be-regulated gas extraction pump under different liquid supply flow inputs in the liquid supply flow regulation interval through experiments; Specifically, by adjusting the water supply valve, the initial adjustment step of increasing the liquid supply flow is increased The liquid supply flow is adjusted to , delay 30 min, get the extraction amount of the gas extraction pump to be controlled in the monitoring period, judge whether positive benefit is generated, and complete the first round of adjustment.

4. A rapid fine regulation system for improving the performance level of a gas extraction pump, characterized in that it comprises: The rapid and fine regulation system for improving the efficiency level of the gas extraction pump is used to execute the rapid and fine regulation method for improving the efficiency level of the gas extraction pump according to any one of claims 1-3, comprising: An efficiency evaluation regression coupling module is configured to obtain historical state parameter data of the gas extraction pump under different operating condition groups, analyze and construct an efficiency evaluation coupling relationship between the comprehensive efficiency of the gas extraction pump and the state parameters; A theoretical optimal analysis module is configured to determine the theoretical optimal liquid supply flow of the to-be-regulated gas extraction pump under the current operating condition by deriving the efficiency evaluation coupling relationship, and calculate the maximum difference between the theoretical optimal and the actual optimal matching liquid supply flow in the historical data, which is recorded as the adjustment difference; A regulation interval setting module is configured to determine the regulation interval of the liquid supply flow of the to-be-regulated gas extraction pump according to the theoretical optimal liquid supply flow of the to-be-regulated gas extraction pump under the current operating condition and the adjustment difference, and set the initial adjustment step distance of the liquid supply flow with the minimum value in the interval as the starting data; A regulation analysis integration module is configured to adjust the liquid supply flow based on the set adjustment step distance, if positive benefits are generated after adjusting the liquid supply flow and the maximum value of the regulation interval is not reached, continue to adjust the liquid supply flow in the original direction with the current step distance until the regulated liquid supply flow has no positive benefits or reaches the maximum value of the regulation interval, and then execute step S50; An optimal combination determination module is configured to reduce the adjustment step distance by a preset proportion, mark the reduced step distance as a new adjustment step distance, determine whether the new adjustment step distance is less than a specified minimum step distance, if not, repeat step S40, if yes, stop the regulation, and take the adjusted liquid supply flow that generates positive benefits as the final regulation target.

Images