Method for automatically controlling electric feed pump

Abstract

The invention provides an electric feed pump automatic control method, and relates to the technical field of feed pump control, and the method comprises the steps: monitoring and analyzing the operation state of an electric feed pump in real time, obtaining target operation data, carrying out the operation condition estimation of the current electric feed pump, and obtaining a condition estimation result; generating a target adjustment strategy based on the analysis of the working condition estimation result; and the execution mechanism responds to the target adjustment strategy. The operating state of the electric feed pump is monitored in real time, and the operating condition of the current electric feed pump is estimated to obtain a condition estimation result; analyzing the obtained working condition estimation result to generate a target adjustment strategy; the executing mechanism responds to the target adjusting strategy, the efficiency of the electric feed pump is effectively improved, and great significance is achieved for reducing the power consumption rate of a whole plant.

Description

Technical Field

[0001] The invention relates to the technical field of water supply pump control, and in particular to a method for automatic control of an electric water supply pump. Background Art

[0002] With the continuous advancement of industrial automation technology, water pumps have become an indispensable equipment in industrial production. As a type of water pump, the development of automatic control methods for electric water pumps is an important part of the field of industrial automation.

[0003] As an important auxiliary machine of the unit, the electric feedwater pump unit consumes about 25% of the unit's electricity. The traditional electric feedwater pump automatic control method often has the problem of high energy consumption during operation, which not only increases the company's operating costs, but also aggravates the consumption of energy resources. Therefore, how to improve the efficiency of the electric feedwater pump and achieve energy-saving transformation has become one of the current research focuses.

[0004] Therefore, the present invention provides a method for automatically controlling an electric water supply pump. Summary of the invention

[0005] The present invention provides a method for automatic control of an electric water supply pump, which is used to obtain an estimated operating condition result by real-time monitoring of the operating status of the electric water supply pump and estimating the current operating condition of the electric water supply pump; analyzing the obtained estimated operating condition result to generate a target adjustment strategy; an actuator responds to the target adjustment strategy, which effectively improves the efficiency of the electric water supply pump and is of great significance to reducing the power consumption rate of the entire plant.

[0006] An embodiment of the present invention provides a method for automatically controlling an electric water supply pump, comprising:

[0007] Step 1: Monitor and analyze the operating status of the electric water supply pump in real time, obtain target operating data, estimate the operating condition of the current electric water supply pump, and obtain the operating condition estimation result;

[0008] Step 2: generating a target adjustment strategy based on the analysis of the predicted results of the working condition;

[0009] Step 3: The actuator responds to the target regulation strategy.

[0010] Preferably, the operating state of the electric water supply pump is monitored and analyzed in real time, and the target operating data is obtained to evaluate the current operating state of the electric water supply pump to obtain the operating state evaluation result, including:

[0011] Using a set monitoring tool installed at a preset position to monitor the operating state of the electric water supply pump in real time to obtain first operating parameter data;

[0012] Filtering data associated with the energy-saving target of the water supply pump from the first operating parameter data to perform data preprocessing to obtain target operating data;

[0013] A deviation analysis is performed on the target operating data and the corresponding set operating values, and the operating condition of the current electric water supply pump is estimated based on the deviation analysis result to obtain an operating condition estimation result.

[0014] Preferably, the target operating data includes the speed, pressure, flow rate of the water supply pump and the motor shaft speed and output speed of the hydraulic coupling.

[0015] Preferably, a deviation analysis is performed on the target operating data and the corresponding set operating value, and an operating condition estimation result is obtained for the current electric water supply pump according to the deviation analysis result, including:

[0016] Extract the parameter-setting operation mapping table of the current electric feedwater pump from the feedwater pump database;

[0017] Select a set operation value from the parameter-set operation mapping table and subtract the corresponding target operation data to perform a subtraction operation to obtain a first target deviation value;

[0018] Based on the first target deviation value, the operating state evaluation coefficient of the electric water supply pump is calculated, the state evaluation level of the current electric water supply pump is determined, and the result is output as the operating condition prediction result;

[0019] The expected operating data of the electric water supply pump is calculated based on the first target deviation value by using the set control strategy and output as the operating condition prediction result.

[0020] Preferably, based on the first target deviation value, the operating state evaluation coefficient of the electric water supply pump is calculated, the state evaluation level of the current electric water supply pump is determined, and output as the operating condition prediction result, including:

[0021] Based on the first target deviation value, calculating the operating state evaluation coefficient of the current electric water supply pump;

[0022] Compare and analyze the operating status evaluation coefficient with the set evaluation threshold range. When the operating status evaluation coefficient belongs to the set evaluation threshold range, determine that the current state evaluation level of the electric water supply pump is level one, and output it as the working condition prediction result;

[0023] When the operating state evaluation coefficient is less than the set evaluation threshold lower limit, the current state evaluation level of the electric water supply pump is determined to be level 2 and is output as the operating condition prediction result;

[0024] When the operating state evaluation coefficient is greater than the set upper limit of the evaluation threshold, the current state evaluation level of the electric water supply pump is determined to be level three and is output as the operating condition prediction result;

[0025] The calculation formula of the operating status evaluation coefficient is as follows:

[0026] Wherein, B represents the operating status evaluation coefficient of the current electric water supply pump; n represents the total number of target operating data whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; x i It is represented by the first target deviation value corresponding to the i-th target operation data of the current electric water supply pump whose first target deviation value from the set operation value is greater than the set deviation threshold upper limit, where i=1, 2, 3, ..., n; x i0 ; It is represented as the average value of the first target deviation values ​​of all target operating data of the current electric water supply pump whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; It is represented by the evaluation weight value of the operating state of the electric water supply pump for the numerical deviation degree of the i-th target operating data whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; m is represented by the total number of target operating data whose first target deviation value from the set operating value is less than the set deviation threshold lower limit; y j It is represented by the first target deviation value corresponding to the jth target operation data of the current electric water supply pump whose first target deviation value from the set operation value is less than the lower limit of the set deviation threshold, where j=1, 2, 3, ..., m; It is represented as the average value of the first target deviation values ​​of all target operating data in the current electric water supply pump whose first target deviation value from the set operating value is less than the lower limit of the set deviation threshold; ω j It is expressed as the evaluation weight value of the operating state of the electric water supply pump, which is expressed as the degree of numerical deviation of the jth target operating data whose first target deviation value from the set operating value is less than the set deviation threshold lower limit.

[0027] Preferably, based on the analysis of the operating condition prediction results, a target adjustment strategy is generated, including:

[0028] Extracting an operation-adjustment strategy table matching the current state assessment level of the electric feedwater pump from a feedwater pump regulation database;

[0029] If a single first parameter adjustment strategy is extracted from the operation-adjustment strategy table according to the current expected operation data, the current first parameter adjustment strategy is regarded as the selected adjustment strategy;

[0030] If multiple first parameter adjustment strategies are extracted from the operation-adjustment strategy table according to the current expected operation data, all the first parameter adjustment strategies currently extracted are marked as screening strategies;

[0031] Extract the corresponding historical adjustment effect evaluation coefficients of the operation parameter adjustment using the screening strategy within a preset time period and calculate the average to obtain the strategy evaluation coefficient;

[0032] The screening strategy with the largest strategy evaluation coefficient is regarded as the selected adjustment strategy;

[0033] When there are strategy-associated parameters in the selected regulation strategy, the strategy-associated parameters are adjusted based on the load change of the electric water supply pump and the demand for adjustment of the operating parameters, and a target regulation strategy is generated and output.

[0034] Preferably, the strategy-related parameters in the selected regulation strategy are adjusted based on the load change of the current electric water supply pump, and a target regulation strategy is generated and output, including:

[0035] Acquire and establish a water supply pump-load curve diagram based on the load data of the electric water supply pump within a preset time period;

[0036] Extracting the trend characteristics of the water supply pump-load curve diagram and performing weighted averaging to calculate the load variation coefficient;

[0037] Combine the load variation coefficient with the expected operation data for analysis, calculate the adjustment coefficient, adjust the key strategy parameters, and obtain the adjusted parameter values;

[0038] The calculation formula of the adjustment coefficient is as follows:

[0039] Where P is the adjustment coefficient; γ is the correlation factor between the key parameter of the current strategy and the operating parameter adjusted by the selected adjustment strategy; c1 is the expected operating data of the operating parameter adjusted by the selected adjustment strategy of the key parameter of the current strategy; c0 is the target operating data of the operating parameter adjusted by the selected adjustment strategy of the key parameter of the current strategy; ∈ k It is represented as the corresponding load variation coefficient of the kth load, and its value range is (0, 1), where k = 1, 2, ..., o; o is the total number of load categories, and the loads are flow load, pressure load and power load respectively; θ k It represents the dependency coefficient between the operating parameters adjusted by the selected adjustment strategy of the key parameters of the current strategy and the k-th type of load, and the value range is (0, 1); ln represents the natural logarithm; e represents the base of the natural logarithm;

[0040] After adjusting the policy-associated parameters in the selected adjustment policy to corresponding adjusted parameter values, the parameters are output as the target adjustment policy.

[0041] Preferably, the actuator responds to the target adjustment strategy, including:

[0042] Generate a target adjustment instruction according to the target adjustment strategy and transmit it to the execution mechanism;

[0043] The actuator adjusts the operating parameters of the current electric water supply pump according to the received target adjustment instruction;

[0044] Use the set monitoring tool to detect the operating status of the current electric water supply pump after parameter adjustment, and obtain the adjusted operating data;

[0045] Performing deviation analysis on the adjusted operating data and the expected operating data to obtain an adjusted deviation value;

[0046] If there is an adjustment deviation value that exceeds the set adjustment deviation range, the target adjustment strategy is re-determined and the corresponding target adjustment instruction is generated and output to the actuator to re-adjust the operating parameters until the current operating state of the electric water supply pump after adjustment reaches the preset target state.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] The operating status of the electric water feed pump is monitored in real time and the operating condition prediction results are obtained by predicting the current operating condition of the electric water feed pump; the obtained operating condition prediction results are analyzed to generate a target adjustment strategy; the actuator responds to the target adjustment strategy, which effectively improves the efficiency of the electric water feed pump and is of great significance to reducing the power consumption rate of the entire plant.

[0049] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0050] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 The present invention is a flowchart of a method for automatically controlling an electric water supply pump in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0054] The embodiment of the present invention provides a method for automatically controlling an electric water supply pump, such as Figure 1 As shown, including:

[0055] Step 1: Monitor and analyze the operating status of the electric water supply pump in real time, obtain target operating data, estimate the operating condition of the current electric water supply pump, and obtain the operating condition estimation result;

[0056] Step 2: generating a target adjustment strategy based on the analysis of the predicted results of the working condition;

[0057] Step 3: The actuator responds to the target regulation strategy.

[0058] In this embodiment, the electric water pump is a pump device that uses an electric motor to drive a turbine, generates centrifugal force to lift water or other liquids to a certain height and transmits them to a specified location; the target operation data refers to the corresponding parameter data of the current electric water pump's energy-saving target extracted from the first operation parameter data based on the set energy-saving association table, and the data is obtained after data preprocessing, including the speed, pressure, flow of the water pump and the motor shaft speed and output speed of the hydraulic coupling.

[0059] In this embodiment, the operating condition prediction result refers to the state evaluation level and expected operating data of the electric water supply pump, wherein the state evaluation level includes three levels: level one, level two and level three; the target adjustment strategy is used to improve the efficiency of the current electric water supply pump; the actuator refers to a device that adjusts the operating parameters of the electric water supply pump in response to the target adjustment strategy, improves the efficiency of the water supply pump, and thereby achieves energy-saving transformation of the water supply pump, such as a hydraulic coupling or an electric actuator.

[0060] The beneficial effects of the above technical solution are: by real-time monitoring of the operating status of the electric water supply pump and estimating the current operating condition of the electric water supply pump to obtain the operating condition prediction result; analyzing the obtained operating condition prediction result to generate a target adjustment strategy; the actuator responds to the target adjustment strategy, which effectively improves the efficiency of the electric water supply pump and is of great significance to reducing the power consumption rate of the entire plant.

[0061] The embodiment of the present invention provides a method for automatic control of an electric water supply pump, which monitors and analyzes the operating state of the electric water supply pump in real time, obtains target operating data, evaluates the current operating state of the electric water supply pump, and obtains operating state evaluation results, including:

[0062] Using a set monitoring tool installed at a preset position to monitor the operating state of the electric water supply pump in real time to obtain first operating parameter data;

[0063] Filtering data associated with the energy-saving target of the water supply pump from the first operating parameter data to perform data preprocessing to obtain target operating data;

[0064] A deviation analysis is performed on the target operating data and the corresponding set operating values, and the operating condition of the current electric water supply pump is estimated based on the deviation analysis result to obtain an operating condition estimation result.

[0065] In this embodiment, the preset position is predetermined; the set monitoring tool refers to various sensors used to collect operating status data of the electric water supply pump, such as a pressure sensor; the first operating parameter data is data collected using a set monitoring tool installed at a preset position of the electric water supply pump, including power consumption, temperature, pressure, speed, flow rate, etc.

[0066] In this embodiment, the energy-saving target of the water supply pump refers to the energy-saving target of the current electric water supply pump, including reducing the loss of the hydraulic coupling and improving the efficiency of the water supply pump; the target operation data refers to the corresponding parameter data of the energy-saving target of the current electric water supply pump extracted from the first operation parameter data based on the set energy-saving association table, and the data is obtained after data preprocessing, including the speed, pressure, flow rate of the water supply pump and the motor shaft speed and output speed of the hydraulic coupling; the set energy-saving association table is composed of the energy-saving target of the water supply pump and the corresponding parameter data that are associated, wherein, whether the first operation parameter is associated with the energy-saving target is determined by comparing the average utilization frequency of the first operation parameter in all historical energy-saving adjustment scenarios with the same energy-saving target of the electric water supply pump within a preset time period with the set target utilization threshold. When the average utilization frequency of the first operation parameter is greater than the set target utilization threshold, the current first operation parameter is determined to be associated with the corresponding energy-saving target; the set target utilization threshold refers to the set utilization rate of the first operation parameter under different energy-saving targets, which is represented by the maximum value of the average utilization rate difference among the average utilization rate differences of all first operation parameters in the corresponding historical energy-saving adjustment scenarios with different energy-saving targets within the preset time period.

[0067] In this embodiment, the set operating value is the expected operating parameter value of the electric water supply pump extracted from a pre-set parameter-set operation mapping table; the operating condition prediction result refers to the state assessment level and expected operating data of the electric water supply pump, wherein the state assessment level includes three levels: level one, level two and level three.

[0068] The beneficial effect of the above technical solution is: by preprocessing the target operating data obtained by monitoring the operating status of the electric water supply pump, and performing deviation analysis with the set operating value, the operating condition of the current electric water supply pump can be estimated, providing data support for subsequently improving the efficiency of the water supply pump and reducing the loss of the hydraulic coupling.

[0069] The embodiment of the present invention provides a method for automatic control of an electric water supply pump, which performs deviation analysis on the target operation data and the corresponding set operation value, and estimates the operating condition of the current electric water supply pump according to the deviation analysis result to obtain the operating condition estimation result, including:

[0070] Extract the parameter-setting operation mapping table of the current electric feedwater pump from the feedwater pump database;

[0071] Select a set operation value from the parameter-set operation mapping table and subtract the corresponding target operation data to perform a subtraction operation to obtain a first target deviation value;

[0072] Based on the first target deviation value, the operating state evaluation coefficient of the electric water supply pump is calculated, the state evaluation level of the current electric water supply pump is determined, and the result is output as the operating condition prediction result;

[0073] The expected operating data of the electric water supply pump is calculated based on the first target deviation value by using the set control strategy and output as the operating condition prediction result.

[0074] In this embodiment, the water supply pump database is composed of the ID, model, actual operating parameter data, expected operating parameter values ​​and parameter-set operation mapping table of the electric water supply pump, wherein the parameter-set operation mapping table is composed of operating parameters and corresponding expected operating parameter values; the first target deviation value refers to the value of the set operating value minus the target operating data; the operating status evaluation coefficient is a value obtained by comparing and comprehensively calculating the target operating data of the electric water supply pump and the first target deviation value of the set operating value with the set upper and lower limits of the deviation threshold, that is, it is used to characterize the current operating status of the electric water supply pump based on the analysis results of the deviation of the target operating data, and provide data support for the subsequent determination of the status evaluation level of the electric water supply pump; the status evaluation level includes three levels: level one, level two and level three, which are determined by analyzing the operating status evaluation coefficient; the set control strategy refers to the PID control strategy; the expected operating data is the operating parameter data calculated based on the first target deviation value by using the set control strategy; the operating condition prediction result refers to the status evaluation level and expected operating data of the electric water supply pump.

[0075] The beneficial effects of the above technical solution are: by evaluating and determining the level of the electric water supply pump, it is helpful to select the subsequent adjustment strategy; introducing a control strategy to determine the expected operating data of the electric water supply pump based on the first target deviation value provides a clear goal for the subsequent optimized operation of the electric water supply pump.

[0076] An embodiment of the present invention provides a method for automatic control of an electric water supply pump, which calculates an operating state evaluation coefficient of the electric water supply pump based on the first target deviation value, determines a current state evaluation level of the electric water supply pump, and outputs the result as an operating condition prediction result, including:

[0077] Based on the first target deviation value, calculating the operating state evaluation coefficient of the current electric water supply pump;

[0078] Compare and analyze the operating status evaluation coefficient with the set evaluation threshold range. When the operating status evaluation coefficient belongs to the set evaluation threshold range, determine that the current state evaluation level of the electric water supply pump is level one, and output it as the working condition prediction result;

[0079] When the operating state evaluation coefficient is less than the set evaluation threshold lower limit, the current state evaluation level of the electric water supply pump is determined to be level 2 and is output as the operating condition prediction result;

[0080] When the operating state evaluation coefficient is greater than the set upper limit of the evaluation threshold, the current state evaluation level of the electric water supply pump is determined to be level three and is output as the operating condition prediction result;

[0081] The calculation formula of the operating status evaluation coefficient is as follows:

[0082] Wherein, B represents the operating status evaluation coefficient of the current electric water supply pump; n represents the total number of target operating data whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; x i It is represented by the first target deviation value corresponding to the i-th target operation data of the current electric water supply pump whose first target deviation value from the set operation value is greater than the set deviation threshold upper limit, where i=1, 2, 3, ..., n; x i0 ; It is represented as the average value of the first target deviation values ​​of all target operating data of the current electric water supply pump whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; It is represented by the evaluation weight value of the operating state of the electric water supply pump for the numerical deviation degree of the i-th target operating data whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; m is represented by the total number of target operating data whose first target deviation value from the set operating value is less than the set deviation threshold lower limit; y j It is represented by the first target deviation value corresponding to the jth target operation data of the current electric water supply pump whose first target deviation value from the set operation value is less than the lower limit of the set deviation threshold, where j=1, 2, 3, ..., m; It is represented as the average value of the first target deviation values ​​of all target operating data in the current electric water supply pump whose first target deviation value from the set operating value is less than the lower limit of the set deviation threshold; ω j It is expressed as the evaluation weight value of the operating state of the electric water supply pump, which is expressed as the degree of numerical deviation of the jth target operating data whose first target deviation value from the set operating value is less than the set deviation threshold lower limit.

[0083] In this embodiment, the first target deviation value refers to the value obtained by subtracting the target operation data from the set operation value; the operation state evaluation coefficient is a value obtained by comprehensively calculating by comparing the first target deviation value between the target operation data and the set operation value of the motor-driven feed water pump with the upper and lower limits of the set deviation threshold, that is, it is used to characterize the current operation state of the motor-driven feed water pump based on the analysis result of the deviation situation of the target operation data, and provides data support for determining the state evaluation level of the motor-driven feed water pump in the follow-up; the set evaluation threshold range is preset and consists of the set evaluation threshold upper limit and the set evaluation threshold lower limit; the working condition prediction result refers to the state evaluation level of the motor-driven feed water pump and the expected operation data, where the state evaluation level includes three levels: level one, level two, and level three.

[0084] In this embodiment, for example, there are motor-driven feed water pumps r1 and r2, and the operation state evaluation coefficients are l1 and l2 respectively, and a < l1 < b, that is, l1 belongs to the set evaluation threshold range [a, b], and l2 > b; at this time, it is determined that the state evaluation level of the motor-driven feed water pump r1 is level one, and the state evaluation level of the motor-driven feed water pump r2 is level three; where a represents the set evaluation threshold lower limit; b represents the set evaluation threshold upper limit, and [a, b] represents the set evaluation threshold range.

[0085] The beneficial effect of the above technical solution is that by calculating the operation state evaluation coefficient to determine the state evaluation level of the current motor-driven feed water pump, it helps to quickly judge the operation state of the motor-driven feed water pump, so as to select the most suitable adjustment strategy to adjust the feed water pump.

[0086] The embodiment of the present invention provides a method for automatic control of a motor-driven feed water pump. Based on the analysis of the working condition prediction result, a target adjustment strategy is generated, including:

[0087] Extract the operation-adjustment strategy table that matches the state evaluation level of the current motor-driven feed water pump from the feed water pump adjustment database;

[0088] If a single first parameter adjustment strategy is extracted from the operation-adjustment strategy table according to the current expected operation data, then the current first parameter adjustment strategy is regarded as the selected adjustment strategy;

[0089] If multiple first parameter adjustment strategies are extracted from the operation-adjustment strategy table according to the current expected operation data, then all the currently extracted first parameter adjustment strategies are marked as screening strategies;

[0090] Extract the corresponding historical adjustment effect evaluation coefficients for adjusting the operation parameters using the screening strategy within a preset time period and take the average to obtain the strategy evaluation coefficient;

[0091] Regard the screening strategy with the largest strategy evaluation coefficient as the selected adjustment strategy;

[0092] When there are strategy-associated parameters in the selected regulation strategy, the strategy-associated parameters are adjusted based on the load change of the electric water supply pump and the demand for adjustment of the operating parameters, and a target regulation strategy is generated and output.

[0093] In this embodiment, the water supply pump regulation database is composed of the operating parameters of the water supply pump, parameter adjustment strategies and operation-adjustment strategy tables of different status evaluation levels; the status evaluation levels include level one, level two and level three, which are determined by analyzing the operating status evaluation coefficients; the operation-adjustment strategy table is composed of operating parameters and corresponding parameter adjustment strategies.

[0094] In this embodiment, the selected adjustment strategy refers to the strategy that is most suitable for adjusting the current expected operation data obtained by screening and analyzing from the operation-adjustment strategy table; the screening strategy refers to a plurality of first parameter adjustment strategies extracted from the operation-adjustment strategy table based on the current expected operation data; the preset time period is predetermined; the historical adjustment effect evaluation coefficient is used to quantify the historical adjustment effect on the operation parameters of the water supply pump, which is represented by the historical difference between the historical set operation value and the corresponding historical adjusted operation parameter value; the strategy evaluation coefficient is represented by the average value of all historical adjustment effect evaluation coefficients of the operation parameters adjusted by using the screening strategy within the preset time period; Strategy-associated parameters refer to adjustable parameters that affect the parameter adjustment effect in the selected adjustment strategy. They are determined by summarizing the historical adjustment data of the water pump in various historical energy-saving adjustment scenarios. For example, the current energy-saving goal of the electric water pump is to reduce the loss of the hydraulic coupling, and the selected adjustment strategy is to increase the rated output speed of the hydraulic coupling. At this time, the strategy-associated parameter refers to the scoop tube position; the current energy-saving goal of the electric water pump is to improve the efficiency of the water pump, and the selected adjustment strategy is to adjust the start and stop frequency of the water pump. At this time, the strategy-associated parameter refers to the start and stop interval time of the water pump; the target adjustment strategy is a strategy generated after adjusting the strategy-associated parameters in the selected adjustment strategy.

[0095] The beneficial effect of the above technical solution is: by extracting an operation-adjustment strategy table that matches the current electric water pump status assessment level from the water pump regulation database, and selecting, evaluating and adjusting the regulation strategy based on the expected operating data, the scientificity and comprehensiveness of the regulation strategy can be effectively improved, which is beneficial to improving the regulation effect of subsequent water pumps.

[0096] The embodiment of the present invention provides a method for automatic control of an electric water supply pump, which adjusts the strategy-related parameters in the selected adjustment strategy based on the load change of the current electric water supply pump, generates a target adjustment strategy and outputs it, including:

[0097] Acquire and establish a water supply pump-load curve diagram based on the load data of the electric water supply pump within a preset time period;

[0098] Extracting the trend characteristics of the water supply pump-load curve diagram and performing weighted averaging to calculate the load variation coefficient;

[0099] Combine the load variation coefficient with the expected operation data for analysis, calculate the adjustment coefficient, adjust the key strategy parameters, and obtain the adjusted parameter values;

[0100] The calculation formula of the adjustment coefficient is as follows:

[0101] Where P is the adjustment coefficient; γ is the correlation factor between the key parameter of the current strategy and the operating parameter adjusted by the selected adjustment strategy; c1 is the expected operating data of the operating parameter adjusted by the selected adjustment strategy of the key parameter of the current strategy; c0 is the target operating data of the operating parameter adjusted by the selected adjustment strategy of the key parameter of the current strategy; ∈ k It is represented as the corresponding load variation coefficient of the kth load, and its value range is (0, 1), where k = 1, 2, ..., o; o is the total number of load categories, and the loads are flow load, pressure load and power load respectively; θ k It represents the dependency coefficient between the operating parameters adjusted by the selected adjustment strategy of the key parameters of the current strategy and the k-th type of load, and the value range is (0, 1); ln represents the natural logarithm; e represents the base of the natural logarithm;

[0102] After adjusting the policy-associated parameters in the selected adjustment policy to corresponding adjusted parameter values, the parameters are output as the target adjustment policy.

[0103] In this embodiment, the preset time period is pre-set; the water pump-load curve diagram is a curve constructed in time series by taking the load data of the electric water pump within the preset time period as the dependent variable; the trend characteristics include curve acceleration, curvature, slope, and the difference between the extreme value and the average value; the load change coefficient is a numerical value obtained by weighting and averaging the trend characteristics, which is used to express the degree of load change of the water pump within the preset time period, wherein the weight assigned to the trend characteristics is obtained by solving a matrix constructed after pairwise comparison and relative importance scoring of the trend characteristics using the hierarchical analysis method; the target adjustment strategy is a strategy generated after adjusting the strategy association parameters in the fixed adjustment strategy.

[0104] The beneficial effect of the above technical solution is: by adjusting the strategy-related parameters existing in the selected regulation strategy and generating the target regulation strategy, the scientificity and comprehensiveness of the regulation strategy can be guaranteed, thereby effectively improving the regulation effect of the subsequent water supply pump.

[0105] The embodiment of the present invention provides a method for automatic control of an electric water supply pump, wherein the actuator responds to the target adjustment strategy, including:

[0106] Generate a target adjustment instruction according to the target adjustment strategy and transmit it to the execution mechanism;

[0107] The actuator adjusts the operating parameters of the current electric water supply pump according to the received target adjustment instruction;

[0108] Use the set monitoring tool to detect the operating status of the current electric water supply pump after parameter adjustment, and obtain the adjusted operating data;

[0109] Performing deviation analysis on the adjusted operating data and the expected operating data to obtain an absolute value of the adjusted deviation;

[0110] If the absolute value of the adjustment deviation is greater than the set adjustment deviation threshold, the target adjustment strategy is re-determined and the corresponding target adjustment instruction is generated and output to the actuator to readjust the operating parameters until the current operating state of the electric water supply pump after adjustment reaches the preset target state.

[0111] In this embodiment, the target adjustment instruction refers to the corresponding specific adjustment signal converted from the target adjustment strategy; the actuator refers to a device that adjusts the operating parameters of the electric water supply pump in response to the target adjustment strategy, improves the efficiency of the water supply pump, and thereby achieves energy-saving transformation of the water supply pump, such as a hydraulic coupling or an electric actuator; the set monitoring tool refers to various sensors used to collect the operating status data of the electric water supply pump, such as a pressure sensor; the adjusted operating data refers to the actual operating parameter values ​​of the electric water supply pump after the operating parameters are adjusted in response to the target adjustment instruction, which are collected using the set monitoring tool, including power consumption, operating efficiency, speed, flow, pressure, and hydraulic coupling efficiency and loss; the absolute value of the adjustment deviation refers to the absolute difference obtained by comparing the difference between the expected operating data and the adjusted operating data; the set adjustment deviation threshold is predetermined; the preset target state means that the adjustment deviation values ​​of the adjusted operating data of the electric water supply pump and the expected operating data do not exceed the set adjustment deviation threshold.

[0112] In this embodiment, for example, there are regulated operation data s1, s2, and s3 obtained after energy-saving regulation of the electric water supply pump r3, and the absolute values ​​of the regulation deviations from the corresponding expected operation data are 0.15, 0.05, and 0.1, respectively, wherein 0.15, 0.05, and 0.1 are all less than the set regulation deviation threshold (e 0.2 -1), at this time, there is no need to redefine the target adjustment strategy to adjust the water supply pump for energy saving.

[0113] The beneficial effects of the above technical solution are: by generating adjustment instructions according to the target adjustment strategy, the actuator adjusts the operating parameters; the deviation analysis is performed on the results after the parameter adjustment and the process of re-adjustment is performed according to the deviation analysis results, until the current electric water supply pump reaches the preset target state after adjustment, which can effectively improve the adjustment accuracy and efficiency of the electric water supply pump.

[0114] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for automatic control of an electric water supply pump, characterized in that: include: Step 1: Monitor and analyze the operating status of the electric water supply pump in real time, obtain target operating data, estimate the operating condition of the current electric water supply pump, and obtain the operating condition estimation result; Step 2: generating a target adjustment strategy based on the analysis of the predicted results of the working condition; Step 3: The actuator responds to the target regulation strategy.

2. The method for automatic control of an electric water supply pump according to claim 1, characterized in that: Monitor and analyze the operating status of the electric water supply pump in real time, obtain the target operating data, evaluate the current operating status of the electric water supply pump, and obtain the operating condition evaluation results, including: Using a set monitoring tool installed at a preset position to monitor the operating state of the electric water supply pump in real time to obtain first operating parameter data; Filtering data associated with the energy-saving target of the water supply pump from the first operating parameter data to perform data preprocessing to obtain target operating data; A deviation analysis is performed on the target operating data and the corresponding set operating values, and the operating condition of the current electric water supply pump is estimated based on the deviation analysis result to obtain an operating condition estimation result.

3. The method for automatic control of an electric water supply pump according to claim 2, characterized in that: The target operating data include the speed, pressure, flow rate of the water supply pump and the motor shaft speed and output speed of the hydraulic coupling.

4. The method for automatic control of an electric water supply pump according to claim 2, characterized in that: The target operating data and the corresponding set operating value are analyzed for deviations, and the operating condition of the current electric water supply pump is estimated according to the deviation analysis result to obtain the operating condition estimation result, including: Extract the parameter-setting operation mapping table of the current electric feedwater pump from the feedwater pump database; Select a set operation value from the parameter-set operation mapping table and subtract the corresponding target operation data to perform a subtraction operation to obtain a first target deviation value; Based on the first target deviation value, the operating state evaluation coefficient of the electric water supply pump is calculated, the state evaluation level of the current electric water supply pump is determined, and the result is output as the operating condition prediction result; The expected operating data of the electric water supply pump is calculated based on the first target deviation value by using the set control strategy and output as the operating condition prediction result.

5. The method for automatic control of an electric water supply pump according to claim 4, characterized in that: Based on the first target deviation value, the operating state evaluation coefficient of the electric water supply pump is calculated, the state evaluation level of the current electric water supply pump is determined, and output as the operating condition prediction result, including: Based on the first target deviation value, calculating the operating state evaluation coefficient of the current electric water supply pump; Compare and analyze the operating status evaluation coefficient with the set evaluation threshold range. When the operating status evaluation coefficient belongs to the set evaluation threshold range, determine that the current state evaluation level of the electric water supply pump is level one, and output it as the working condition prediction result; When the operating state evaluation coefficient is less than the set evaluation threshold lower limit, the current state evaluation level of the electric water supply pump is determined to be level 2 and is output as the operating condition prediction result; When the operating state evaluation coefficient is greater than the set upper limit of the evaluation threshold, the current state evaluation level of the electric water supply pump is determined to be level three and is output as the operating condition prediction result; The calculation formula of the operating status evaluation coefficient is as follows: Wherein, B represents the operating status evaluation coefficient of the current electric water supply pump; n represents the total number of target operating data whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; x i It is represented by the first target deviation value corresponding to the i-th target operation data of the current electric water supply pump whose first target deviation value from the set operation value is greater than the set deviation threshold upper limit, where i=1, 2, 3, ..., n; x i0 ; It is represented as the average value of the first target deviation values ​​of all target operating data of the current electric water supply pump whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; It is represented by the evaluation weight value of the operating state of the electric water supply pump for the numerical deviation degree of the i-th target operating data whose first target deviation value from the set operating value is greater than the set deviation threshold upper limit; m is represented by the total number of target operating data whose first target deviation value from the set operating value is less than the set deviation threshold lower limit; y j It is represented by the first target deviation value corresponding to the jth target operation data of the current electric water supply pump whose first target deviation value from the set operation value is less than the lower limit of the set deviation threshold, where j=1, 2, 3, ..., m; It is represented as the average value of the first target deviation values ​​of all target operating data in the current electric water supply pump whose first target deviation value from the set operating value is less than the lower limit of the set deviation threshold; ω j It is expressed as the evaluation weight value of the operating state of the electric water supply pump, which is expressed as the degree of numerical deviation of the jth target operating data whose first target deviation value from the set operating value is less than the set deviation threshold lower limit.

6. The method for automatic control of an electric water supply pump according to claim 1, characterized in that: Based on the analysis of the predicted results of the working condition, a target adjustment strategy is generated, including: Extracting an operation-adjustment strategy table matching the current state assessment level of the electric feedwater pump from a feedwater pump regulation database; If a single first parameter adjustment strategy is extracted from the operation-adjustment strategy table according to the current expected operation data, the current first parameter adjustment strategy is regarded as the selected adjustment strategy; If multiple first parameter adjustment strategies are extracted from the operation-adjustment strategy table according to the current expected operation data, all the first parameter adjustment strategies currently extracted are marked as screening strategies; Extract the corresponding historical adjustment effect evaluation coefficients of the operation parameter adjustment using the screening strategy within a preset time period and calculate the average to obtain the strategy evaluation coefficient; The screening strategy with the largest strategy evaluation coefficient is regarded as the selected adjustment strategy; When there are strategy-associated parameters in the selected regulation strategy, the strategy-associated parameters are adjusted based on the load change of the electric water supply pump and the demand for adjustment of the operating parameters, and a target regulation strategy is generated and output.

7. The method for automatic control of an electric water supply pump according to claim 6, characterized in that: The strategy-related parameters in the selected regulation strategy are adjusted based on the load change of the current electric water supply pump, and a target regulation strategy is generated and output, including: Acquire and establish a water supply pump-load curve diagram based on the load data of the electric water supply pump within a preset time period; Extracting the trend characteristics of the water supply pump-load curve diagram and performing weighted averaging to calculate the load variation coefficient; Combine the load variation coefficient with the expected operation data for analysis, calculate the adjustment coefficient, adjust the key strategy parameters, and obtain the adjusted parameter values; The calculation formula of the adjustment coefficient is as follows: Where P is the adjustment coefficient; γ is the correlation factor between the key parameter of the current strategy and the operating parameter adjusted by the selected adjustment strategy; c1 is the expected operating data of the operating parameter adjusted by the selected adjustment strategy of the key parameter of the current strategy; c0 is the target operating data of the operating parameter adjusted by the selected adjustment strategy of the key parameter of the current strategy; ∈ k It is represented as the corresponding load variation coefficient of the kth load, and its value range is (0, 1, where k = 1, 2, ..., o; o represents the total number of load categories, and the loads are flow load, pressure load and power load respectively; θ k It represents the dependency coefficient between the operating parameters adjusted by the selected adjustment strategy of the key parameters of the current strategy and the k-th type of load, and the value range is (0, 1; ln represents the natural logarithm; e represents the base of the natural logarithm; After adjusting the policy-associated parameters in the selected adjustment policy to corresponding adjusted parameter values, the parameters are output as the target adjustment policy.

8. The method for automatic control of an electric water supply pump according to claim 1, characterized in that: The actuator responds to the target adjustment strategy, including: Generate a target adjustment instruction according to the target adjustment strategy and transmit it to the execution mechanism; The actuator adjusts the operating parameters of the current electric water supply pump according to the received target adjustment instruction; Use the set monitoring tool to detect the operating status of the current electric water supply pump after parameter adjustment, and obtain the adjusted operating data; Performing deviation analysis on the adjusted operating data and the expected operating data to obtain an absolute value of the adjusted deviation; If the absolute value of the adjustment deviation is greater than the set adjustment deviation threshold, the target adjustment strategy is re-determined and the corresponding target adjustment instruction is generated and output to the actuator to readjust the operating parameters until the current operating state of the electric water supply pump after adjustment reaches the preset target state.

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