Method for correcting overflowing flow of wide-load rotating wheel for ecological flow power generation

Abstract

The invention discloses a method for correcting the overflowing flow of a wide-load rotating wheel for ecological flow power generation, and belongs to the technical field of wide-load rotating wheels, and the method comprises the steps: collecting the historical operation data of the wide-load rotating wheel, carrying out the preprocessing, and constructing a wide-load rotating wheel overflowing flow mathematical model; analyzing the real-time operation data of the wide-load rotating wheel, calculating the over-current flow of the wide-load rotating wheel, and determining the over-current flow result of the wide-load rotating wheel; and analyzing the over-current flow result of the wide-load runner, and correcting the over-current flow of the wide-load runner according to the analysis condition, so that the over-current flow meets the ecological flow requirement. The method solves the problems that in the prior art, the overflowing flow of the wide-load rotating wheel cannot be effectively corrected according to the requirement of a river ecological system, the ecological flow requirement cannot be met, and the power generation efficiency is reduced. According to the method, the overflowing flow of the wide-load rotating wheel can be effectively corrected according to the requirements of a river ecological system, the using effect of the wide-load rotating wheel is improved, the ecological flow requirements can be well met, and the power generation efficiency is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of wide-load runners, and specifically to a method for correcting the flow rate of a wide-load runner for ecological flow power generation. Background Technique

[0002] The Francis turbine has the characteristics of a wide range of adaptable water heads and simple structure, and is the most widely used type of hydroelectric power station, accounting for about 80% of the installed hydroelectric capacity. With the gradual increase in the grid connection scale of intermittent renewable energy sources such as wind energy and solar energy, the access of large-capacity unstable power supplies to the power grid will inevitably lead to a significant reduction in the safety of the long-term stable operation of the power system. Therefore, another important function of hydropower generation is to regulate the grid connection and complementarity of intermittent energy sources such as wind energy and solar energy at the present stage, and the high-frequency and wide-load operation of Francis turbine units has become the main force for hydropower generation to regulate the grid balance.

[0003] The Chinese patent application with the publication number CN118934395A discloses a wide-load turbine tail water vortex band suppression stepless adjustment system and its use method, including a Francis turbine unit, a flow disturbance device, a high-pressure pipe manifold, an actuator and its use method. The Francis turbine unit includes an intake section, a spiral case, movable guide vanes, a runner, and a draft tube, which realizes the function of converting fluid potential energy and kinetic energy into mechanical energy; the flow disturbance device includes a flow disturbance plate and a fixing member, which realizes the function of changing the flow state of the fluid in the draft tube; the actuator includes a hydraulic cylinder seat, a hydraulic cylinder, and a telescopic shaft, and by controlling the telescopic shaft, the spatial position state of the flow disturbance plate is changed, so as to realize the function of changing the flow state of the fluid in the draft tube under multiple working conditions. However, this patent has the following defects: The existing technology cannot effectively correct the flow rate of the wide-load runner according to the needs of the river ecosystem, resulting in poor use effects of the wide-load runner, not only unable to better meet the ecological flow requirements, but also reducing the power generation efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for correcting the flow rate of a wide-load runner for ecological flow power generation, which can effectively correct the flow rate of the wide-load runner according to the needs of the river ecosystem, improve the use effect of the wide-load runner, can better meet the ecological flow requirements, and optimize the power generation efficiency, and solves the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A method for correcting the flow rate of a wide-load runner for ecological flow power generation, including: According to the needs of the river ecosystem, collect the historical operation data of the wide-load runner and preprocess it to construct a mathematical model of the flow rate of the wide-load runner; Analyze the real-time operation data of the wide-load runner according to the mathematical model of the flow rate through the wide-load runner, calculate the flow rate through the wide-load runner, and determine the result of the flow rate through the wide-load runner; Analyze the result of the flow rate through the wide-load runner, correct the flow rate through the wide-load runner according to the analysis situation, adjust the real-time operation data of the wide-load runner in real time, and close-loop optimize the correction method of the flow rate through the wide-load runner to meet the ecological flow requirements.

[0006] Preferably, collect the historical operation data of the wide-load runner, including: Collect the runner diameter, number of blades, blade angle, geometric shape of the runner inlet and outlet, rated flow rate and rated power of the wide-load runner to determine the design parameters of the wide-load runner; Collect the water head, flow rate, rotational speed, guide vane opening, sediment content, water temperature, air pressure and humidity during the operation of the wide-load runner to determine the operation parameters of the wide-load runner; Collect the ecological flow required for the health of the river ecosystem, determine the required ecological flow value, and analyze the flow characteristics through the wide-load runner under different loads in combination with the hydrological conditions in different seasons and periods to determine the ecological flow requirements of the wide-load runner; Determine the historical operation data of the wide-load runner according to the design parameters, operation parameters and ecological flow requirements of the wide-load runner.

[0007] Preferably, preprocess the collected historical operation data of the wide-load runner, including: Clean the historical operation data of the wide-load runner to remove the noise data that is useless for correcting the flow rate through the wide-load runner in the historical operation data of the wide-load runner; Check the historical operation data of the wide-load runner, identify the duplicate values, missing values and outliers in the historical operation data of the wide-load runner, remove the duplicate values in the historical operation data of the wide-load runner, and retain the unique data records; Judge whether the missing values and outliers in the historical operation data of the wide-load runner are useful for correcting the flow rate through the wide-load runner. If useful, fill the missing values in the historical operation data of the wide-load runner with the average value, and replace the outliers in the historical operation data of the wide-load runner with the median. If not useful, directly delete the missing values and outliers in the historical operation data of the wide-load runner.

[0008] Preferably, the preprocessing of the collected historical operation data of the wide-load runner also includes: Normalize the historical operation data of the wide-load runner to convert the historical operation data of the wide-load runner into a unified data format, remove the dimensional differences in the historical operation data of the wide-load runner, and determine the standardized historical operation data of the wide-load runner; Extract features from the historical operation data of the wide-load runner, extract the features useful for correcting the flow rate through the wide-load runner from the historical operation data of the wide-load runner, and determine the historical operation characteristic data of the wide-load runner.

[0009] Preferably, construct a mathematical model for the flow rate through the wide-load runner, including: Divide the historical operation characteristic data of the wide-load runner to determine the training set and the test set; Based on machine learning technology, use the training set to train the machine learning model, enable the machine learning model to autonomously learn the calculation behavior of the flow rate through the wide-load runner, and predict the flow rate through the wide-load runner to determine the mathematical model of the flow rate through the wide-load runner based on machine learning; Use the test set to test the mathematical model of the flow rate through the wide-load runner based on machine learning, and evaluate whether the mathematical model of the flow rate through the wide-load runner based on machine learning can achieve the expected effect; According to the test evaluation results, adjust the parameters of the mathematical model of the flow rate through the wide-load runner based on machine learning, and continuously optimize the mathematical model of the flow rate through the wide-load runner based on machine learning to determine the best mathematical model of the flow rate through the wide-load runner.

[0010] Preferably, calculate the flow rate through the wide-load runner, including: Obtain the best mathematical model of the flow rate through the wide-load runner, and deploy the best mathematical model of the flow rate through the wide-load runner in the actual environment for correcting the flow rate through the wide-load runner; Collect the real-time operation data of the wide-load runner, input the collected real-time operation data of the wide-load runner into the best mathematical model of the flow rate through the wide-load runner, analyze the real-time operation data of the wide-load runner according to the best mathematical model of the flow rate through the wide-load runner, calculate the flow rate through the wide-load runner, and determine the result of the flow rate through the wide-load runner.

[0011] Preferably, correct the flow rate through the wide-load runner, including: Compare and analyze the result of the flow rate through the wide-load runner with the set ecological flow threshold to determine whether the flow rate through the wide-load runner meets the ecological flow requirement; When the flow rate through the wide-load runner does not meet the ecological flow requirement, formulate a method for correcting the flow rate through the wide-load runner, and apply the method for correcting the flow rate through the wide-load runner to the actual ecological flow power generation process; Based on the formulated method for correcting the flow rate through the wide-load runner, correct the flow rate through the wide-load runner and adjust the real-time operation data of the wide-load runner in real time; Monitor the corrected flow rate of the wide-load runner in real time, verify whether the corrected flow rate of the wide-load runner meets the ecological flow requirements, and perform closed-loop optimization on the correction method of the wide-load runner's flow rate according to the verification results to make it meet the ecological flow requirements.

[0012] Preferably, the correction method for the flow rate of the wide-load runner is to adjust the guide vane opening and the rotational speed of the wide-load runner to correct the flow rate.

[0013] Preferably, when the flow rate of the wide-load runner does not meet the ecological flow requirements, the correction method for the flow rate of the wide-load runner is formulated, including: Obtain the flow difference between the flow rate result of the wide-load runner and the set ecological flow threshold. When the flow difference is positive, determine the adjustment method as reducing the guide vane opening and reducing the rotational speed of the runner. When the flow difference is negative, determine the adjustment method as increasing the guide vane opening and increasing the rotational speed of the runner; Based on the operating conditions of the wide-load runner, set the primary opening adjustment amplitude of the guide vane opening and the primary rotational speed adjustment amplitude of the runner rotational speed. Adjust the wide-load runner according to the primary opening adjustment amplitude and the primary rotational speed adjustment amplitude, and obtain the current operating data after adjustment.

[0014] Preferably, the correction method for the flow rate of the wide-load runner further includes: Input the current operating data into the mathematical model of the wide-load runner's flow rate to obtain the current flow rate result of the wide-load runner; Based on the latest difference between the current flow rate result and the set ecological flow threshold, perform fine-tuning according to the adjustment method, the primary opening adjustment amplitude, and the primary rotational speed adjustment amplitude, and repeat the adjustment until the latest flow rate result meets the ecological flow requirements; When the operating state of the wide-load runner meets the ecological flow requirements, obtain the current operating efficiency of the wide-load runner; Judge whether the current operating efficiency is not less than the historical operating efficiency; If so, maintain the current operating parameters for operation; Otherwise, optimize the guide vane opening and the runner rotational speed. Specifically: Fine-tune the guide vane opening in the opposite direction to the previous adjustment according to the primary opening adjustment amplitude, and adaptively fine-tune the runner rotational speed according to the primary rotational speed adjustment amplitude based on the ecological flow requirements. After cycling the above optimization method to the preset number of times, judge whether the latest operating efficiency is not less than the historical operating efficiency; If so, maintain the optimized operating parameters for operation; Otherwise, fine-tune the runner speed in the direction opposite to the previous adjustment by one rotational speed adjustment amplitude, and adaptively fine-tune the guide vane opening by one opening adjustment amplitude based on the ecological flow demand; When optimizing both the guide vane opening and the runner speed cannot make the latest operating efficiency greater than or equal to the historical operating efficiency, it is determined that the operating states of the guide vane opening and the runner speed do not affect the operating efficiency, and other operating parameters are checked.

[0015] Compared with the prior art, the beneficial effects of the present invention are: According to the requirements of the river ecosystem, the present invention determines the required ecological flow value and the hydrological conditions in different seasons and periods, analyzes the flow-through characteristics of the water turbine runner under different loads, collects and preprocesses the historical operating data of the wide-load runner, establishes a mathematical model for the flow-through flow of the wide-load runner, analyzes the real-time operating data of the wide-load runner according to the mathematical model of the flow-through flow of the wide-load runner, calculates the flow-through flow of the wide-load runner, determines the result of the flow-through flow of the wide-load runner, analyzes the result of the flow-through flow of the wide-load runner, corrects the flow-through flow of the wide-load runner according to the analysis situation, adjusts the real-time operating data of the wide-load runner in real time, and closes the loop to optimize the correction method of the flow-through flow of the wide-load runner to make it meet the ecological flow demand. It can effectively correct the flow-through flow of the wide-load runner according to the requirements of the river ecosystem, improve the use effect of the wide-load runner, not only better meet the ecological flow demand, but also optimize the power generation efficiency. Brief Description of the Drawings

[0016] Figure 1 It is a flowchart of the correction method for the flow-through flow of the wide-load runner of the present invention. Detailed Embodiments

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] To solve the problem that the existing technology cannot effectively correct the flow-through flow of the wide-load runner according to the requirements of the river ecosystem, resulting in poor use effect of the wide-load runner, which not only cannot better meet the ecological flow demand, but also reduces the power generation efficiency, please refer to Figure 1 This embodiment provides the following technical solutions: A correction method for the flow-through flow of a wide-load runner for ecological flow power generation, including: According to the requirements of the river ecosystem, collect the historical operation data of the wide-load runner, preprocess it, and then construct a mathematical model for the flow rate passing through the wide-load runner. In this embodiment, collect the historical operation data of the wide-load runner, including: Collect the runner diameter, number of blades, blade angle, inlet and outlet geometries of the runner, rated flow rate, and rated power of the wide-load runner to determine the design parameters of the wide-load runner. Collect the water head, flow rate, rotational speed, guide vane opening, sediment content, water temperature, air pressure, and humidity during the operation of the wide-load runner to determine the operation parameters of the wide-load runner. It should be noted that the water head is the difference between the upstream water level and the downstream water level, and the change in the water head will affect the flow rate and power output; the flow rate is the actual flow rate passing through the water turbine, which is affected by control parameters such as the guide vane opening and rotational speed; the rotational speed is the actual operating rotational speed of the water turbine, and the change in the rotational speed will affect the flow rate and efficiency; the guide vane opening is the opening angle of the guide vane, which directly affects the flow area and flow rate; the sediment content is the sediment content in the water flow, which will affect the flow capacity and efficiency of the runner; the change in water temperature will affect the density and viscosity of water, and thus affect the flow characteristics; air pressure and humidity have an indirect impact on the water flow characteristics.

[0019] Collect the ecological flow rate required for the health of the river ecosystem, determine the required ecological flow rate value, and combine the hydrological conditions in different seasons and periods to analyze the flow characteristics of the wide-load runner under different loads, and determine the ecological flow rate requirements of the wide-load runner. According to the design parameters, operation parameters, and ecological flow rate requirements of the wide-load runner, determine the historical operation data of the wide-load runner.

[0020] It should be noted that according to the requirements of the river ecosystem, such as fish migration, vegetation growth, water quality maintenance, etc., determine the required ecological flow rate value, as well as the hydrological conditions in different seasons and periods, such as the dry season, flood season, etc., and analyze the flow characteristics of the water turbine runner under different loads. Among them, studying the flow characteristics of the water turbine runner under different loads includes the relationships between the flow rate, water head, rotational speed, and efficiency, considering the influence of the design parameters of the water turbine, such as the runner diameter, blade angle, rated flow rate, etc., on the flow capacity, and analyzing the influence of actual operating conditions, such as water level fluctuations, sediment content, etc., on the flow rate passing through.

[0021] In this embodiment, preprocess the collected historical operation data of the wide-load runner, including: Clean the historical operation data of the wide-load runner to remove the noise data that is useless for correcting the flow rate passing through the wide-load runner in the historical operation data of the wide-load runner. Check the historical operation data of the wide-load runner, identify duplicate values, missing values, and outliers in the historical operation data of the wide-load runner, remove the duplicate values in the historical operation data of the wide-load runner, and retain the unique data records; Judge whether the missing values and outliers in the historical operation data of the wide-load runner are useful for the correction of the flow rate through the wide-load runner. If useful, fill the missing values in the historical operation data of the wide-load runner with the average value, and replace the outliers in the historical operation data of the wide-load runner with the median value. If not useful, directly delete the missing values and outliers in the historical operation data of the wide-load runner.

[0022] It should be noted that by cleaning the historical operation data of the wide-load runner, noise data, duplicate values, and missing values and outliers that are useless for the correction of the flow rate through the wide-load runner can be removed, and the missing values and outliers that are useful for the correction of the flow rate through the wide-load runner in the historical operation data of the wide-load runner can be filled and replaced, which can improve the subsequent processing accuracy of the historical operation data of the wide-load runner and improve the data quality.

[0023] In this embodiment, the preprocessing of the collected historical operation data of the wide-load runner further includes: Normalize the historical operation data of the wide-load runner to convert the historical operation data of the wide-load runner into a unified data format, remove the dimension difference in the historical operation data of the wide-load runner, and determine the standardized historical operation data of the wide-load runner; Extract features from the historical operation data of the wide-load runner, extract the features useful for the correction of the flow rate through the wide-load runner from the historical operation data of the wide-load runner, and determine the historical operation feature data of the wide-load runner.

[0024] It should be noted that by normalizing and extracting features from the historical operation data of the wide-load runner, it is convenient to better analyze the historical operation data of the wide-load runner subsequently, and then establish a mathematical model for the flow rate through the wide-load runner.

[0025] In this embodiment, constructing a mathematical model for the flow rate through the wide-load runner includes: Divide the historical operation feature data of the wide-load runner to determine the training set and the test set; Based on machine learning technology, use the training set to train the machine learning model, enable the machine learning model to autonomously learn the calculation behavior of the flow rate through the wide-load runner, and predict the flow rate through the wide-load runner, and determine the mathematical model for the flow rate through the wide-load runner based on machine learning; Use the test set to test the mathematical model for the flow rate through the wide-load runner based on machine learning, and evaluate whether the mathematical model for the flow rate through the wide-load runner based on machine learning can achieve the expected effect; According to the test evaluation results, adjust the parameters of the mathematical model of the wide-load runner's flow-through flow based on machine learning, and continuously optimize the mathematical model of the wide-load runner's flow-through flow to determine the optimal mathematical model of the wide-load runner's flow-through flow. Considering the ecological flow requirements, incorporate the constraint conditions of ecological flow into the model to ensure that the flow distribution meets the ecological protection needs.

[0026] Analyze the real-time operation data of the wide-load runner according to the mathematical model of the wide-load runner's flow-through flow, calculate the flow-through flow of the wide-load runner, and determine the result of the flow-through flow of the wide-load runner; In this embodiment, calculating the flow-through flow of the wide-load runner includes: Obtain the optimal mathematical model of the wide-load runner's flow-through flow, and deploy the optimal mathematical model of the wide-load runner's flow-through flow in the actual correction environment of the wide-load runner's flow-through flow; Collect the real-time operation data of the wide-load runner, input the collected real-time operation data of the wide-load runner into the optimal mathematical model of the wide-load runner's flow-through flow, analyze the real-time operation data of the wide-load runner according to the optimal mathematical model of the wide-load runner's flow-through flow, calculate the flow-through flow of the wide-load runner, and determine the result of the flow-through flow of the wide-load runner.

[0027] It should be noted that by analyzing the real-time operation data of the wide-load runner according to the mathematical model of the wide-load runner's flow-through flow and calculating the flow-through flow of the wide-load runner, it is convenient to correct the flow-through flow of the wide-load runner according to the calculation situation of the flow-through flow of the wide-load runner to make it meet the ecological flow requirements.

[0028] Analyze the result of the flow-through flow of the wide-load runner, correct the flow-through flow of the wide-load runner according to the analysis situation, adjust the real-time operation data of the wide-load runner in real time, and optimize the correction method of the flow-through flow of the wide-load runner in a closed loop to make it meet the ecological flow requirements.

[0029] In this embodiment, correcting the flow-through flow of the wide-load runner includes: Compare and analyze the result of the flow-through flow of the wide-load runner with the set ecological flow threshold to determine whether the flow-through flow of the wide-load runner meets the ecological flow requirements; When the flow-through flow of the wide-load runner does not meet the ecological flow requirements, formulate a correction method for the flow-through flow of the wide-load runner, and apply the correction method for the flow-through flow of the wide-load runner to the actual ecological flow power generation process; Based on the formulated correction method for the flow-through flow of the wide-load runner, correct the flow-through flow of the wide-load runner and adjust the real-time operation data of the wide-load runner in real time; Real-time monitor the corrected flow rate through the wide-load runner, verify whether the corrected flow rate through the wide-load runner meets the ecological flow requirements, and perform closed-loop optimization on the correction method of the flow rate through the wide-load runner according to the verification results to make it meet the ecological flow requirements.

[0030] In this embodiment, the formulated correction method for the flow rate through the wide-load runner is to adjust the guide vane opening and rotational speed of the wide-load runner to correct the flow rate through the runner.

[0031] It should be noted that by adjusting the guide vane opening and rotational speed of the wide-load runner, the flow rate through the runner can be corrected to meet the ecological flow requirements.

[0032] In one embodiment, when the flow rate through the wide-load runner does not meet the ecological flow requirements, a correction method for the flow rate through the wide-load runner is formulated, including: Obtain the flow difference between the flow rate result through the wide-load runner and the set ecological flow threshold. When the flow difference is positive, determine the adjustment method as reducing the guide vane opening and reducing the rotational speed of the runner. When the flow difference is negative, determine the adjustment method as increasing the guide vane opening and increasing the rotational speed of the runner; Based on the operating conditions of the wide-load runner, set the primary opening adjustment amplitude of the guide vane opening and the primary rotational speed adjustment amplitude of the runner speed. Adjust the wide-load runner according to the primary opening adjustment amplitude and the primary rotational speed adjustment amplitude, and obtain the current operating data after adjustment; The calculation formula for setting the primary opening adjustment amplitude of the guide vane opening is as follows: Among them, represents the primary opening adjustment amplitude, represents the historical average primary opening adjustment amplitude within a preset historical time period, represents the flow difference, represents the preset flow difference, represents the operating stability coefficient of the wide-load runner, with a value range of (0.5, 1), represents the maximum opening of the guide vane opening under safe operation, represents the minimum opening of the guide vane opening to maintain the lowest required operation, and e represents the natural constant, with a value of 2.72; The calculation formula for setting the primary rotational speed adjustment amplitude of the runner speed is as follows:

[0033] Among them, represents the primary rotational speed adjustment amplitude, represents the historical average primary rotational speed adjustment amplitude within a preset historical time period, Represents the maximum speed of the runner under safe operation, Represents the minimum speed of the runner when maintaining the minimum required operation.

[0034] In this embodiment, the greater the operation stability coefficient of the wide-load runner, the greater the adjustable range.

[0035] In this embodiment, the greater the ratio difference between the flow difference between the over-flow flow result of the wide-load runner and the set ecological flow threshold and the preset flow difference, the greater the adjustable range setting.

[0036] In this embodiment, the greater the difference between the maximum opening and the minimum opening, the greater the adjustable range setting.

[0037] In this embodiment, by adjusting according to the primary opening adjustment amplitude of the guide vane opening and the primary speed adjustment amplitude of the runner speed, fine adjustment of the opening and speed can be achieved, avoiding unstable operation of the wide-load runner or causing a large impact on the power grid.

[0038] In this embodiment, the smaller value is selected from the calculation result based on the current operation parameters and the historical average result. On the one hand, it avoids unstable operation of the wide-load runner caused by excessive adjustment, and on the other hand, it improves the adjustment accuracy.

[0039] The beneficial effects of the above design scheme are as follows: By obtaining the flow difference between the over-flow flow result of the wide-load runner and the set ecological flow threshold, when the flow difference is positive, it is determined that the adjustment method is to decrease the guide vane opening and decrease the runner speed, and when the flow difference is negative, it is determined that the adjustment method is to increase the guide vane opening and increase the runner speed, realizing the correctness of the direction adjustment of the opening and speed. Based on the operation condition of the wide-load runner, the primary opening adjustment amplitude of the guide vane opening and the primary speed adjustment amplitude of the runner speed are set, and the wide-load runner is adjusted according to the primary opening adjustment amplitude and the primary speed adjustment amplitude, and the current operation data after adjustment is obtained. By using the method of gradually fine-tuning, a smaller amount is adjusted each time, realizing the fine adjustment of the wide-load runner and improving the stability and accuracy of the adjustment.

[0040] In one embodiment, formulating a method for correcting the over-flow flow of a wide-load runner further includes: Inputting the current operation data into the over-flow flow mathematical model of the wide-load runner to obtain the current over-flow flow result of the wide-load runner; Based on the latest difference between the current over-flow flow result and the set ecological flow threshold, perform fine adjustment according to the adjustment method, the primary opening adjustment amplitude and the primary speed adjustment amplitude, and repeat the adjustment until the latest over-flow flow result meets the ecological flow requirement; When the operating state of the wide-load runner meets the ecological flow demand, obtain the current operating efficiency of the wide-load runner; Determine whether the current operating efficiency is not less than the historical operating efficiency; If so, maintain the current operating parameters for operation; Otherwise, optimize the guide vane opening and runner speed, specifically: Fine-tune the guide vane opening in the direction opposite to the previous adjustment according to the primary opening adjustment amplitude, and adaptively fine-tune the runner speed according to the primary speed adjustment amplitude based on the ecological flow demand. After cycling the above optimization method for a preset number of times, determine whether the latest operating efficiency is not less than the historical operating efficiency; If so, maintain the optimized operating parameters for operation; Otherwise, fine-tune the runner speed in the direction opposite to the previous adjustment according to the primary speed adjustment amplitude, and adaptively fine-tune the guide vane opening according to the primary opening adjustment amplitude based on the ecological flow demand; When optimizing the guide vane opening and runner speed cannot make the latest operating efficiency greater than or equal to the historical operating efficiency, determine that the operating states of the guide vane opening and runner speed do not affect the operating efficiency, and conduct a check on other operating parameters.

[0041] In this embodiment, fine-tuning the guide vane opening in the direction opposite to the previous adjustment according to the primary opening adjustment amplitude, and adaptively fine-tuning the runner speed according to the primary speed adjustment amplitude based on the ecological flow demand. After cycling the above optimization method for a preset number of times, determining whether the latest operating efficiency is not less than the historical operating efficiency and fine-tuning the runner speed in the direction opposite to the previous adjustment according to the primary speed adjustment amplitude, and adaptively fine-tuning the guide vane opening according to the primary opening adjustment amplitude based on the ecological flow demand, the order of these two adjustments can be interchanged.

[0042] In this embodiment, since the changes in the opening and speed cause changes in the operating efficiency, it is necessary to first analyze and exclude the opening and speed.

[0043] In this embodiment, adaptively fine-tune the guide vane opening according to the primary opening adjustment amplitude to ensure meeting the flow demand.

[0044] In this embodiment, the preset number of times is preset according to the actual situation to meet the verification requirements while not over-verifying, so as to avoid affecting the normal operation of the wide-load runner.

[0045] The beneficial effects of the above design solution are as follows: The current operating data is input into the mathematical model of the wide-load runner's flow-through flow rate, and the current flow-through flow rate result of the wide-load runner is obtained. Based on the latest difference between the current flow-through flow rate result and the set ecological flow rate threshold, fine-tuning is performed according to the adjustment method, the primary opening adjustment amplitude, and the primary rotational speed adjustment amplitude. The adjustment is repeated until the latest flow-through flow rate result meets the ecological flow rate requirement. By adopting a step-by-step fine-tuning method, a smaller amount is adjusted each time, achieving fine adjustment of the wide-load runner, improving the stability and accuracy of the adjustment. And when the operating state of the wide-load runner meets the ecological flow rate requirement, the current operating efficiency of the wide-load runner is obtained. If the current operating efficiency is less than the historical operating efficiency, the guide vane opening and the runner rotational speed are optimized. After setting the control adjustment for the opening or the rotational speed, the adjustment parameter of the remaining one is adaptively set, realizing the investigation of the reasons for the decrease in operating efficiency while ensuring that the wide-load runner operation meets the ecological flow rate requirement, ensuring its stable operation under the new working conditions, and the operating efficiency meets the requirements, ensuring the efficient and stable operation of the wide-load runner while meeting the ecological flow rate requirement.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for correcting the flow rate of the flow-through of a wide-load runner for ecological flow power generation, characterized in that, Including: Collect historical operation data of the wide-load runner according to the requirements of the river ecosystem, preprocess it, and then construct a mathematical model for the flow rate through the wide-load runner. Analyze the real-time operation data of the wide-load runner based on the mathematical model of the flow rate through the wide-load runner, calculate the flow rate through the wide-load runner, and determine the result of the flow rate through the wide-load runner. Analyze the result of the flow rate through the wide-load runner, correct the flow rate through the wide-load runner according to the analysis situation, adjust the real-time operation data of the wide-load runner in real time, and optimize the correction method of the flow rate through the wide-load runner in a closed loop to make it meet the ecological flow requirements.

2. The correction method for the flow rate of the wide-load runner in ecological flow power generation according to claim 1, characterized in that Collect historical operation data of the wide-load runner, including: Collect the runner diameter, number of blades, blade angle, inlet and outlet geometries, rated flow rate, and rated power of the wide-load runner to determine the design parameters of the wide-load runner. Collect the head, flow rate, rotational speed, guide vane opening, sediment content, water temperature, air pressure, and humidity during the operation of the wide-load runner to determine the operation parameters of the wide-load runner. Collect the ecological flow required for the health of the river ecosystem, determine the required ecological flow value, and analyze the flow characteristics through the wide-load runner under different loads in combination with the hydrological conditions in different seasons and periods to determine the ecological flow requirements of the wide-load runner. Determine the historical operation data of the wide-load runner according to the design parameters, operation parameters, and ecological flow requirements of the wide-load runner.

3. The correction method for the flow rate of the wide-load runner in ecological flow power generation according to claim 2, characterized in that, Preprocess the collected historical operation data of the wide-load runner, including: Clean the historical operation data of the wide-load runner to remove the noise data that is useless for correcting the flow rate through the wide-load runner in the historical operation data of the wide-load runner. Check the historical operation data of the wide-load runner, identify the duplicate values, missing values, and abnormal values in the historical operation data of the wide-load runner, remove the duplicate values in the historical operation data of the wide-load runner, and retain the unique data records. Judge whether the missing values and abnormal values in the historical operation data of the wide-load runner are useful for correcting the flow rate through the wide-load runner. If useful, fill the missing values in the historical operation data of the wide-load runner with the average value, and replace the abnormal values in the historical operation data of the wide-load runner with the median. If useless, directly delete the missing values and abnormal values in the historical operation data of the wide-load runner.

4. The method for correcting the flow rate of the wide-load runner for ecological flow power generation according to claim 3, characterized in that, Preprocessing the collected historical operation data of the wide-load runner also includes: Normalize the historical operation data of the wide-load runner to convert the historical operation data of the wide-load runner into a unified data format, remove the dimensional differences in the historical operation data of the wide-load runner, and determine the standardized historical operation data of the wide-load runner. Extract features from the historical operation data of the wide-load runner, extract the features useful for correcting the flow rate through the wide-load runner from the historical operation data of the wide-load runner, and determine the historical operation feature data of the wide-load runner.

5. The method for correcting the flow rate of the wide-load runner for ecological flow power generation according to claim 4, characterized in that, Construct a mathematical model for the flow rate through the wide-load runner, including: Divide the historical operation feature data of the wide-load runner to determine the training set and the test set. Based on machine learning technology, a training set is used to train a machine learning model, enabling the machine learning model to autonomously learn the calculation behavior of the flow rate through the wide-load runner and predict the flow rate through the wide-load runner, thereby determining a mathematical model for the flow rate through the wide-load runner based on machine learning; A test set is used to test the mathematical model for the flow rate through the wide-load runner based on machine learning, and to evaluate whether the mathematical model for the flow rate through the wide-load runner based on machine learning can achieve the expected effect; According to the test evaluation results, the parameters of the mathematical model for the flow rate through the wide-load runner based on machine learning are adjusted, and the mathematical model for the flow rate through the wide-load runner based on machine learning is continuously optimized to determine the optimal mathematical model for the flow rate through the wide-load runner.

6. The correction method for the flow rate of the wide-load runner in ecological flow power generation according to claim 5, wherein Calculating the flow rate through the wide-load runner includes: Obtaining the optimal mathematical model for the flow rate through the wide-load runner and deploying the optimal mathematical model for the flow rate through the wide-load runner in an actual flow rate correction environment for the wide-load runner; Collecting the real-time operation data of the wide-load runner and inputting the collected real-time operation data of the wide-load runner into the optimal mathematical model for the flow rate through the wide-load runner. Analyze the real-time operation data of the wide-load runner according to the optimal mathematical model for the flow rate through the wide-load runner, calculate the flow rate through the wide-load runner, and determine the result of the flow rate through the wide-load runner.

7. The method for correcting the flow rate of the wide-load runner for ecological flow power generation according to claim 6, wherein, Correcting the flow rate through the wide-load runner includes: Comparing and analyzing the result of the flow rate through the wide-load runner with the set ecological flow rate threshold to determine whether the flow rate through the wide-load runner meets the ecological flow rate requirement; When the flow rate through the wide-load runner does not meet the ecological flow rate requirement, formulating a correction method for the flow rate through the wide-load runner and applying the correction method for the flow rate through the wide-load runner to the actual ecological flow rate power generation process; Based on the formulated correction method for the flow rate through the wide-load runner, correct the flow rate through the wide-load runner and adjust the real-time operation data of the wide-load runner in real time; Monitor the corrected flow rate through the wide-load runner in real time to verify whether the corrected flow rate through the wide-load runner meets the ecological flow rate requirement, and perform closed-loop optimization on the correction method for the flow rate through the wide-load runner according to the verification result to make it meet the ecological flow rate requirement.

8. The method for correcting the flow rate of the wide-load runner for ecological flow power generation according to claim 7, characterized in that The formulated correction method for the flow rate through the wide-load runner is to adjust the guide vane opening and rotational speed of the wide-load runner to correct the flow rate through the runner.

9. The method for correcting the flow rate of the wide-load runner for ecological flow power generation according to claim 7, characterized in that, When the flow rate through the wide-load runner does not meet the ecological flow rate requirement, formulating a correction method for the flow rate through the wide-load runner includes: Obtaining the flow rate difference between the result of the flow rate through the wide-load runner and the set ecological flow rate threshold. When the flow rate difference is positive, determine that the adjustment method is to decrease the guide vane opening and decrease the rotational speed of the runner. When the flow rate difference is negative, determine that the adjustment method is to increase the guide vane opening and increase the rotational speed of the runner; Based on the operation condition of the wide-load runner, set the primary opening adjustment amplitude of the guide vane opening and the primary rotational speed adjustment amplitude of the runner rotational speed, adjust the wide-load runner according to the primary opening adjustment amplitude and the primary rotational speed adjustment amplitude, and obtain the current operation data after adjustment.

10. The method for correcting the flow rate of the wide-load runner for ecological flow power generation according to claim 9, characterized in that, Formulating the correction method for the flow rate through the wide-load runner further includes: Input the current operating data into the mathematical model of the wide-load runner's flow-through flow rate to obtain the current flow-through flow rate result of the wide-load runner; Based on the latest difference between the current flow-through flow rate result and the set ecological flow rate threshold, make fine adjustments according to the adjustment method, the first opening adjustment amplitude, and the first rotational speed adjustment amplitude, and repeat the adjustment until the latest flow-through flow rate result meets the ecological flow rate requirement; When the operating state of the wide-load runner meets the ecological flow rate requirement, obtain the current operating efficiency of the wide-load runner; Judge whether the current operating efficiency is not less than the historical operating efficiency; If so, maintain the current operating parameters for operation; Otherwise, optimize the guide vane opening and the runner rotational speed. Specifically: Fine-tune the guide vane opening by adjusting the first opening adjustment amplitude in the opposite direction to the previous adjustment, and adaptively fine-tune the runner rotational speed according to the first rotational speed adjustment amplitude based on the ecological flow rate requirement. After cycling the above optimization method for a preset number of times, judge whether the latest operating efficiency is not less than the historical operating efficiency; If so, maintain the optimized operating parameters for operation; Otherwise, fine-tune the runner rotational speed by adjusting the first rotational speed adjustment amplitude in the opposite direction to the previous adjustment, and adaptively fine-tune the guide vane opening according to the first opening adjustment amplitude based on the ecological flow rate requirement; When optimizing both the guide vane opening and the runner rotational speed cannot make the latest operating efficiency greater than or equal to the historical operating efficiency, determine that the operating states of the guide vane opening and the runner rotational speed do not affect the operating efficiency, and conduct a check of other operating parameters.

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