Unit water head measurement method and device, electronic equipment and storage medium

Abstract

The application relates to a kind of unit water head measurement method, device, electronic equipment and storage medium, the method comprises: determining initial water level head based on the first water level and the second water level of upstream and downstream;Determine the working condition loss water head corresponding to the target working condition operating parameter of unit based on the target working condition operating parameter of unit;The target working condition operating parameter of unit includes at least one of the rotating speed of the unit, opening degree;Determine the target water level head corresponding to the target working condition operating parameter based on the initial water level head and working condition loss water head.The method corrects water level head, so as to ensure that the real-time water head obtained by variable speed unit is always steady-state water head, is not affected by transient condition and other units, improves the stability of unit operation.

Description

Technical Field

[0001] This application relates to the field of water level measurement technology, and in particular to a method, device, electronic equipment and storage medium for measuring the head of a generating unit. Background Technology

[0002] In the operation and design of hydropower stations, the calculation and determination of head is a crucial step. The head measurement method for relevant generating units relies on the calculation of the water level difference between upstream and downstream. However, the method of measuring water level with a single sensor is affected by factors such as wind and water flow caused by generator power generation, resulting in large fluctuations in water level. This leads to low accuracy and reliability of water level measurement, and consequently, large errors in head calculation. Summary of the Invention

[0003] This application provides a method, apparatus, electronic device, and storage medium for measuring the head of a generating unit to solve the above-mentioned problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a method for measuring the head of a generating unit is provided, the method comprising:

[0005] The initial water level head is determined based on the first and second water levels upstream and downstream;

[0006] Based on the target operating parameters of the unit, determine the operating head loss corresponding to the target operating parameters; the target operating parameters of the unit include at least one of the unit's speed and opening degree.

[0007] Based on the initial water level head and the operating condition loss head, the target water level head corresponding to the target operating condition parameters is determined.

[0008] Optionally, determining the operating condition loss head corresponding to the target operating condition parameters based on the unit's target operating condition parameters includes:

[0009] Based on the target operating parameters of the unit and a preset mapping relationship, the associated loss head related to the target operating parameters is obtained, thereby determining the operating condition loss head.

[0010] The preset mapping relationship is used to indicate the associated head loss corresponding to each of the multiple preset operating parameters.

[0011] Optionally, the method further includes:

[0012] The differential pressure head is determined based on the static and dynamic heads upstream and downstream of the unit under the target operating conditions.

[0013] Based on the initial water level head and the differential pressure head, the actual head loss is determined;

[0014] Based on the actual head loss, the head loss corresponding to the target operating condition parameters in the preset mapping relationship is corrected to obtain the corrected head loss.

[0015] Optionally, determining the actual head loss based on the initial water level head and the differential pressure head includes:

[0016] Based on multiple differential pressure heads and multiple initial water level heads within a preset time period, multiple instantaneous head loss is determined;

[0017] Based on the statistical values ​​of the multiple instantaneous head losses, the actual head loss within the preset time period is determined.

[0018] Optionally, the step of correcting the operating condition loss head corresponding to the target operating condition parameters in the preset mapping relationship based on the actual loss head, to obtain the corrected operating condition loss head, includes:

[0019] Determine the relationship between the deviation of the actual head loss and the operating head loss and a preset deviation threshold:

[0020] If the deviation between the actual head loss and the working condition head loss is greater than or equal to a preset deviation threshold, the working condition head loss is corrected to obtain the corrected working condition head loss.

[0021] Optionally, obtaining the corrected operating condition head loss includes:

[0022] The corrected operating head loss is obtained by multiplying the correction factor by the actual head loss.

[0023] Optionally, the correction factor is determined in the following manner:

[0024] Based on the actual head loss, the operating head loss, and the target operating parameters, the adjustment parameters are determined.

[0025] Based on the adjustment parameters and the first correction coefficient, a second correction coefficient is obtained to determine the correction coefficient.

[0026] According to a second aspect of this application, embodiments of this application also provide a unit head measuring device, the device further comprising:

[0027] The first head module is used to determine the initial head based on the first and second water levels upstream and downstream.

[0028] The head loss module is used to determine the head loss corresponding to the target operating parameters of the unit based on the target operating parameters of the unit; the target operating parameters of the unit include at least one of the unit's speed and opening degree.

[0029] The second head module is used to determine the target head corresponding to the target operating parameters based on the initial head and the operating condition loss head.

[0030] According to a third aspect of this application, embodiments of this application also provide an electronic device, comprising:

[0031] A memory on which computer programs are stored;

[0032] A processor is configured to execute the computer program in the memory to implement the steps of any of the methods provided in the embodiments of this application.

[0033] According to a fourth aspect of this application, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of any of the methods provided in embodiments of this application.

[0034] Some embodiments in this specification include at least the following beneficial effects: Obtaining the initial water level head, dynamically determining the operating condition head loss based on the unit's current operating parameters (such as speed and opening degree), making the head loss calculation more closely match actual operating conditions, and combining the initial water level head and the operating condition head loss to calculate the corresponding actual water level head, providing accurate head data for optimized unit operation. This overcomes the deviation between actual available energy and design value when the operating condition head loss is a fixed value, which affects operating efficiency. By dynamically calculating the operating condition head loss, it ensures that the unit can fully utilize available energy in actual operation, improving power generation efficiency.

[0035] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0038] Figure 1 These are application scenario diagrams illustrating the unit head measurement method according to some embodiments of this specification;

[0039] Figure 2This is an exemplary flowchart of a unit head measurement method according to some embodiments of this specification;

[0040] Figure 3 This is an exemplary flowchart illustrating the modified operating condition head loss according to some embodiments of this specification;

[0041] Figure 4 This is a schematic diagram of the structure of the unit head measuring device according to some embodiments of this specification;

[0042] Figure 5 This is a schematic diagram of the structure of an electronic device according to some embodiments of this specification. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0044] To facilitate understanding of the implementation schemes provided in this application, the relevant application background of the unit head measurement method provided in this application will be explained first.

[0045] Pumped storage power stations play crucial roles in power systems, including peak shaving, valley filling, frequency regulation, phase regulation, and emergency backup. Compared to traditional constant-speed units, variable-speed pumped storage units can better adapt to changes in the power system, improving unit utilization and operational efficiency. Head is a key parameter for the operation of pumped storage units; accurate measurement and calculation of head are essential for optimizing the unit and improving power generation efficiency.

[0046] Currently, the following three traditional methods are mainly used in the field of pumped storage power station head measurement: the method based on the difference between upstream and downstream water levels minus the fixed head loss; the method based on the pressure difference between the inlet and tailwater of the spiral casing plus the dynamic head; and the method based on the simple pressure difference between the inlet and tailwater of the spiral casing. However, the method of subtracting the fixed head loss from the difference between upstream and downstream water levels usually produces large errors, making it difficult to meet the high efficiency requirements of variable speed units; the method of adding the dynamic head to the pressure difference between the inlet and tailwater of the spiral casing is prone to large fluctuations in dynamic head under transient conditions, which can easily cause instability in the regulating system and even oscillations, which is extremely detrimental to the stable operation of the unit; and the method based on the pressure difference between the inlet and tailwater of the spiral casing introduces water pressure fluctuations. In the operation mode of one pipe and multiple units, when other units adjust their loads, it is very easy to cause load fluctuations in adjacent units, which seriously affects the stable operation of the units. During the operation of variable speed pumped storage units, due to the frequent changes in unit operating conditions and the complex and variable water flow conditions, it is difficult for all relevant households to simultaneously meet the high efficiency requirements of variable speed units during steady-state operation and the stability requirements under transient operating conditions.

[0047] In view of this, some embodiments of this specification provide a method for measuring the head of a pumped storage unit. By correcting for head loss under operating conditions, this method can more accurately reflect the actual head loss of a variable-speed pumped storage unit under different operating conditions, effectively reducing measurement errors and ensuring the unit's operating efficiency.

[0048] Figure 1 This is an application scenario diagram of the unit head measurement method shown in some embodiments of this specification.

[0049] Some embodiments of this specification can be applied to various fields such as generator head measurement and monitoring. For example, the system and method of this application can be used for real-time head monitoring and adjustment. For instance, when the actual head is found to be lower than the target head, the operating conditions of the generator can be appropriately adjusted, such as reducing the guide vane opening, to ensure that the generator operates within a safe and efficient range. Furthermore, the power plant's power generation scheduling strategy can be optimized based on the target head to improve power generation efficiency.

[0050] like Figure 1 As shown, the application scenarios for the unit head measurement method can include terminal equipment.

[0051] The terminal device is used to process information and / or data from other components or external data sources (e.g., cloud data centers). Based on this data, information, and / or processing results, the terminal device can execute program instructions to perform one or more functions described in this application. For example, the terminal device can acquire data uploaded by the user terminal (e.g., traffic, stress, etc.).

[0052] In some embodiments, the terminal device may include one or more sub-processing devices (e.g., a single-chip processing device or a multi-chip processing device). As an example only, the terminal device may include a Central Processing Unit (CPU), an Application-Specific Integrated Circuit (ASIC), a Graphics Processing Unit (GPU), a Digital Signal Processor (DSP), a Field-Programmable Gate Array (FPGA), a micro-terminal device, or any combination thereof.

[0053] In some embodiments, the terminal device may connect to a network to communicate with other components (e.g., user terminals, storage devices). In some embodiments, the terminal device may be integrated into or included in other components (e.g., user terminals). For example, the terminal device may be a computing device installed in a user terminal.

[0054] In some embodiments, the application scenario may further include at least one sensor. For example, at least one sensor may include a pressure sensor for measuring the pressure in the upstream pressure steel pipe and the tailrace pipe of the volute inlet. Exemplarily, the pressure sensor may include an upstream pressure sensor, which may be installed on the pressure steel pipe upstream of the volute inlet. The specific location should be selected in an area with stable water flow, free from eddies and vibrations, avoiding installation near resistance components such as valves. The pressure sensor may also include a downstream pressure sensor, which may be installed at a predetermined location in the tailrace pipe, for example, selecting an area with stable water flow, free from eddies and vibrations as the predetermined location for the pressure sensor.

[0055] At least one sensor may also include a water level sensor for measuring the water level upstream and downstream.

[0056] For example, the water level sensor may include an upstream water level sensor and a downstream water level sensor. The upstream water level sensor and the downstream water level sensor may be installed at preset locations in the upstream and downstream water areas, respectively. For example, an area with a stable water surface and no obvious fluctuations may be selected as the preset location for the water level sensor, avoiding installation in places with rapid water flow or obstacles.

[0057] At least one sensor may also include a flow sensor for acquiring the unit's real-time flow rate. The flow sensor can be installed on the unit's inlet or outlet pipe. For example, an area with stable water flow, free from eddies and vibrations, can be selected as the installation location for the flow sensor, avoiding installation near resistance components such as valves.

[0058] In some embodiments, the terminal device is responsible for the real-time control and management of the head measurement of the entire unit. In some embodiments, a storage device may also be included for storing data, instructions, and / or any other information. For example, the storage device may store the associated head loss corresponding to each preset operating parameter, data from at least one sensor, etc.

[0059] It is important to note that the application scenarios for the unit head measurement method are provided for illustrative purposes only and are not intended to limit the scope of this specification. Those skilled in the art can make various changes and modifications based on the description in this specification. For example, the application scenarios may also include databases, information sources, etc. Furthermore, the application scenarios may be implemented on other devices to achieve similar or different functions. However, these changes and modifications will not depart from the scope of this specification.

[0060] Figure 2 This is an exemplary flowchart of a unit head measurement method according to some embodiments of this specification. In some embodiments, process 200 may be executed based on a terminal device. Figure 2 As shown, process 200 includes the following steps.

[0061] Step 210: Determine the initial water head based on the first and second water levels upstream and downstream.

[0062] The first water level refers to the current actual water level of the upstream reservoir. The second water level refers to the current actual water level of the downstream reservoir.

[0063] In some embodiments, the terminal device can communicate with upstream water level sensors, downstream water level sensors, etc., and the terminal device can acquire data from upstream water level sensors, downstream water level sensors, etc., under certain conditions (e.g., in real time, at intervals, or triggered under certain conditions) to obtain the first water level H. 上 Second water level and H 下 .

[0064] Initial water head refers to the water head without considering the head loss of the waterway system and the unit itself.

[0065] In some embodiments, the initial water head can be calculated based on the difference between the first water level and the second water level. For example, the initial water head H0 = H 上 -H 下 .

[0066] Step 220: Based on the target operating condition parameters of the unit, determine the operating condition head loss corresponding to the target operating condition parameters; the target operating condition parameters of the unit include at least one of the unit's speed and opening degree.

[0067] Target operating condition parameters refer to parameters related to the operating status of pumped storage power stations or hydropower stations.

[0068] In some instances, the target operating parameters for the unit include at least one of the current unit's speed and opening degree.

[0069] In some embodiments, the target operating condition parameters reflect the specific parameters of the unit during real-time operation. The target operating condition parameters are dynamically changing, depending on the timing of the terminal equipment executing relevant instructions, and can be adjusted according to factors such as the actual operating needs of the power plant, grid dispatch instructions, and changes in upstream and downstream water levels.

[0070] Rotational speed refers to the rotational speed of the turbine's main shaft, which can be expressed as revolutions per minute (rpm).

[0071] The degree of opening refers to the extent to which the guide vanes of a water turbine are open, and it can be expressed as a percentage (%). Guide vanes are devices in a water turbine used to regulate the flow of water into the runner.

[0072] The working condition head loss refers to the head loss value calculated in advance under ideal working conditions.

[0073] In some embodiments, the working condition head loss can be calculated based on theoretical models, empirical formulas, or standard specifications under ideal working conditions.

[0074] In some embodiments, the terminal equipment can determine the operating condition head loss based on the unit's historical data. For example, the terminal equipment can select historical head loss that is the same as or similar to the current target operating condition parameters from the historical data, and determine the average or median of the historical head loss as the operating condition head loss corresponding to the current target operating condition parameters.

[0075] Step 230: Based on the initial water level head and the operating condition loss head, determine the target water level head corresponding to the target operating condition parameters.

[0076] The target water level head is the actual usable head of the unit calculated after taking into account head loss.

[0077] In some embodiments, the target water level head corresponding to the current target operating parameters can be determined based on the difference between the initial water level head and the operating condition loss head, and used as the water level head of the unit under the current operating condition.

[0078] In some embodiments, the calculated target head can be compared with the design head: when the target head equals the design head, it means that the unit is operating under optimal conditions, achieving the highest operating efficiency and power generation; when the target head is less than the design head, it means that the unit cannot achieve the designed operating efficiency, the power generation will decrease, and the actual usable head is too low, which may lead to the unit not operating normally; when the target head is greater than the design head, the excess head will cause the turbine to have an excessively high flow rate, increasing the wear and maintenance costs of the turbine, and in extreme cases, the excess head may cause damage to the turbine.

[0079] Therefore, accurate calculation of the target water level head is crucial for ensuring that the turbine operates at the design head. By precisely calculating the actual available head, the unit's operating parameters (such as speed and opening degree) can be dynamically adjusted to make the target water level head as close as possible to the design head. This ensures that the unit operates within its high-efficiency range, avoids efficiency decline due to insufficient or excessive head, helps improve the power plant's operating efficiency and economic benefits, and ensures the safe operation of the equipment.

[0080] In some embodiments of this specification, by accurately calculating the target water head, it can be ensured that when the unit operates under the target operating parameters (such as speed, opening degree, etc.), the actual available water head matches the design water head of the unit, which helps the unit operate in the high-efficiency range and avoids the efficiency decline caused by insufficient or excessive water head; by accurately determining the target water head, it can be ensured that the unit operates under the optimal operating conditions, thereby maximizing the power generation.

[0081] In some embodiments, determining the operating condition loss head corresponding to the target operating condition parameters based on the unit's target operating condition parameters includes:

[0082] Based on the target operating parameters of the unit and the preset mapping relationship, the associated loss head related to the target operating parameters is obtained, thereby determining the operating condition loss head.

[0083] Among them, the preset mapping relationship is used to indicate the associated loss head corresponding to each of the multiple preset operating parameters.

[0084] The preset mapping relationship refers to the correlation between the unit's operating parameters and the head loss.

[0085] In some embodiments, a preset mapping relationship is established based on experimental or empirical data. This preset mapping relationship represents the associated head loss corresponding to different preset operating parameters (such as rotational speed, opening degree, etc.). For example, for a specific turbine, when the rotational speed is S1 and the opening degree is D1, the head loss is HS.

[0086] In some embodiments, the terminal device can match the same or similar preset rotational speed and preset opening degree in a preset mapping relationship based on the rotational speed and opening degree at the current time, and determine the associated loss head corresponding to the preset rotational speed and preset opening degree as the current operating condition loss head. The preset mapping relationship includes the correspondence between the combination of preset rotational speed and preset opening degree and the associated loss head, which can be determined based on prior knowledge or historical data.

[0087] In some embodiments of this specification, by using target operating condition parameters and preset mapping relationships, the actual operating condition head loss can be quickly and efficiently determined, which helps to improve the operating efficiency and management level of hydropower stations, while ensuring the safe operation of equipment.

[0088] Figure 3 This is an exemplary flowchart illustrating the modified operating condition head loss according to some embodiments of this specification. In some embodiments, process 300 may be executed based on a terminal device. Figure 3 As shown, process 300 includes the following steps.

[0089] In some embodiments, the method further includes:

[0090] Step 310: Determine the differential pressure head based on the static and dynamic heads upstream and downstream of the unit's operating parameters under the target operating condition.

[0091] Step 320: Determine the actual head loss based on the initial water level head and pressure difference head;

[0092] Step 330: Based on the actual head loss, correct the head loss corresponding to the target operating condition parameters in the preset mapping relationship to obtain the corrected head loss.

[0093] Static head refers to the head corresponding to the difference in water level between upstream and downstream when the water flow is static. Static head reflects the potential energy difference of a body of water when it is at rest and is used to calculate the theoretical head of a hydroelectric power station.

[0094] Dynamic head refers to the head generated by the velocity of water flow during its movement. For example, dynamic head can include kinetic head (velocity head) and pressure head, reflecting the energy of the flow during its motion.

[0095] Actual head loss refers to the head lost during the flow of water from upstream to downstream due to frictional and local resistance.

[0096] In some embodiments, the pressure can be based on the first pressure P of the upstream and downstream. 上 Second pressure P 下 Determine the static head. For example, the static head H... p =P 上 / (ρ 上 g)-P 下 / (ρ 下 g), where ρ 上 It is the upstream fluid density, ρ 下 ρ is the downstream fluid density, and g is the acceleration due to gravity.

[0097] In some embodiments, the terminal device can be communicatively connected to upstream pressure sensors, downstream pressure sensors, etc., and the terminal device can acquire data from upstream pressure sensors, downstream pressure sensors, etc., under certain conditions (e.g., in real time, at intervals, or triggered under certain conditions) to obtain a first pressure P. 上 Second pressure P 下 .

[0098] In some embodiments, the dynamic head of the unit under target operating conditions can be obtained based on the upstream and downstream flow velocities. For example, H... d =v1 2 / (2g)-v2 2 / (2g), where v1 and v2 are the upstream and downstream flow rates, respectively.

[0099] In some embodiments, the flow velocity can be calculated from the flow rate Q and the cross-sectional area of ​​the water passage, i.e. Among them, A 上 A represents the cross-sectional area of ​​the upstream water passage. 下 This indicates the cross-sectional area of ​​the downstream water passage.

[0100] In some embodiments, the differential pressure head H N =H p +H d .

[0101] It should be noted that the stable operation of the variable speed turbine depends on the stability of the head signal. To avoid fluctuations in the optimal operating point caused by the head signal, which could lead to unit fluctuations, especially during transient processes, the actual head signal is a slow variable, while the differential pressure head is more susceptible to transient conditions and the influence of adjacent units. Therefore, the water level head is used as the basis for calculating the target water level head. Considering the consistency between the actual unit and model experimental data, and to improve the operating efficiency of the variable speed turbine, the steady-state dynamic head cannot be completely ignored. A distinction is made between the steady-state dynamic head Hdw and the transient dynamic head Hds. In actual calculations, only the steady-state dynamic head (i.e., differential pressure head) is considered; the transient dynamic head has no impact on head measurement. Therefore, based on the difference between the initial water level head and the differential pressure head, the operating head loss under different speeds n and opening α under steady-state conditions is determined, and the correspondence between different speeds n, different opening α, and the operating head loss is stored.

[0102] In some embodiments, Hs(n, α) = H 上 (n, α)-H下 (n, α)-H N (n, α). Where Hs(n, α) is the head loss under operating conditions corresponding to rotational speed n and opening degree α, H 上 (n, α) represents the first water level corresponding to rotational speed n and water opening α, H 下 (n, α) represents the second water level corresponding to rotational speed n and water opening α, H N (n, α) represents the differential pressure head corresponding to rotational speed n and opening degree α.

[0103] In some embodiments, the terminal device can communicate with a flow sensor or the like, and the terminal device can acquire data from the flow sensor or the like under certain conditions (e.g., in real time, at intervals, or triggered under certain conditions) to obtain the flow rate Q.

[0104] In some embodiments of this specification, the actual head loss can be used to correct the head loss corresponding to the target operating parameters in the preset mapping relationship. This head loss correction makes the corrected head loss closer to actual operating conditions, more accurately reflecting the actual head of the variable-speed pumped storage unit under different operating conditions, effectively reducing measurement errors and ensuring unit operating efficiency.

[0105] In some embodiments, determining the actual head loss based on the initial water level head and differential pressure head includes:

[0106] Based on multiple differential pressure heads and multiple initial water level heads within a preset time period, multiple instantaneous head loss is determined;

[0107] Based on the statistical values ​​of multiple instantaneous head loss, the actual head loss within a preset time period is determined.

[0108] The preset time period refers to a predefined range of time. For example, the preset time period could be 1 second, 2 seconds, etc.

[0109] Instantaneous head loss refers to the head loss at a specific moment.

[0110] Multiple differential pressure heads refer to the differential pressure heads at multiple time points within a preset time period.

[0111] Multiple initial water level heads refer to the initial water level heads at multiple time points within a preset time period.

[0112] In some embodiments, the actual head loss within a preset time period can be determined by statistical analysis of multiple instantaneous head loss values. For example, the statistical value can be the average, median, or maximum value of multiple instantaneous head loss values.

[0113] In some embodiments, the instantaneous head loss at a certain moment can be determined based on the difference between the initial water level head and the differential pressure head at a certain moment, and the relationship between the instantaneous head loss at that moment and the operating head loss can be determined: when the difference between the instantaneous head loss and the operating head loss is greater than or equal to a preset difference threshold, the first head and the second water level at multiple moments within a preset time period are continuously measured to obtain the initial water level head at multiple moments, and the static head and dynamic head at multiple moments within a preset time period are continuously measured to obtain the differential pressure head at multiple moments, and the instantaneous head loss at that moment is obtained based on the difference between the initial water level head and the differential pressure head at each moment.

[0114] In some embodiments of this specification, by correcting the operating head loss corresponding to the target operating parameters, the corrected operating head loss is made closer to the actual operating conditions, which helps to improve the calculation of the target water level head.

[0115] In some embodiments, based on the actual head loss, the working condition head loss corresponding to the target operating condition parameters in the preset mapping relationship is corrected to obtain the corrected working condition head loss, including:

[0116] Determine the relationship between the deviation between the actual head loss and the operating head loss and the preset deviation threshold:

[0117] If the deviation between the actual head loss and the working condition head loss is greater than or equal to the preset deviation threshold, the working condition head loss is corrected to obtain the corrected working condition head loss.

[0118] A preset deviation threshold refers to a pre-set threshold condition. It is used to monitor the deviation between the actual head loss and the head loss under operating conditions. The preset deviation threshold can be determined based on experiments or experience.

[0119] In some embodiments of this specification, by setting a preset deviation threshold, the actual operating status of the turbine can be monitored in real time to ensure that it operates within the high-efficiency range. When the deviation between the actual head loss and the operating head loss exceeds the threshold, the operating head loss is adjusted in a timely manner to optimize the unit's operating parameters.

[0120] In some embodiments, obtaining the corrected operating condition head loss includes:

[0121] The corrected operating head loss is obtained by multiplying the correction factor by the actual head loss.

[0122] The correction factor is a factor used to adjust the actual head loss, which can be determined based on actual operating data, experience, or a specific algorithm.

[0123] In some embodiments, the correction factor can be a preset fixed value or a dynamically adjusted value. For example, a fixed correction factor can be determined based on historical data or experience, or the correction factor can be dynamically calculated based on real-time data or a specific algorithm.

[0124] In some embodiments, to avoid introducing interfering data, the correction coefficient can be less than 1. For example, Hs'(n,α)=K*Hs N (n,α), where Hs'(n,α) is the corrected working condition head loss, Hs N (n,α) represents the actual head loss, and K is the correction factor.

[0125] In some embodiments, the correction factor can be a preset value or a correction factor corresponding to the previous target operating condition parameters. The correction factor can be set based on historical data or experience.

[0126] In some embodiments of this specification, the modified operating condition loss head can be used to more accurately predict the target water level head, thereby controlling the operating efficiency of the hydropower station, optimizing the operating parameters of the unit, and helping to further improve power generation efficiency and reduce equipment wear.

[0127] In some embodiments, the correction factor is determined in the following manner:

[0128] The correction coefficient is determined based on the actual head loss, the head loss under operating conditions, and the target operating parameters.

[0129] In some embodiments, the deviation between the actual head loss and the operating head loss can be calculated. Based on the deviation and the target operating parameters, the historical correction coefficients corresponding to the same or similar historical deviations and historical operating parameters can be determined. Based on the historical correction coefficients, the correction coefficients at the current moment can be determined.

[0130] In some embodiments, a deviation correlation graph can be constructed, where each node represents a specific operating state of a unit. A specific operating state may include actual head loss, operating condition head loss, and specific operating parameters (such as speed and opening degree). The weights of the edges in the deviation correlation graph reflect the transition probabilities between operating states. For example, the edge weights can represent the similarity or transition frequency between two specific operating states.

[0131] In some embodiments, the deviation correlation map can be processed based on a graph neural network to output the correction parameters corresponding to the feature vector of the target node. The target node refers to the node corresponding to the operating parameters of the target working condition.

[0132] In some embodiments, the feature vector of each node can be aggregated and updated based on a graph neural network. The updated feature vector reflects the comprehensive information of the node in the deviation association graph, including the node's own features and information about its neighboring nodes.

[0133] In some embodiments, the correction coefficient λt = Softmax(GNN(Ft)) * Wm, where: Ft is the feature vector of a certain node, including the actual head loss, the head loss under the operating condition, and the operating parameters under the target operating condition. Softmax(GNN(Ft)) is the adjustment parameter, and Wm is the correction coefficient for the same or similar operating conditions, representing the experience of historical corrections.

[0134] In some embodiments, the output of a graph neural network can be converted into probabilities using the Softmax function, ensuring that the value of Softmax(GNN(Ft)) is within a reasonable range (e.g., between 0 and 1).

[0135] In some embodiments of this specification, the output of the graph neural network can dynamically reflect the similarity between the current operating condition and the historical operating condition, thereby dynamically adjusting the correction coefficient to adapt to different operating conditions.

[0136] It should be noted that the above description of the process is for illustrative purposes only and does not limit the scope of this specification. Those skilled in the art can make various modifications and changes to the process under the guidance of this specification. However, these modifications and changes remain within the scope of this specification.

[0137] Figure 4 This is a structural schematic diagram of the unit head measuring device according to some embodiments of this specification.

[0138] like Figure 4 As shown in the diagram, one or more embodiments of this specification also provide a structural schematic of a unit head measuring device. This unit head measuring device may include:

[0139] The first head module 401 is used to determine the initial head based on the first and second water levels upstream and downstream.

[0140] The head loss module 402 is used to determine the head loss corresponding to the target operating parameters based on the target operating parameters of the unit; the target operating parameters of the unit include at least one of the unit's speed and opening degree.

[0141] The second head module 403 is used to determine the target head corresponding to the target operating parameters based on the initial head and the loss head under the operating conditions.

[0142] The first head module 401, the loss head module 402, and the second head module 403 can be used to execute the embodiments corresponding to the above-mentioned unit head measurement method. For the specific implementation methods of these modules and more details, please refer to the corresponding method section, which will not be elaborated here.

[0143] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0144] Figure 5 This is a schematic diagram of the structure of an electronic device according to some embodiments of this specification.

[0145] This application embodiment also provides an electronic device 500, which may include components such as a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, a power supply 503, and an input unit 504. Those skilled in the art will understand that... Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0146] The processor 501 is the head measurement center of the unit. It connects to various parts of the electronic equipment via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 502, and by calling data stored in the memory 502, it performs various functions and processes data, thereby providing overall monitoring of the electronic equipment. It is understood that the processor 501 communicates with the controller via signal transmission. Optionally, the processor 501 may include one or more processing cores; preferably, the processor 501 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and applications, while the modem processor primarily handles wireless communication. It is understood that the modem processor may also not be integrated into the processor 501.

[0147] The memory 502 can be used to store software programs and modules. The processor 501 executes various functional applications and data processing by running the software programs and modules stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.

[0148] In some embodiments of this application, the unit head measuring device can be implemented as a computer program, and the computer program can be implemented in, for example... Figure 5 The device operates on the electronic equipment shown. The memory of the electronic equipment can store various program modules that make up the unit head measuring device. The computer program composed of these program modules causes the processor to execute the steps in the unit head measuring methods of the various embodiments of this application described in this specification.

[0149] The electronic device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with external electronic devices via a network connection. When the computer program is executed by the processor, it implements a method for measuring the head of a generator unit.

[0150] The electronic device also includes a power supply 503 that supplies power to various components. Preferably, the power supply 503 can be logically connected to the processor 501 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 503 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0151] The electronic device may also include an input unit 504, which can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0152] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 501 in the electronic device loads the executable files corresponding to the processes of one or more application programs into the memory 502 according to computer instructions, and the processor 501 runs the application programs stored in the memory 502 to realize various functions, such as the unit head measurement method of various embodiments of this application described in this specification.

[0153] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0154] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0155] It should be noted that, Figure 5 This is merely one implementation of the electronic device 500 provided in this application embodiment. In actual applications, the electronic device 500 may include more or fewer components, which is not limited here.

[0156] It should be understood that the various solutions in the embodiments of this application can be used in a reasonable combination, and the explanations or descriptions of the various terms appearing in the embodiments can be referenced or explained to each other in the various embodiments, without limitation.

[0157] Based on the above embodiments and the same concept, this application also provides a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to perform the method provided in the above embodiments.

[0158] Based on the above embodiments and the same concept, this application also provides a computer program product, which includes a computer program that, when run on a computer, causes the computer to execute the method provided in the above embodiments.

[0159] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0160] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0161] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although the descriptions of each embodiment in this application have different focuses, and the parts not described in detail in a certain embodiment can be referred to the relevant embodiments of other embodiments, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A method for measuring the head of a generating unit, characterized in that, The method includes: The initial water level head is determined based on the first and second water levels upstream and downstream; Based on the target operating parameters of the unit, determine the operating head loss corresponding to the target operating parameters; the target operating parameters of the unit include at least one of the unit's speed and opening degree. Based on the initial water level head and the operating condition loss head, determine the target water level head corresponding to the target operating condition parameters; The method further includes: The differential pressure head is determined based on the static and dynamic heads upstream and downstream of the unit under the target operating conditions. Based on the initial water level head and the differential pressure head, the actual head loss is determined; Based on the actual head loss, the working condition head loss corresponding to the target working condition operating parameters in the preset mapping relationship is corrected to obtain the corrected working condition head loss. The determination of the actual head loss based on the initial water level head and the differential pressure head includes: Based on multiple differential pressure heads and multiple initial water level heads within a preset time period, multiple instantaneous head loss is determined; Based on the statistical values ​​of the multiple instantaneous head loss, the actual head loss within the preset time period is determined; The statistical values ​​include at least one of the average, median, and maximum values ​​of multiple instantaneous head loss.

2. The method according to claim 1, characterized in that, The determination of the operating condition loss head corresponding to the target operating condition parameters based on the unit's target operating condition parameters includes: Based on the target operating parameters of the unit and a preset mapping relationship, the associated loss head related to the target operating parameters is obtained, thereby determining the operating condition loss head. The preset mapping relationship is used to indicate the associated head loss corresponding to each of the multiple preset operating parameters.

3. The method according to claim 1, characterized in that, The step of correcting the operating condition loss head corresponding to the target operating condition parameters in the preset mapping relationship based on the actual loss head, to obtain the corrected operating condition loss head, includes: Determine the relationship between the deviation between the actual head loss and the operating head loss and a preset deviation threshold: If the deviation between the actual head loss and the working condition head loss is greater than or equal to a preset deviation threshold, the working condition head loss is corrected to obtain the corrected working condition head loss.

4. The method according to claim 3, characterized in that, The process of obtaining the corrected working condition loss head includes: The corrected operating head loss is obtained by multiplying the correction factor by the actual head loss.

5. The method according to claim 4, characterized in that, The correction factor is determined in the following manner: The correction coefficient is determined based on the actual head loss, the operating head loss, and the target operating parameters.

6. A unit head measuring device, characterized in that, The device further includes: The first head module is used to determine the initial head based on the first and second water levels upstream and downstream. The head loss module is used to determine the head loss corresponding to the target operating parameters of the unit based on the target operating parameters of the unit; the target operating parameters of the unit include at least one of the unit's speed and opening degree. The second head module is used to determine the target head corresponding to the target operating parameters based on the initial head and the operating condition loss head. The device is also used for: The differential pressure head is determined based on the static and dynamic heads upstream and downstream of the unit under the target operating conditions. Based on the initial water level head and the differential pressure head, the actual head loss is determined; Based on the actual head loss, the working condition head loss corresponding to the target working condition operating parameters in the preset mapping relationship is corrected to obtain the corrected working condition head loss. The determination of the actual head loss based on the initial water level head and the differential pressure head includes: Based on multiple differential pressure heads and multiple initial water level heads within a preset time period, multiple instantaneous head loss is determined; Based on the statistical values ​​of the multiple instantaneous head loss, the actual head loss within the preset time period is determined; The statistical values ​​include at least one of the average, median, and maximum values ​​of multiple instantaneous head loss.

7. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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