A method and system for intelligent water conservancy project data monitoring

Abstract

The present invention relates to the technical field of water conservancy project data monitoring, and discloses an intelligent water conservancy project data monitoring method and system, comprising: executing an idle electric energy prediction strategy to predict the electric energy value of the next monitoring period, recorded as dispatched electric energy; executing a dual-threshold electric energy classification strategy to calculate two thresholds for classifying idle electric energy values; if the dispatched electric energy #imgabs0# first threshold and the dispatched electric energy #imgabs1# second threshold: calculating the lower limit pumping time for a lower water outlet to pump a unit volume of water in a lower reservoir to an upper reservoir according to a maximum flow; if the pumping lower limit time is #imgabs2# the duration of the monitoring period, then using the lower water outlet to assist in dispatching electric energy to pump water in the lower reservoir to the upper reservoir; if the pumping lower limit time is #imgabs3# the duration of the monitoring period; executing a coordinated pumping energy efficiency optimization strategy to calculate the energy consumption of pumping schemes for a single water outlet and multiple water outlets, selecting the scheme with the smallest electric energy loss, and reducing the idle low-value electric energy loss in the smart grid.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy project data monitoring, and in particular to an intelligent water conservancy project data monitoring method and system. Background Art

[0002] With the integration of renewable energy sources such as wind and solar power into power systems, grid power volatility is increasing, and surplus power often occurs during certain periods. Connecting pumped-storage power plants to smart grids can utilize idle power during these peak periods to drive pumps, pumping water from the lower reservoir to the upper reservoir. This achieves the dual benefits of "peak shaving" and energy time shifting, improving the flexibility and security of grid operations.

[0003] Existing solutions often rely on simple electricity price forecasts or grid load strategies when scheduling pumping, failing to scientifically assess the minimum effective energy threshold required for each pumping operation. Especially in scenarios where the total amount of idle power is small or fluctuates frequently, the system often simply discards this low energy, assuming it is insufficient to drive effective pumping, resulting in a significant waste of potentially usable resources. Furthermore, these solutions only consider current electricity prices or grid loads, failing to comprehensively assess the minimum energy threshold required for pumping. Furthermore, they fail to fully utilize the potential energy contributions of different hydraulic paths (such as the upper and lower outlets). This can lead to the system starting pumps inefficiently or even with insufficient power, resulting in unnecessary energy consumption. Furthermore, some systems fail to leverage the water level linkage mechanism between the lower reservoir and the natural lake to dynamically adjust the water level, thus failing to proactively release potential energy resources that could assist in pumping. Existing technologies lack a scientifically quantified mechanism for determining "minimum auxiliary power" and "minimum pumpable power," leading to the waste of some idle power resources and hindering refined scheduling and control.

[0004] This proposal proposes an intelligent water conservancy project data monitoring method and system, which calculates the releasable potential energy of the lower reservoir by combining the geometric height difference of the upper, middle and lower outlets, and evaluates its auxiliary capacity in different scenarios through the potential energy conversion efficiency. Summary of the Invention

[0005] The present invention provides an intelligent water conservancy project data monitoring method and system, which are used to promote the solution of the problems mentioned in the above background technology.

[0006] The present invention provides the following technical solution: a method for monitoring data of an intelligent water conservancy project, comprising:

[0007] Connect the pumped storage power station to the smart grid and use the idle electricity in the smart grid to drive the water pump to pump water from the lower reservoir to the upper reservoir. Specifically:

[0008] Set monitoring intervals and divide a day into multiple monitoring periods based on the monitoring intervals;

[0009] Execute the idle power prediction strategy to predict the power value of the next monitoring period, which is recorded as the dispatched power;

[0010] There are three water outlets on the side wall of the lower reservoir, which are evenly spaced in the vertical direction and named as upper outlet, middle outlet and lower outlet from high to low;

[0011] Execute a dual-threshold power classification strategy, calculate two thresholds for classifying idle power values, and name the two thresholds as the first threshold and the second threshold from largest to smallest;

[0012] If the dispatching power At the first threshold, dispatching electric energy drives the water pump to pump water from the lower reservoir to the upper reservoir;

[0013] If the dispatching power The first threshold and dispatching electric energy Second threshold:

[0014] Limit each outlet to have the same maximum flow rate;

[0015] Calculate the minimum pumping time required to pump a unit volume of water from the lower reservoir to the upper reservoir at the maximum flow rate at the lower outlet;

[0016] If the pumping limit is long When the monitoring period is long, the lower outlet is used alone to assist in dispatching electricity to pump water from the lower reservoir to the upper reservoir;

[0017] If the pumping limit is long The duration of the monitoring period;

[0018] Implement the optimal strategy for coordinated pumping energy efficiency, calculate the energy consumption of single-outlet and multi-outlet pumping schemes, and select the scheme with the least power loss;

[0019] If the electricity is dispatched At the second threshold, the pipeline drainage strategy is executed, and the dispatched electricity is used to drain the water retained in the pumping pipeline.

[0020] Optionally, executing the idle power prediction strategy to predict the power value of the next monitoring period includes:

[0021] Obtain the historical electricity consumption and power supply records of the smart grid in the past 7 days;

[0022] For the next monitoring period:

[0023] Obtain all historical electricity consumption values during the monitoring period in the historical electricity consumption records, calculate the average of the historical electricity consumption values, and use the result as the average electricity consumption value;

[0024] Obtain all historical power supply values during the monitoring period in the historical power supply records, calculate the average of the historical power supply values, and use the result as the average power supply value;

[0025] Calculate the average power supply value minus the average power consumption value, and record it as the power consumption difference;

[0026] When the power difference is greater than 0, the power difference is the predicted idle power value for the next monitoring period.

[0027] Optionally, executing a dual-threshold power classification strategy to calculate two thresholds for classifying idle power values includes:

[0028] Get the water levels of the upper and lower reservoirs during the current monitoring period;

[0029] Calculate the water level of the upper reservoir minus the water level of the lower reservoir to get the required height of the water in the lower reservoir ;

[0030] Set pumping efficiency , represents the conversion efficiency of idle electrical energy into potential energy, ;

[0031] Among them, the pumping efficiency The experimental results are as follows:

[0032] Input a unit value of electrical energy to the pump ;

[0033] Use flow meters to measure the volume of water transported from the lower reservoir to the upper reservoir ;

[0034] calculate ,in, is the density of water, is the acceleration due to gravity, is the pumping efficiency;

[0035] Calculate the electrical energy required to transport a unit volume of water from the lower reservoir to the upper reservoir :

[0036] The calculation formula is: ,in, is the unit volume of water, It represents the potential energy contained in each cubic meter of water;

[0037] Will As the first threshold, the first threshold is the minimum idle electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir.

[0038] Optionally, the executing a dual-threshold power classification strategy to calculate two thresholds for classifying idle power values further includes:

[0039] Get the water level of the lower outlet;

[0040] Calculate the water level of the lower reservoir minus the water level of the lower outlet, and record the result as ;

[0041] Get the water storage volume corresponding to the current water level of the lower reservoir in the reservoir capacity table ;

[0042] Obtain the water storage volume at the lower outlet water level in the storage capacity table ;

[0043] calculate , where the unit volume is Theoretical value, unit volume is less than or equal to ;

[0044] when Calculate the potential energy used to assist pumping when :

[0045] Set the conversion efficiency of potential energy into electrical energy , ;

[0046] The calculation formula is: ;

[0047] calculate ,in, is the second threshold;

[0048] The second threshold is the minimum idle electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir with the assistance of the lower reservoir.

[0049] Optionally, if the pumping lower limit time is When the monitoring period is long, the lower outlet auxiliary dispatching power is used alone to pump water from the lower reservoir to the upper reservoir, including:

[0050] The calculation formula for the lower limit of pumping time is:

[0051] Calculate the unit volume divided by the maximum flow rate and record the result as the lower limit of pumping time;

[0052] Calculating electrical energy Subtract the dispatched electric energy and record the result as the first electric energy , wherein the first electric energy is the electric energy that is lacking in dispatching electric energy to transport a unit volume of water from the lower reservoir to the upper reservoir;

[0053] calculate ,in, is the first volume;

[0054] Calculate the first volume and divide it by the duration of the monitoring period, and record the result as the first flow rate;

[0055] The lower water outlet is controlled to discharge water according to the first flow rate, and the duration of the drainage is the duration of the monitoring period.

[0056] Optionally, executing the coordinated pumping energy efficiency optimization strategy and calculating the energy consumption of the single outlet and multiple outlet pumping schemes include:

[0057] When using the lower outlet pumping solution alone for pumping:

[0058] Calculate the maximum flow rate multiplied by the duration of the monitoring period and record the result as the second volume ;

[0059] Measure the water level in the reservoir before and after the second volume of water is reduced, and calculate the difference between the water levels before and after ;

[0060] calculate ,in, is the second potential energy;

[0061] calculate , is the second electrical energy;

[0062] Calculate the dispatching electric energy - the second electric energy as the energy consumption of a single water outlet;

[0063] When combining pumping schemes from multiple outlets for pumping:

[0064] Set the combination ratio of upper outlet, middle outlet and lower outlet to be , and ;

[0065] Calculate the combined ratio of the upper outlet, middle outlet and lower outlet and multiply it by the maximum flow rate to obtain the actual pumping flow rate of the upper outlet, middle outlet and lower outlet. , , ;

[0066] For any water outlet;

[0067] Calculate the water level of the reservoir during the current monitoring period minus the water level at the outlet, and record it as the relative height;

[0068] If the relative height is less than or equal to 0, the relative height of the outlet is recorded as 0;

[0069] Get the actual pumping flow at the outlet ;

[0070] Measure the water outlet The change in relative height ;

[0071] Calculate the potential energy of the outlet , The duration of the monitoring period;

[0072] Get the potential energy of the upper outlet, middle outlet and lower outlet, calculate the sum, and the result is the total potential energy .

[0073] Optionally, executing the coordinated pumping energy efficiency optimization strategy and calculating the energy consumption of the pumping schemes of a single outlet and multiple outlets further includes:

[0074] calculate , the result is the potential energy lost;

[0075] calculate ,in, is the third electrical energy;

[0076] Calculate the dispatching power - the third power, as the power loss of the pumping scheme for transporting water from the lower outlet reservoir to the upper reservoir by combining the lower outlet ;

[0077] calculate ,result Energy consumption as a pumping scheme with multiple outlets.

[0078] Optionally, if the electric energy is dispatched At the second threshold, the pipeline drainage strategy is implemented, using dispatched electricity to drain the water trapped in the pumping pipeline, including:

[0079] Use hydraulic valves to block the connection between the pumping pipe and the lower reservoir;

[0080] An air valve is provided between the pumping pipe and the upper reservoir to automatically introduce air into the pumping pipe;

[0081] The dispatched electric energy is used to drive the water pump to transport the water retained in the pumping pipeline to the upper reservoir.

[0082] A system for intelligent water conservancy project data monitoring method, comprising:

[0083] The power monitoring and prediction module is used to collect the power consumption and supply records of the smart grid in real time and predict the idle power value in the future monitoring period;

[0084] The reservoir water level monitoring module is used to monitor the real-time water level information of the upper and lower reservoirs and collect water level data from three outlets at different heights on the side wall of the lower reservoir;

[0085] The dual-threshold power classification module is used to calculate two power thresholds based on the water level difference and pumping efficiency, classify the predicted idle power, and determine the appropriate pumping strategy for dispatching power;

[0086] The pumping control module is used to control the start and stop of the water pump according to the scheduling power and flow requirements, and adjust the pumping flow and pumping time of a single or a combination of multiple outlets;

[0087] The flow and duration calculation module is used to calculate the actual pumping flow of each outlet, evaluate the lower limit of the pumping time per unit volume of water, and dynamically adjust the pumping flow and duration based on the monitoring period;

[0088] The pipeline drainage module is used to control the hydraulic valve and air valve, and use the dispatching electric energy to drive the water pump to effectively drain the retained water in the pipeline;

[0089] The data management and scheduling module is used to divide the monitoring time period, manage and store monitoring data, and coordinate the data interaction and control instruction execution of each module.

[0090] The present invention has the following beneficial effects:

[0091] 1. This intelligent water conservancy project data monitoring method obtains the power consumption and power supply records of the smart grid over the past seven days and constructs a real-time updated power reserve prediction model to determine in advance whether the conditions for scheduling pumping are met, thereby improving the automatic adjustment capabilities of the entire intelligent water conservancy project system. The division of monitoring time periods can be dynamically adjusted according to demand. When power fluctuations are large, the monitoring interval can be reduced to increase processing capacity. When power fluctuations are small, the monitoring interval can be increased to reduce the number of processing times and improve processing efficiency.

[0092] 2. This intelligent water conservancy project data monitoring method uses the pumping efficiency measured by experimental data, combined with the water level difference between the upper and lower reservoirs, to calculate the minimum idle electricity required to pump a unit volume of water to the upper reservoir (i.e., the first threshold), forming a clear demarcation standard. When the idle electricity is greater than the first threshold, it means that the idle electricity can be used for independent pumping operations, and then the electricity is stored in the upper reservoir. There is no need to use the potential energy of the lower reservoir to assist pumping, which reduces complex operation steps and improves energy conversion efficiency.

[0093] 3. In order to calculate the second threshold, the intelligent water conservancy project data monitoring method temporarily uses the water storage volume corresponding to the current water level of the lower reservoir as an approximate value of the theoretical auxiliary pumping volume, thereby calculating the auxiliary potential energy, and then converting the potential energy into electrical energy according to the conversion efficiency. Finally, the minimum threshold of the dispatching electric energy required to complete pumping with the cooperation of the natural water potential is calculated, and it is believed that when the dispatching electric energy is greater than or equal to the second threshold, the potential energy of the lower reservoir can be used to assist the dispatching electric energy for pumping; since the dispatching electric energy alone is not enough to pump the water in the lower reservoir to the upper reservoir, the natural potential energy of the lower outlet is used to assist water delivery, and the dispatching electric energy that should have been discarded is stored to improve energy utilization efficiency. In actual operation, the auxiliary pumping process is usually close to the water volume of the water storage volume of the lower reservoir, that is, the unit volume is the theoretical value of the water storage volume of the lower reservoir.

[0094] 4. In this intelligent water conservancy project data monitoring method, the potential energy of the water in the lower reservoir can only be maximized through the lower outlet. Because in this solution, potential energy can replace electric energy for pumping, saving potential energy is saving electric energy. At this time, priority is given to calculating the lower limit of pumping time required for drainage at the lower outlet according to the maximum flow rate. If the lower limit of pumping time is less than the duration of the monitoring period, it means that only the lower outlet can be used to assist in dispatching electric energy for pumping, which minimizes the waste of dispatching electric energy and potential energy. The purpose of assistance can be achieved by simply calculating the actual flow rate of the lower outlet according to the duration of the monitoring period.

[0095] 5. In this intelligent water conservancy project data monitoring method, when the pumping lower limit time is longer than the monitoring time, it means that if you want to maximize the use of potential energy, it will inevitably lead to the loss of part of the dispatching power during the monitoring period. Because the lost dispatching power has no auxiliary power to match it, part of the potential energy must be generated outside the monitoring period. At this time, the water in the lower reservoir is not completely discharged, and the water per unit volume is not completely discharged. Therefore, the power is quantified according to the ratio of the second volume to the water storage volume in the lower reservoir. If you want to utilize the potential energy in the lower reservoir during the monitoring period, you must open multiple outlets. Opening multiple outlets will lead to the loss of potential energy. For example, the upper outlet will discharge the water that should be discharged from the lower outlet at a higher height, reducing the potential energy of the water. Therefore, the potential energy is reduced, and the dispatching power that matches the potential energy is reduced, which will inevitably lead to part of the dispatching power being unable to match the corresponding potential energy and being wasted. Therefore, energy consumption is divided into the loss of potential energy and the loss of dispatching power. The two schemes are compared, and the scheme with the lowest energy consumption is selected as the final scheme to reduce energy consumption.

[0096] 6. This intelligent water conservancy project data monitoring method blocks the hydraulic valves between the pipeline and the lower reservoir, introduces air through air valves to create a pressure differential, and uses limited dispatchable electrical energy to drive a water pump to transport retained water in the pipeline to the upper reservoir. This prevents pipeline corrosion, operational blockages, and startup failures caused by accumulated water. This method significantly ensures pipeline safety and water hygiene, while effectively utilizing limited electrical energy and avoiding resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] Figure 1 Schematic diagram of the process of the present invention.

[0098] Figure 2 Schematic diagram of the system module of the present invention. DETAILED DESCRIPTION

[0099] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0100] Example 1, refer to Figure 1 , an intelligent water conservancy project data monitoring method, comprising:

[0101] Connect the pumped storage power station to the smart grid and use the idle electricity in the smart grid to drive the water pump to pump water from the lower reservoir to the upper reservoir. Specifically:

[0102] Connecting the pumped-storage power station to the smart grid and using the periodic idle electricity in the smart grid to drive the water pump to pump water from the lower reservoir to the upper reservoir can, on the one hand, absorb excess electricity during periods of low electricity consumption, alleviate the peak-valley load fluctuations of the power grid, and promote the coordinated scheduling of new energy power generation (such as wind power and photovoltaic power) and traditional power sources; on the other hand, by converting electrical energy into water level potential energy and storing it in the upper reservoir, it can be converted into electrical energy output later according to peak electricity demand, thus realizing the temporal and spatial transfer and flexible release of energy.

[0103] Set monitoring intervals and divide a day into multiple monitoring periods based on the monitoring intervals;

[0104] Execute the idle power prediction strategy to predict the power value of the next monitoring period, which is recorded as the dispatched power;

[0105] In this embodiment, the most recent seven days of historical data are collected because the output of renewable energy sources in the power grid fluctuates significantly and the load cannot respond in real time. This inevitably leads to short periods of idle power in actual operation of smart grids. By predicting the idle power values for each monitoring period in advance, energy storage equipment can be pre-scheduled, improving energy utilization efficiency.

[0106] There are three water outlets on the side wall of the lower reservoir, which are evenly spaced in the vertical direction and named as upper outlet, middle outlet and lower outlet from high to low;

[0107] In this embodiment, the water level of the upper reservoir is 160 meters, the water level of the lower reservoir is 100 meters, and the water level of the lower outlet is 90 meters;

[0108] The potential energy to electrical energy efficiency δ is artificially set to 0.6;

[0109] Monitoring period duration: 6 minutes;

[0110] Unit volume: 10 cubic meters;

[0111] The water storage volume in the lower reservoir is 10 cubic meters;

[0112] Execute a dual-threshold power classification strategy, calculate two thresholds for classifying idle power values, and name the two thresholds as the first threshold and the second threshold from largest to smallest;

[0113] Get the water levels of the upper and lower reservoirs during the current monitoring period;

[0114] Calculate the water level of the upper reservoir minus the water level of the lower reservoir to get the required height of the water in the lower reservoir Meters, used to calculate the added gravitational potential energy;

[0115] Set pumping efficiency , represents the conversion efficiency of idle electrical energy into potential energy, ;

[0116] Among them, the pumping efficiency It is obtained from experiments. In this embodiment, the pumping efficiency η is measured to be 0.8;

[0117] Calculate the electrical energy required to transport a unit volume of water from the lower reservoir to the upper reservoir :

[0118] The calculation formula is: ,in, is the unit volume of water, Indicates the potential energy contained in each cubic meter of water, the density of water , the acceleration due to gravity ;

[0119] Get the water level of the lower outlet;

[0120] Calculate the water level of the lower reservoir minus the water level of the lower outlet, and record the result as ;

[0121] Get the water storage volume corresponding to the current water level of the lower reservoir in the reservoir capacity table ;

[0122] Obtain the water storage volume at the lower outlet water level in the storage capacity table ;

[0123] In this embodiment, the water storage volume information corresponding to the water level can be given by a storage capacity curve or storage capacity table obtained during the design phase of the reservoir;

[0124] calculate , where the unit volume is equal to ;

[0125] when Calculate the potential energy used to assist pumping when :

[0126] Set the conversion efficiency of potential energy into electrical energy , ;

[0127] The calculation formula is:

[0128] ;

[0129] Used in engineering The reason for calculating the potential energy of water storage is that it is assumed that all water flows back from the lower outlet of the lower reservoir to the current water level of the lower reservoir, so the actual height of the unit volume of water is , its gravitational potential energy is approximately equal to the energy of the water pump to lift the water, and the process of pumping water from the lower reservoir is dynamic, so the theoretical center of gravity should not be used to calculate the stored energy. The advantages are:

[0130] In engineering applications, we focus more on how to efficiently pump and drain water. We often use the maximum available potential energy difference between the current water level and the outlet as the basis for estimation because it has:

[0131] Simple: No need to track changes in water level drawdown;

[0132] Directly related to energy consumption: This is exactly the lift height the pump has to overcome at this moment;

[0133] calculate ,result as the second threshold;

[0134] The second threshold is the minimum idle electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir with the assistance of the lower reservoir.

[0135] To facilitate calculation of the second threshold, this approach uses the total water volume corresponding to the current lower reservoir water level as an approximation for the auxiliary pumping volume. In practice, the auxiliary pumping process typically relies on a volume close to this volume, and the lower reservoir water level is often regulated through connections with adjacent natural lakes to achieve dynamic water level control. Therefore, this calculation method meets both theoretical requirements and practical operational requirements.

[0136] Furthermore, the volume of water in the lower reservoir changes dynamically with the water level, and the effective pumping volume during actual pumping is affected by various factors, including the water level, outlet height, and flow restrictions. Calculating potential energy directly using the entire water volume as the unit volume can easily lead to an overestimation of the available potential energy, thus affecting the accuracy and rationality of scheduling.

[0137] The rationale for prioritizing the use of the lower outlet is that prioritizing the use of the lower outlet alone to assist in dispatching electric energy for pumping is a reasonable and efficient choice. The reasons include:

[0138] 1) Maximization of potential energy utilization: The lower outlet corresponds to the lowest water level, the largest head difference, the highest potential energy released per unit volume of water, and a higher efficiency in converting it into electrical energy.

[0139] 2) Simplified control and management: The single-port pumping structure is simple, easy to operate and maintain, and reduces system complexity and control costs.

[0140] 3) Reduce potential energy loss: Avoid the problem of rapid water level drop caused by simultaneous pumping from multiple outlets and increased potential energy loss at low head outlets.

[0141] 4) Meeting duration requirements: When the pumping duration does not exceed the monitoring period, the single-port solution can effectively complete the task and ensure system stability.

[0142] Will As the first threshold, the first threshold is the minimum idle electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir.

[0143] If the electricity is dispatched At the first threshold, dispatching electric energy drives the water pump to pump water from the lower reservoir to the upper reservoir;

[0144] If the electricity is dispatched The first threshold and dispatching electric energy Second threshold:

[0145] If the pumping limit is long When the monitoring period is long, the lower outlet is used alone to assist in dispatching electricity to pump water from the lower reservoir to the upper reservoir; this indicates that water can be pumped within the monitoring period.

[0146] In this embodiment, when the predicted value of the dispatched electric energy is: 1900Wh, that is, if the dispatched electric energy 2042Wh and dispatching electricity 1846Wh:

[0147] Each outlet is limited to have the same maximum flow rate, the maximum flow rate Q = 3 cubic meters / minute;

[0148] Calculate the minimum pumping time required to pump a unit volume of water from the lower reservoir to the upper reservoir at the maximum flow rate at the lower outlet;

[0149] The calculation formula for the lower limit of pumping time is:

[0150] Calculate the unit volume divided by the maximum flow rate, and record the result as the lower limit of pumping time = , less than 6 minutes, the lower outlet can be used alone to assist in pumping water, and the dispatching electricity can be partially compensated by the potential energy;

[0151] Calculating electrical energy Subtract the dispatched electric energy and record the result as the first electric energy , wherein the first electric energy is the electric energy that is lacking in dispatching electric energy to transport a unit volume of water from the lower reservoir to the upper reservoir;

[0152] calculate , the result is recorded as the first volume ;

[0153] The first volume is smaller than the unit volume because the dispatchable electric energy (plus auxiliary potential energy) is not enough to support the complete unit volume pumping task, which means that there will also be energy loss. During the calculation process, the first volume is calculated to maximize the utilization of dispatched electric energy and reduce the loss of dispatched electric energy.

[0154] In the scheme, the lower outlet discharges water at the maximum flow rate. In theory, there is no energy loss in the auxiliary dispatch of electricity during the monitoring period. However, due to various actual factors, energy loss is inevitable.

[0155] Calculate the first volume divided by the duration of the monitoring period and record the result as the first flow rate = ;

[0156] Control the water outlet according to the first flow Drainage, the drainage time is 6 minutes;

[0157] If the pumping limit is long Duration of the monitoring period:

[0158] In this embodiment, when the pumping lower limit time is long Theoretically, there will be energy consumption during the monitoring period. It is necessary to compare the energy consumption of using a single outlet and a combination of multiple outlets, and choose the one with the lowest energy consumption.

[0159] In this embodiment, when the monitoring period is 2 minutes, the lower limit of pumping time = , greater than 2 minutes;

[0160] Implement the optimal strategy for coordinated pumping energy efficiency, calculate the energy consumption of single-outlet and multi-outlet pumping schemes, and select the scheme with the least power loss;

[0161] When using the lower outlet pumping solution alone for pumping:

[0162] Calculate the maximum flow rate multiplied by the duration of the monitoring period and record the result as the second volume ;

[0163] calculate , the result is recorded as the second potential energy Since the lower reservoir has not discharged all the water, the potential energy of the discharged water should only be calculated based on the height of the discharged water. ,Similarly, assuming that part of the pumped water flows back into the lower reservoir, the unit volume of water rises to a height of 6m, which actually corresponds to the energy corresponding to the pumping of water;

[0164] calculate , the result is recorded as the second electrical energy Since the lower reservoir has not discharged all the water, the potential energy of the discharged water should only be calculated based on the electrical energy required to discharge the water. ,in ;

[0165] Calculate dispatching power - second power = 1900-1167 = 733Wh, as the energy consumption of a single water outlet;

[0166] When combining pumping schemes from multiple outlets for pumping:

[0167] Set the combination ratio of upper outlet, middle outlet and lower outlet to be , and ;

[0168] Among them, when When The corresponding outlet pumps water at the maximum flow rate;

[0169] when When The corresponding outlet does not participate in pumping;

[0170] when When The corresponding water outlet pumps water at the actual pumping flow rate;

[0171] Calculate the combined ratio of the upper outlet, middle outlet and lower outlet and multiply it by the maximum flow rate to obtain the actual pumping flow rate of the upper outlet, middle outlet and lower outlet. , , ;

[0172] For any water outlet;

[0173] Calculate the water level of the reservoir during the current monitoring period minus the water level at the outlet, and record it as the relative height;

[0174] If the relative height is less than or equal to 0, the relative height of the outlet is recorded as 0;

[0175] In this embodiment, the upper outlet = 130 m, the middle outlet = 110 m, and the lower outlet = 90 m, so the upper outlet and the middle outlet are invalid, and the water level of the lower reservoir is 100 m;

[0176] Get the actual pumping flow of the lower outlet ;

[0177] Measure the water outlet Reduction in relative height , is the height of the discharged water, used to calculate the potential energy of the discharged water;

[0178] Calculate the potential energy at the lower outlet:

[0179] ,in, The duration of the monitoring period;

[0180] Get the potential energy of the upper outlet, middle outlet and lower outlet, calculate the sum, and the result is the total potential energy .

[0181] Since the upper and middle water outlets are not used, there is no wasted potential energy;

[0182] Calculate the third electrical energy :

[0183] , the result is recorded as the third electrical energy. Since not all the water is discharged, the electrical energy required for pumping water is reduced proportionally;

[0184] Calculate dispatching power - third power = 1900 - 942.5 = 957.5Wh as the power loss of the pumping scheme for transporting water from the lower outlet reservoir to the upper reservoir through the combined lower outlet;

[0185] 957.5Wh is the energy consumption of the multiple outlet pumping scheme. 957.5Wh>733Wh, so at this time, a separate lower outlet is used to drain water according to the maximum flow rate.

[0186] When the idle power of the smart grid is low, the gravitational potential energy contained in the relative height difference between the water level of the lower reservoir and the upper reservoir is used to effectively offset part of the power consumption in the pumping process, significantly reducing the overall energy consumption of the system.

[0187] By building a dual-threshold judgment mechanism, the system intelligently selects to initiate pumping operations within the high-efficiency energy utilization range, avoiding the inefficient energy consumption caused by forced pumping during critically low power conditions. Furthermore, during some pumping operations, a dynamic control strategy combining outlet flow and pumping duration is employed, allowing only the amount of water required to offset potential energy and electrical energy to be pumped upstream, further reducing unnecessary power load.

[0188] If the dispatching power At the second threshold, the pipeline drainage strategy is implemented, using dispatched electricity to drain the water trapped in the pumping pipeline, including:

[0189] Use hydraulic valves to block the connection between the pumping pipe and the lower reservoir;

[0190] An air valve is provided between the pumping pipe and the upper reservoir to automatically introduce air into the pumping pipe;

[0191] The dispatched electric energy is used to drive the water pump to transport the water retained in the pumping pipeline to the upper reservoir.

[0192] Example 2, refer to Figure 2 , an intelligent water conservancy project data monitoring system, comprising:

[0193] The power monitoring and prediction module is used to collect the power consumption and supply records of the smart grid in real time and predict the idle power value in the future monitoring period;

[0194] The reservoir water level monitoring module is used to monitor the real-time water level information of the upper and lower reservoirs and collect water level data from three outlets at different heights on the side wall of the lower reservoir;

[0195] The dual-threshold power classification module is used to calculate two power thresholds based on the water level difference and pumping efficiency, classify the predicted idle power, and determine the appropriate pumping strategy for dispatching power;

[0196] The pumping control module is used to control the start and stop of the water pump according to the scheduling power and flow requirements, and adjust the pumping flow and pumping time of a single or a combination of multiple outlets;

[0197] The flow and duration calculation module is used to calculate the actual pumping flow of each outlet, evaluate the lower limit of the pumping time per unit volume of water, and dynamically adjust the pumping flow and duration based on the monitoring period;

[0198] The pipeline drainage module is used to control the hydraulic valve and air valve, and use the dispatching electric energy to drive the water pump to effectively drain the retained water in the pipeline;

[0199] The data management and scheduling module is used to divide the monitoring time period, manage and store monitoring data, and coordinate the data interaction and control instruction execution of each module.

[0200] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0201] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for monitoring data of intelligent water conservancy projects, characterized in that: include: Connect the pumped storage power station to the smart grid and use the idle electricity in the smart grid to drive the water pump to pump water from the lower reservoir to the upper reservoir. Specifically: Set monitoring intervals and divide a day into multiple monitoring periods based on the monitoring intervals; Execute the idle power prediction strategy to predict the power value of the next monitoring period, which is recorded as the dispatched power; There are three water outlets on the side wall of the lower reservoir, which are evenly spaced in the vertical direction and named as upper outlet, middle outlet and lower outlet from high to low; Execute a dual-threshold power classification strategy, calculate two thresholds for classifying idle power values, and name the two thresholds as the first threshold and the second threshold from largest to smallest; If the dispatching power At the first threshold, dispatching electric energy drives the water pump to pump water from the lower reservoir to the upper reservoir; If the dispatching power The first threshold and dispatching electric energy Second threshold: Limit each outlet to have the same maximum flow rate; Calculate the minimum pumping time required to pump a unit volume of water from the lower reservoir to the upper reservoir at the maximum flow rate at the lower outlet; If the pumping limit is long When the monitoring period is long, the lower outlet is used alone to assist in dispatching electricity to pump water from the lower reservoir to the upper reservoir; If the pumping limit is long The duration of the monitoring period; Implement the optimal strategy for coordinated pumping energy efficiency, calculate the energy consumption of single-outlet and multi-outlet pumping schemes, and select the scheme with the least power loss; If the dispatching power At the second threshold, the pipeline drainage strategy is executed, and the dispatched electricity is used to drain the water retained in the pumping pipeline.

2. The intelligent water conservancy project data monitoring method according to claim 1, characterized in that: The executing of the idle power prediction strategy to predict the power value of the next monitoring period includes: Obtain the historical electricity consumption and power supply records of the smart grid in the past 7 days; For the next monitoring period: Obtain all historical electricity consumption values during the monitoring period in the historical electricity consumption records, calculate the average of the historical electricity consumption values, and use the result as the average electricity consumption value; Obtain all historical power supply values during the monitoring period in the historical power supply records, calculate the average of the historical power supply values, and use the result as the average power supply value; Calculate the average power supply value minus the average power consumption value, and record it as the power consumption difference; When the power difference is greater than 0, the power difference is the predicted idle power value for the next monitoring period.

3. The intelligent water conservancy project data monitoring method according to claim 1, characterized in that: The dual-threshold power classification strategy is executed to calculate two thresholds for classifying idle power values, including: Get the water levels of the upper and lower reservoirs during the current monitoring period; Calculate the water level of the upper reservoir minus the water level of the lower reservoir to get the required height of the water in the lower reservoir ; Set pumping efficiency , represents the conversion efficiency of idle electrical energy into potential energy, ; Among them, the pumping efficiency The experimental results are as follows: Input a unit value of electrical energy to the pump ; Use flow meters to measure the volume of water transported from the lower reservoir to the upper reservoir ; calculate ,in, is the density of water, is the acceleration due to gravity, is the pumping efficiency; Calculate the electrical energy required to transport a unit volume of water from the lower reservoir to the upper reservoir : The calculation formula is: ,in, is the unit volume of water, It represents the potential energy contained in each cubic meter of water; Will As the first threshold, the first threshold is the minimum idle electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir.

4. The intelligent water conservancy project data monitoring method according to claim 3, characterized in that: The method of executing the dual-threshold power classification strategy and calculating two thresholds for classifying idle power values further includes: Get the water level of the lower outlet; Calculate the water level of the lower reservoir minus the water level of the lower outlet, and record the result as ; Get the water storage volume corresponding to the current water level of the lower reservoir in the reservoir capacity table ; Obtain the water storage volume at the lower outlet water level in the storage capacity table ; calculate , where the unit volume is Theoretical value, unit volume is less than or equal to ; when Calculate the potential energy used to assist pumping when : Set the conversion efficiency of potential energy into electrical energy , ; The calculation formula is: ; calculate ,in, is the second threshold; The second threshold is the minimum idle electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir with the assistance of the lower reservoir.

5. The intelligent water conservancy project data monitoring method according to claim 4, characterized in that: If the lower limit of pumping time is When the monitoring period is long, the lower outlet auxiliary dispatching power is used alone to pump water from the lower reservoir to the upper reservoir, including: The calculation formula for the lower limit of pumping time is: Calculate the unit volume divided by the maximum flow rate and record the result as the lower limit of pumping time; Calculating electrical energy Subtract the dispatched electric energy and record the result as the first electric energy , wherein the first electric energy is the electric energy that is lacking in dispatching electric energy to transport a unit volume of water from the lower reservoir to the upper reservoir; calculate ,in, is the first volume; Calculate the first volume and divide it by the duration of the monitoring period, and record the result as the first flow rate; The lower water outlet is controlled to discharge water according to the first flow rate, and the duration of the drainage is the duration of the monitoring period.

6. The intelligent water conservancy project data monitoring method according to claim 3, characterized in that: The method of executing the optimal coordinated pumping energy efficiency strategy and calculating the energy consumption of the pumping schemes of a single outlet and multiple outlets includes: When using the lower outlet pumping solution alone for pumping: Calculate the maximum flow rate multiplied by the duration of the monitoring period and record the result as the second volume ; Measure the water level in the reservoir before and after the second volume of water is reduced, and calculate the difference between the water levels before and after ; calculate ,in, is the second potential energy; calculate , is the second electrical energy; Calculate the dispatching electric energy - the second electric energy as the energy consumption of a single water outlet; When combining pumping schemes from multiple outlets for pumping: Set the combination ratio of upper outlet, middle outlet and lower outlet to be , and ; Calculate the combined ratio of the upper outlet, middle outlet and lower outlet and multiply it by the maximum flow rate to obtain the actual pumping flow rate of the upper outlet, middle outlet and lower outlet. , , ; For any water outlet; Calculate the water level of the reservoir during the current monitoring period minus the water level at the outlet, and record it as the relative height; If the relative height is less than or equal to 0, the relative height of the outlet is recorded as 0; Get the actual pumping flow at the outlet ; Measure the water outlet The change in relative height ; Calculate the potential energy of the outlet , The duration of the monitoring period; Get the potential energy of the upper outlet, middle outlet and lower outlet, calculate the sum, and the result is the total potential energy .

7. The intelligent water conservancy project data monitoring method according to claim 6, characterized in that: The method of executing the coordinated pumping energy efficiency optimization strategy and calculating the energy consumption of the single outlet and multiple outlet pumping schemes also includes: calculate , the result is the potential energy lost; calculate ,in, is the third electrical energy; Calculate the dispatching power - the third power, as the power loss of the pumping scheme for transporting water from the lower outlet reservoir to the upper reservoir by combining the lower outlet ; calculate ,result Energy consumption as a pumping scheme with multiple outlets.

8. The intelligent water conservancy project data monitoring method according to claim 1, characterized in that: If the dispatching of electric energy At the second threshold, the pipeline drainage strategy is implemented, using dispatched electricity to drain the water trapped in the pumping pipeline, including: Use hydraulic valves to block the connection between the pumping pipe and the lower reservoir; An air valve is provided between the pumping pipe and the upper reservoir to automatically introduce air into the pumping pipe; The dispatched electric energy is used to drive the water pump to transport the water retained in the pumping pipeline to the upper reservoir.

9. An intelligent water conservancy project data monitoring system, applied to the intelligent water conservancy project data monitoring method according to claims 1-8, characterized in that: include: The power monitoring and prediction module is used to collect the power consumption and supply records of the smart grid in real time and predict the idle power value in the future monitoring period; The reservoir water level monitoring module is used to monitor the real-time water level information of the upper and lower reservoirs and collect water level data from three outlets at different heights on the side wall of the lower reservoir; The dual-threshold power classification module is used to calculate two power thresholds based on the water level difference and pumping efficiency, classify the predicted idle power, and determine the appropriate pumping strategy for dispatching power; The pumping control module is used to control the start and stop of the water pump according to the scheduling power and flow requirements, and adjust the pumping flow and pumping time of a single or a combination of multiple outlets; The flow and duration calculation module is used to calculate the actual pumping flow of each outlet, evaluate the lower limit of the pumping time per unit volume of water, and dynamically adjust the pumping flow and duration based on the monitoring period; The pipeline drainage module is used to control the hydraulic valve and air valve, and use the dispatching electric energy to drive the water pump to effectively drain the retained water in the pipeline; The data management and scheduling module is used to divide the monitoring time period, manage and store monitoring data, and coordinate the data interaction and control instruction execution of each module.

Images