Intelligent hydraulic engineering data monitoring method and system

Abstract

The invention relates to the technical field of hydraulic engineering data monitoring, and discloses an intelligent hydraulic engineering data monitoring method and system, and the method comprises the steps: executing an idle electric energy prediction strategy, predicting an electric energy value of a next monitoring time period, and recording the electric energy value as scheduling electric energy; executing a double-threshold electric energy classification strategy, and calculating two thresholds for classifying idle electric energy values; if the electric energy # imgabs0 # first threshold value and the electric energy # imgabs1 # second threshold value are dispatched, the water pumping lower limit duration of pumping water of unit volume in the lower reservoir to the upper reservoir by the lower water outlet according to the maximum flow is calculated; if the water pumping lower limit duration # imgabs2 is the duration of the monitoring period, water in the lower reservoir is pumped to the upper reservoir by independently using the auxiliary dispatching electric energy of the lower water outlet; if the water pumping lower limit duration is the duration of the monitoring time period # imgabs3 #; and executing a collaborative water pumping energy efficiency optimal strategy, calculating energy consumption of a single-water-outlet water pumping scheme and a multi-water-outlet water pumping scheme, selecting a scheme with the minimum electric energy loss, and reducing idle low-numerical-value electric energy loss in the smart power grid.

Description

Technical Field

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

[0002] With the access of renewable energy sources such as wind energy and solar energy to the power system, the power volatility in the power grid is increasing day by day, and there is often a phenomenon of power surplus in some periods. Connecting a pumped-storage power station to the smart grid can utilize the idle power during these peak periods to drive the water pump to pump water from the lower reservoir to the upper reservoir, realizing the dual benefits of "peak shaving and valley filling" and energy time shift, and improving the flexibility and security of the power grid operation.

[0003] In the existing scheme for pumping scheduling, it mostly controls based on simple electricity price prediction or grid load strategy, and fails to scientifically evaluate the minimum effective electricity threshold required for each pumping operation. Especially in the scenarios where the total amount of idle power is small or the fluctuation is frequent, the system usually directly discards this low electricity, believing that it is not sufficient to drive effective pumping, resulting in a large amount of wasted available resources. And only considering the current electricity price or grid load, it does not comprehensively evaluate the minimum electricity threshold required for pumping behavior, nor does it make full use of the potential energy contribution of different hydraulic paths (such as the upper water outlet and the lower water outlet). This leads to the system may start the water pump to operate in an inefficient or even power-insufficient state, generating unnecessary energy consumption. In addition, some systems fail to utilize the water level linkage mechanism between the lower reservoir and the natural lake to dynamically adjust the water level, thus unable to actively release the potential energy resources with auxiliary pumping ability. The existing technology lacks a set of judgment mechanisms for scientifically quantifying the "minimum auxiliary electricity" and "minimum pumpable electricity", resulting in the waste of some idle power resources and making it difficult to achieve refined scheduling control.

[0004] This solution proposes an intelligent water conservancy project data monitoring method and system, which calculates the potential energy that can be released from the lower reservoir by combining the geometric height differences of the upper, middle, and lower water outlets, and evaluates its auxiliary ability 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 for facilitating the solution of the problems mentioned in the above background art.

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

[0007] Connect a pumped-storage power station to the smart grid, and use the idle power in the smart grid to drive the water pump to pump the water in the lower reservoir to the upper reservoir, specifically:

[0008] Set a monitoring interval, and divide a day into multiple monitoring periods with the monitoring interval as the unit;

[0009] Execute the idle power prediction strategy to predict the power value for the next monitoring period, denoted as the dispatching power.

[0010] There are three water outlets on the side wall of the lower reservoir, evenly distributed along the vertical direction, named the upper water outlet, the middle water outlet, and the lower water outlet from high to low.

[0011] Execute the dual-threshold power classification strategy to calculate two thresholds for classifying the idle power value, and name the two thresholds as the first threshold and the second threshold from large to small.

[0012] If the dispatching power > the first threshold, use the dispatching power to drive the water pump to pump water from the lower reservoir to the upper reservoir.

[0013] If the dispatching power ≤ the first threshold and the dispatching power > the second threshold:

[0014] Limit that each water outlet has the same maximum flow rate.

[0015] Calculate the minimum pumping duration for the lower water outlet to pump a unit volume of water from the lower reservoir to the upper reservoir at the maximum flow rate.

[0016] If the minimum pumping duration ≤ the duration of the monitoring period, then use only the lower water outlet to assist the dispatching power to pump the water in the lower reservoir to the upper reservoir.

[0017] If the minimum pumping duration > the duration of the monitoring period;

[0018] Execute the collaborative pumping energy efficiency optimization strategy, calculate the energy consumption of single water outlet and multiple water outlet pumping schemes, and select the scheme with the minimum power loss.

[0019] If the dispatching power ≤ the second threshold, then execute the pipeline drainage strategy to use the dispatching power to drain the stagnant water in the pumping pipeline.

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

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

[0022] For the next monitoring period:

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

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

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

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

[0027] Optionally, the execution of the dual-threshold power energy classification strategy, calculating two thresholds for classifying idle power energy values, includes:

[0028] Obtain the water levels of the upper reservoir and the lower reservoir during the current monitoring period;

[0029] Calculate the water level of the upper reservoir minus the water level of the lower reservoir, which is the height that the water in the lower reservoir needs to be lifted; ;

[0030] Set the pumping efficiency , indicating the conversion efficiency when idle power energy is converted into potential energy, ;

[0031] Among them, the pumping efficiency is obtained through experiments, and the experimental steps are:

[0032] Input a unit value of power energy into the water pump ;

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

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

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

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

[0037] Take as the first threshold, and the first threshold is the minimum idle power energy required to transport a unit volume of water from the lower reservoir to the upper reservoir.

[0038] Optionally, when implementing the dual-threshold electric energy classification strategy and calculating two thresholds for classifying idle electric energy values, it further includes:

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

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

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

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

[0043] Calculate , where the unit volume is the theoretical value of , and the unit volume is less than or equal to ;

[0044] When , calculate the potential energy for auxiliary pumping :

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

[0046] The calculation formula of is:

[0047] Calculate , where is the second threshold;

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

[0049] Optionally, if the lower pumping time limit is less than the duration of the monitoring period, then use only the lower outlet to assist in scheduling electric energy to pump the water in the lower reservoir to the upper reservoir, including:

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

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

[0052] Calculate the electric energy minus the scheduling electric energy, and record the result as the first electric energy , where the first electric energy is the electric energy lacking for the scheduling electric energy to transport a unit volume of water from the lower reservoir to the upper reservoir;

[0053] Calculate , where is the first volume;

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

[0055] Control the lower outlet to drain water at the first flow rate, and the drainage duration is the duration of the monitoring period.

[0056] Optionally, when implementing the optimal co-pumping energy efficiency strategy, calculate the energy consumption of the single outlet and multiple outlet pumping schemes, including:

[0057] When pumping water using the pumping scheme of the lower outlet alone:

[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 levels in the lower reservoir before and after reducing the water volume by the second volume, and calculate the difference in water levels before and after ;

[0060] Calculate , where is the second potential energy;

[0061] Calculate , is the second electric energy;

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

[0063] When pumping water using the combined pumping schemes of multiple outlets:

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

[0065] Calculate the combination ratios of the upper outlet, middle outlet, and lower outlet multiplied by the maximum flow rate respectively as the actual pumping flow rates of the upper outlet, middle outlet, and lower outlet , , ;

[0066] For any one outlet;

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

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

[0069] Obtain the actual pumping flow rate of the water outlet ;

[0070] Measure the change value of the relative height after the water outlet discharges ; ;

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

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

[0073] Optionally, when implementing the optimal strategy for collaborative pumping energy efficiency, calculating the energy consumption of single water outlet and multiple water outlet pumping schemes further includes:

[0074] Calculate , and the result is used as the lost potential energy;

[0075] Calculate , where is the third electric energy;

[0076] Calculate the scheduling electric energy - the third electric energy, and use it as the electric energy loss of the pumping scheme for transporting the water in the lower reservoir to the upper reservoir by the combined lower water outlet ;

[0077] Calculate , and the result is used as the energy consumption of the multiple water outlet pumping scheme.

[0078] Optionally, if the scheduling electric energy is less than the second threshold, then execute the pipeline drainage strategy, and use the scheduling electric energy to drain the water retained in the pumping pipeline, including:

[0079] Use a hydraulic valve to block the connection between the pumping pipeline and the lower reservoir;

[0080] Set an air valve between the pumping pipeline and the upper reservoir to automatically introduce air into the pumping pipeline;

[0081] Use the scheduling electric energy to drive the water pump to transport the water retained in the pumping pipeline to the upper reservoir.

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

[0083] An electric energy monitoring and prediction module, which is used to collect the electricity consumption and power supply records of the smart grid in real time and predict the idle electric energy value within the future monitoring period;

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

[0085] The dual-threshold electric energy classification module is used to calculate two electric energy thresholds according to the water level difference and pumping efficiency, classify the predicted idle electric energy, and judge the pumping strategy applicable to the dispatching electric energy;

[0086] The pumping control module is used to control the start and stop of the water pump according to the dispatching electric energy and the flow demand, and adjust the pumping flow rate and pumping duration of a single or a combination of multiple outlets;

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

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

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

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

[0091] 1. For this intelligent water conservancy project data monitoring method, by obtaining the electricity consumption and power supply records of the smart grid in the past 7 days, a real-time updatable predicted electric energy surplus model is constructed to judge in advance whether the conditions for dispatching pumping are available, which improves the automatic adjustment ability of the entire intelligent water conservancy project system; the division of the monitoring period can be dynamically adjusted according to requirements. When the power fluctuation is large, the monitoring interval can be reduced to increase the processing capacity. When the power fluctuation is small, the monitoring interval can be increased to reduce the number of processing times and improve the processing efficiency.

[0092] 2. For this intelligent water conservancy project data monitoring method, by using the pumping efficiency measured by experimental data and combining the water level difference between the upper reservoir and the lower reservoir, the minimum idle electric energy (i.e., the first threshold) required to pump a unit volume of water to the upper reservoir is calculated to form a clear demarcation standard. When the idle electric energy is greater than the first threshold, it means that the idle electric energy can independently perform the pumping operation, and then store electric energy in the upper reservoir, without the need to use the potential energy of the lower reservoir to assist pumping, reducing complex operation steps and improving the energy conversion efficiency.

[0093] 3. For the intelligent water conservancy project data monitoring method, to calculate the second threshold, the current water storage volume corresponding to the water level of the lower reservoir is temporarily used as an approximation of the theoretically available auxiliary pumping volume. Based on this, the auxiliary potential energy is calculated, and then the potential energy is converted into electrical energy according to the conversion efficiency. Finally, the minimum threshold of the scheduling electrical energy required to complete pumping under the cooperation of the natural water potential is calculated. It is considered that when the scheduling electrical energy is greater than or equal to the second threshold, the potential energy of the lower reservoir can be used to assist the scheduling electrical energy for pumping. Since using only the scheduling electrical energy is not sufficient to pump the water in the lower reservoir to the upper reservoir, the natural potential energy of the lower outlet is used to assist in water delivery at this time, storing the scheduling electrical energy that should otherwise be discarded and improving the energy utilization efficiency. In actual operation, the auxiliary pumping process usually involves an amount of water close to 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. For the intelligent water conservancy project data monitoring method, the potential energy of the water in the lower reservoir can only be maximally utilized through the lower outlet. Since the potential energy can replace electrical energy for pumping in this scheme, saving potential energy means saving electrical energy. At this time, the minimum pumping duration required for the lower outlet to drain water at the maximum flow rate is calculated first. If the minimum pumping duration is less than the duration of the monitoring period, it means that only using the lower outlet can assist the scheduling electrical energy for pumping, wasting the least amount of scheduling electrical energy and potential energy. The actual flow rate of the lower outlet only needs to be calculated according to the duration of the monitoring period to achieve the auxiliary purpose.

[0095] 5. For the intelligent water conservancy project data monitoring method, when the minimum pumping duration is greater than the monitoring duration, it means that if we want to maximize the utilization of potential energy, it will inevitably lead to the loss of some scheduling electrical energy during the monitoring period. Because there is no matching auxiliary electrical energy for the lost part of the scheduling electrical energy, part of the potential energy can only be generated outside the monitoring period. And at this time, not all the water in the lower reservoir is discharged, nor is all the water per unit volume discharged. Therefore, the electrical energy is quantified according to the ratio of the second volume to the water storage volume in the lower reservoir. If we want to utilize the potential energy of the lower reservoir during the monitoring period, multiple outlets must be opened. Opening multiple outlets will cause loss of potential energy. For example, the upper outlet discharges the water that should have been discharged from the lower outlet at a higher height, reducing the potential energy of the water. So the potential energy decreases, and the scheduling electrical energy matching the potential energy decreases, inevitably causing some scheduling electrical energy to be wasted without matching the corresponding potential energy. Therefore, the energy consumption is divided into the loss of potential energy and the loss of scheduling electrical energy. By comparing the two schemes, the scheme with the minimum energy consumption is taken as the final scheme to reduce energy consumption.

[0096] 6. The intelligent water conservancy project data monitoring method blocks the hydraulic valve between the pipeline and the lower reservoir, sets an air valve to introduce air to form a pressure difference, and combines the limited dispatching electric energy to drive the water pump to transport the stagnant water in the pipeline to the upper reservoir, avoiding pipeline corrosion, operation blockage and startup failure caused by water accumulation. It plays a significant role in ensuring the safe operation of the pipeline and the water body hygiene, and effectively utilizes the limited electric energy to avoid waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0097] Figure 1 It is a schematic flow chart of the method of the present invention.

[0098] Figure 2 It is a schematic diagram of the system module of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0099] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0100] Embodiment 1. Refer to Figure 1 , an intelligent water conservancy project data monitoring method, including:

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

[0102] Connect the pumped-storage power station to the smart grid, and use the time-periodic idle electric energy in the smart grid to drive the water pump to pump the water in the lower reservoir to the upper reservoir. On the one hand, this method can absorb the excess electric energy during the low-power consumption period, relieve the peak-valley load fluctuation of the power grid, and promote the coordinated dispatching of new energy power generation (such as wind power and photovoltaic power) and traditional power sources; on the other hand, by converting the electric energy into water level potential energy and storing it in the upper reservoir, it can be converted into electric energy output according to the demand during the high-power consumption period in the future, realizing the space-time transfer and flexible release of energy.

[0103] Set the monitoring interval, and divide a day into multiple monitoring periods with the monitoring interval as the unit;

[0104] Execute the idle electric energy prediction strategy to predict the electric energy value in the next monitoring period, denoted as the dispatching electric energy;

[0105] In this embodiment, the historical records of the most recent 7 days are obtained because the output of new energy in the power grid fluctuates significantly and the load cannot be responded to in real time. It is still inevitable that short-term idle power may be generated during the actual operation of the smart grid. By predicting the idle power value in each monitoring period in advance, the pre-scheduling of energy storage devices can be realized, and the power utilization efficiency can be improved.

[0106] There are three water outlets on the side wall of the lower reservoir, which are evenly distributed in the vertical direction and are named the upper water outlet, the middle water outlet, and the lower water 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 water outlet is 90 meters;

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

[0109] The duration of the monitoring period is 6 minutes;

[0110] Unit volume: 10 cubic meters;

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

[0112] Execute the double-threshold electric energy classification strategy, calculate the two thresholds for classifying the electric energy value for idling, and name the two thresholds the first threshold and the second threshold respectively from large to small;

[0113] Obtain the water levels of the upper reservoir and the lower reservoir in the current monitoring period;

[0114] Calculate the water level of the upper reservoir minus the water level of the lower reservoir, which is the height that the water in the lower reservoir needs to be lifted, in meters, for calculating the increased gravitational potential energy;

[0115] Set the pumping efficiency , which represents the conversion efficiency when idle electric energy is converted into potential energy, ;

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

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

[0118] The calculation formula of is: where is the unit volume of water, represents the potential energy contained in each cubic meter of water, and the density of water ;

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

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

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

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

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

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

[0125] When , calculate the potential energy for assisting pumping :

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

[0127] The calculation formula of

[0128] ;

[0129] In engineering, is used to calculate the potential energy of the stored water because it is assumed that all the water flows back from the lower water outlet of the lower reservoir to the current water level of the lower reservoir. Therefore, the actual lifting height of the water per unit volume is , and its gravitational potential energy is approximately equal to the energy for the water pump to lift the water. Moreover, the process of pumping water from the lower reservoir is dynamically changing, and the theoretically calculated center of gravity should not be used to calculate the stored energy. The advantages are as follows:

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

[0131] Simplicity: There is no need to track the changes during the process of the water level dropping;

[0132] Direct correlation with energy consumption: This is exactly the lifting height that the water pump must overcome at this moment;

[0133] Calculate , and the result is used 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] In this solution, to facilitate the calculation of the second threshold, the overall water storage volume corresponding to the current water level of the lower reservoir is used as an approximation of the auxiliary pumping volume. In actual operation, the auxiliary pumping process is usually based on a water volume close to this water volume, and the water level of the lower reservoir is often adjusted through the water connection with adjacent natural lakes to achieve dynamic water level control. Therefore, this calculation method not only meets the theoretical requirements but also conforms to the actual operation situation.

[0136] Moreover, considering that the water volume in the lower reservoir will change dynamically with the water level, and in the actual pumping process, the effective pumping volume is affected by various factors such as the water level, the height and flow rate of the outlet. If the entire water volume is directly used as the unit volume to calculate the potential energy, it is easy to overestimate the available potential energy, thus affecting the accuracy and rationality of the scheduling.

[0137] The rationality explanation for preferentially using the lower outlet. It is a reasonable and efficient choice to preferentially use the lower outlet alone for auxiliary scheduling of electric energy for pumping. The reasons include:

[0138] 1) Maximizing potential energy utilization: The water level corresponding to the lower outlet is the lowest, the head difference is the largest, and the potential energy released by a unit volume of water is the highest, with a relatively high conversion efficiency to electric energy.

[0139] 2) Simplifying control and management: The single-port pumping structure is simple, easy to operate and maintain, reducing the system complexity and control cost.

[0140] 3) Reducing potential energy loss: It avoids the problem of rapid water level drop caused by simultaneous pumping of multiple ports and the aggravation of potential energy loss at low-head ports.

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

[0142] Take as the first threshold, and 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 scheduling electric energy the first threshold, use the scheduling electric energy to drive the water pump to pump water from the lower reservoir to the upper reservoir;

[0144] If the scheduling electric energy the first threshold and the scheduling electric energy the second threshold:

[0145] If the lower pumping limit duration When monitoring the duration of the time period, the lower outlet is used alone to assist in scheduling electric energy to pump the water in the lower reservoir to the upper reservoir; it is shown that pumping can definitely be carried out within the monitoring time period.

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

[0147] It is specified that each outlet has the same maximum flow rate, and the maximum flow rate Q = 3 cubic meters per minute.

[0148] Calculate the lower limit duration of pumping for the lower outlet to pump a unit volume of water from the lower reservoir to the upper reservoir at the maximum flow rate.

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

[0150] Calculate the unit volume divided by the maximum flow rate, and the result is recorded as the lower limit duration of pumping = , which is less than 6 minutes. The lower outlet can be used alone to assist in pumping, and the scheduling electric energy can be partially compensated by potential energy.

[0151] Calculate the electric energy subtract the scheduling electric energy, and the result is recorded as the first electric energy , where the first electric energy is the electric energy lacking for the scheduling electric energy to transport a unit volume of water from the lower reservoir to the upper reservoir.

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

[0153] The first volume is less than the unit volume because the schedulable electric energy (plus the auxiliary potential energy) is not sufficient to support the complete pumping task of the unit volume, that is to say, there will also be energy consumption losses. In the calculation process, the first volume is calculated with the maximum utilization of the scheduling electric energy to reduce the loss of the scheduling electric energy.

[0154] In the scheme, when the lower outlet drains water at the maximum flow rate, there is theoretically no energy consumption loss in assisting the scheduling electric energy during the monitoring time period. However, due to various actual factors, there will inevitably be energy consumption losses.

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

[0156] Control the lower outlet to drain water at the first flow rate , and the drainage duration is 6 minutes.

[0157] If the lower limit duration of pumping is the duration of the monitoring time period:

[0158] In this embodiment, when the lower limit duration of pumping water is the duration of the monitoring period, there will theoretically be energy consumption. It is necessary to compare the energy consumption of using only the lower outlet and the energy consumption of the combination of multiple outlets, and select the one with the lowest energy consumption;

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

[0160] Execute the optimal energy efficiency strategy for collaborative pumping, calculate the energy consumption of the pumping schemes of a single outlet and multiple outlets, and select the scheme with the smallest power loss;

[0161] When pumping water using the pumping scheme of only the lower outlet:

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

[0163] Calculate , and record the result as the second potential energy . Since the lower reservoir does not discharge all the water, the potential energy of the discharged water should only be calculated for the height of the discharged water . Similarly, assuming that part of the pumped water flows back into the lower reservoir, so the height that the water of unit volume rises is 6m, which actually corresponds to the energy of the water pump pumping;

[0164] Calculate , and record the result as the second electric energy . Since the lower reservoir does not discharge all the volume of water, the potential energy of the discharged water should only be calculated for the electric energy required for the discharged water , where ;

[0165] Calculate the scheduling electric energy - the second electric energy = 1900 - 1167 = 733 Wh, which is used as the energy consumption of a single outlet;

[0166] When pumping water using the pumping scheme of combining multiple outlets:

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

[0168] Among them, when , it means that the corresponding outlet pumps water at the maximum flow rate;

[0169] When , it means that the corresponding outlet does not participate in pumping water;

[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 rate of the lower outlet ;

[0177] Measure the water outlet at the discharge Relative height reduction after , 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, is 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 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 by combining the lower outlet;

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

[0186] When the idle electric energy 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 utilized to effectively offset part of the electric energy consumption during the pumping process, significantly reducing the overall energy consumption of the system.

[0187] By constructing a dual-threshold determination mechanism, the system can intelligently select to start the pumping operation within the efficient energy utilization interval, avoiding the ineffective energy consumption caused by forced pumping in the critical low-electricity state. In addition, during part of the pumping process, a dynamic control strategy combining the outlet flow rate and pumping duration is also adopted, and only the water volume that meets the potential energy-electric energy offset condition is used for upward delivery, further reducing the unnecessary power load.

[0188] If the dispatching electric energy is lower than the second threshold, the pipeline drainage strategy is executed, and the dispatching electric energy is used to drain the water retained in the pumping pipeline, including:

[0189] Using a hydraulic valve to block the connection between the pumping pipeline and the lower reservoir;

[0190] Setting an air valve between the pumping pipeline and the upper reservoir to automatically introduce air into the pumping pipeline;

[0191] Using the dispatching electric energy to drive the water pump to transport the water retained in the pumping pipeline to the upper reservoir.

[0192] Embodiment 2, referring to Figure 2 , an intelligent water conservancy project data monitoring system, including:

[0193] An electric energy monitoring and prediction module, used to collect the electricity consumption and power supply records of the smart grid in real time and predict the idle electric energy value within the future monitoring period;

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

[0195] A dual-threshold electric energy classification module, used to calculate two electric energy thresholds according to the water level difference and pumping efficiency, classify the predicted idle electric energy, and judge the pumping strategy applicable to the dispatching electric energy;

[0196] A pumping control module, used to control the start and stop of the water pump according to the dispatching electric energy and flow demand, and adjust the pumping flow rate and pumping duration of a single or combined multiple water outlets;

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

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

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

[0200] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0201] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent water conservancy project data monitoring method, characterized in that, Including: Connect the pumped - storage power station to the smart grid, and use the idle electric energy in the smart grid to drive the water pump to pump the water in the lower reservoir to the upper reservoir. Specifically: Set the monitoring interval, and divide a day into multiple monitoring periods with the monitoring interval as the unit. Execute the idle electric energy prediction strategy to predict the electric energy value of the next monitoring period, denoted as the dispatching electric energy. There are three water outlets on the side wall of the lower reservoir, which are evenly distributed in the vertical direction and are named the upper water outlet, the middle water outlet, and the lower water outlet from high to low respectively. Execute the dual - threshold electric energy classification strategy to calculate two thresholds for classifying the idle electric energy value, and name the two thresholds as the first threshold and the second threshold from large to small respectively. If the scheduled electric energy is less than the first threshold value, the scheduled electric energy is used to drive a water pump to pump water from the lower reservoir to the upper reservoir; If the scheduled electric energy is greater than the first threshold and the scheduled electric energy is less than the second threshold: Limit that each water outlet has the same maximum flow rate. Calculate the minimum pumping time limit for pumping a unit volume of water from the lower reservoir to the upper reservoir at the maximum flow rate of the lower water outlet. If the minimum pumping duration is the duration of the monitoring period, the lower outlet is used alone to assist in scheduling electric energy to pump the water in the lower reservoir to the upper reservoir; If the lower limit duration of water pumping When monitoring the duration of the time period; Execute the cooperative pumping energy efficiency optimization strategy to calculate the energy consumption of the single - outlet and multi - outlet pumping schemes, and select the scheme with the minimum power loss. If the scheduled electric energy is greater than the second threshold, execute the pipeline drainage strategy and use the scheduled electric energy to drain the water remaining in the pumping pipeline.

2. The intelligent water conservancy project data monitoring method according to claim 1, characterized in that The execution of the idle electric energy prediction strategy to predict the electric energy value of the next monitoring period includes: Obtain the historical electricity consumption records and historical 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 mean value of the historical electricity consumption values, and the result is used as the average electricity consumption value. Obtain all historical power supply values during the monitoring period in the historical power supply records, calculate the mean value of the historical power supply values, and the result is used as the average power supply value. Calculate the average power supply value - the average electricity consumption value, denoted as the electricity consumption difference. When the electricity consumption difference is greater than 0, the electricity consumption difference is the predicted idle electric energy value of the next monitoring period.

3. The intelligent water conservancy project data monitoring method according to claim 1, characterized in that The execution of the dual - threshold electric energy classification strategy to calculate two thresholds for classifying the idle electric energy value includes: Obtain the water levels of the upper reservoir and the lower reservoir during the current monitoring period. Calculate the water level of the upper reservoir minus the water level of the lower reservoir, which is the height that the water in the lower reservoir needs to be lifted ; Set the pumping efficiency , representing the conversion efficiency when idle electric energy is converted into potential energy, ; Among them, the pumping efficiency is obtained from the experiment. The experimental steps are as follows: Input unit value of electrical energy into the water pump ; Use a flowmeter to measure the volume of water transported from the lower reservoir to the upper reservoir ; Calculation , where is the density of water, is the acceleration due to gravity, is the pumping efficiency; Calculate the electric energy required to transport a unit volume of water from the lower reservoir to the upper reservoir : The calculation formula is as follows: , where is the unit volume of water, represents the potential energy contained in each cubic meter of water; Take as the first threshold value, where the first threshold value is the minimum idle electric energy for transporting 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 execution of the dual - threshold electric energy classification strategy to calculate two thresholds for classifying the idle electric energy value also includes: Obtain the water level of the lower water outlet. Calculate the water level of the lower reservoir - the water level of the lower outlet, and record the result as ; Obtain the water storage volume corresponding to the current water level of the lower reservoir in the storage capacity table ; Obtain the water storage volume with the water level below the lower outlet water level in the storage capacity table ; Calculation , where the theoretical value of the unit volume is , and the unit volume is less than or equal to ; When calculate the potential energy for assisting pumping : Set the conversion efficiency of potential energy into electric energy , ; The calculation formula is as follows: ; Calculation , where is the second threshold value; The second threshold is the minimum idle electric energy for transporting 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, wherein, When the lower limit duration of pumping water is monitored during a certain period, the lower outlet is used alone to assist in scheduling electric energy to pump water from the lower reservoir to the upper reservoir, including: The calculation formula for the minimum pumping time limit is: Calculate the unit volume divided by the maximum flow rate, and the result is denoted as the minimum pumping time limit. Calculating electrical energy Subtract the dispatched electrical energy, and record the result as the first electrical energy , where the first electrical energy is the electrical energy lacking for transporting water of a unit volume from the lower reservoir to the upper reservoir by the dispatched electrical energy; Calculation , wherein is the first volume; Calculate the first volume divided by the duration of the monitoring period, and denote the result as the first flow rate. Control the lower water outlet to drain water at the first flow rate, and the drainage duration is the duration of the monitoring period.

6. The intelligent water conservancy project data monitoring method according to claim 3, characterized in that The execution of the cooperative pumping energy efficiency optimization strategy to calculate the energy consumption of the single - outlet and multi - outlet pumping schemes includes: When using the pumping scheme of the lower water outlet 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 levels in the lower reservoir before and after reducing the second volume of water, and calculate the difference in water levels before and after ; Calculation , where is the second potential energy; Calculation , is the second electric energy; Calculate the dispatching electric energy - the second electric energy as the energy consumption of the single outlet. When using the combined pumping scheme of multiple water outlets for pumping: Set the combined ratios of the upper water outlet, the middle water outlet, and the lower water outlet to be respectively , and ; Multiply the combined ratios of the upper water outlet, the middle water outlet, and the lower water outlet by the maximum flow rate respectively to obtain the actual pumping flow rates of the upper water outlet, the middle water outlet, and the lower water outlet , , ; For any one water outlet; Calculate the water level height of the lower reservoir during the current monitoring period - the water level of the water outlet, denoted as the relative height. If the relative height is less than or equal to 0, record the relative height of this water outlet as 0. Obtain the actual pumping flow rate at the water outlet ; Measure the change value of the relative height after the water outlet discharges ;​ Calculate the potential energy of the water outlet , is the duration of the monitoring period; Obtain the potential energies of the upper water outlet, the middle water outlet, and the lower water 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 execution of the cooperative pumping energy efficiency optimization strategy to calculate the energy consumption of the single - outlet and multi - outlet pumping schemes also includes: Calculation , and the result is used as the potential energy loss; Calculation , where is the third electric energy; Calculate the scheduling electric energy - the third electric energy, which is the electric energy loss of the pumping scheme that transports the water in the lower reservoir to the upper reservoir as the combined lower water outlet ; Calculation , the result is used as the energy consumption of the pumping scheme for multiple water outlets.

8. The intelligent water conservancy project data monitoring method according to claim 1, characterized in that If the scheduled electric energy is greater than the second threshold, execute the pipeline drainage strategy, and use the scheduled electric energy to drain the water remaining in the pumping pipeline, including: Use a hydraulic valve to block the connection between the pumping pipeline and the lower reservoir; Install an air valve between the pumping pipeline and the upper reservoir to automatically introduce air into the pumping pipeline; Use the scheduled electric energy to drive the water pump to transport the water remaining in the pumping pipeline to the upper reservoir.

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

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