Ecological flow regulation method and device and terminal equipment

Abstract

The application relates to the technical field of water conservancy projects, and provides an ecological flow regulation method, device and terminal equipment, which comprises the following steps: obtaining natural inflow process data of a river channel where an upper reservoir is located, and obtaining minimum ecological flow of the river channel; based on the natural inflow process data, daily average natural inflow flow of different water periods is calculated respectively; minimum water head and typical water head of the upper reservoir are determined; based on the typical water head and the daily average natural inflow flow corresponding to different water periods, the required flow area of an ecological flow pipe under different water periods is calculated respectively; based on the required flow area of the ecological flow pipe under different water periods, M flow pipes with different diameters are designed; based on the daily natural inflow flow, the required target flow area of the ecological flow pipe is calculated; based on the target flow area, a target flow pipe is determined from the M flow pipes, and the valve opening degree of a flow valve of the target flow pipe is adjusted based on the target flow area. In this way, the regulation effect of ecological flow can be improved.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering technology, specifically to an ecological flow regulation method, device, and terminal equipment. Background Technology

[0002] Pumped storage power stations, as an important regulating power source in new power systems, are typically built on small and medium-sized rivers or streams. Moreover, when the reservoir dam site is located in a section of the river with natural water inflow, ecological flow release facilities must be installed to maintain the ecological function of the downstream river channel.

[0003] Currently, fixed-aperture ecological flow pipes are commonly used as the primary means of reservoir discharge in pumped storage projects. For example, the pipe diameter is designed based on the principle that the discharge flow at the lowest operating water level equals the minimum ecological flow. When the operating water level rises, the ecological flow is regulated by a flow control valve at the end of the ecological flow pipe. While this approach ensures ecological safety, it overlooks the fact that the reservoir water level in pumped storage power stations fluctuates significantly throughout the day due to pumping and power generation cycles, necessitating frequent adjustments to the flow control valve opening to cope with changes in water head.

[0004] Meanwhile, during the operation of a pumped-storage power station, the water volume between the upper and lower reservoirs is exchanged frequently throughout the day (pumping / power generation cycle). Natural inflow, as an additional input, is not part of the energy conversion cycle and must be entirely transferred downstream on the same day (for daily regulating pumped-storage power stations). It cannot remain for extended periods; otherwise, it will crowd out the effective regulating capacity and affect the safe and stable operation of the power station. When designing ecological flow pipes based on the minimum operating water level, the average daily discharge is often significantly lower than the natural inflow. To meet the rigid requirement of "same-day inflow, same-day discharge," operators often conduct concentrated daily replenishment and discharge through maintenance of vent valves, bypass pipes, and other auxiliary facilities, generating short-duration, high-flow pulse water flows that severely disturb the downstream ecosystem.

[0005] It is evident that the flow control schemes in related technologies suffer from poor control effectiveness. Summary of the Invention

[0006] This application aims to address the problem of poor regulation effect in flow regulation schemes in related technologies, and to provide an ecological flow regulation method, device, and terminal equipment.

[0007] To solve the above problems, this application is implemented as follows:

[0008] In a first aspect, this application provides an ecological flow regulation method applied to a pumped storage power station, the pumped storage power station comprising an upper reservoir and a lower reservoir, wherein the surface elevation of the upper reservoir is higher than that of the lower reservoir, the method comprising: Obtain natural water inflow data for the river channel where the upper reservoir is located, and obtain the minimum ecological flow of the river channel; Based on the natural water inflow data, the average daily natural inflow of the upper reservoir during the dry season, normal water season, and wet season is calculated respectively. Obtain the water level change curve of the upper reservoir on a typical operating day of the pumped storage power station, and determine the minimum head and typical head of the upper reservoir based on the water level change curve. The minimum head corresponds to the dead water level of the upper reservoir, and the typical head is the arithmetic mean of the head corresponding to the dead water level and the head corresponding to the normal storage level of the upper reservoir. Based on the typical water head and the average daily natural inflow corresponding to different water periods, the required flow area of ​​the ecological flow pipe under different water periods is calculated respectively. Based on the required flow area of ​​the ecological flow pipe under different water periods, M flow pipes with different orifice diameters are designed, where M is an integer greater than 1. Based on the measured natural inflow of the previous day or the hydrological forecast for the day, determine the natural inflow of the day, and based on the natural inflow of the day, calculate the target flow area required for the ecological flow pipe. Based on the target flow area, a target flow tube is determined from the M flow tubes, and the valve opening of the flow valve of the target flow tube is adjusted based on the target flow area.

[0009] Secondly, this application provides an ecological flow regulation device applied to a pumped storage power station, the pumped storage power station including an upper reservoir and a lower reservoir, the surface elevation of the upper reservoir being higher than the surface elevation of the lower reservoir, the device comprising: The acquisition module is used to acquire natural water inflow process data of the river channel where the upper reservoir is located, and to acquire the minimum ecological flow of the river channel; The first calculation module is used to calculate the average daily natural inflow of the upper reservoir during the dry season, normal season and wet season based on the natural water inflow process data. The determination module is used to obtain the water level change curve of the upper reservoir on a typical operating day of the pumped storage power station, and determine the minimum water head and typical water head of the upper reservoir based on the water level change curve. The minimum water head corresponds to the dead water level of the upper reservoir, and the typical water head is the arithmetic mean of the water head corresponding to the dead water level and the water head corresponding to the normal storage level of the upper reservoir. The second calculation module is used to calculate the required flow area of ​​the ecological flow pipe under different water periods based on the typical water head and the average daily natural inflow corresponding to different water periods. The design module is used to design M flow pipes with different orifice diameters based on the required flow area of ​​the ecological flow pipes under different water periods, where M is an integer greater than 1; The third calculation module is used to determine the natural inflow of the day based on the measured natural inflow of the previous day or the hydrological forecast of the day, and to calculate the target flow area required for the ecological flow pipe based on the natural inflow of the day. An adjustment module is used to determine a target flow tube from the M flow tubes based on the target flow area, and to adjust the valve opening of the flow valve of the target flow tube based on the target flow area.

[0010] Thirdly, this application provides a terminal device including a processor and a memory, wherein the memory stores a program or instructions executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0011] Fourthly, this application provides a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0012] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the steps of the method described in the first aspect.

[0013] In a sixth aspect, this application provides a computer program product stored in a storage medium, which is executed by at least one processor to perform the steps of the method described in the first aspect.

[0014] Compared with existing technologies, this application has the following advantages: Designing flow pipes with different orifice diameters for different water periods allows for differentiated configuration of ecological discharge capacity during these periods. This eliminates the need for frequent valve adjustments based on daily water head and separate centralized replenishment / discharge, significantly reducing equipment operation frequency and maintenance costs. Furthermore, it ensures the orderly discharge of natural inflows, prevents ineffective water storage in the reservoir from encroaching on regulating capacity, and safeguards the daily regulating operation safety of the power station. By using the river's ecological flow as the baseline constraint throughout, it reduces the impact of unstable reservoir discharges, maintains stable basic ecological hydrological conditions in the downstream river channel, and achieves synergistic adaptation between normal scheduling of the pumped storage power station, efficient reservoir utilization, and river ecological protection, thereby improving the regulation effect of ecological flow. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic flowchart of an embodiment of the ecological flow regulation method provided in this application; Figure 2 This is a schematic diagram of the structure of a multi-pore ecological flow pipe provided in one embodiment of this application; Figure 3 This is a comparison chart of the total daily discharge flow rate between the traditional discharge scheme and the discharge scheme of this application; Figure 4 This is a schematic diagram of the structure of an ecological flow regulation device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] The terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses. Additionally, the use of "and / or" in this application indicates at least one of the connected objects, such as A and / or B and / or C, representing seven possibilities: including A alone, B alone, C alone, and the presence of both A and B, both B and C, both A and C, and the presence of A, B, and C.

[0019] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0020] This application provides an ecological flow regulation method that can be applied to a pumped storage power station, which includes an upper reservoir and a lower reservoir, wherein the surface elevation of the upper reservoir is higher than that of the lower reservoir.

[0021] Before a pumped storage power station is put into operation, initial water storage must be completed. This can be achieved by raising the water levels of both the upper and lower reservoirs above the dead water level through natural water inflow, construction diversion facilities, or a dedicated water replenishment system. Additionally, the water level of one of the upper or lower reservoirs should be raised to near the normal water level to ensure that the pumped storage power station has complete daily regulation capabilities.

[0022] See Figure 1 , Figure 1 This is a schematic flowchart of an ecological flow regulation method provided in an embodiment of this application. Figure 1 The ecological flow regulation method shown can be executed by terminal devices such as mobile phones and computers.

[0023] like Figure 1 As shown, the ecological flow regulation method provided in this application may include the following steps: Step 101: Obtain the natural inflow process data of the river channel where the upper reservoir is located, and obtain the minimum ecological flow of the river channel.

[0024] The aforementioned natural inflow process data can be understood as the process of the inflow rate at the reservoir dam site under natural conditions changing over time. It is usually expressed in the form of a daily average flow series, and the time scale covers at least one complete hydrological year.

[0025] In some embodiments, the natural inflow process data of the river channel where the upper reservoir is located can be obtained based on historical daily average flow data collected from hydrological stations near the upper reservoir dam site.

[0026] In some embodiments, a hydrological model can be constructed based on data such as the digital elevation model of the basin above the dam site, land use type, and soil properties; and long-sequence daily rainfall data can be used as input to the hydrological model to simulate and generate the daily runoff process at the dam site, thereby realizing the acquisition of natural inflow process data of the river channel where the upper reservoir is located.

[0027] The aforementioned minimum ecological flow can be understood as the minimum flow threshold required to maintain the basic ecological function of the downstream river channel without damage.

[0028] In some embodiments, habitat simulation can be used to determine the minimum ecological flow. Specifically, by establishing the relationship between physical parameters such as water depth, flow velocity, and sediment at typical cross-sections of downstream rivers and the habitat suitability index of the target species, a hydraulic model is used to calculate the weighted available area under different flow rates, and the flow rate corresponding to the maximum weighted available area can be taken as the minimum ecological flow.

[0029] In some embodiments, 10% to 30% of the multi-year average flow can be used as the minimum ecological flow. The specific percentage is determined based on the ecological sensitivity of the river channel.

[0030] Step 102: Based on the natural water inflow data, calculate the average daily natural inflow of the upper reservoir during the dry season, normal water season, and wet season.

[0031] In some embodiments, the monthly average flow rate of each month in the natural water flow process data can be calculated using the month as the statistical unit; the monthly average flow rates of all months are sorted from largest to smallest; the top 25% to 35% of the months with the largest flow rate are taken as the high-water season; the bottom 25% to 35% of the months with the smallest flow rate are taken as the low-water season; and the remaining months are the normal-water season.

[0032] In some embodiments, all daily flow values ​​in the natural water inflow process data can be sorted from largest to smallest to plot a flow duration curve; periods exceeding 1.5 times the annual average flow are defined as the wet season; periods below 0.5 times the annual average flow are defined as the dry season; and periods in between are defined as the normal season.

[0033] In some embodiments, after determining the specific dates included in each water period, the average daily natural inflow for different water periods can be calculated based on the following formula:

[0034] In the formula, for Average daily natural inflow during the flood season; This indicates the type of water season, with values ​​including dry season, normal water season, and wet season. for The set of all dates included in the water season; for Total number of days in; For the first The natural inflow of water into the reservoir.

[0035] The average daily natural inflow during the dry season can be calculated using the above method. Average daily natural inflow during the normal water period and the average daily natural inflow during the high-water season .

[0036] Step 103: Obtain the water level change curve of the upper reservoir on a typical operating day of the pumped storage power station, and determine the minimum head and typical head of the upper reservoir based on the water level change curve.

[0037] Wherein, the minimum water head corresponds to the dead water level of the upper reservoir, and the typical water head is the arithmetic mean of the water head corresponding to the dead water level and the water head corresponding to the normal storage level of the upper reservoir.

[0038] The aforementioned typical operating day can be understood as the standard operating mode of a pumped storage power station under normal dispatch conditions. By determining the minimum head and typical head of the upper reservoir based on the water level change curve of the typical operating day, the interference of special operating conditions on the ecological flow regulation method provided in this application can be reduced.

[0039] In some embodiments, the average water level change process over 10 or more consecutive working days within each water period can be taken as the water level change curve for a typical operating day of that water period.

[0040] The aforementioned minimum head corresponds to the dead water level of the reservoir, which can be understood as the lowest operating water level allowed for a pumped storage power station during normal operation.

[0041] The aforementioned normal storage level can be understood as the highest water level that the reservoir is allowed to reach under normal operating conditions to meet its designed beneficial functions. For the upper reservoir of the pumped storage power station in this application, the normal storage level corresponds to the maximum head and the maximum regulating capacity.

[0042] The reservoir capacity between the normal water level and the dead water level can be called the regulating capacity or effective capacity, which is the water storage space used by pumped storage power stations for pumping or power generation.

[0043] In some embodiments, a typical head can be calculated based on the following formula:

[0044] In the formula, Typical water head, This is the minimum water head, which is the water head corresponding to the dead water level. This represents the head corresponding to the normal water storage level.

[0045] Step 104: Based on the typical water head and the average daily natural inflow corresponding to different water periods, calculate the required flow area of ​​the ecological flow pipe under different water periods.

[0046] In this embodiment, the required flow area of ​​the ecological flow pipe under different water periods can be calculated based on the following formula:

[0047] In the formula, for The required flow area for ecological flow pipes during the flood season; for Average daily natural inflow during the flood season; This is the flow coefficient, with a value ranging from 0.65 to 0.75; The acceleration due to gravity can be taken as 9.81 m / s². This is a typical water head.

[0048] The required flow area of ​​the ecological flow pipe during the dry season can be calculated using the methods described above. The required flow area of ​​the ecological flow pipe during the normal water period And the required flow area for ecological flow pipes during the high-water season. .

[0049] Step 105: Based on the required flow area of ​​the ecological flow pipe under different water periods, design M flow pipes with different orifice diameters, where M is an integer greater than 1.

[0050] In this embodiment, the required flow area for each water period can be determined. , , This can be transformed into M flow pipes with different orifice diameters that are feasible for engineering purposes, and each flow pipe can be equipped with a corresponding flow valve, thereby forming an ecological release system that can adapt to the changes in flow during the dry, normal, and wet seasons.

[0051] In some embodiments, for A bypass pipe can be designed for the dry season; for A bypass pipe can be designed for the normal water level period; for It is possible to design a main pipeline for the high-water season.

[0052] It is understandable that the bypass pipe during the dry season, the bypass pipe during the normal water season, and the main pipe during the wet season can be a single pipe or a collection of multiple pipes; no specific restrictions are made here.

[0053] In some embodiments, designing M flow pipes with different orifice diameters based on the required flow area of ​​the ecological flow pipe under different water periods includes: Verify whether the discharge flow rate of the flow area corresponding to the target water period is greater than or equal to the minimum ecological flow rate under the minimum water head, wherein the target water period is any one of the dry season, the normal water period, and the wet season; If the discharge capacity of the flow area corresponding to the target water period is less than the minimum ecological flow, then the flow area of ​​the target water period is recalculated based on the minimum head and the minimum ecological flow. Based on the recalculated flow area, the final flow area required for the ecological flow pipe under different water periods is determined, and based on the final flow area under different water periods, M flow pipes with different orifice diameters are designed.

[0054] In this embodiment, by verifying whether the discharge flow of the flow area corresponding to the target water period is greater than or equal to the minimum ecological flow under the minimum head, and when the discharge flow of the flow area corresponding to the target water period is less than the minimum ecological flow, the flow area of ​​the target water period is recalculated based on the minimum head and the minimum ecological flow. This ensures that the discharge flow at any water level and at any time is not lower than the minimum ecological flow, thus fundamentally protecting the ecological base flow.

[0055] In some embodiments, the flow area for the target water period can be recalculated based on the following formula:

[0056] In the formula, Minimum head The leakage flow can be verified. Is it greater than or equal to the minimum ecological flow? ;like Then To constrain the re-iterative calculation of the flow area for the target water period.

[0057] In some embodiments, this application also provides a method such as Figure 2 The ecological flow pipe shown includes: inlet section 1, dry season bypass pipe 2, normal water season bypass pipe 3, outlet section 4, flow valve 5, and wet season main pipe 6.

[0058] The inlet section 1 is connected to the upper reservoir, and the outlet section 4 is connected to the downstream of the river, so that the upper reservoir can flow to the downstream of the river through the ecological flow pipe, thereby meeting the minimum ecological flow of the river.

[0059] Step 106: Based on the measured natural inflow of the previous day or the hydrological forecast for the day, determine the natural inflow of the day, and based on the natural inflow of the day, calculate the target flow area required for the ecological flow pipe.

[0060] In some embodiments, the hydrological forecast for the day can be obtained based on the hydrological forecasting system of the pumped storage power station, thereby determining the natural inflow for the day; alternatively, the natural inflow measured the previous day can be used as the natural inflow for the day.

[0061] Once the natural inflow rate for the day is determined, the target flow area required for the ecological flow pipe can be calculated based on the natural inflow rate for the day.

[0062] In some embodiments, the target flow area can be calculated based on the following formula:

[0063] In the formula, The target flow area; This represents the natural inflow volume for the day. This is the flow coefficient, with a value ranging from 0.65 to 0.75; The acceleration due to gravity can be taken as 9.81 m / s². This is a typical water head.

[0064] Step 107: Based on the target flow area, determine the target flow tube from the M flow tubes, and adjust the valve opening of the flow valve of the target flow tube based on the target flow area.

[0065] In this embodiment, the target flow area can be compared with the flow area required for each water period. , , By comparison, the flow tube corresponding to the flow area that is closest to the target flow area is determined as the target flow tube.

[0066] Specifically, when the target flow area and the flow area When approaching, the flow area can be... The corresponding bypass pipe during the dry season is determined as the target flow pipe; for example, when the target flow area and the flow area When approaching, the flow area can be... The corresponding bypass pipe during the normal water period is determined as the target flow pipe; for example, when the target flow area and the flow area When approaching, the flow area can be... The corresponding main pipe during the high-water season is designated as the target flow pipe.

[0067] In some embodiments, the valve opening of the flow valve of the target flow pipe can be determined based on the ratio of the target flow area to the maximum flow area of ​​the target flow pipe, so as to ensure that the daily discharge volume is relatively stable and the total discharge volume is equal to the total inflow volume, avoiding frequent adjustments to the valve opening of the flow valve and effectively improving the regulation effect of ecological flow.

[0068] In some embodiments, the flow valve described above may be an electrically operated flow control valve.

[0069] like Figure 3 As shown, compared with the traditional discharge scheme, the ecological flow control method provided in this application can ensure that the daily discharge volume is relatively stable and the total discharge volume is equal to the total inflow volume, avoiding frequent adjustments to the valve opening of the flow valve and effectively improving the control effect of ecological flow.

[0070] Moreover, by adopting the ecological flow regulation method provided in this application, sudden high flow caused by concentrated replenishment and discharge can be avoided, significantly reducing downstream ecological disturbance.

[0071] In some embodiments, after adjusting the valve opening of the flow valve of the target flow pipe based on the target flow area, the method further includes: When the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than the normal storage level, the valve opening of the flow valve is kept constant. When the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than or equal to the dead water level, the valve opening of the flow valve is reduced.

[0072] In this embodiment, when the upper reservoir does not reach the normal water level, the valve opening of the flow valve is kept constant, which can avoid frequent valve operation, reduce equipment wear and maintenance difficulty; when the water level of the upper reservoir is lower than or equal to the dead water level, the valve opening of the flow valve is reduced, which can prevent excessive discharge of water stored in the reservoir area, effectively taking into account the absorption of natural water, the rational use of reservoir capacity and the stability of ecological water supply in the downstream river.

[0073] In some embodiments, reducing the valve opening of the flow valve includes: Based on the minimum head and the minimum ecological flow, the minimum flow area corresponding to the minimum ecological flow is calculated; Reduce the valve opening of the flow valve to the valve opening corresponding to the minimum flow area.

[0074] In this embodiment, the minimum flow area is calculated by using the minimum head and minimum ecological flow as boundary conditions, and the corresponding valve opening is matched for limit control. That is, the most unfavorable discharge condition of the reservoir is used as a constraint to ensure that even if the discharge scale is reduced under the condition of high water level and full storage, the minimum ecological base flow requirement of the downstream can still be stably met, avoiding the risk of excessive water discharge and waste and insufficient ecological flow, and improving the safety and adaptability of the power station's ecological discharge.

[0075] The ecological discharge pipe diameter design according to this application involves determining the flow area for dry season, normal water season, and wet season, and designing multiple flow pipes with different orifice diameters, such as main pipes and bypass pipes, with each pipe equipped with a flow valve. Moreover, considering the adjustment range of the flow valves, this design can cover most operational scenarios from the minimum ecological flow to the average daily inflow during the wet season.

[0076] During operation, the valve opening of the target flow pipe can be set based on the daily natural inflow. It is understood that once the valve opening is set within the same water period, it does not need to be adjusted again, and the discharge flow from the ecological discharge pipe can effectively match the daily natural inflow. Verification by example shows that the daily average discharge calculated using the method in this application deviates by approximately 10% from the daily average natural inflow. For most pumped storage power stations, this deviation represents a very small proportion of the regulating reservoir capacity, typically less than 0.5%, and can be ignored, not affecting the station's normal daily regulating capacity or reservoir safety.

[0077] In this application, flow pipes with different orifice diameters are designed for different water periods, which enables differentiated configuration of ecological discharge capacity for different water periods. This eliminates the need for frequent valve adjustments based on daily water head, significantly reducing equipment operation frequency and maintenance losses. Moreover, this ensures the orderly discharge of natural inflow, avoids ineffective water storage in the reservoir area from crowding out the regulating capacity, and takes into account the daily regulating operation safety of the power station. The entire process is constrained by the ecological flow of the river, stably maintaining the basic ecological hydrological conditions of the downstream river, achieving a synergistic adaptation between normal scheduling of the pumped storage power station, efficient use of reservoir capacity, and ecological protection of the river, thereby improving the regulation effect of ecological flow.

[0078] See Figure 4 , Figure 4 This is a schematic diagram of the structure of an ecological flow regulation device provided in one embodiment of this application. Figure 4 As shown, the device 400 is applied to a pumped storage power station, which includes an upper reservoir and a lower reservoir. The surface elevation of the upper reservoir is higher than that of the lower reservoir. The device 400 includes... The acquisition module 401 is used to acquire natural water inflow process data of the river channel where the upper reservoir is located, and to acquire the minimum ecological flow of the river channel. The first calculation module 402 is used to calculate the average daily natural inflow of the upper reservoir during the dry season, normal season and wet season based on the natural water inflow process data. The determination module 403 is used to obtain the water level change curve of the upper reservoir on a typical operating day of the pumped storage power station, and determine the minimum water head and typical water head of the upper reservoir based on the water level change curve. The minimum water head corresponds to the dead water level of the upper reservoir, and the typical water head is the arithmetic mean of the water head corresponding to the dead water level and the water head corresponding to the normal storage level of the upper reservoir. The second calculation module 404 is used to calculate the required flow area of ​​the ecological flow pipe under different water periods based on the typical water head and the average daily natural inflow corresponding to different water periods. Design module 405 is used to design M flow pipes with different orifice diameters based on the required flow area of ​​the ecological flow pipes under different water periods, where M is an integer greater than 1; The third calculation module 406 is used to determine the natural inflow of the day based on the measured natural inflow of the previous day or the hydrological forecast of the day, and to calculate the target flow area required for the ecological flow pipe based on the natural inflow of the day. The adjustment module 407 is used to determine the target flow tube from the M flow tubes based on the target flow area, and adjust the valve opening of the flow valve of the target flow tube based on the target flow area.

[0079] Optionally, the design module 405 is specifically used for: Verify whether the discharge flow rate of the flow area corresponding to the target water period is greater than or equal to the minimum ecological flow rate under the minimum water head, wherein the target water period is any one of the dry season, the normal water period, and the wet season; If the discharge capacity of the flow area corresponding to the target water period is less than the minimum ecological flow, then the flow area of ​​the target water period is recalculated based on the minimum head and the minimum ecological flow. Based on the recalculated flow area, the final flow area required for the ecological flow pipe under different water periods is determined, and based on the final flow area under different water periods, M flow pipes with different orifice diameters are designed.

[0080] Optionally, the device 400 further includes: The maintenance module is used to maintain the valve opening of the flow valve unchanged when the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than the normal storage level. The reduction module is used to reduce the valve opening of the flow valve when the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than or equal to the dead water level.

[0081] Optionally, the reduction module is specifically used for: Based on the minimum head and the minimum ecological flow, the minimum flow area corresponding to the minimum ecological flow is calculated; Reduce the valve opening of the flow valve to the valve opening corresponding to the minimum flow area.

[0082] The ecological flow regulation device can achieve the functions described in this application. Figure 1 The various processes in the method embodiments, and the ways to achieve the same beneficial effects, will not be repeated here to avoid repetition.

[0083] like Figure 5As shown, this application also provides a terminal device, including a processor 501 and a memory 502. The memory 502 stores a program or instructions that can run on the processor 501. When the program or instructions are executed by the processor 501, they implement the various steps of the above-described ecological flow regulation method embodiments and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0084] It should be noted that the terminal device in this application can be a terminal or other devices besides a terminal. For example, the terminal device can be a mobile phone, tablet computer, laptop computer, etc., and this application does not make any specific limitation.

[0085] This application also provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the various processes of the above-described ecological flow regulation method embodiments and achieve the same technical effect. To avoid repetition, these will not be described again here.

[0086] The processor is the processor in the terminal device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory). Only memory (ROM), random access memory (RAM), magnetic disks or optical disks, etc.

[0087] This application also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described ecological flow regulation method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0088] It should be understood that the chip mentioned in this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0089] This application provides a computer program product that is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described ecological flow regulation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0090] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0091] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as a read-only memory). The device includes a number of instructions in a ROM (random access memory), RAM (magnetic disk), or optical disk to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0092] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An ecological flow regulation method, characterized in that, The method, applied to pumped-storage power stations, which include an upper reservoir and a lower reservoir, wherein the surface elevation of the upper reservoir is higher than that of the lower reservoir, comprises: Obtain natural water inflow data for the river channel where the upper reservoir is located, and obtain the minimum ecological flow of the river channel; Based on the natural water inflow data, the average daily natural inflow of the upper reservoir during the dry season, normal water season, and wet season is calculated respectively. Obtain the water level change curve of the upper reservoir on a typical operating day of the pumped storage power station, and determine the minimum head and typical head of the upper reservoir based on the water level change curve. The minimum head corresponds to the dead water level of the upper reservoir, and the typical head is the arithmetic mean of the head corresponding to the dead water level and the head corresponding to the normal storage level of the upper reservoir. Based on the typical water head and the average daily natural inflow corresponding to different water periods, the required flow area of ​​the ecological flow pipe under different water periods is calculated respectively. Based on the required flow area of ​​the ecological flow pipe under different water periods, M flow pipes with different orifice diameters are designed, where M is an integer greater than 1. Based on the measured natural inflow of the previous day or the hydrological forecast for the day, determine the natural inflow of the day, and based on the natural inflow of the day, calculate the target flow area required for the ecological flow pipe. Based on the target flow area, a target flow tube is determined from the M flow tubes, and the valve opening of the flow valve of the target flow tube is adjusted based on the target flow area.

2. The method according to claim 1, characterized in that, Based on the required flow area of ​​the ecological flow pipe under different water periods, M flow pipes with different orifice diameters are designed, including: Verify whether the discharge flow rate of the flow area corresponding to the target water period is greater than or equal to the minimum ecological flow rate under the minimum water head, wherein the target water period is any one of the dry season, the normal water period, and the wet season; If the discharge capacity of the flow area corresponding to the target water period is less than the minimum ecological flow, then the flow area of ​​the target water period is recalculated based on the minimum head and the minimum ecological flow. Based on the recalculated flow area, the final flow area required for the ecological flow pipe under different water periods is determined, and based on the final flow area under different water periods, M flow pipes with different orifice diameters are designed.

3. The method according to claim 1 or 2, characterized in that, After adjusting the valve opening of the flow valve of the target flow pipe based on the target flow area, the method further includes: When the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than the normal storage level, the valve opening of the flow valve is kept constant. When the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than or equal to the dead water level, the valve opening of the flow valve is reduced.

4. The method according to claim 3, characterized in that, The reduction of the valve opening of the flow valve includes: Based on the minimum head and the minimum ecological flow, the minimum flow area corresponding to the minimum ecological flow is calculated; Reduce the valve opening of the flow valve to the valve opening corresponding to the minimum flow area.

5. An ecological flow regulation device, characterized in that, An apparatus for use in pumped-storage power stations, the pumped-storage power station comprising an upper reservoir and a lower reservoir, wherein the surface elevation of the upper reservoir is higher than that of the lower reservoir, the apparatus comprising: The acquisition module is used to acquire natural water inflow process data of the river channel where the upper reservoir is located, and to acquire the minimum ecological flow of the river channel; The first calculation module is used to calculate the average daily natural inflow of the upper reservoir during the dry season, normal season and wet season based on the natural water inflow process data. The determination module is used to obtain the water level change curve of the upper reservoir on a typical operating day of the pumped storage power station, and determine the minimum water head and typical water head of the upper reservoir based on the water level change curve. The minimum water head corresponds to the dead water level of the upper reservoir, and the typical water head is the arithmetic mean of the water head corresponding to the dead water level and the water head corresponding to the normal storage level of the upper reservoir. The second calculation module is used to calculate the required flow area of ​​the ecological flow pipe under different water periods based on the typical water head and the average daily natural inflow corresponding to different water periods. The design module is used to design M flow pipes with different orifice diameters based on the required flow area of ​​the ecological flow pipes under different water periods, where M is an integer greater than 1; The third calculation module is used to determine the natural inflow of the day based on the measured natural inflow of the previous day or the hydrological forecast of the day, and to calculate the target flow area required for the ecological flow pipe based on the natural inflow of the day. An adjustment module is used to determine a target flow tube from the M flow tubes based on the target flow area, and to adjust the valve opening of the flow valve of the target flow tube based on the target flow area.

6. The apparatus according to claim 5, characterized in that, The design module is specifically used for: Verify whether the discharge flow rate of the flow area corresponding to the target water period is greater than or equal to the minimum ecological flow rate under the minimum water head, wherein the target water period is any one of the dry season, the normal water period, and the wet season; If the discharge capacity of the flow area corresponding to the target water period is less than the minimum ecological flow, then the flow area of ​​the target water period is recalculated based on the minimum head and the minimum ecological flow. Based on the recalculated flow area, the final flow area required for the ecological flow pipe under different water periods is determined, and based on the final flow area under different water periods, M flow pipes with different orifice diameters are designed.

7. The apparatus according to claim 5 or 6, characterized in that, The device further includes: The maintenance module is used to maintain the valve opening of the flow valve unchanged when the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than the normal storage level. The reduction module is used to reduce the valve opening of the flow valve when the pumped storage power station is in pumping operation and the water level of the upper reservoir is lower than or equal to the dead water level.

8. The apparatus according to claim 7, characterized in that, The reduction module is specifically used for: Based on the minimum head and the minimum ecological flow, the minimum flow area corresponding to the minimum ecological flow is calculated; Reduce the valve opening of the flow valve to the valve opening corresponding to the minimum flow area.

9. A terminal device, characterized in that, It includes a processor and a memory, wherein the memory stores a program or instructions executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method as described in any one of claims 1 to 4.

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