Pumped storage site selection method, system, device and electronic equipment

Abstract

The application relates to the technical field of water conservancy facilities, and discloses a pumped storage power station site selection method, system, device and electronic equipment, the method comprising the following steps: acquiring a digital elevation model of a region to be selected, and generating a ridge line and a valley line based on the digital elevation model; determining a first elevation interval of upper reservoir site selection based on the ridge line and the valley line; identifying a plurality of upper reservoir sites in the first elevation interval, constructing a lower reservoir site selection region with each upper reservoir site as a center, and identifying a lower reservoir site in the lower reservoir site selection region; and combining the upper reservoir sites and the lower reservoir sites to form pumped storage power station site points. Compared with a traditional exhaustive method, the application can greatly reduce invalid calculation under the premise of ensuring site selection quality, and significantly improves the calculation efficiency of pumped storage power station site selection.

Description

Technical Field

[0001] This invention relates to the field of water conservancy facilities technology, specifically to pumped storage site selection methods, systems, devices, and electronic equipment. Background Technology

[0002] Existing technologies (such as patent applications CN202310529972.9 and CN202111300331.3) provide a method for automatically identifying reservoir dam sites and pumped storage station sites based on topographic spatial data, which can automatically identify potential sites over a large area.

[0003] However, the above method, primarily based on exhaustive trial-and-error, has two main shortcomings: First, it generates all possible dam sites along the river system and calculates reservoir capacity, but the vast majority of these sites lack engineering value, resulting in wasted computational resources. Second, it first independently identifies all reservoirs in the region and then performs a global exhaustive matching process, leading to the invalid screening of many downstream reservoirs due to the lack of suitable upstream reservoirs nearby, and the elimination of most combinations due to insufficient head or poor matching. Therefore, it is necessary to optimize the site selection method to improve computational efficiency while ensuring site selection quality. Summary of the Invention

[0004] This invention provides a pumped storage site selection method, system, device, and electronic equipment to solve the problems of numerous invalid dam site calculations and invalid reservoir pairings in existing pumped storage site selection methods.

[0005] In a first aspect, the present invention provides a method for selecting a pumped storage site, the method comprising: Obtain the digital elevation model of the area to be selected, and generate ridge lines and valley lines based on the digital elevation model; The first elevation interval for selecting the site of the upper reservoir was determined based on the ridgeline and valleyline. Multiple upper reservoir sites are identified within the first elevation interval. A lower reservoir site selection area is constructed with each upper reservoir site as the center, and lower reservoir sites are identified within the lower reservoir site selection area. The upper reservoir site and the lower reservoir site are combined to form the pumped storage station site.

[0006] This invention provides a pumped storage site selection method that introduces ridgelines and valley lines as topographic constraints. First, based on these constraints, a first elevation interval for upper reservoir site selection is determined. Then, upper reservoir sites are identified within this interval. Subsequently, a lower reservoir site selection area is constructed oriented around each upper reservoir site, and lower reservoir sites are identified. Finally, these are combined to form the site selection. Compared to the traditional exhaustive method, the amount of invalid calculations is reduced by approximately 80%, calculation time is reduced by approximately 66%, and overall work time is reduced by approximately 61%. Furthermore, the site selection results are completely consistent. This method significantly reduces invalid calculations while ensuring site selection quality, thus significantly improving the computational efficiency of pumped storage site selection. It solves the problems of numerous invalid dam site calculations and invalid reservoir pairings in existing pumped storage site selection methods.

[0007] In one alternative implementation, determining the first elevation interval for the upper reservoir site selection based on ridgelines and valley lines includes: Extract the highest elevation from the digital elevation model and use it as the first elevation upper limit of the first elevation interval. Identify closed contour lines associated with valley lines and use the lowest elevation among the closed contour lines as the lower limit of the terrain. The sum of the lowest elevation of the digital elevation model and the preset minimum allowable head is used as the economic lower limit, and the larger value between the topographic lower limit and the economic lower limit is used as the first elevation lower limit of the first elevation interval. The first elevation range for selecting the site of the upper reservoir is determined based on the first upper elevation limit and the first lower elevation limit.

[0008] In the above technical solution, the highest elevation of the digital elevation model is extracted as the upper limit of the interval, and the larger of the lowest elevation of the closed contour line associated with the valley line (topographic lower limit) and the sum of the lowest elevation and the preset minimum allowable head (economic lower limit) is used as the lower limit of the interval. This limits the search range of the upper reservoir to the elevation interval that simultaneously meets the conditions for reservoir formation and the economic head requirement. It avoids searching in invalid elevation areas that are too low or too high, cannot form a reservoir, or are economically unfeasible, thus reducing the amount of calculation required for subsequent identification of the upper reservoir site.

[0009] In one alternative implementation, multiple upper reservoir sites are identified within a first elevation interval, including: Each elevation value within the first elevation interval is taken as the elevation to be processed, and the contour lines corresponding to each elevation to be processed are extracted. Using the ridgeline as a dividing line, the contour lines are divided into multiple outlines; Determine whether each contour line intersects with the valley line; if they do not intersect, delete the corresponding contour line. The remaining outlines are merged to obtain multiple reservoir site selection areas; Within each reservoir site selection area, dam lines are determined, and reservoir sites that meet the reservoir capacity requirements are selected based on the dam lines.

[0010] In the above technical solution, each elevation value within the first elevation interval is used as the elevation to be processed, and contour lines are extracted. These contour lines are then divided into multiple outlines using ridgelines as dividing lines. Intersection of these outlines with valley lines is then used to remove invalid outlines that cannot form a water catchment area. The remaining outlines are merged to obtain the upper reservoir site selection area. Finally, the dam line is determined within each site selection area, and upper reservoir sites that meet the reservoir capacity requirements are selected. This method uses ridgelines and valley lines to divide and filter contour lines, eliminating a large number of invalid terrain areas that cannot form an effective reservoir basin before the dam line is determined, thus reducing the computational workload of subsequent dam line calculations and reservoir capacity selection.

[0011] In one alternative implementation, merging the retained contour lines includes: When two contour lines intersect the same ridgeline, the straight-line distance between the intersection points is less than a preset value, and the valley lines corresponding to the two contour lines are connected to each other, the two contour lines are merged.

[0012] In the above technical solution, by identifying the conditions that two contour lines intersect with the same ridge line and the distance between the intersection points is less than a preset value, and the valley lines corresponding to the two contour lines are interconnected, the contour lines that were originally cut off by the ridge line but actually belong to the same valley terrain are merged into a complete upper reservoir site selection area. This avoids the omission of high-quality reservoir sites due to fragmented terrain and improves the integrity and accuracy of upper reservoir site selection.

[0013] In one alternative implementation, determining the dam line within each upper reservoir site selection area includes: Multiple contour points are generated along the contour line, valley line points are generated along the valley line, and the contour space vector is constructed by traversing the contour points starting from the intersection of the contour line and the valley line. Construct auxiliary vectors corresponding to each contour space vector, and calculate the directed angle from the contour space vector to the auxiliary vector; Based on the comparison results between the directional angle and the preset angle threshold, the contour points that meet the conditions are selected. Connect the contour points located on both sides of the valley line to form multiple lines, and select the lines whose length is less than the preset dam length and whose relative height is less than the preset dam height as the dam line.

[0014] In the above technical solution, points are discretized along the contour line and valley line to construct a contour space vector and corresponding auxiliary vectors. Contour points conforming to the terrain's transition from open to narrowing characteristics are selected by comparing directed angles with preset thresholds. Then, the selected points on both sides of the valley line are connected, and the line whose length is less than the preset dam length and whose relative height is less than the preset dam height is selected as the dam line. This method transforms the dam line selection problem into a judgment of vector angles and geometric constraints, achieving automatic identification of high-quality dam sites and avoiding invalid calculations at locations where the dam length or height exceeds the standard.

[0015] In one optional implementation, a downstream reservoir site selection area is constructed centered on each upstream reservoir site, and downstream reservoir sites are identified within the downstream reservoir site selection area, including: Calculate the second elevation interval for the reservoir site selection. The lower limit of the second elevation interval is the larger of the following two values: the lowest elevation of the site selection area and the difference between the upper reservoir water level and the maximum allowable head. The upper limit of the second elevation interval is the difference between the upper reservoir water level and the minimum allowable head. The system iterates from the upper limit of the second elevation to the lower limit of the second elevation, calculates the site selection radius corresponding to the current elevation based on the preset allowable distance-to-elevation ratio, and constructs a buffer zone with the reservoir site as the center and the site selection radius as the radius. Select contour lines that intersect with the buffer zone as candidate contour lines, construct the reservoir site selection area based on the candidate contour lines, and identify the reservoir site within the reservoir site selection area.

[0016] In the above technical solution, a second elevation interval for selecting the lower reservoir is constructed by calculating the larger of the lowest elevation of the area to be selected and the difference between the upper reservoir water level and the maximum allowable head, and the difference between the upper reservoir water level and the minimum allowable head, as the upper limit. Then, based on a preset allowable distance-to-elevation ratio, the selection radius corresponding to each elevation is calculated, and a buffer zone is constructed centered on the upper reservoir site. Contour lines intersecting this buffer zone are used as candidate contour lines to construct the lower reservoir site selection area. This method uses the upper reservoir site as a benchmark and limits the search range of the lower reservoir to a local area through elevation constraints and distance-to-elevation ratio constraints, avoiding exhaustive searching of the lower reservoir across the entire region and significantly reducing invalid reservoir site identification calculations.

[0017] In one optional implementation, identifying the reservoir site within the selected reservoir site area includes: The same steps as those used to identify multiple upper reservoir sites were employed to identify the lower reservoir sites.

[0018] In the above technical solution, the same steps as those for identifying the upper reservoir site are reused to identify the lower reservoir site, eliminating the need to design a separate site selection algorithm for the lower reservoir. This reduces the complexity of the method implementation while ensuring consistent identification results.

[0019] Secondly, the present invention provides a pumped storage site selection system, the system comprising: The main control server is used to acquire the digital elevation model of the area to be selected, and generate ridge lines and valley lines based on the digital elevation model; and determine the first elevation interval for the upper reservoir site selection based on the ridge lines and valley lines. Multiple computing servers are connected to the main control server and run in parallel to identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify lower reservoir sites within the lower reservoir site selection area. The main control server is also used to combine the upper reservoir site and the lower reservoir site to form pumped storage station sites.

[0020] Thirdly, the present invention provides a pumped storage site selection device, the device comprising: The data acquisition module is used to acquire the digital elevation model of the area to be selected and to generate ridge lines and valley lines based on the digital elevation model. The elevation interval determination module is used to determine the first elevation interval for reservoir site selection based on the ridgeline and valleyline. The reservoir site identification module is used to identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify the lower reservoir site within the lower reservoir site selection area; The reservoir site combination module is used to combine the upper reservoir site and the lower reservoir site to form a pumped storage station site.

[0021] Fourthly, the present invention provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the pumped storage site selection method of the first aspect or any corresponding embodiment described above.

[0022] Fifthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the pumped storage site selection method of the first aspect or any corresponding embodiment described above.

[0023] In a sixth aspect, the present invention provides a computer program product, including computer instructions for causing a computer to execute the pumped storage site selection method of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an application scenario according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the first process of the pumped storage site selection method according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the second process of the pumped storage site selection method according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the outline of the pumped storage site selection method according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the process of merging contour lines to form a new contour line in the pumped storage site selection method according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the construction of contour space vector and auxiliary vector in the pumped storage site selection method according to an embodiment of the present invention; Figure 7 This is a structural block diagram of a pumped storage site selection device according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It is understood that before using the technical solutions disclosed in the various embodiments of the present invention, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in the present invention and their authorization should be obtained in accordance with relevant laws and regulations through appropriate means.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] As an optional application scenario of this invention, such as Figure 1 As shown, this invention provides a pumped storage site selection system, which includes a main control server and multiple computing servers. Wherein: The main control server is used to acquire the digital elevation model of the area to be selected, and generate ridge lines and valley lines based on the digital elevation model; and determine the first elevation interval for the upper reservoir site selection based on the ridge lines and valley lines.

[0030] Multiple computing servers are connected to the main control server and run in parallel to identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify lower reservoir sites within the lower reservoir site selection area. The main control server is also used to combine the upper reservoir site and the lower reservoir site to form pumped storage station sites.

[0031] The specific workflow of this system includes: The main control server first acquires the digital elevation model of the area to be selected, and generates contour lines and all ridge and valley lines based on the model. Then, it calculates the elevation interval for the upper reservoir site selection, and dispatches each elevation within the interval as a calculation task to multiple computing servers, which perform the calculations in parallel to identify all upper reservoir sites. Subsequently, the main control server constructs the lower reservoir site selection area with each upper reservoir site as the center, and dispatches the identification tasks within the lower reservoir site selection area to multiple computing servers for parallel execution to identify potential lower reservoir sites. Finally, the main control server combines the upper and lower reservoir sites to form effective pumped storage station sites.

[0032] According to an embodiment of the present invention, a pumped storage site selection method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0033] This embodiment provides a pumped storage site selection method, which can be used in the above-mentioned pumped storage site selection system. Figure 2 This is a flowchart of a pumped storage site selection method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps: Step S201: Obtain the digital elevation model of the area to be selected, and generate ridge lines and valley lines based on the digital elevation model.

[0034] The proposed site area refers to the geographical area within which a pumped storage power station site selection evaluation needs to be conducted.

[0035] A Digital Elevation Model (DEM) is a digital representation of the Earth's surface elevation, that is, the elevation data of each point stored in raster (grid) form. The DEM is the basic input data, and all subsequent operations rely on it: generating contour lines from the DEM; extracting ridgelines and valley lines from the DEM; obtaining the highest and lowest elevations from the DEM; and extracting contour lines corresponding to specified elevations, etc.

[0036] A ridgeline is a line connecting the highest points extending outwards from the mountaintop in a terrain feature; it forms the framework of a watershed.

[0037] The valley line is the line connecting the lowest points extending from the mountaintop or hillside to the foot of the mountain in the terrain; it is the framework line of the water catchment line.

[0038] Specifically, after obtaining the digital elevation model of the area to be selected, the elevation relationship between each grid cell and its neighboring cells is analyzed to identify the lines connecting the highest local points in the terrain as ridge lines and the lines connecting the lowest local points as valley lines. Among them, the ridge lines are watershed feature lines with lower terrain on both sides, and the valley lines are water catchment feature lines with higher terrain on both sides. Together, they constitute the topographic framework of the area to be selected.

[0039] Step S202: Determine the first elevation interval for the upper reservoir site selection based on the ridgeline and valleyline.

[0040] Pumped storage power stations require two reservoirs: one at a higher elevation (upper reservoir) and one at a lower elevation (lower reservoir). During periods of low electricity demand, water is pumped from the lower reservoir to the upper reservoir for storage (energy storage); during periods of high electricity demand, water is released from the upper reservoir to the lower reservoir to generate electricity (energy release).

[0041] Among them, the upper reservoir refers to the reservoir in the pumped storage power station located at a higher elevation.

[0042] The first elevation interval refers to the elevation search range for the selection of the upper reservoir site.

[0043] Specifically, the first elevation range for determining the site selection of the upper reservoir based on the ridgeline and valleyline is defined by extracting the highest elevation of the area to be selected as the upper limit of the search, using the lowest elevation of the closed contour line associated with the valleyline as the lower limit of the landform, and using the more stringent of the landform reservoir conditions and economic head requirements as the lower limit of the search, thereby defining the elevation search range of the upper reservoir.

[0044] Step S203: Identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify lower reservoir sites within the lower reservoir site selection area.

[0045] Specifically, within the elevation range of the upper reservoir site selection, the control server dispatches each elevation as a calculation task to the computing server. For example, if the elevation range of the upper reservoir site selection is 400m to 500m, and assuming the contour interval of the contour lines is 1m, then there are 101 elevation values, which means there are 101 calculation tasks. Each elevation value is a calculation task, which is queued on the main control server. The main control server distributes the calculation tasks to the computing servers one by one. Once the computing server completes a calculation, it sends feedback to the main control server, which then distributes another task until all calculations are completed.

[0046] Each computing server uses the following method to obtain the reservoir address corresponding to the elevation value and returns the result to the main control server: After extracting the corresponding contour lines, the contour lines are divided into multiple outlines using ridge lines as dividing lines. The contours that intersect with the contours are then selected and merged using valley lines to obtain the upper reservoir site selection area. The upper reservoir sites are then selected by identifying the dam line and reservoir capacity conditions. Then, with each upper reservoir site as the center, the search range of the lower reservoir sites is delineated based on the allowable head and distance-to-height ratio constraints. Within this range, the lower reservoir sites are identified using the same method as the upper reservoir sites.

[0047] Step S204: Combine the upper reservoir site and the lower reservoir site to form a pumped storage station site.

[0048] Specifically, the identified upper reservoir sites and lower reservoir sites are associated one by one. Each upper reservoir site and its corresponding one or more lower reservoir sites form a candidate site combination. The combination is then screened based on preset head, distance-to-height ratio and reservoir capacity conditions. Finally, the upper reservoir site and lower reservoir site combination that meets the conditions is determined as the pumped storage site.

[0049] The pumped storage site selection method provided in this embodiment introduces ridgelines and valley lines as topographic constraints. First, based on these constraints, the first elevation interval for upper reservoir site selection is determined. Then, upper reservoir sites are identified within this interval. Subsequently, a lower reservoir site selection area is constructed oriented around each upper reservoir site, and lower reservoir sites are identified. Finally, these are combined to form the site selection. Compared to the traditional exhaustive method, the amount of invalid calculations is reduced by approximately 80%, calculation time is reduced by approximately 66%, and overall work time is reduced by approximately 61%. Furthermore, the site selection results are completely consistent. This method significantly reduces invalid calculations while ensuring site selection quality, thus significantly improving the computational efficiency of pumped storage site selection. It solves the problems of numerous invalid dam site calculations and invalid reservoir pairings in existing pumped storage site selection methods.

[0050] This embodiment provides a pumped storage site selection method, which can be used in the above-mentioned pumped storage site selection system. Figure 3 This is a flowchart of a pumped storage site selection method according to an embodiment of the present invention, such as... Figure 3 As shown, the process includes the following steps: Step S301: Obtain the digital elevation model of the area to be selected, and generate ridgelines and valley lines based on the digital elevation model. For details, please refer to [link to relevant documentation]. Figure 2 Step S201 of the illustrated embodiment will not be described again here.

[0051] Step S302: Determine the first elevation interval for the upper reservoir site selection based on the ridgeline and valleyline.

[0052] Specifically, step S302 includes: Step S3021: Extract the highest elevation of the digital elevation model and use the highest elevation as the first elevation upper limit of the first elevation interval.

[0053] Specifically, the first elevation limit = the upper limit elevation of the reservoir site selection = the highest elevation of the area to be selected.

[0054] Step S3022: Identify the closed contour lines associated with the valley line, and take the lowest elevation in the closed contour lines as the terrain lower limit; calculate the sum of the lowest elevation of the digital elevation model and the preset minimum allowable water head as the economic lower limit, and take the larger value between the terrain lower limit and the economic lower limit as the first elevation lower limit of the first elevation interval.

[0055] The first lower limit of elevation = max(the lowest elevation of the site to be selected + the minimum allowable head, and the lower limit of topography). It should be noted that the minimum allowable head is set in advance by technical personnel, taking into account the technical and economic requirements of the pump turbine. For example, when selecting a large pumped storage power station with a capacity of one million kilowatts, the minimum allowable head is generally 300m (power stations with a head lower than this are not economically viable). That is, the selected pumped storage stations must not have a head lower than this; otherwise, the technical or economic indicators will not meet the preset requirements.

[0056] Step S3023: Determine the first elevation range for the selection of the upper reservoir site based on the first upper elevation limit and the first lower elevation limit.

[0057] Specifically, based on the first upper elevation limit and the first lower elevation limit, the first elevation interval for selecting the upper reservoir site can be determined. Each elevation value in this interval represents a possible elevation layer to be processed, which is used to extract contour lines layer by layer and identify the upper reservoir site.

[0058] Step S303: Identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify lower reservoir sites within the lower reservoir site selection area.

[0059] Specifically, step S303 includes: Step S3031: Take each elevation value in the first elevation interval as the elevation to be processed, and extract the contour lines corresponding to each elevation to be processed.

[0060] Specifically, contour lines, when viewed from a plane, are composed of closed, irregularly shaped polysegments. Each circle represents the contour line of a mountain at that elevation, and these polysegments are independent of each other and not connected.

[0061] Step S3032: Using the ridgeline as the dividing line, divide the contour lines into multiple outlines; determine whether each outline intersects with the valley line; if they do not intersect, delete the corresponding outline.

[0062] Overlay all the ridgelines of the area to be selected, and use the ridgelines to divide the contour lines extracted above to form independent polylines, which are the outline lines.

[0063] like Figure 4As shown, taking a certain contour line (the solid line where the first type of intersection is located) as an example, this contour line is a closed contour line at a certain elevation. This mountain has 3 ridge lines and 1 valley line. The three ridge lines intersect the contour line at 3 points, which are called first type intersections (solid black dots). The valley line intersects the contour line at 1 point, which is called second type intersection (dashed dot). The first type intersections divide the contour line into three independent terrain outlines. There are no second type intersections on outlines 1 and 2 (i.e., they do not intersect with the valley line), so they are deleted. Outline 3 is retained.

[0064] Step S3033: Merge the remaining outlines to obtain multiple upper reservoir site selection areas.

[0065] In some optional implementations, step S3033 above includes: Step a: When two contour lines intersect with the same ridgeline, the straight-line distance between the intersection points is less than a preset value, and the valley lines corresponding to the two contour lines are connected to each other, then the two contour lines are merged.

[0066] Specifically, all contour lines are evaluated. If they meet the following conditions, they are merged; otherwise, the contour line is considered an independent contour line and does not need to be merged. It is then used as an independent database address in subsequent calculations.

[0067] The conditions are: two contour lines intersect by the same ridgeline, the straight-line distance between the intersection points is less than a certain value (which can be set to 500m), and the valley lines corresponding to the two contour lines can intersect.

[0068] For example, some valley terrains have mountain passes that divide the original complete and closed contour lines. However, if a secondary dam is built in this place, the pass can be connected and it can be used as the site for an upper reservoir.

[0069] If they intersect, the two contour lines are merged into one: connect the ridgeline to the intersection point of the two contour lines, and then connect that intersection point to the two contour lines to form a new contour line. For example, as shown... Figure 5 As shown, contour lines 1 and 2 intersect with the same ridgeline, and the two valley lines also intersect, indicating that the two contour lines are in the same valley. Therefore, the two contour lines are merged into one using the method described above to avoid omission.

[0070] Step S3034: Determine the dam line within each upper reservoir site selection area, and screen out upper reservoir sites that meet the reservoir capacity conditions based on the dam line.

[0071] Once all computational tasks are completed, the main control server assigns each upper reservoir site selection area as a computational task to the computational server. The computational server calculates and determines the dam line of the upper reservoir and returns the dam line results to the main control server. The computational server obtains the dam line of the selected upper reservoir site area according to the sub-step of step S3034 below and returns the dam line to the main control server.

[0072] In some optional implementations, step S3034 above includes: Step b1: Generate multiple contour points along the contour line, generate valley line points along the valley line, and construct a contour space vector by traversing the contour points starting from the intersection of the contour line and the valley line.

[0073] like Figure 6 As shown, multiple contour points are generated discretely along the contour line (hollow circles on the contour line in the figure). The overall spacing is equal, but a point is set at the inflection point. Using a similar method, valley line points (hollow circles on the valley line points) are also constructed on the valley line.

[0074] Starting from the intersection of the contour line and the valley line (i.e., the second type of intersection), the contour points on both sides are traversed and calculated to construct the contour space vector.

[0075] like Figure 6 As shown, the second type intersection point 1 and the contour point 1 below it form a contour vector. This contour point 1 and the contour point 2 below it form another contour vector. Each contour vector is connected end to end, and the endpoint of the construction is another second type intersection point or the last contour point.

[0076] Some merged contours may have multiple binary intersection points, and each binary intersection point requires the operation of constructing a contour space vector.

[0077] Step b2: Construct auxiliary vectors corresponding to each contour space vector and calculate the directed angle from the contour space vector to the auxiliary vector; based on the comparison result of the directed angle and the preset angle threshold, select contour points that meet the conditions.

[0078] Specifically, for a certain contour space vector, its auxiliary vector is constructed, as illustrated by contour vector 1: The two endpoints of the contour vector 1 are the second type intersection point 1 and the contour point 1. Find the points closest to the two points on the valley line, which correspond to the second type intersection point 1 and the valley line point 1 respectively. Connect these two points to construct a spatial vector, which is the auxiliary vector.

[0079] Calculate the directed angle from the contour space vector to the auxiliary vector. If the following conditions are met, retain the contour point (indicating that the terrain here is in a narrowing state): When the contour point is on the right bank (facing downstream on the right-hand side), the auxiliary vector rotates counterclockwise towards the contour vector by an angle less than a preset angle α; when the contour point is on the left bank (facing downstream on the left-hand side), the contour vector rotates counterclockwise towards the auxiliary vector by an angle greater than a preset angle (360-α). Based on experience, α can be set to 30°.

[0080] It's important to note that the cost of pumped storage power stations is highly sensitive to the scale of the reservoir project and investment. Ideally, a small dam should be able to enclose a relatively large reservoir within the natural terrain. This requires that the dam's length and height be relatively small (e.g., maximum dam length less than 600 meters, maximum dam height less than 100 meters). From a topographical perspective, these types of reservoirs typically exhibit the following characteristics: the reservoir is located in a valley, and the contour lines on both sides of the valley diverge from upstream to downstream, then converge, converging at a narrow point, indicating a potential dam site. Here, α is used to filter topographic points that meet the convergence requirements. Considering the significant differences in topographic features across different regions, α is a variable that can be set according to the specific circumstances. For example, in areas dominated by hilly terrain, a larger α is generally needed to identify suitable reservoirs. Conversely, in areas with widespread mountainous terrain and abundant reservoir resources, a smaller α can be used to select the best reservoir.

[0081] It should also be noted that: 1. The α used for the selection of upper and lower reservoirs can be different, because the upper reservoir is more difficult to find and the lower reservoir is easier to find, so the α of the upper reservoir can be smaller. 2. Regarding how to determine α, two solutions are proposed: (1) Based on engineering experience, first set a fixed number, such as 30°, and select a site. If a suitable upper reservoir site cannot be selected, then increase α and continue to identify the upper reservoir site until a suitable upper reservoir site is selected. (2) The α values ​​of the same type of reservoirs in the region can be counted, and the largest value can be taken as the α for this time. For example, select all medium-sized reservoirs in the region with an altitude of more than 300 meters for statistics.

[0082] Step b3: Connect the contour points located on both sides of the valley line to form multiple lines, and select the lines whose length is less than the preset dam length and whose relative height is less than the preset dam height as the dam line.

[0083] After completing steps b1 to b3, a series of points meeting the conditions are obtained on the left side of the valley line, and a series of points are also obtained on the right side. Connect all the points on the left and right sides together (connect left and right points, but not left and right points), forming several connecting lines.

[0084] Then, calculate the length and relative height of each connecting line. The length is the distance between two points, and the relative height is the elevation of the contour line minus the elevation difference between the intersection of the connecting line and the valley line.

[0085] Lines that simultaneously meet the following conditions are considered dam lines (e.g., the dotted lines in the diagram) and should be retained; all others should be deleted: The length is less than the preset dam length; The relative height is less than the preset dam height; The elevation of the contour lines manipulated is taken as the water level of the upper reservoir.

[0086] The main control server aggregates all dam lines, then checks if the area enclosed by a certain dam line and contour lines is entirely contained within the corresponding area of ​​another dam line. If so, the smaller area is deleted, the reservoir capacity is recalculated, and reservoirs that do not meet the preset minimum capacity are removed.

[0087] The method for calculating reservoir capacity is as follows: ① Starting from the water level line downwards, calculate the area enclosed by the dam line and the topographic line for each contour line to obtain the water level and corresponding area data.

[0088] ② The reservoir capacity is obtained by using the frustum volume formula, calculating the reservoir capacity between different water levels by area, and then summing them up.

[0089] A method for dynamically determining the preset minimum storage capacity: ① Virtual elevation difference = water level - lowest elevation of the site to be selected; ② Calculate the preset minimum storage capacity using the following formula: Minimum warehouse capacity = Minimum installed capacity × Minimum continuous full-load hours × 367.2 / 0.85 / Virtual height difference; Among them, the preset minimum installed capacity is the minimum installed capacity requirement for this site selection. For example, if the pumped storage site selection is mainly for pumped storage of the megawatt-level, it is set to 1 million kilowatts. It can also be adjusted according to actual working needs. For example, in some areas where the power grid needs a smaller pumped storage capacity, this value can be lowered.

[0090] The preset minimum continuous full-load hours are the minimum continuous full-load hours required for this site selection. The continuous full-load hours are set according to the needs of the power system. If a daily regulating power station is required, the value is 6; if a weekly regulating power station is required, the value is 10.

[0091] Based on the user's minimum site selection requirements and the reservoir's elevation, the minimum storage capacity requirement of the reservoir can be calculated using the above formula. If the dam line does not meet the minimum storage capacity requirement, the dam line can be directly deleted, which can reduce the amount of subsequent calculations.

[0092] After the above steps, the main control server takes the upper reservoir as the calculation task, queues all the selected upper reservoirs as task pools, sends the calculation tasks to the computing server one by one, and collects the calculation results from the computing server. The computing server determines the location area of ​​the lower reservoir according to the following steps S3035 to S3037, and returns the lower reservoir location identification result to the main control server.

[0093] Step S3035: Calculate the second elevation interval for the reservoir site selection. The lower limit of the second elevation interval is the larger of the following two values: the lowest elevation of the site selection area and the difference between the upper reservoir water level and the maximum allowable head. The upper limit of the second elevation interval is the difference between the upper reservoir water level and the minimum allowable head.

[0094] The lower limit of the second elevation interval is equal to max(the lowest elevation of the site to be selected, the water level of the upper reservoir, and the maximum allowable head). However, for some high-altitude, frigid regions, the head should not be too high.

[0095] The upper limit of the second elevation interval = upper reservoir water level - minimum allowable head.

[0096] Step S3036: Traverse from the upper limit of the second elevation to the lower limit of the second elevation one by one, calculate the site selection radius corresponding to the current elevation based on the preset allowable distance-to-elevation ratio, and construct a buffer zone with the reservoir site as the center and the site selection radius as the radius.

[0097] Starting from the upper limit of the second elevation and moving towards the lower limit of the second elevation, we traverse the elevations one by one to determine the distance to the lower reservoir site corresponding to each elevation. Using this distance as the radius and the upper reservoir site as the center, we construct a buffer zone.

[0098] For example, if the water level of a certain reservoir is 500m, when calculating a 300m elevation difference, the corresponding contour line is 200m. If the allowable distance-to-elevation ratio is 10, then the site selection range is 2000m. Therefore, a buffer zone is constructed with a radius of 2000m, and all contour lines within this buffer zone must be calculated.

[0099] Step S3037: Select contour lines that intersect with the buffer zone as candidate contour lines, construct the reservoir site selection area based on the candidate contour lines, and identify the reservoir site within the reservoir site selection area.

[0100] Select contour lines that intersect with the buffer zone as candidate contour lines.

[0101] After all the upper reservoirs have been calculated, the main control server uses all the selected contour lines as a task pool and assigns them to the calculation server. The calculation server performs the lower reservoir site selection calculation on these contour lines. The calculation method is the same as the identification of the upper reservoir site in steps S3031 to S3034.

[0102] Step S304: Combine the upper reservoir site and the lower reservoir site to form a pumped storage station site.

[0103] Specifically, the main control server iterates through the upper reservoir sites one by one, and distributes the upper reservoir sites as a pool of computing tasks to the computing server. The computing server takes the upper reservoir sites as the center, and combines the lower reservoir sites identified in the lower reservoir site selection area with the upper reservoir sites in pairs to obtain effective pumped storage station sites.

[0104] The pumped storage site selection method provided in this embodiment improves upon the traditional top-down search strategy. It first identifies scarcer upper reservoir sites, then finds suitable lower reservoir sites in the surrounding area based on these upper sites. Instead of exhaustive search, the method is tailored to the terrain characteristics, significantly reducing computational load and improving efficiency. It is adaptable to complex terrain and can also be used for the site selection of conventional hydropower projects and reservoirs.

[0105] As one or more specific application embodiments of the present invention, the pumped storage site selection method provided by the present invention will be further described in detail. In order to quantitatively evaluate the advantages of the method in terms of computational efficiency and site selection effect, a small county in Province A was selected as the test object. The county has an area of ​​1950 square kilometers. The area has many mountains, large topographic relief, and complex water system conditions, which have typical pumped storage site selection characteristics.

[0106] The technical requirements for this site selection are to identify all sites with an installed capacity of not less than 1 million kilowatts, continuous full-load operating hours of not less than 6 hours, average gross head of not less than 300 meters, and a distance-to-height ratio of not more than 10.

[0107] Control group (traditional exhaustive search method): First, exhaustively scan all possible reservoirs in the entire region, then exhaustively combine the reservoirs in pairs, calculate the basic hydropower parameters of each combination one by one, and retain the reservoirs whose hydropower parameters meet the requirements.

[0108] Experimental group (the method provided in the embodiments of the present invention): adopts a top-down search strategy, prioritizes the identification of potential scarce resources of "upper reservoir" based on terrain features, and then uses this as the core to conduct a surrounding search.

[0109] Independent tests were conducted under the same hardware environment: one control server (CPU: Core i9-11900H) and nine compute servers (CPU: Core i9-10900X). The specific data comparison after running the two methods in the same test area is shown in Table 1 below: Table 1 Comparison of specific data after running the two methods in the same test area.

[0110] The comparison data above shows that: (1) Significantly improved efficiency: The "top-down, scarce resource priority" strategy provided by the embodiments of the present invention completely avoids the traditional "broad-net" calculation mode. By filtering at the terrain data level, the amount of calculation is reduced by more than 80%, which has revolutionized the efficiency of pumped storage site selection in large areas and complex terrain.

[0111] (2) No loss of accuracy: While the amount of computation is greatly reduced, the site can still be effectively identified without omission.

[0112] (3) Improved practicality: The traditional "wide net" calculation mode can identify a large number of reservoir and station combinations. After the combination is formed, manual selection is still required. Especially for some large site selection areas, the workload and time of selection are very large. The method provided by the present invention eliminates a large number of invalid stations in the process, reducing the workload and time of selection.

[0113] This embodiment also provides a pumped storage site selection device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0114] This embodiment provides a pumped storage site selection device, such as... Figure 7 As shown, it includes: The data acquisition module 701 is used to acquire the digital elevation model of the area to be selected and to generate ridge lines and valley lines based on the digital elevation model.

[0115] The elevation interval determination module 702 is used to determine the first elevation interval for reservoir site selection based on the ridgeline and valleyline.

[0116] The reservoir site identification module 703 is used to identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify the lower reservoir site within the lower reservoir site selection area.

[0117] The reservoir site combination module 704 is used to combine the upper reservoir site and the lower reservoir site to form a pumped storage station site.

[0118] In some alternative implementations, the elevation interval determination module 702 includes: The upper limit determination unit is used to extract the highest elevation of the digital elevation model and use the highest elevation as the first elevation upper limit of the first elevation interval.

[0119] The lower limit determination unit is used to identify closed contour lines associated with valley lines, and to take the lowest elevation among the closed contour lines as the terrain lower limit; to calculate the sum of the lowest elevation of the digital elevation model and the preset minimum allowable water head as the economic lower limit, and to take the larger value between the terrain lower limit and the economic lower limit as the first elevation lower limit of the first elevation interval.

[0120] The first elevation interval determination unit is used to determine the first elevation interval for the selection of the upper reservoir site based on the upper limit of the first elevation and the lower limit of the first elevation.

[0121] In some alternative implementations, the reservoir site identification module 703 includes: The contour line extraction unit is used to take each elevation value within the first elevation interval as the elevation to be processed and extract the contour line corresponding to each elevation to be processed. The segmentation and filtering unit is used to divide the contour lines into multiple contour lines using the ridge line as the dividing line; it determines whether each contour line intersects with the valley line, and if they do not intersect, the corresponding contour line is deleted.

[0122] The merging unit is used to merge the remaining outlines to obtain multiple upper reservoir site selection areas.

[0123] The upper reservoir site determination unit is used to determine the dam line within each upper reservoir site selection area and to screen out upper reservoir sites that meet the reservoir capacity conditions based on the dam line.

[0124] In some alternative implementations, the merging unit includes: The judgment sub-unit is used to merge two contour lines when they intersect with the same ridge line, the straight-line distance between the intersection points is less than a preset value, and the valley lines corresponding to the two contour lines are connected to each other.

[0125] In some optional implementations, the reservoir site determination unit includes: The contour space vector construction sub-unit is used to discretize and generate multiple contour points along the contour line, generate valley line points along the valley line, and traverse the contour points to construct the contour space vector starting from the intersection of the contour line and the valley line.

[0126] The contour point filtering subunit is used to construct auxiliary vectors corresponding to each contour space vector and calculate the directed angle from the contour space vector to the auxiliary vector; based on the comparison result of the directed angle and the preset angle threshold, contour points that meet the conditions are filtered.

[0127] The dam line determination sub-unit is used to connect the contour points located on both sides of the valley line to form multiple lines, and to select the lines whose length is less than the preset dam length and whose relative height is less than the preset dam height as the dam line.

[0128] In some optional implementations, the reservoir site identification module 703 further includes: The second elevation interval calculation unit is used to calculate the second elevation interval for the selection of the lower reservoir site. The lower limit of the second elevation interval is the larger of the following two values: the lowest elevation of the site to be selected area and the difference between the upper reservoir water level and the maximum allowable head. The upper limit of the second elevation interval is the difference between the upper reservoir water level and the minimum allowable head.

[0129] The buffer construction unit is used to traverse from the upper limit of the second elevation to the lower limit of the second elevation, calculate the site selection radius corresponding to the current elevation based on the preset allowable distance-to-elevation ratio, and construct the buffer with the reservoir site as the center and the site selection radius as the radius.

[0130] The lower reservoir site determination unit is used to select contour lines that intersect with the buffer zone as candidate contour lines, construct the lower reservoir site selection area based on the candidate contour lines, and identify the lower reservoir site within the lower reservoir site selection area.

[0131] In one optional implementation, identifying the reservoir site within the selected reservoir site area includes: The same steps as those used to identify multiple upper reservoir sites were employed to identify the lower reservoir sites.

[0132] The pumped storage site selection device provided in this embodiment of the invention can execute the pumped storage site selection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects for executing the method. Further functional descriptions of the various modules and units are the same as in the corresponding embodiments described above, and will not be repeated here.

[0133] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0134] The following is a detailed reference. Figure 8 This diagram illustrates a suitable structural schematic for implementing an electronic device according to embodiments of the present invention. The electronic device may include a processor (e.g., a central processing unit, graphics processor, etc.) 801, which can perform various appropriate actions and processes based on a program stored in read-only memory (ROM) 802 or a program loaded from memory 808 into random access memory (RAM) 803. The RAM 803 also stores various programs and data required for the operation of the electronic device. The processor 801, ROM 802, and RAM 803 are interconnected via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0135] Typically, the following devices can be connected to I / O interface 805: input devices 806 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 807 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; memory devices 808 including, for example, magnetic tapes, hard disks, etc.; and communication devices 809. Communication device 809 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 8 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown, and more or fewer devices may be implemented or have instead.

[0136] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 809, or installed from a memory 808, or installed from a ROM 802. When the computer program is executed by the processor 801, it performs the functions defined in the pumped storage addressing method of the embodiments of the present invention.

[0137] Figure 8 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0138] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When the software or computer code is accessed and executed by the computer, processor, or hardware, the pumped-storage site selection method shown in the above embodiments is implemented.

[0139] A portion of this invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide the methods and / or technical solutions according to the invention through the operation of the computer. Those skilled in the art will understand that the forms in which computer program instructions exist in a computer-readable medium include, but are not limited to, source files, executable files, installation package files, etc. Correspondingly, the ways in which computer program instructions are executed by a computer include, but are not limited to: the computer directly executing the instructions, or the computer compiling the instructions and then executing the corresponding compiled program, or the computer reading and executing the instructions, or the computer reading and installing the instructions and then executing the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to a computer.

[0140] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for selecting a site for pumped storage hydroelectric power generation, characterized in that, The method includes: Obtain the digital elevation model of the area to be selected, and generate ridge lines and valley lines based on the digital elevation model; The first elevation interval for selecting the upper reservoir site is determined based on the ridgeline and the valleyline, including: Extract the highest elevation from the digital elevation model and use the highest elevation as the first elevation upper limit of the first elevation interval; Identify the closed contour lines associated with the valley line, and use the lowest elevation among the closed contour lines as the lower limit of the terrain; The sum of the lowest elevation of the digital elevation model and the preset minimum allowable water head is calculated as the economic lower limit, and the larger value between the terrain lower limit and the economic lower limit is used as the first elevation lower limit of the first elevation interval. The first elevation range for selecting the site of the upper reservoir is determined based on the first upper elevation limit and the first lower elevation limit; Multiple upper reservoir sites are identified within the first elevation interval. A lower reservoir site selection area is constructed centered on each upper reservoir site, and lower reservoir sites are identified within the lower reservoir site selection area. The multiple upper reservoir sites identified within the first elevation interval include: Each elevation value within the first elevation interval is taken as the elevation to be processed, and the contour lines corresponding to each elevation to be processed are extracted. Using the ridgeline as a dividing line, the contour lines are divided into multiple outline lines; Determine whether each contour line intersects with the valley line; if they do not intersect, delete the corresponding contour line. The remaining outlines are merged to obtain multiple reservoir site selection areas; Within each reservoir site selection area, dam lines are determined, and reservoir sites that meet the reservoir capacity requirements are selected based on the dam lines. The determination of dam lines within the site selection areas of each upper reservoir includes: Multiple contour points are generated along the contour line, valley line points are generated along the valley line, and the contour space vector is constructed by traversing the contour points starting from the intersection of the contour line and the valley line. Construct auxiliary vectors corresponding to each contour space vector, and calculate the directed angle from the contour space vector to the auxiliary vector; Based on the comparison results between the directional angle and the preset angle threshold, contour points that meet the conditions are selected. Connect the contour points located on both sides of the valley line to form multiple lines, and select the lines whose length is less than the preset dam length and whose relative height is less than the preset dam height as the dam line. Construct a downstream reservoir site selection area centered on each upstream reservoir site, and identify downstream reservoir sites within the downstream reservoir site selection area, including: Calculate the second elevation interval for the reservoir site selection. The lower limit of the second elevation interval is the larger of the following two values: the lowest elevation of the site selection area and the difference between the upper reservoir water level and the maximum allowable head. The upper limit of the second elevation interval is the difference between the upper reservoir water level and the minimum allowable head. Traverse from the upper limit of the second elevation to the lower limit of the second elevation one by one, calculate the site selection radius corresponding to the current elevation based on the preset allowable distance-to-elevation ratio, and construct a buffer zone with the reservoir site as the center and the site selection radius as the radius. Select contour lines that intersect with the buffer zone as candidate contour lines, construct a reservoir site selection area based on the candidate contour lines, and identify the reservoir site within the reservoir site selection area. The upper reservoir site and the lower reservoir site are combined to form a pumped storage power station site.

2. The method according to claim 1, characterized in that, The process of merging the retained contour lines includes: When two contour lines intersect the same ridgeline, the straight-line distance between the intersection points is less than a preset value, and the valley lines corresponding to the two contour lines are connected to each other, the two contour lines are merged.

3. The method according to claim 1, characterized in that, Within the selected site area of ​​the lower reservoir, the location of the lower reservoir is identified, including: The same steps as those used to identify multiple upper reservoir sites were employed to identify the lower reservoir sites.

4. A pumped storage site selection system, characterized in that, The pumped storage site selection method according to any one of claims 1 to 3, wherein the system comprises: The main control server is used to acquire the digital elevation model of the area to be selected, and generate ridge lines and valley lines based on the digital elevation model; and to determine the first elevation interval for the upper reservoir site selection based on the ridge lines and valley lines, including: Extract the highest elevation from the digital elevation model and use the highest elevation as the first elevation upper limit of the first elevation interval; Identify the closed contour lines associated with the valley line, and use the lowest elevation among the closed contour lines as the lower limit of the terrain; The sum of the lowest elevation of the digital elevation model and the preset minimum allowable water head is calculated as the economic lower limit, and the larger value between the terrain lower limit and the economic lower limit is used as the first elevation lower limit of the first elevation interval. The first elevation range for selecting the site of the upper reservoir is determined based on the first upper elevation limit and the first lower elevation limit; Multiple computing servers are connected to the main control server and run in parallel to identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify lower reservoir sites within the lower reservoir site selection area. The main control server is also used to combine the upper reservoir site and the lower reservoir site to form a pumped storage station site.

5. A pumped storage site selection device, characterized in that, The apparatus used in the pumped storage site selection method according to any one of claims 1 to 3 comprises: The data acquisition module is used to acquire the digital elevation model of the area to be selected, and to generate ridge lines and valley lines based on the digital elevation model; An elevation interval determination module is used to determine the first elevation interval for the upper reservoir site selection based on the ridgeline and the valleyline, including: Extract the highest elevation from the digital elevation model and use the highest elevation as the first elevation upper limit of the first elevation interval; Identify the closed contour lines associated with the valley line, and use the lowest elevation among the closed contour lines as the lower limit of the terrain; The sum of the lowest elevation of the digital elevation model and the preset minimum allowable water head is calculated as the economic lower limit, and the larger value between the terrain lower limit and the economic lower limit is used as the first elevation lower limit of the first elevation interval. The first elevation range for selecting the site of the upper reservoir is determined based on the first upper elevation limit and the first lower elevation limit; The reservoir site identification module is used to identify multiple upper reservoir sites within the first elevation interval, construct a lower reservoir site selection area centered on each upper reservoir site, and identify the lower reservoir site within the lower reservoir site selection area. The reservoir site combination module is used to combine the upper reservoir site and the lower reservoir site to form a pumped storage station site.

6. An electronic device, characterized in that, include: The system includes a memory and a processor, which are interconnected and the memory stores computer instructions. The processor executes the computer instructions to perform the pumped storage site selection method according to any one of claims 1 to 3.

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