Pumped storage power station site selection method, data processing terminal and readable storage medium

Abstract

The application discloses a pumped storage power station site selection method, a data processing terminal and a readable storage medium, and comprises the following steps: processing digital elevation data, performing hydrological analysis, and constructing a water system model; taking a water system intersection point as a discharge outlet, dividing a basin according to the discharge outlet, and preparing a site selection area; in the site selection area, a traversal algorithm is adopted, a dam axis is moved from a downstream to an upstream of the water system, dam axis length and dam height are considered, a dam axis is prepared with a maximum reservoir capacity as a target; according to a reservoir capacity calculation result, upper and lower reservoirs are divided, the upper and lower reservoirs are matched through a distance-height ratio, and finally, the reservoir site preparation is completed. Compared with a traditional artificial pumped storage power station site selection, the application provides a theoretical method for simultaneously carrying out large-scale multi-region pumped storage power station site selection.

Description

TECHNICAL FIELD

[0001] The application relates to a pumped storage power station site selection method, in particular a pumped storage power station site selection method, a data processing terminal and a readable storage medium based on a geographic information system, which can simultaneously carry out large-scale multi-region pumped storage power station site selection through hydrological analysis and traversal algorithms. BACKGROUND

[0002] The development of pumped storage power stations has entered a peak construction period, and the site selection of the power stations is crucial. The site selection of the pumped storage power stations needs to consider water source conditions, water head, reservoir capacity, distance-height ratio of upper and lower reservoirs, geographical location and geological conditions and the like, and is a work with numerous influencing factors, time-consuming and labor-intensive and huge workload. In the early stage of project construction, large-scale preliminary site selection work needs to be carried out, and the work is mainly carried out manually on a topographic map. The manual site selection mainly depends on the topographic trend to obtain the largest reservoir capacity and the smallest distance-height ratio of the upper and lower reservoirs as the site selection standard, and the manual site selection has the disadvantages of long time, error caused by experience judgment and insufficient comprehensive screening range, and an automatic standardized site selection method is urgently needed. SUMMARY

[0003] The technical problem to be solved by the application is to provide a pumped storage power station site selection method, a data processing terminal and a readable storage medium, which can simultaneously carry out large-scale multi-region site selection in the preliminary site selection stage.

[0004] The technical scheme adopted by the application is: a pumped storage power station site selection method, comprising the following steps:

[0005] Firstly, geographic elevation data is obtained, and a water system is generated for a region with a certain water collection capacity according to the geographic elevation data to construct a water system model;

[0006] Secondly, a water system intersection point is taken as a discharge outlet, and a plurality of sub-basins are divided, and the plurality of sub-basins are taken as a total site selection region;

[0007] Thirdly, a sub-basin is selected, and a dam axis is moved vertically along the water system from the downstream to the upstream in the selected site selection region with the discharge outlet as a starting point and k as a moving step, the dam axis is intersected with the water system at a C point and intersected with the site selection region boundary at two points every k step;

[0008] Fourthly, the dam length, dam height, normal water level elevation and corresponding area of the reservoir are determined, comprising the following steps:

[0009] (1) the elevation values of the two points obtained in the third step are compared, a low value point is taken as one end point B1 of the dam axis, and the low value point is taken as a starting point to search for a same elevation value point in the site selection region;

[0010] (2) When the points with the same elevation as B1 in the site selection area can be connected into contour lines intersecting the dam axis and enclosing a closed area, taking the intersection point of the contour line and the dam axis as the end point, as another end point B2 of the dam axis;

[0011] (3) When the points with the same elevation as B1 in the site selection area can be connected into contour lines intersecting the dam axis but cannot enclose a closed area, or when the points with the same elevation as B1 in the site selection area cannot be connected into contour lines intersecting the dam axis, taking k as the step length, lowering the elevation of B1 along the dam axis, and then repeating (2) until the condition is met;

[0012] (4) The normal storage level elevation is determined to be the same as B1, denoted as H; the closed area enclosed by the contour line at the normal storage level elevation and the dam axis is the normal storage area, denoted as F; the distance between B1 and B2 is the dam length, denoted as L; the elevation of point C is the dam bottom elevation, denoted as H 底 ; the dam height is determined as the difference between the normal storage level and the dam bottom elevation, denoted as Z = H - H 底 ;

[0013] Fifth step, when C point moves every k step length, the reservoir parameters H, F, L, Z at this position are determined, and the reservoir volume V is calculated according to the geographic elevation data;

[0014] Sixth step, when C point moves a k step length, the reservoir volume at this time is compared with the reservoir volume at the last position under the consideration of the dam length L and the dam height Z, when the reservoir volume is greater than the last position, it is considered that the dam axis position at this time is better, otherwise it is considered that the last time is better, and the specific constraints are as follows:

[0015]

[0016] In the formula, V i , V i+1 are the reservoir volumes when the dam axis moves every k step length;

[0017] According to the above method, the local optimal position of the dam axis can be determined, when the local optimal position is obtained, the reservoir index parameters at the position are stored; taking the reservoir volume condition as the determining factor, the dam axis position with the maximum reservoir volume is taken as the global optimal position in the site selection area, and the reservoir site is determined;

[0018] Seventh step, taking the next sub-basin position as the new starting point, repeating the third step to the sixth step to continue traversal, until each sub-basin completes the reservoir site determination, and one sub-basin corresponds to one reservoir site;

[0019] The eighth step is to locate the upper reservoir and the lower reservoir in the proposed reservoir site, and the rest of the reservoir site is invalid reservoir site; and the C point of the upper reservoir and the lower reservoir is connected as the horizontal distance S of the upper reservoir and the lower reservoir within a certain range with the lower reservoir as the center, and the difference between the normal water level elevations of the upper reservoir and the lower reservoir is taken as the average water head of the power station The upper reservoir and the lower reservoir of the power station are matched by taking the height ratio as the screening condition, and the site selection work is completed.

[0020] Preferably, the geographic elevation data in the first step is DEM data or contour data, the DEM data is downloaded through a website, and the contour data is measured or simulated contour data.

[0021] Preferably, in the first step, the region with a certain catchment capacity is generated into a water system according to the geographic elevation data by using ArcGIS, and a water system model is constructed; and in the second step, a plurality of sub-basins are divided by using ArcGIS.

[0022] Preferably, the fifth step includes: when the input data is DEM data, the DEM data is converted into TIN data by using the raster-to-TIN function of ArcGIS; when the input data is contour data, the elevation data is extracted into a Shapefile format by using ArcGIS, and TIN data is created accordingly; when the C point moves by k steps, the reservoir parameters H, F, L and Z at the position are determined, and the reservoir volume V is calculated by using the surface volume function of ArcGIS, and the expression is as follows:

[0023] V=f(TIN,Polygon_F,H,BELOW)

[0024] In the formula, TIN is TIN data; Polygon_F is a planar element corresponding to the normal water level; H is the normal water level elevation value; BELOW is a calculation parameter; and V is the volume between the selected planar element and the TIN data below the planar element, that is, the reservoir volume.

[0025] Preferably, the value of k in the third step is determined according to the accuracy of the geographic elevation data, and the specific constraints are as follows:

[0026] (1) If the DEM spatial resolution accuracy is lower than or equal to 10m×10m, or the contour scale is ≤1:10000, the value of k is 10m;

[0027] (2) If the DEM spatial resolution accuracy is lower than or equal to 5m×5m, or the contour scale is ≤1:5000, the value of k is 5m;

[0028] (3) If the DEM spatial resolution accuracy is higher than 5m×5m, or the contour scale is >1:5000, the value of k is 2m.

[0029] Preferably, in the sixth step, according to practical engineering experience, Z 限 = 150 m, L 限 = 2000 m.

[0030] Preferably, in the eighth step, in the proposed reservoir site, the reservoir capacity is between 5 million m 3 and 10 million m 3 The lower reservoir with a reservoir capacity greater than 10 million m 3 is positioned, and the remaining reservoir sites are invalid reservoir sites; and the C point of the upper and lower reservoirs determined in the optimal position is connected as the horizontal distance S of the upper and lower reservoirs within a range of not more than 5 km from the center of the lower reservoir, and the difference between the normal water levels of the upper and lower reservoirs is used as the average water head of the power station The distance-height ratio is not greater than 10 as a screening condition, and the upper and lower reservoirs of the power station are matched to complete the site selection work.

[0031] A data processing terminal for realizing the above-mentioned pumped storage power station site selection method.

[0032] A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the above-mentioned pumped storage power station site selection method.

[0033] The present application has the beneficial effects that, in combination with geographic elevation data, factors such as water source conditions, water head, reservoir capacity, distance-height ratio of upper and lower reservoirs, hydrological analysis and traversal algorithm are considered to select the optimal dam site, and the process and program conditions are provided, and the traditional manual site selection method is improved by combining ArcGIS and programs, and large-scale multi-region site selection work can be carried out at the same time, and the work efficiency and accuracy are greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a flowchart of the pumped storage power station site selection method of the present application;

[0035] Figure 2 is a digital elevation acquisition display diagram of the method of the present application;

[0036] Figure 3 is a water system model generation display diagram of the method of the present application;

[0037] Figure 4 is a situation diagram of the method of the present application;

[0038] Figure 5 is another situation diagram of the method of the present application. DETAILED DESCRIPTION

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] like Figure 1 As shown, a method for site selection of a pumped storage power station according to the present invention includes the following steps:

[0041] The first step is to obtain geographic elevation data, and based on the geographic elevation data, generate water systems in areas with a certain water catchment capacity, and build a water system model.

[0042] The second step is to divide the area into several sub-basins, using the confluence of water systems as the outlet, and then use these sub-basins as the overall site selection area.

[0043] The third step is to select a sub-basin. Within the selected site area, starting from the outlet, move the dam axis from downstream to upstream, perpendicular to the water system, along the water system, with k as the moving step. Every k steps the dam axis moves, it intersects the water system at point C and the boundary of the site area at two points.

[0044] The fourth step is to determine the dam length, dam height, normal water level elevation, and corresponding area of ​​the reservoir, including the following steps:

[0045] (1) Compare the elevation values ​​of the two points at the boundary of the intersecting site selection area obtained in the third step, take the lower value point as an endpoint B1 of the dam axis, and use this lower value point as the starting point to search for the same elevation value point in the site selection area.

[0046] (2) When points with the same elevation as B1 can be connected in the site selection area to form contour lines that intersect with the dam axis and enclose a closed area, the point where the contour lines intersect with the dam axis is taken as the endpoint, which is the other endpoint B2 of the dam axis.

[0047] (3) When points with the same elevation as B1 can be connected in the site selection area to form contour lines that intersect the dam axis, but cannot form a closed area, or when points with the same elevation as B1 cannot be connected in the site selection area to form contour lines that intersect the dam axis, the elevation of B1 is reduced along the dam axis with k as the step size, and (2) is repeated until the condition is met.

[0048] (4) The normal water level elevation is to be the same as B1, denoted as H; the closed area enclosed by the contour line containing the normal water level elevation and the dam axis is the normal water level area, denoted as F; the distance between B1 and B2 is the dam length, denoted as L; the elevation of point C is the dam bottom elevation, denoted as H. 底 The dam height is to be the difference between the normal water level and the dam base elevation, denoted as Z = HH.底 ;

[0049] The fifth step is to determine the reservoir parameters H, F, L and Z at the position of point C every k step, and to calculate the reservoir volume V according to the geographic elevation data;

[0050] The sixth step is to compare the reservoir volume at the current position with the reservoir volume at the previous position when point C moves a k step, and to consider the dam length L and dam height Z, when the reservoir volume is greater than the previous position, it is considered that the dam axis position is better at this time, otherwise it is considered that the previous time is better, and the specific constraints are as follows:

[0051]

[0052] In the formula, V i , V i+1 is the reservoir volume when the dam axis moves a k step;

[0053] According to the above method, the local optimal position of the dam axis can be determined, and when the local optimal position is obtained, the reservoir index parameters of the position are stored; the reservoir capacity condition is taken as the determining factor, and the dam axis position with the maximum reservoir capacity is taken as the global optimal position in the site selection area, and the reservoir site is planned;

[0054] The seventh step is to repeat the third step to the sixth step to continue the traversal with the next sub-basin position as the new starting point, until each sub-basin completes the reservoir site planning, and one sub-basin corresponds to one reservoir site;

[0055] The eighth step is to position the upper reservoir and the lower reservoir in the planned reservoir site, and the remaining reservoir sites are invalid reservoir sites; and the C point with the optimal position of the upper and lower reservoirs is connected as the horizontal distance S of the upper and lower reservoirs within a certain range, and the difference between the normal water levels of the upper and lower reservoirs is taken as the average water head of the power station The upper and lower reservoirs of the power station are matched by taking the height ratio as the screening condition, and the site selection work is completed.

[0056] The geographic elevation data in the first step is DEM data or contour data, the DEM data is downloaded through a website, and the contour data is measured or simulated contour data.

[0057] In the first step, the ArcGIS is used to generate a water system in the region with a certain catchment capacity according to the geographic elevation data, and to construct a water system model; in the second step, a plurality of sub-basins are divided by ArcGIS.

[0058] The fifth step includes: when the input data is DEM data, using ArcGIS's raster-to-TIN function to convert the DEM data into TIN data; when the input data is contour data, using ArcGIS to extract the elevation data into Shapefile format, and creating TIN data accordingly; and determining the reservoir parameters—H, F, L, Z—at point C every k steps, and calculating the reservoir volume V using ArcGIS's surface volume function, as shown in the following expression:

[0059] V = f(TIN, Polygon_F, H, BELOW)

[0060] In the formula, TIN is the TIN data; Polygon_F is the areal feature corresponding to the normal water level; H is the elevation value of the normal water level; BELOW is the calculation parameter; V is the volume between the selected areal feature and the TIN data below it, which is the reservoir volume.

[0061] The value of k in the third step is determined based on the accuracy of the geographic elevation data, and the specific constraints are shown in Table 1:

[0062] Table 1. Values ​​of k

[0063] k value (m) DEM spatial resolution Contour scale 10 Accuracy less than or equal to 10 m x 10 m ≤1:10000 5 Accuracy less than or equal to 5 m x 5 m ≤1:5000 2 Accuracy greater than 5 m x 5 m ＞1:5000

[0064] In step six, based on practical engineering experience, Z 限 =150m, L 限 =2000m.

[0065] In the eighth step, at the proposed storage site, a storage capacity of between 5 million cubic meters will be selected. 3 With 10 million m 3 The reservoir site will be located between [locations], with a capacity greater than 10 million cubic meters. 3 The lower reservoir is designated as the optimal location, and all other reservoir sites are invalid. Within a 5km radius of the lower reservoir, a line connecting point C, representing the optimal location of the upper and lower reservoirs, is taken as the horizontal distance S between them. The difference in normal water level between the upper and lower reservoirs is used as the average head of the power station. With height ratio Using a threshold of 10 as a screening criterion, the upper and lower reservoirs of the power station are matched to complete the site selection process.

[0066] A data processing terminal for implementing the above-mentioned pumped storage power station site selection method.

[0067] A computer-readable storage medium includes instructions that, when executed on a computer, cause the computer to perform the pumped storage power station site selection method as described above.

[0068] In step seven, based on practical engineering experience, Z 限 =150m, L限 = 2000 m.

[0069] The higher the accuracy of the geographic elevation data, the closer the site selection result is to the actual situation;

[0070] In practice, the upper reservoir is often located in a relatively closed depression, and the lower reservoir is often located on a river channel and a gully. Both the upper and lower reservoirs need to have a certain catchment capacity, and the lower reservoir needs more. Based on this feature, with the help of ArcGIS, the area with a certain catchment capacity is generated into a water system according to the geographic elevation data, a water system model is constructed, and the dam site is located on the water system model, so as to select a more accurate site;

[0071] According to engineering experience, a watershed with an area greater than 0.5 km 2 is selected as a possible reservoir site;

[0072] Based on DEM data, the DEM data is converted into TIN data by using the "raster to TIN" function of ArcGIS. TIN (Triangle Irregular Network) is an irregular triangle network model, which not only reduces the data redundancy caused by the regular grid method, but also is superior to the method based on contour lines in terms of slope calculation efficiency.

[0073] Distance-height ratio is used to preliminarily evaluate the economy of the power station. The larger the distance-height ratio, the longer the water conveyance system, the greater the water head loss, the more difficult the engineering layout, and the worse the economy.

[0074] The following examples illustrate the examples calculated by the method of the present application:

[0075] Firstly, DEM data of the site selection area is obtained, and 30 m resolution ASTER GDEM digital elevation data is downloaded from a geographic spatial data cloud platform, as shown in Figure 2 ; by using the "spatial analysis" tool of ArcGIS, through the steps of filling, flow direction analysis, flow accumulation, water system extraction and the like, a water system model is generated, as shown in Figure 3 ;

[0076] Secondly, by using the "watershed" tool of ArcGIS, the water system intersection point is taken as a discharge outlet, the sub-basin is divided, and the sub-basin with an area greater than 0.5 km 2 is selected as the total site selection area;

[0077] Thirdly, a sub-basin is selected, the dam axis is moved vertically along the water system from downstream to upstream in the selected site selection area, the dam axis is moved every k step length (k=10 m at this time), the water system is intersected at point C, and the site selection area boundary is intersected at two points;

[0078] Fourth step, determine the length of the dam, dam height, normal water level elevation and its corresponding area, including the following steps:

[0079] (1) to compare the elevation values of two points, as a low point as the dam axis of one end point B1, the other end point for B2 to this low point as the starting point to find the same elevation points within the region. When the same elevation points as B1 can be connected into the dam axis intersection contour within the reservoir area, and enclosed area, then the intersection point of the contour and the dam axis as the end point, as the other end point B2 of the dam axis. In the form of contour line, as shown in Figure 4 ;

[0080] (2) to when the same elevation points as B1 can be connected into the dam axis intersection contour within the reservoir area, and can not be enclosed area, according to the actual experience with 10 m step, along the dam axis to reduce the elevation of B1, and repeat (1), until the conditions are met. In the form of contour line, as shown in Figure 5 ;

[0081] So far, the normal water level elevation and B1 and B2 are the same, recorded as H, taking the fifth step (1) as an example, H = 960 m; the normal water level elevation of the contour line and the dam axis enclosed area is the normal water level area, recorded as F, F = 370000 m 2 , the distance between B1 and B2 is the length of the dam, recorded as L, L = 465 m; the elevation of point C is the dam bottom elevation, recorded as H 底 , H 底 = 868 m, the dam height is the difference between the normal water level and the dam bottom elevation, recorded as Z = H-H 底 = 960-868 = 92 m;

[0082] The fifth step, using DEM data, using the "raster to TIN" function of ArcGIS, convert DEM data to TIN data; at each k step of point C, determine the parameters of the reservoir at this position, H, F, L, Z, and use the "surface volume" function of ArcGIS to calculate the reservoir volume V. The calculation principle is: the TIN data is checked with each triangle to determine its area and volume, and the sum of these parts is output. The expression is as follows:

[0083] V = f(TIN, Polygon_F, H, BELOW)

[0084] In the formula, TIN is the TIN data; Polygon_F is the normal water level corresponding to the surface element; H is the normal water level elevation value; BELOW is the calculation parameter, indicating that the calculated volume is the volume between the selected surface element and the TIN data below, that is, the reservoir volume. The calculation result of V is 1050000 m3 ;

[0085] The sixth step, when the C point moves a k step, the reservoir capacity at this time is compared with the reservoir capacity at the last position, considering the dam length, dam height and other factors. When the reservoir capacity is greater than the last position, it is considered that the dam axis position at this time is better, otherwise it is considered that the last time is better. The specific constraints are as follows:

[0086]

[0087] In the formula, V i , V i+1 is the reservoir capacity when the dam axis moves a k step. According to the actual engineering experience, the dam height should not be higher than 150m, that is, Z 限 =150m; the dam length should not be higher than 2000m, that is, L 限 =2000m;

[0088] According to the above method, the local optimal position of the dam axis can be determined. When the local optimal position is obtained, the reservoir index parameters of the position are stored. The reservoir capacity condition is taken as the determining factor, and the dam axis position with the maximum reservoir capacity is taken as the global optimal position in the site selection area, and the reservoir site is planned.

[0089] The seventh step, the next sub-basin position is taken as the new starting point, and the third step to the eighth step is repeated to continue the traversal, until each sub-basin completes the reservoir site planning, and one sub-basin corresponds to one reservoir site.

[0090] The eighth step, in the planned reservoir site, according to the engineering experience, the reservoir capacity between 5 million m 3 and 10 million m 3 is positioned as the upper reservoir, the reservoir capacity greater than 10 million m 3 is positioned as the lower reservoir, and the rest of the reservoir site is invalid. Within 4km of the lower reservoir, the C point of the upper and lower reservoirs is connected as the horizontal distance S of the upper and lower reservoirs, and the difference between the normal storage levels of the upper and lower reservoirs is taken as the average water head The distance-height ratio (distance-height ratio is used to preliminarily evaluate the economy of the power station. The greater the distance-height ratio, the longer the water conveyance system, the greater the water head loss, the greater the difficulty of engineering layout, and the worse the economy) is not greater than 10 as the screening condition, and the upper and lower reservoirs of the power station are matched to complete the site selection work.

[0091] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of one or more computer programs in a computer program product. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer program instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL) or wireless (such as infrared, wireless, microwave, etc.)) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)) and the like.

[0092] The above described embodiments are only used to illustrate the technical ideas and characteristics of the present application, and the purpose is to enable those skilled in the art to understand and implement the present application, and cannot be limited to the patent scope of the present application only by the above embodiments, that is, any equivalent changes or modifications made according to the spirit disclosed by the present application still fall within the patent scope of the present application.

Claims

1. A method for site selection of a pumped storage power station, characterized in that, Includes the following steps: The first step is to obtain geographic elevation data, and based on the geographic elevation data, generate water systems in areas with a certain water catchment capacity, and build a water system model. The second step is to divide the area into several sub-basins, using the confluence of water systems as the outlet, and then use these sub-basins as the overall site selection area. The third step is to select a sub-basin. Within the selected site area, starting from the outlet, move the dam axis from downstream to upstream, perpendicular to the water system, along the water system, with k as the moving step. Every k steps the dam axis moves, it intersects the water system at point C and the boundary of the site area at two points. The fourth step is to determine the dam length, dam height, normal water level elevation, and corresponding area of ​​the reservoir, including the following steps: (1) Compare the elevation values ​​of the two points at the boundary of the intersecting site selection area obtained in the third step, take the lower value point as an endpoint B1 of the dam axis, and use this lower value point as the starting point to search for the same elevation value point in the site selection area. (2) When points with the same elevation as B1 can be connected in the site selection area to form contour lines that intersect with the dam axis and enclose a closed area, the point where the contour lines intersect with the dam axis is taken as the endpoint, which is the other endpoint B2 of the dam axis. (3) When points with the same elevation as B1 can be connected in the site selection area to form contour lines that intersect the dam axis, but cannot form a closed area, or when points with the same elevation as B1 cannot be connected in the site selection area to form contour lines that intersect the dam axis, the elevation of B1 is reduced along the dam axis with k as the step size, and (2) is repeated until the condition is met. (4) The normal water level elevation is to be the same as B1, denoted as H; the closed area enclosed by the contour line containing the normal water level elevation and the dam axis is the normal water level area, denoted as F; the distance between B1 and B2 is the dam length, denoted as L; the elevation of point C is the dam bottom elevation, denoted as H. 底 The dam height is to be the difference between the normal water level and the dam base elevation, denoted as Z = HH. 底 ; Fifth step: When moving k steps at point C, determine the reservoir parameters at that location—H, F, L, Z, and calculate the reservoir volume V based on the geographical elevation data; Step 6: When point C moves by one k steps, considering the dam length L and dam height Z, compare the current reservoir capacity with the capacity at the previous position. If the reservoir capacity is greater than the previous position, the current dam axis position is considered better; otherwise, the previous position is considered better. The specific constraints are as follows: In the formula, V i V i+1 The reservoir capacity is the amount of water when the dam axis moves k steps. The local optimal position of the dam axis can be determined using the above method. When the local optimal position is obtained, the reservoir index parameters at that position are stored. Taking the reservoir capacity as the determining factor, the position of the dam axis with the maximum reservoir capacity is taken as the global optimal position in the site selection area, and the reservoir site is proposed. Step 7: Using the location of the next sub-basin as the new starting point, repeat steps 3 to 6 to continue traversing until the reservoir site for each sub-basin has been determined, with one reservoir site corresponding to one sub-basin. Step 8: Among the proposed reservoir sites, locate the upper and lower reservoirs; the remaining sites are invalid. Using the lower reservoir as the center, connect point C, the optimal location of the upper and lower reservoirs, within a certain range. This line represents the horizontal distance S between the two reservoirs. The difference in normal water level between the upper and lower reservoirs is used as the average head of the power station. Using the distance-to-height ratio as a screening criterion, the upper and lower reservoirs of the power station are matched to complete the site selection.

2. The method for selecting a site for a pumped storage power station according to claim 1, characterized in that, The geographic elevation data mentioned in the first step is either DEM data or contour line data. DEM data can be downloaded from a website, while contour line data is measured or simulated contour line data.

3. The method for selecting a site for a pumped storage power station according to claim 2, characterized in that, In the first step, ArcGIS is used to generate water systems in areas with certain water catchment capacity based on geographic elevation data, and a water system model is constructed. In the second step, ArcGIS is used to divide the area into several sub-basins.

4. The method for selecting a site for a pumped storage power station according to claim 3, characterized in that, The fifth step includes: when the input data is DEM data, using ArcGIS's raster-to-TIN function to convert the DEM data into TIN data; when the input data is contour data, using ArcGIS to extract the elevation data into Shapefile format, and creating TIN data accordingly; and determining the reservoir parameters—H, F, L, Z—at point C every k steps, and calculating the reservoir volume V using ArcGIS's surface volume function, as shown in the following expression: V = f(TIN, Polygon_F, H, BELOW) In the formula, TIN is the TIN data; Polygon_F is the areal feature corresponding to the normal water level; H is the elevation value of the normal water level; BELOW is the calculation parameter; V is the volume between the selected areal feature and the TIN data below it, which is the reservoir volume.

5. The method for selecting a site for a pumped storage power station according to claim 2, characterized in that, The value of k in the third step is determined based on the accuracy of the geographic elevation data, with the following specific constraints: (1) If the spatial resolution accuracy of the DEM is less than or equal to 10m×10m, or the contour scale is ≤1:10000, the k value is 10m. (2) If the spatial resolution accuracy of the DEM is less than or equal to 5m×5m, or the contour scale is ≤1:5000, the k value is 5m. (3) If the spatial resolution accuracy of the DEM is higher than 5m×5m, or the contour scale is greater than 1:5000, the k value is 2m.

6. The method for selecting a site for a pumped storage power station according to claim 1, characterized in that, In step six, based on practical engineering experience, Z 限 =150m, L 限 =2000m.

7. The method for selecting a site for a pumped storage power station according to claim 1, characterized in that, In the eighth step, at the proposed storage site, a storage capacity of between 5 million cubic meters will be selected. 3 With 10 million m 3 The reservoir site will be located between [locations], with a capacity greater than 10 million cubic meters. 3 The reservoir is located at the designated location; all other reservoir sites are invalid. Taking the lower reservoir as the center, within a range of no more than 5km, connect point C, whose optimal location between the upper and lower reservoirs has been determined, and use the line as the horizontal distance S between the upper and lower reservoirs. The difference in normal water level elevation between the upper and lower reservoirs is used as the average head of the power station. With height ratio Using a threshold of 10 as a screening criterion, the upper and lower reservoirs of the power station are matched to complete the site selection process.

8. A data processing terminal for implementing the pumped storage power station site selection method according to any one of claims 1-7.

9. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the pumped storage power station site selection method as described in any one of claims 1-7.

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