Method and system for automatically determining dam site of whole-reservoir anti-seepage pumped storage reservoir

Abstract

The invention belongs to the technical field of reservoir dam line design, and provides an automatic determining method and system for a dam site of a whole-reservoir anti-seepage pumped storage reservoir. The method comprises the following steps: S1, extracting a contour line of a terrain curved surface corresponding to the elevation of a hydropower station; s2, selecting a contour line with the largest enclosed area range; s3, generating a convex hull for the selected contour line; s4, poles of the convex hulls are connected into a plurality of straight line sections li, the poles cut off the contour line into a plurality of curved line sections pli, and i closed areas are defined by the straight line sections li and the curved line sections pli; s5, selecting a closed area of which the volume is greater than a preset value V; s6, traversing a point j on the curve segment pli, drawing a vertical line nj from the point j to the straight line segment li, calculating the length hj of the vertical line nj, obtaining the length hijmax of the longest vertical line of each closed area, and calculating the ratio k of the hijmax to the straight line segment li; s7, setting a threshold value a, and selecting kgt; a closed area of a is used as a selected dam address. The method can accurately select sites, reduces man-made interference, and is suitable for various terrain environments.

Description

Technical Field

[0001] The present invention belongs to the technical field of reservoir dam line design, and particularly relates to a method and system for automatically determining the site of a fully reservoir-sealed pumped-storage reservoir dam. Background Art

[0002] The selection of the dam site is one of the key tasks in the construction of a hydropower station, directly affecting the safety, economy and environmental impact of the project. The traditional selection of the pumped-storage reservoir dam site mainly relies on manual exploration and empirical judgment, with problems such as low efficiency, high cost and strong subjectivity. With the rapid development of remote sensing technology, geographic information system (GIS) and artificial intelligence technology, it has become possible to use algorithms to quickly and automatically screen out the dam sites that meet the engineering and environmental requirements from topographic maps, which will greatly improve the efficiency and scientific nature of project construction. When selecting the reservoir dam site based on GIS, relevant geospatial data can be processed and analyzed, such as topographic analysis, hydrological analysis, geological analysis, etc. However, GIS analysis mainly relies on manually set rules and thresholds, is difficult to handle complex non-linear relationships, and lacks learning ability and cannot automatically extract knowledge from historical data. When transforming the dam site selection problem into a multi-objective decision-making problem, methods such as the analytic hierarchy process (AHP) and fuzzy comprehensive evaluation method can be used to comprehensively evaluate and rank the candidate dam sites. However, this method has defects such as strong subjectivity and difficulty in determining weights, and is difficult to handle high-dimensional and non-linear complex data.

[0003] Therefore, if it is possible to automatically and quickly select the geographical locations that meet the engineering and environmental requirements from topographic maps through algorithms and use them for the selection and construction of fully reservoir-sealed pumped-storage reservoir dams, the efficiency of project construction can be effectively improved. Summary of the Invention

[0004] The present invention aims to provide a method and system for automatically determining the site of a fully reservoir-sealed pumped-storage reservoir dam for the technical problems existing in the prior art. This method and system can automatically, accurately and efficiently select the site of the pumped-storage power station reservoir dam, greatly reducing the interference of human judgment and being applicable to the determination of dam sites in various terrain environments.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A method for automatically determining the site of a fully reservoir-sealed pumped-storage reservoir dam includes the following steps:

[0007] S1. Obtain the elevation information of the pumped-storage power station and extract the contour lines of the topographic surface corresponding to the elevation of the power station;

[0008] S2. Select the contour line with the largest area enclosed by the closed contour lines from the contour lines of the topographic surface extracted in step S1;

[0009] S3. Generate a convex hull based on the selected contour lines in step S2;

[0010] S4. Connect the extreme points of the convex hull into multiple straight line segments l i , and the extreme points truncate the contour lines into multiple curve segments pl i , multiple straight line segments l i and multiple curve segments pl i enclose i closed regions;

[0011] S5. Select the closed regions with a volume greater than the preset value V;

[0012] S6. Obtain the closed regions selected in step S5, traverse the points j on the curve segment pl i , draw a perpendicular line n i from point j to the straight line segment l j , calculate the length h j of the perpendicular line n j , obtain the length h of the longest perpendicular line for each closed region ij max , calculate h ij max and the ratio k of h i to the straight line segment l;

[0013] S7. Set a threshold a, and select the closed regions with k > a as the selected reservoir dam sites.

[0014] Optionally, in step S2, the extracted contour lines include closed contour lines and unclosed contour lines. Connect the start and end points of the unclosed contour lines to form closed contour lines, and obtain multiple closed contour lines.

[0015] Optionally, step S3 is specifically: Obtain the selected contour lines, traverse each vertex on the contour lines, and use the Jarvis March algorithm to continuously find the farthest point in the counterclockwise direction of the current vertex to construct a convex hull until returning to the starting point to obtain a complete convex hull.

[0016] Optionally, in step S5, calculate the area S i of each closed region, and calculate the volume V i of each closed region according to the elevation information, and select the closed regions with the volume V i greater than the preset value V.

[0017] Optionally, in step S6, use the Jarvis March algorithm to traverse the points j on the curve segment pl i .

[0018] Optionally, in step S7, the value of the threshold a is 0.75.

[0019] Optionally, it further includes the determination of the dam axis, specifically:

[0020] P1. Obtain the selected closed area in step S7, where the curve segment of this closed area is pl 坝 , and the straight line segment is l 坝 ;

[0021] P2. Traverse the points φ on the curve segment pl 坝 from one end point of the curve segment pl 坝 . Connect the point φ and the next point φ + 1 to form a line segment u φ . Make a ray from the point φ in the direction parallel to the straight line segment l 坝 . The intersection point of the ray and the curve segment pl 坝 is φ 交 . Connect the point φ and the intersection point φ 交 to form a line segment v φ . When the included angle between the line segment u φ and the line segment v φ is greater than the preset angle β, stop traversing, and retain the line segment v φ ' formed by connecting the points where the included angle is greater than the preset angle β and the intersection points;

[0022] P3. Simultaneously with step P2, traverse the points 坝 on the curve segment pl 坝 from the other end point of the curve segment pl Point and the next point to form a line segment From the point make a ray in the direction parallel to the straight line segment l 坝 . The intersection point of the ray and the curve segment pl 坝 is Point and the intersection point to form a line segment When the line segment and the line segment have an included angle greater than the preset angle β, stop traversing, and retain the line segment

[0023] P4. Compare the perpendicular distances from the line segment v φ ', the line segment to the straight line segment l 坝 , and retain the line segment with the shorter perpendicular distance as the dam axis.

[0024] Optionally, the value of the preset angle β is 60°.

[0025] The present invention also provides an automatic determination system for the dam site of a fully reservoir-sealed pumped-storage power station. This system uses the automatic determination method for the dam site of a fully reservoir-sealed pumped-storage power station as described above, and includes a contour automatic generation module, a contour automatic determination module, a convex hull algorithm module, a region division module, a region intelligent evaluation module, and a dam site selection module;

[0026] The contour automatic generation module is used to obtain the elevation information of the pumped-storage power station and extract the contour lines of the terrain surface corresponding to the elevation of the power station;

[0027] The contour automatic determination module is used to obtain the contour lines extracted by the contour automatic generation module and select the contour line with the largest area range;

[0028] The convex hull algorithm module is used to generate a convex hull for the contour line selected by the contour automatic determination module;

[0029] The region division module is used to connect the poles of the convex hull into multiple straight line segments l i The poles truncate the contour line into multiple curve segments pl i The multiple straight line segments l i and the multiple curve segments pl i enclose i closed regions;

[0030] The region intelligent evaluation module is used to select the closed regions with a volume greater than the preset value V, and traverse the points j on the curve segment pl i From the j point, draw a perpendicular line n i to the straight line segment l j Calculate the length h j of the perpendicular line n j Obtain the length h of the longest perpendicular line for each closed region ij max Calculate the ratio k of h ij max to the straight line segment l i ;

[0031] The dam site selection module is used to design a threshold a and select the closed regions with k > a as the selected dam sites.

[0032] Optionally, it further includes a dam axis determination module, which is used to obtain the closed region selected by the dam site selection module and traverse the points on the curve segment to obtain the dam axis.

[0033] Compared with the prior art, the beneficial effects produced by the present invention are:

[0034] (1) By combining the convex hull algorithm with parametric calculation, the present invention realizes the automatic, accurate and efficient site selection of the dam of the pumped-storage power station. This screening process greatly reduces the interference of human judgment and is applicable to the determination of dam sites in various terrain environments;

[0035] (2) The present invention uses the Jarvis March algorithm, which can traverse the point data on the contour line, construct a complete convex hull, and determine the reservoir dam address by calculating the ratio of the longest perpendicular line in the closed area to the straight line segment. The selected reservoir dam site is more accurate and objective based on this, overcoming the subjectivity of traditional manual site selection.

[0036] (3) Based on the selected reservoir dam address, the present invention traverses the points on the curve segment pl 坝 starting from both endpoints of the curve segment pl 坝 simultaneously, selects two line segments with an included angle greater than a preset angle, and compares the perpendicular distances from the two line segments to the straight line segment l 坝 . The line segment with the farther perpendicular distance is retained as the dam axis. The dam axis obtained through precise calculation is more accurate, avoiding the errors caused by manual calculation, reducing the workload, realizing the automatic, precise and efficient determination of the reservoir dam site and the dam axis of the pumped-storage power station, greatly reducing the interference of human judgment, and being applicable to the determination of dam sites in various terrain environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a flowchart of the method for automatically determining the full-reservoir anti-seepage pumped-storage reservoir dam site according to an embodiment of the present invention;

[0038] Figure 2 is a three-dimensional schematic diagram of the contour line extracted according to an embodiment of the present invention;

[0039] Figure 3 is a three-dimensional schematic diagram of the closed contour line according to an embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of the convex hull according to an embodiment of the present invention;

[0041] Figure 5 is a schematic diagram of the closed area according to an embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of the longest perpendicular line in the closed area according to an embodiment of the present invention;

[0043] Figure 7 is a schematic diagram of the determination of the dam axis according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Example 1

[0046] Combine Figure 1 As shown, the embodiment of the present invention provides an automatic determination method for the dam site of a fully impermeable pumped - storage reservoir, including the following steps:

[0047] S1. Obtain the elevation information of the pumped - storage power station, and extract the contour lines of the terrain surface corresponding to the elevation of the hydropower station;

[0048] S2. Select the contour line with the largest area enclosed by the closed contour lines from the contour lines of the terrain surface extracted in step S1;

[0049] S3. Generate a convex hull according to the contour line selected in step S2;

[0050] S4. Connect the poles of the convex hull into multiple straight - line segments l i , the poles truncate the contour line into multiple curve segments pl i , the multiple straight - line segments l i and the multiple curve segments pl i enclose i closed regions;

[0051] S5. Select the closed regions with a volume greater than the preset value V;

[0052] S6. Obtain the closed regions selected in step S5, traverse the points j on the curve segment pl i , draw a perpendicular line n i from the j - point to the straight - line segment l j , calculate the length h j of the perpendicular line n j , obtain the length h ij max of the longest perpendicular line for each closed region ij max , calculate the ratio k i of h

[0053] S7. Set a threshold a, and select the closed regions with k > a as the selected dam site.

[0054] Example 2

[0055] The embodiment of the present invention provides an automatic determination method for the dam site of a fully impermeable pumped - storage reservoir, including the following steps:

[0056] S1. Obtain the elevation information of the pumped - storage power station, and extract the contour lines of the terrain surface corresponding to the elevation of the hydropower station;

[0057] S2. Select the contour line with the largest area enclosed by the closed contour lines from the contour lines of the terrain surface extracted in step S1;

[0058] S3. Generate a convex hull based on the selected contour lines in step S2;

[0059] S4. Connect the extreme points of the convex hull into multiple straight line segments l i , and the extreme points truncate the contour lines into multiple curve segments pl i , the multiple straight line segments l i and the multiple curve segments pl i enclose i closed regions;

[0060] S5. Select the closed regions with a volume greater than the preset value V;

[0061] S6. Obtain the closed regions selected in step S5, traverse the points j on the curve segment pl i , draw a perpendicular line n i from the point j to the straight line segment l j , calculate the length h j of the perpendicular line n j , obtain the length h of the longest perpendicular line for each closed region ij max , calculate the ratio k of h ij max to the straight line segment l i ;

[0062] Specifically, as Figure 6 shown, an example of the longest perpendicular lines for the closed regions ①②③ with a volume greater than the preset value V is given.

[0063] S7. Set a threshold a, and select the closed regions with k > a as the selected reservoir dam sites;

[0064] On this basis, in this embodiment, in step S2, the extracted contour lines include closed contour lines and unclosed contour lines. Connect the head and tail points of the unclosed contour lines to form closed contour lines, and obtain multiple closed contour lines;

[0065] Specifically, as Figure 2 and Figure 3 shown, assume that the extracted contour lines include a closed contour line F and an unclosed contour line G. Connect the head and tail points of the unclosed contour line (i.e., connect the head and tail points of the contour line along the dotted line H), and obtain two closed contour lines F and G'.

[0066] As a preferred method, in step S3, the specific method for generating the convex hull is: obtain the selected contour lines, traverse each vertex on the contour lines, and use the Jarvis March algorithm to continuously find the farthest point in the counterclockwise direction of the current vertex to construct the convex hull until returning to the starting point to obtain the complete convex hull;

[0067] Furthermore, in step S5, calculate the area S of each closed region i, and calculate the volume V of each enclosed area according to the elevation information i , select the volume V i , and select the enclosed areas with the volume V greater than the preset value V; specifically, the calculation processes of the enclosed area area and the volume are prior arts and will not be elaborated here; in this embodiment, as Figure 6 shown, the enclosed areas with the volume V i greater than the preset value V are the enclosed areas ①②③.

[0068] Specifically, as Figure 4 shown, assuming that the selected contour line is G’, traverse each vertex on the contour line until returning to the starting point to obtain a complete convex hull;

[0069] As Figure 5 shown, the poles of the convex hull are connected into multiple straight line segments l i , and the poles truncate the contour line into multiple curve segments pl i , the multiple straight line segments l i and the multiple curve segments pl i enclose i enclosed areas. In this embodiment, 7 enclosed areas are enclosed.

[0070] As a preferred method, in step S5, the Jarvis March algorithm is used to traverse the points j on the curve segment pl i .

[0071] As a preferred method, the value of the threshold a can be 0.75.

[0072] Embodiment 3

[0073] The embodiment of the present invention provides an automatic determination method for the dam site of a fully impervious pumped-storage power station, including the following steps:

[0074] S1. Obtain the elevation information of the pumped-storage power station and extract the contour lines of the topographic surface corresponding to the elevation of the hydropower station;

[0075] S2. Select the contour line with the largest area range enclosed by the closed contour lines from the contour lines of the topographic surface extracted in step S1;

[0076] S3. Generate a convex hull according to the contour line selected in step S2;

[0077] S4. Connect the poles of the convex hull into multiple straight line segments l i , and the poles truncate the contour line into multiple curve segments pl i , the multiple straight line segments l i and the multiple curve segments pl i enclose i enclosed areas;

[0078] S5. Select the enclosed areas with the volume greater than the preset value V;

[0079] S6. Get the closed area selected in step S5 and traverse the curve segment pl i Point j on the line segment l i Plumb line n j , calculate the perpendicular line n j Length h j , get the length h of the longest perpendicular line in each closed area ij max , calculate h ij max With the straight line segment l i The ratio k;

[0080] S7, setting a threshold a, and selecting a closed area where k>a as the selected reservoir dam address;

[0081] On this basis, in this embodiment, the method for automatically determining the dam site of the full-reservoir anti-seepage pumped storage reservoir also includes determining the dam axis, specifically:

[0082] P1, obtain the closed area selected in step S7, the curve segment pl of the closed area 坝 , the straight line segment is l 坝 ;

[0083] P2, from the curve segment pl 坝 One endpoint traverses the curve segment pl 坝 Point φ on the line is connected to the next point φ+1 by a line segment u. φ , from point φ to a line parallel to the line segment l 坝 Make a ray in the direction of the curve segment pl 坝 The intersection point is φ 交 , point φ and intersection point φ 交 Connect into line segment v φ , when line segment u φ With line segment v φ When the angle between the two points is greater than the preset angle β, stop traversing and keep the line segment v formed by connecting the point where the angle is greater than the preset angle β and the intersection point φ ';

[0084] P3, and step P2 at the same time, from the curve segment pl 坝 The other endpoint traverses the curve segment pl 坝 Point on point With the next point Connect into line segments From point Parallel to the straight line segment l 坝 Make a ray in the direction of the curve segment pl 坝 The intersection point is point Intersection Connect into line segments When the line segment With line segment When the angle between the two points is greater than the preset angle β, stop traversing and keep the line segment formed by the point where the angle is greater than the preset angle β and the intersection point.

[0085] P4. Compare line segments Line segment To the straight line segment l 坝 The vertical distance between the two sides is 1 / 4, and the line segment with the shorter vertical distance is retained as the dam axis;

[0086] Specifically, if Figure 7 As shown, the line segment With line segment The angle is α, at this time α>β, retain the line segment Line segment With line segment The angle is α', at this time α'>β, retain the line segment Comparing Line Segments Line segment To the straight line segment l 坝 The vertical distance between the two sides is 0.01mm and 0.02mm, and the line segment with the shorter vertical distance is retained as the dam axis.

[0087] The preset angle β may be set to 60°.

[0088] Example 4

[0089] An embodiment of the present invention further provides a system for automatically determining the dam site of a full-reservoir anti-seepage pumped storage reservoir. The system is applicable to the method for automatically determining the dam site of a full-reservoir anti-seepage pumped storage reservoir as described above, and includes a contour line automatic generation module, a contour line automatic determination module, a convex hull algorithm module, a region division module, a region intelligent evaluation module, and a reservoir and dam address selection module.

[0090] The automatic contour generation module is used to obtain the elevation information of the pumped storage power station and extract the contour lines of the terrain surface corresponding to the elevation of the hydropower station;

[0091] The contour line automatic determination module is used to obtain the contour lines extracted by the contour line automatic generation module and select the contour line with the largest area range;

[0092] The convex hull algorithm module is used to generate the convex hull for the contour lines selected by the contour line automatic determination module;

[0093] The region partitioning module is used to connect the extreme points of the convex hull into multiple straight line segments l i , the extreme points cut the contour lines into multiple curve segments pl i , multiple straight line segments l i and multiple curve segments pli enclose i closed regions;

[0094] The area intelligent evaluation module is used to select the closed regions with a volume greater than the preset value V, and traverse the curve segment pl i for the point j on it, draw a perpendicular line n i from the point j to the straight line segment l j , calculate the length h j of the perpendicular line n j , and obtain the length h of the longest perpendicular line for each closed region ij max , calculate h ij max and the ratio k of h i to the straight line segment l;

[0095] The reservoir dam address selection module is used to design the threshold a, and select the closed regions with k > a as the selected reservoir dam addresses;

[0096] Furthermore, it also includes a dam axis determination module, which is used to obtain the closed regions selected by the reservoir dam address selection module, and traverse the points on the curve segment to obtain the dam axis.

[0097] The above are only the embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the scope of the application of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic determination method for the dam site of a fully reservoir-sealed pumped-storage power station, characterized in that, It includes the following steps: S1. Obtain the elevation information of the pumped-storage power station, and extract the contour lines of the terrain surface corresponding to the elevation of the hydropower station; S2. Select the contour line with the largest area enclosed by the closed contour lines from the contour lines of the terrain surface extracted in step S1; S3. Generate a convex hull according to the contour line selected in step S2; S4. Connect the extreme points of the convex hull into multiple straight line segments l i , and the extreme points truncate the contour line into multiple curved line segments pl i . The multiple straight line segments l i and the multiple curved line segments pl i enclose i closed regions; S5. Select the closed area with a volume greater than the preset value V; S6. Obtain the selected closed region in step S5, and traverse the points j on the curve segment pl i to draw a perpendicular line n from the point j to the straight line segment l i and calculate the length h of the perpendicular line n j to obtain the length h of the longest perpendicular line in each closed region j and calculate the ratio k of h j to the straight line segment l ij max ; ij max i ​​ S7. Set a threshold a, and select the closed area with k > a as the selected reservoir dam site; 2. The automatic determination method of the dam site of the fully impervious pumped-storage reservoir according to claim 1, characterized in that, In step S2, the extracted contour lines include closed contour lines and unclosed contour lines. Connect the head and tail points of the unclosed contour lines to form closed contour lines, and obtain multiple closed contour lines; 3. The automatic determination method of the dam site of the fully reservoir-sealed pumped storage power station according to claim 1, characterized in that Step S3 is specifically: Obtain the selected contour line, traverse each vertex on the contour line, and use the Jarvis March algorithm to continuously find the farthest point in the counterclockwise direction of the current vertex to construct a convex hull until returning to the starting point to obtain a complete convex hull; 4. The automatic determination method of the dam site of the fully impermeable pumped storage reservoir according to claim 1, wherein, In step S5, calculate the area S of each closed region i , and calculate the volume V of each closed region according to the elevation information i , select the closed regions with volume V i greater than the preset value V.

5. The automatic determination method for the dam site of the fully reservoir-sealed pumped-storage reservoir according to claim 1, characterized in that In step S6, the Jarvis March algorithm is used to traverse the points j on the curve segment pl i .

6. The automatic determination method of the dam site of the fully impermeable pumped-storage reservoir according to claim 1, characterized in that, In step S7, the value of the threshold a is 0.75; 7. The automatic determination method of the dam site of the fully impermeable pumped-storage reservoir according to claim 1, characterized in that, It also includes the determination of the dam axis, specifically: P1. Obtain the selected closed area in step S7, where the curve segment of this closed area is pl 坝 , and the straight-line segment is l 坝 ; P2. From an endpoint of the curve segment pl 坝 traverse the points φ on the curve segment pl 坝 , connect the point φ with the next point φ + 1 to form a line segment u φ . From the point φ, draw a ray in the direction parallel to the straight line segment l 坝 . The intersection point of the ray and the curve segment pl 坝 is φ 交 . Connect the point φ with the intersection point φ 交 to form a line segment v φ . When the included angle between the line segment u φ and the line segment v φ is greater than the preset angle β, stop traversing, and retain the line segment v φ ' formed by connecting the points where the included angle is greater than the preset angle β and the intersection points; P3, performed simultaneously with step P2, traverse the curve segment pl from the other endpoint of the curve segment pl 坝 Connect the points 坝 on the curve segment pl point with the next point to form a line segment From the point draw a ray parallel to the straight line segment l 坝 The intersection point of the ray and the curve segment pl 坝 is point Connect the intersection point to form a line segment When the included angle between the line segment and the line segment is greater than the preset angle β, stop traversing, and retain the line segment formed by connecting the points and the intersection points when the included angle is greater than the preset angle β P4. Compare line segments Line segment to the straight line segment l 坝 The perpendicular distance, and retain the line segment with the shorter perpendicular distance as the dam axis line.

8. The automatic determination method of the dam site of the fully impermeable pumped-storage reservoir according to claim 7, characterized in that, The preset angle β takes a value of 60°; 9. An automatic determination system for the dam site of a fully reservoir-sealed pumped-storage power station, characterized in that, It is applicable to the automatic determination method of the full-reservoir anti-seepage pumped-storage reservoir dam site described in any one of claims 7-8, including a contour line automatic generation module, a contour line automatic determination module, a convex hull algorithm module, a region division module, a region intelligent evaluation module, and a reservoir dam site selection module; The contour line automatic generation module is used to obtain the elevation information of the pumped-storage power station and extract the contour lines of the terrain surface corresponding to the elevation of the hydropower station; The contour line automatic determination module is used to obtain the contour lines extracted by the contour line automatic generation module and select the contour line with the largest area range; The convex hull algorithm module is used to generate a convex hull for the contour line selected by the contour line automatic determination module; The region division module is used to connect the extreme points of the convex hull into multiple straight line segments l i , and the extreme points truncate the contour line into multiple curved line segments pl i , the multiple straight line segments l i and the multiple curved line segments pl i enclose i closed regions; The regional intelligent evaluation module is used to select a closed area with a volume greater than a preset value V, and traverse the curve segment pl i for the point j on it, draw a perpendicular line n i from the point j to the straight line segment l j , calculate the length h j of the perpendicular line n j , and obtain the length h of the longest perpendicular line in each closed area ij max , calculate h ij max and the ratio k of the straight line segment l i ; The reservoir dam site selection module is used to design a threshold a and select the closed area with k > a as the selected reservoir dam site; 10. The automatic determination system for the dam site of the fully reservoir-sealed pumped-storage power station according to claim 9, characterized in that, It also includes a dam axis determination module, which is used to obtain the closed area selected by the reservoir dam site selection module and traverse the points on the curve segment to obtain the dam axis.

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