CN116151421A - Pumped storage power station address selection method, data processing terminal and readable storage medium - Google Patents
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Abstract
The invention discloses a pumped storage power station site selection method, a data processing terminal and a readable storage medium, wherein hydrologic analysis is carried out to a water system model through digital elevation data processing; taking a water system intersection point as a drainage outlet, dividing a drainage basin according to the drainage basin, and planning an address selection area; in the site selection area, a traversing algorithm is adopted to move the dam axis from the downstream to the upstream of the water system, and the factors such as the length of the dam axis, the height of the dam and the like are considered, and the maximum storage capacity is taken as the target to draw the dam axis; and (3) dividing the upper reservoir and the lower reservoir according to the calculation result of the reservoir capacity, and matching the upper reservoir and the lower reservoir through the distance-to-height ratio to finally finish reservoir address planning. Compared with the traditional manual pumped storage power station site selection, the invention provides a theoretical method for simultaneously carrying out the large-scale multi-area pumped storage power station site selection.
Description
Technical Field
The invention relates to a pumped storage power station site selection method, in particular to a method for simultaneously carrying out large-scale multi-area pumped storage power station site selection, a data processing terminal and a readable storage medium based on a geographic information system through hydrologic analysis and a traversal algorithm.
Background
The development of the pumped storage power station is in the peak period of construction, and the site selection of the power station is important. The site selection of the pumped storage power station needs to consider the requirements of water source conditions, water heads, reservoir capacity, distance-to-height ratio of the upper reservoir and the lower reservoir, geographic position, geological conditions and the like, and is a work with numerous influencing factors, time and labor consumption 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 on a topographic map manually. The manual site selection mainly uses the stock capacity as large as possible and the ratio of the upper stock distance to the lower stock distance as the site selection standard according to the trend of the terrain, and the manual site selection has the disadvantages of long time, errors caused by experience judgment and insufficient screening range, and an automatic standardized site selection method is needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pumped storage power station site selection method, a data processing terminal and a readable storage medium, wherein large-scale multi-area site selection can be carried out at the same time in a preliminary site selection stage.
The technical scheme adopted by the invention is as follows: a pumped storage power station site selection method comprises the following steps:
firstly, obtaining geographic elevation data, generating a water system in an area with certain water collecting capacity according to the geographic elevation data, and constructing a water system model;
secondly, taking a water system intersection as a drainage outlet, dividing a plurality of sub-drainage basins, and taking the plurality of sub-drainage basins as a total site selection area;
thirdly, selecting a sub-drainage basin, taking a drainage outlet as a starting point in a selected site selection area, taking k as a moving step length from downstream to upstream, and vertically water system, moving a dam axis along a water system, wherein each time the dam axis moves by k step length, water crossing is carried out at a point C, and the boundary of the site selection area is crossed at two points;
fourth, determining the dam length, dam height, normal water level elevation and corresponding area of the reservoir, comprising the following steps:
(1) Comparing the elevation values of the two points of the boundary of the cross-site selection area obtained in the third step, and taking the low-value point as one endpoint B of the dam axis 1 Searching the value points with the same height in the address selecting area by taking the low value point as a starting point;
(2) When with B 1 The points with the same elevation can be connected into a contour line intersecting with the dam axis in the site selection area and enclose a closed area, and the point of intersection of the contour line and the dam axis is taken as the end point to serve as the other end point B of the dam axis 2 ；
(3) When with B 1 The points of the same elevation can be connected in the addressing area to form a contour intersecting the dam axis but not enclosing a closed area, or when connected with B 1 Points of the same elevation cannot be connected to form a contour intersecting the dam axis in the addressing area, and B is lowered along the dam axis with k as a step length 1 Repeating (2) until the condition is satisfied;
(4) The normal water level elevation is designed to be equal to B 1 The same, denoted as H; the enclosed area surrounded by the contour line of the normal water storage level elevation and the dam axis is the normal water storage level area, and is marked as F; b (B) 1 And B is connected with 2 The distance of (2) is the dam length and is marked as L; the elevation of the point C is the height of the dam bottom Gao Chengji is H Bottom The dam height is defined as the difference between the normal water level and the elevation of the dam bottom, denoted as z=h-H Bottom ；
Fifthly, determining a reservoir parameter H, F, L, Z at the position when the point C moves by k step lengths, and calculating reservoir volume V according to the geographic elevation data;
sixth, when the point C moves by one k step, under the condition of considering the factors of the dam length L and the dam height Z, comparing the storage capacity at the moment with the storage capacity at the last position, and when the storage capacity is larger than the last position, considering that the position of the axis of the dam at the moment is better, otherwise, considering that the last moment is better, and specifically restricting as follows:
wherein V is i 、V i+1 The storage capacity is the storage capacity of each time the dam axis moves by k step sizes;
according to the mode, the local optimal position of the dam axis can be determined, and when the local optimal position is obtained, reservoir index parameters of the position are stored; taking the reservoir capacity condition as a determining factor, taking the dam axis position with the maximum reservoir capacity as a global optimal position in the site selection area, and drawing up a reservoir address;
seventh, taking the position of the next sub-drainage basin as a new starting point, repeating the third step to the sixth step to continue traversing until each sub-drainage basin is subjected to reservoir address establishment, wherein one sub-drainage basin corresponds to one reservoir address;
eighth, in the planned reservoir address, positioning an upper reservoir and a lower reservoir, and the rest reservoir addresses are invalid reservoir addresses; taking the lower reservoir as the center, connecting the C point of the determined optimal position of the upper reservoir and the lower reservoir in a certain range as the horizontal distance S of the upper reservoir and the lower reservoir, and taking the difference value of the normal water storage level elevation of the upper reservoir and the lower reservoir as the average water head of a power station
And (3) taking the pitch-height ratio as a screening condition, and matching the upper and lower libraries of the power station to finish site selection.
Preferably, in the first step, the geographical elevation data is DEM data or contour data, the DEM data is downloaded through a website, and the contour data is actually measured or simulated contour data.
Preferably, in the first step, a water system is generated in an area with certain water collecting capacity by utilizing ArcGIS according to geographic elevation data, and a water system model is constructed; in the second step, a plurality of sub-basins are divided by arcGIS.
Preferably, the fifth step includes, when the input data is DEM data, converting the DEM data into TIN data by using a grid-to-TIN function of ArcGIS; when the input data is contour data, extracting the elevation data into a shape format by using an ArcGIS, and creating TIN data according to the extracted elevation data; when the point C moves by k step sizes, determining a reservoir parameter-H, F, L, Z at the position, and calculating a reservoir volume V by using the surface volume function of the ArcGIS, wherein the expression is as follows:
V＝f(TIN,Polygon_F,H,BELOW)
wherein TIN is TIN data; polygon_F is a planar element corresponding to a normal water storage level; h is the elevation value of the normal water storage level; BELOW is a calculation parameter; v is the volume between the selected planar element and the TIN data below it, i.e. the reservoir volume.
Preferably, the k value in the third step is taken according to the accuracy of the geographic elevation data, and the specific constraint is as follows:
(1) If the DEM spatial resolution precision is lower than or equal to 10m multiplied by 10m, or the contour scale is less than or equal to 1:10000, the k value is 10m;
(2) If the spatial resolution precision of the DEM is lower than or equal to 5m multiplied by 5m, or the contour scale is less than or equal to 1:5000, the k value is 5m;
(3) If the DEM spatial resolution precision is higher than 5m multiplied by 5m or the contour scale is more than 1:5000, the k value takes 2m.
Preferably, in the sixth step, Z is determined based on actual engineering experience Limiting the limit ＝150m，L Limiting the limit ＝2000m。
Preferably, in the eighth step, in the planned reservoir address, the reservoir capacity is between 500 ten thousand m 3 And 1000 ten thousand m 3 The reservoir address between the two is positioned to be filled in the reservoir, and the reservoir capacity is more than 1000 ten thousand m 3 The rest reservoir addresses are invalid reservoir addresses; taking the lower reservoir as the center, connecting the C point of the determined optimal position of the upper reservoir and the lower reservoir within the range of not more than 5km as the horizontal distance S of the upper reservoir and the lower reservoir, and taking the difference value of the normal water storage level elevation of the upper reservoir and the lower reservoir as the average water head of a power station
In a ratio of distance to height->
And (5) taking the power station with the power not more than 10 as a screening condition, and matching the upper and lower libraries of the power station to finish site selection.
And the data processing terminal is used for realizing the pumped storage power station address selection method.
A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform a pumped storage power plant site selection method as described above.
The method has the beneficial effects that the factors such as water source conditions, water heads, reservoir capacity, distance-to-height ratio of the upper reservoir and the lower reservoir are comprehensively considered in combination with the geographic elevation data, hydrologic analysis and traversal algorithm are taken as main ideas to perform optimal dam address selection, the conditions of flow and programming are provided, the traditional manual address selection method is improved by combining ArcGIS and programs, the large-scale multi-region address selection work can be simultaneously carried out, and the working efficiency and the working precision are greatly improved.
Drawings
FIG. 1 is a flow chart of the pumped storage power station site selection method of the present invention;
FIG. 2 is a digital elevation acquisition display of the method of the present invention;
FIG. 3 is a view showing the generation of a water system model according to the method of the present invention;
FIG. 4 is a schematic illustration of one aspect of the method of the present invention;
FIG. 5 is a schematic illustration of another aspect of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
As shown in FIG. 1, the pumped storage power station site selection method of the invention comprises the following steps:
firstly, obtaining geographic elevation data, generating a water system in an area with certain water collecting capacity according to the geographic elevation data, and constructing a water system model;
secondly, taking a water system intersection as a drainage outlet, dividing a plurality of sub-drainage basins, and taking the plurality of sub-drainage basins as a total site selection area;
thirdly, selecting a sub-drainage basin, taking a drainage outlet as a starting point in a selected site selection area, taking k as a moving step length from downstream to upstream, and vertically water system, moving a dam axis along a water system, wherein each time the dam axis moves by k step length, water crossing is carried out at a point C, and the boundary of the site selection area is crossed at two points;
fourth, determining the dam length, dam height, normal water level elevation and corresponding area of the reservoir, comprising the following steps:
(1) Comparing the elevation values of the two points of the boundary of the cross-site selection area obtained in the third step, and taking the low-value point as one endpoint B of the dam axis 1 Searching the value points with the same height in the address selecting area by taking the low value point as a starting point;
(2) When with B 1 The points with the same elevation can be connected into a contour line intersecting with the dam axis in the site selection area and enclose a closed area, and the point of intersection of the contour line and the dam axis is taken as the end point to serve as the other end point B of the dam axis 2 ；
(3) When with B 1 The points of the same elevation can be connected in the addressing area to form a contour intersecting the dam axis but not enclosing a closed area, or when connected with B 1 Points of the same elevation cannot be connected to form a contour intersecting the dam axis in the addressing area, and B is lowered along the dam axis with k as a step length 1 Repeating (2) until the condition is satisfied;
(4) The normal water level elevation is designed to be equal to B 1 The same, denoted as H; the enclosed area surrounded by the contour line of the normal water storage level elevation and the dam axis is the normal water storage level area, and is marked as F; b (B) 1 And B is connected with 2 The distance of (2) is the dam length and is marked as L; the elevation of the point C is the height of the dam bottom Gao Chengji is H Bottom The dam height is defined as the difference between the normal water level and the elevation of the dam bottom, denoted as z=h-H Bottom ；
Fifthly, determining a reservoir parameter H, F, L, Z at the position when the point C moves by k step lengths, and calculating reservoir volume V according to the geographic elevation data;
sixth, when the point C moves by one k step, under the condition of considering the factors of the dam length L and the dam height Z, comparing the storage capacity at the moment with the storage capacity at the last position, and when the storage capacity is larger than the last position, considering that the position of the axis of the dam at the moment is better, otherwise, considering that the last moment is better, and specifically restricting as follows:
wherein V is i 、V i+1 The storage capacity is the storage capacity of each time the dam axis moves by k step sizes;
according to the mode, the local optimal position of the dam axis can be determined, and when the local optimal position is obtained, reservoir index parameters of the position are stored; taking the reservoir capacity condition as a determining factor, taking the dam axis position with the maximum reservoir capacity as a global optimal position in the site selection area, and drawing up a reservoir address;
seventh, taking the position of the next sub-drainage basin as a new starting point, repeating the third step to the sixth step to continue traversing until each sub-drainage basin is subjected to reservoir address establishment, wherein one sub-drainage basin corresponds to one reservoir address;
eighth, in the planned reservoir address, positioning an upper reservoir and a lower reservoir, and the rest reservoir addresses are invalid reservoir addresses; taking the lower reservoir as the center, connecting the C point of the determined optimal position of the upper reservoir and the lower reservoir in a certain range as the horizontal distance S of the upper reservoir and the lower reservoir, and taking the difference value of the normal water storage level elevation of the upper reservoir and the lower reservoir as the average water head of a power station
And (3) taking the pitch-height ratio as a screening condition, and matching the upper and lower libraries of the power station to finish site selection.
In the first step, the geographical elevation data are DEM data or contour line data, the DEM data are downloaded through a website, and the contour line data are actually measured or simulated contour line data.
In the first step, generating a water system in an area with certain water collecting capacity by utilizing ArcGIS according to geographic elevation data, and constructing a water system model; in the second step, a plurality of sub-basins are divided by arcGIS.
Fifthly, when the input data is DEM data, converting the DEM data into TIN data by utilizing a grid-to-TIN function of an ArcGIS; when the input data is contour data, extracting the elevation data into a shape format by using an ArcGIS, and creating TIN data according to the extracted elevation data; when the point C moves by k step sizes, determining a reservoir parameter-H, F, L, Z at the position, and calculating a reservoir volume V by using the surface volume function of the ArcGIS, wherein the expression is as follows:
V＝f(TIN,Polygon_F,H,BELOW)
wherein TIN is TIN data; polygon_F is a planar element corresponding to a normal water storage level; h is the elevation value of the normal water storage level; BELOW is a calculation parameter; v is the volume between the selected planar element and the TIN data below it, i.e. the reservoir volume.
The third step of the k value is based on the accuracy of the geographic elevation data, and the specific constraint is shown in table 1:
table 1 k value table
| k value (m) | DEM spatial resolution | Contour scale |
| 10 | Precision lower than or equal to 10m x 10m | ≤1:10000 |
| 5 | Precision lower than or equal to 5m×5m | ≤1:5000 |
| 2 | The precision is higher than 5m multiplied by 5m | ＞1:5000 |
In the sixth step, Z is based on actual engineering experience Limiting the limit ＝150m，L Limiting the limit ＝2000m。
In the eighth step, in the planned reservoir address, the reservoir capacity is between 500 ten thousand m 3 And 1000 ten thousand m 3 The reservoir address between the two is positioned to be filled in the reservoir, and the reservoir capacity is more than 1000 ten thousand m 3 The rest reservoir addresses are invalid reservoir addresses; taking the lower reservoir as the center, connecting the C point of the determined optimal position of the upper reservoir and the lower reservoir within the range of not more than 5km as the horizontal distance S of the upper reservoir and the lower reservoir, and taking the difference value of the normal water storage level elevation of the upper reservoir and the lower reservoir as the average water head of a power station
In a ratio of distance to height->
And (5) taking the power station with the power not more than 10 as a screening condition, and matching the upper and lower libraries of the power station to finish site selection.
And the data processing terminal is used for realizing the pumped storage power station address selection method.
A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform a pumped storage power plant site selection method as described above.
In the seventh step, according to practical engineering experience, Z Limiting the limit ＝150m，L Limiting the limit ＝2000m。
The higher the accuracy of the geographic elevation data is, the closer the site selection result is to the actual situation;
in practice, the upper reservoir is located in a depression with relatively closed terrain, and the lower reservoir is located in a river channel and a gully. The upper reservoir and the lower reservoir are required to have certain water collecting capacity, and the lower reservoir is required to be larger. Based on the characteristics, the ArcGIS generates a water system according to the geographic elevation data in the area with certain water converging capacity, a water system model is built, and the dam site is located on the water system model, so that more accurate site selection is performed;
according to engineering experience, the area is greater than 0.5km 2 As a possible pooling site area;
based on the DEM data, the 'grid-to-TIN' function of the ArcGIS is utilized to convert the DEM data into TIN data. TIN (Triangle Irregular Network) is an irregular triangular mesh model which reduces the data redundancy brought by the regular mesh method and is superior to the purely contour-based method in terms of gradient calculation efficiency.
Ratio of pitch to height
The method is used for primarily evaluating the economical efficiency of the power station, the longer the distance-to-height ratio is, the longer the water delivery system is, the larger the head loss is, the greater the engineering arrangement difficulty is, and the worse the economical efficiency is.
Examples of the calculation of the method of the invention are illustrated below:
firstly, obtaining DEM data of an address selection area, and downloading 30 m-resolution digital elevation data of ASTERGDEM from a geospatial data cloud platform, as shown in FIG. 2; generating a water system model by using a space analysis tool of the ArcGIS through the steps of filling, flow direction analysis, flow accumulation, water system extraction and the like, as shown in figure 3;
secondly, dividing sub-watershed by using a watershed tool of ArcGIS and taking a water system junction as a drainage outlet, and screening the area of the water system junction to be more than 0.5km 2 Is used as a total site selection area;
thirdly, selecting a sub-drainage basin, taking a drainage outlet as a starting point in a selected site selection area, taking k as a moving step length (k=10m in the moment) from downstream to upstream, moving a vertical water system along a water system, and carrying out water crossing at a point C every time the water system moves by k step length along the water system, wherein the boundary of the site selection area is at two points;
fourth, determining the dam length, dam height, normal water level elevation and corresponding area of the reservoir, comprising the following steps:
(1) Comparing the elevation values of the two points, taking the low value point as one end point B of the dam axis 1 The other end point is B 2 And searching for the same elevation value points in the area by taking the low value points as starting points. When with B 1 The points with the same elevation can be connected into a contour line intersecting with the dam axis in the range of the reservoir area and enclose a closed area, and then the point of intersection of the contour line and the dam axis is taken as the end point to serve as the other dam axisEndpoint B 2 . Illustrated in a contour form, as shown in fig. 4;
(2) When the sum is B 1 The points with the same elevation can be connected into a contour line intersecting with the dam axis in the range of the reservoir area, and when the points cannot be enclosed into a closed area, B is lowered along the dam axis by taking 10m as a step length according to practical experience 1 Repeating (1) until the condition is satisfied. Illustrated in a contour form, as shown in fig. 5;
so far, normal water level elevation and B 1 And B 2 Similarly, denoted as H, taking the fifth step (1) as an example, h=960 m; the enclosed area surrounded by the contour line where the normal water storage level elevation is and the dam axis is the normal water storage level area, which is marked as F, F=37ten thousand m 2 The corresponding planar element is denoted as polygon_f; b (B) 1 And B is connected with 2 The distance of (2) is the dam length, and is marked as L, wherein L=465 m; the elevation of the point C is the height of the dam bottom Gao Chengji is H Bottom ，H Bottom The dam height is defined as the difference between the normal water level and the elevation of the dam bottom, denoted as z=h-H =868 m Bottom ＝960-868＝92m；
Fifthly, adopting DEM data, and converting the DEM data into TIN data by utilizing the grid-to-TIN function of the ArcGIS; at each movement of point C by k steps, the reservoir parameters at that location are determined H, F, L, Z and the reservoir volume V is calculated using the ArcGIS "surface volume" function. The calculation principle is as follows: the TIN data is examined with each triangle to determine its area and volume, and the sum of these parts is output. The expression is as follows:
V＝f(TIN,Polygon_F,H,BELOW)
wherein TIN is TIN data; polygon_F is a planar element corresponding to a normal water storage level; h is the elevation value of the normal water storage level; BELOW is a calculated parameter indicating that the calculated volume is the volume between the lower part of the selected planar element and the TIN data, i.e. the reservoir volume. V calculation result is 1050 ten thousand m 3 ；
Sixth, when the point C moves by one k step, under the condition of considering factors such as dam length and dam height, comparing the storage capacity at the moment with the storage capacity at the last position, and when the storage capacity is larger than the last position, considering that the position of the axis of the dam at the moment is better, otherwise, considering that the last moment is better, and specifically restricting as follows:
wherein V is i 、V i+1 The storage capacity is the storage capacity of each time the dam axis moves by k step sizes; according to practical engineering experience, the dam height is not higher than 150m, namely Z Limiting the limit =150m; the dam length is not higher than 2000m, namely L Limiting the limit ＝2000m；
According to the mode, the local optimal position of the dam axis can be determined, and when the local optimal position is obtained, reservoir index parameters of the position are stored; taking the reservoir capacity condition as a determining factor, taking the dam axis position with the maximum reservoir capacity as a global optimal position in the site selection area, and drawing up a reservoir address;
and seventhly, taking the position of the next sub-drainage basin as a new starting point, repeating the third step to the eighth step, and continuing to traverse until each sub-drainage basin is subjected to reservoir address establishment, wherein one sub-drainage basin corresponds to one reservoir address.
Eighth, in the planned reservoir address, according to engineering experience, the reservoir capacity is between 500 ten thousand meters 3 And 1000 ten thousand m 3 The reservoir address between the two is positioned to be filled in the reservoir, and the reservoir capacity is more than 1000 ten thousand m 3 The rest of the reservoir addresses are invalid reservoir addresses. And connecting C points of the upper and lower reservoirs within 4km of the lower reservoir as a horizontal distance S of the upper and lower reservoirs, and taking the difference of normal water storage level heights of the upper and lower reservoirs as an average water head of a power station
In a ratio of distance to height->
(the larger the distance-to-height ratio is used for primarily evaluating the economy of the power station, the longer the distance-to-height ratio is, the larger the water delivery system is, the larger the head loss is, the more difficult the engineering arrangement is, and the worse the economy is), which is not more than 10, is used as a screening condition, and the matching of the upper warehouse and the lower warehouse of the power station is performed to finish the site selection work.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When used in whole or in part, is implemented in the form of a computer program product comprising one or more computer instructions. When loaded or executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may 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 instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (9)
1. The pumped storage power station site selection method is characterized by comprising the following steps of:
firstly, obtaining geographic elevation data, generating a water system in an area with certain water collecting capacity according to the geographic elevation data, and constructing a water system model;
secondly, taking a water system intersection as a drainage outlet, dividing a plurality of sub-drainage basins, and taking the plurality of sub-drainage basins as a total site selection area;
thirdly, selecting a sub-drainage basin, taking a drainage outlet as a starting point in a selected site selection area, taking k as a moving step length from downstream to upstream, and vertically water system, moving a dam axis along a water system, wherein each time the dam axis moves by k step length, water crossing is carried out at a point C, and the boundary of the site selection area is crossed at two points;
fourth, determining the dam length, dam height, normal water level elevation and corresponding area of the reservoir, comprising the following steps:
(1) Comparing the elevation values of the two points of the boundary of the cross-site selection area obtained in the third step, and taking the low-value point as one endpoint B of the dam axis 1 Searching the value points with the same height in the address selecting area by taking the low value point as a starting point;
(2) When with B 1 The points with the same elevation can be connected into a contour line intersecting with the dam axis in the site selection area and enclose a closed area, and the point of intersection of the contour line and the dam axis is taken as the end point to serve as the other end point B of the dam axis 2 ；
(3) When with B 1 The points of the same elevation can be connected in the addressing area to form a contour intersecting the dam axis but not enclosing a closed area, or when connected with B 1 Points of the same elevation cannot be connected to form a contour intersecting the dam axis in the addressing area, and B is lowered along the dam axis with k as a step length 1 Repeating (2) until the condition is satisfied;
(4) The normal water level elevation is designed to be equal to B 1 The same, denoted as H; the enclosed area surrounded by the contour line of the normal water storage level elevation and the dam axis is the normal water storage level area, and is marked as F; b (B) 1 And B is connected with 2 The distance of (2) is the dam length and is marked as L; the elevation of the point C is the height of the dam bottom Gao Chengji is H Bottom The dam height is defined as the difference between the normal water level and the elevation of the dam bottom, denoted as z=h-H Bottom ；
Fifthly, determining a reservoir parameter H, F, L, Z at the position when the point C moves by k step lengths, and calculating reservoir volume V according to the geographic elevation data;
sixth, when the point C moves by one k step, under the condition of considering the factors of the dam length L and the dam height Z, comparing the storage capacity at the moment with the storage capacity at the last position, and when the storage capacity is larger than the last position, considering that the position of the axis of the dam at the moment is better, otherwise, considering that the last moment is better, and specifically restricting as follows:
wherein V is i 、V i+1 The storage capacity is the storage capacity of each time the dam axis moves by k step sizes;
according to the mode, the local optimal position of the dam axis can be determined, and when the local optimal position is obtained, reservoir index parameters of the position are stored; taking the reservoir capacity condition as a determining factor, taking the dam axis position with the maximum reservoir capacity as a global optimal position in the site selection area, and drawing up a reservoir address;
seventh, taking the position of the next sub-drainage basin as a new starting point, repeating the third step to the sixth step to continue traversing until each sub-drainage basin is subjected to reservoir address establishment, wherein one sub-drainage basin corresponds to one reservoir address;
eighth, in the planned reservoir address, positioning an upper reservoir and a lower reservoir, and the rest reservoir addresses are invalid reservoir addresses; taking the lower reservoir as the center, connecting the C point of the determined optimal position of the upper reservoir and the lower reservoir in a certain range as the horizontal distance S of the upper reservoir and the lower reservoir, and taking the difference value of the normal water storage level elevation of the upper reservoir and the lower reservoir as the average water head of a power station
And (3) taking the pitch-height ratio as a screening condition, and matching the upper and lower libraries of the power station to finish site selection.
2. The pumped storage power station location method of claim 1, wherein the geographical 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.
3. The pumped storage power station location method according to claim 2, wherein in the first step, a water system is generated in a region with a certain water collecting capacity according to geographic elevation data by utilizing an ArcGIS, and a water system model is constructed; in the second step, a plurality of sub-basins are divided by arcGIS.
4. The pumped storage power station address selection method according to claim 3, wherein the fifth step comprises converting DEM data into TIN data by utilizing a grid-to-TIN function of ArcGIS when the input data is DEM data; when the input data is contour data, extracting the elevation data into a shape format by using an ArcGIS, and creating TIN data according to the extracted elevation data; when the point C moves by k step sizes, determining a reservoir parameter-H, F, L, Z at the position, and calculating a reservoir volume V by using the surface volume function of the ArcGIS, wherein the expression is as follows:
V＝f(TIN,Polygon_F,H,BELOW)
wherein TIN is TIN data; polygon_F is a planar element corresponding to a normal water storage level; h is the elevation value of the normal water storage level; BELOW is a calculation parameter; v is the volume between the selected planar element and the TIN data below it, i.e. the reservoir volume.
5. The pumped storage power station location method according to claim 2, wherein the value of the k value in the third step is based on the accuracy of the geographic elevation data, and the specific constraint is as follows:
(1) If the DEM spatial resolution precision is lower than or equal to 10m multiplied by 10m, or the contour scale is less than or equal to 1:10000, the k value is 10m;
(2) If the spatial resolution precision of the DEM is lower than or equal to 5m multiplied by 5m, or the contour scale is less than or equal to 1:5000, the k value is 5m;
(3) If the DEM spatial resolution precision is higher than 5m multiplied by 5m or the contour scale is more than 1:5000, the k value takes 2m.
6. The pumped storage power station addressing method as set forth in claim 1, wherein in the sixth step, Z is based on actual engineering experience Limiting the limit ＝150m，L Limiting the limit ＝2000m。
7. The pumped-storage power station addressing method as set forth in claim 1, wherein in the eighth step, in the formulated reservoir address, the reservoir capacity is between 500 ten thousand m 3 And 1000 ten thousand m 3 The reservoir address between the two is positioned to be filled in the reservoir, and the reservoir capacity is more than 1000 ten thousand m 3 The rest reservoir addresses are invalid reservoir addresses; taking the lower reservoir as the center, connecting the C point of the determined optimal position of the upper reservoir and the lower reservoir within the range of not more than 5km as the horizontal distance S of the upper reservoir and the lower reservoir, and taking the difference value of the normal water storage level elevation of the upper reservoir and the lower reservoir as the average water head of a power station
In a ratio of distance to height->
And (5) taking the power station with the power not more than 10 as a screening condition, and matching the upper and lower libraries of the power station to finish site selection.
8. A data processing terminal for implementing the pumped storage power station site selection method of any one of claims 1 to 7.
9. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the pumped storage power plant site selection method of any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116822252A (en) * | 2023-08-28 | 2023-09-29 | 中国电建集团昆明勘测设计研究院有限公司 | Quick determination method for water energy parameters of pumped storage power station |
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| CN116822252A (en) * | 2023-08-28 | 2023-09-29 | 中国电建集团昆明勘测设计研究院有限公司 | Quick determination method for water energy parameters of pumped storage power station |
| CN116822252B (en) * | 2023-08-28 | 2023-11-10 | 中国电建集团昆明勘测设计研究院有限公司 | Quick determination method for water energy parameters of pumped storage power station |
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