Pumped storage power station site selection method based on improved analytic hierarchy process and related equipment

Abstract

The invention provides a pumped storage power station site selection method based on an improved analytic hierarchy process and related equipment. The method comprises the following steps: constructing a hierarchical structure model of pumped storage power station site selection; refining the criterion layer, comparing the relative importance of each factor of the criterion layer in pairs by adopting a scaling method of 1-6 and reciprocals thereof, and constructing an initial judgment matrix; constructing an entropy weight matrix by using an entropy weight method according to each factor; correcting the initial judgment matrix according to the entropy weight matrix to obtain a corrected judgment matrix; determining a weight value of each factor according to the correction judgment matrix and performing consistency verification; determining a scoring rule of each factor, calculating a score of each factor, and calculating a comprehensive score according to the score of each factor and the weight value; and determining an optimal power station site selection scheme according to the comprehensive score. The pumped storage power station site selection method based on the improved analytic hierarchy process and the related equipment provided by the invention are simple and convenient, and can effectively determine the optimal power station site selection scheme.

Description

Technical Field

[0001] The present application relates to the technical field of pumped storage power stations, and in particular to a method for selecting a site for a pumped storage power station based on an improved analytic hierarchy process and related equipment. Background Art

[0002] Pumped storage is the use of electricity during the low load period to pump water to the upper reservoir, and then release the water stored in the upper reservoir to the lower reservoir for power generation during the peak load period, also known as energy storage power generation. It can convert the excess electricity during the low load period of the power grid into high-value electricity during the high load period of the power grid. It is suitable for frequency and phase modulation, can be used to stabilize the frequency and voltage of the power system, and is suitable for emergency standby. It can also improve the efficiency of thermal power plants and nuclear power plants in the power system. Pumped storage power stations are an important renewable energy power storage system. The selection of their sites is affected by many factors such as topography, geology, and environment, which have an important impact on the efficiency and economy of the system.

[0003] Some technologies provide a method for site selection assessment and analysis of pumped storage power stations, which mainly focuses on terrain structural parameters and does not adequately assess environmental impacts and construction conditions. There is a lack of empirical research, and the effectiveness and reliability of the method have not been verified. The model in the method treats each indicator as an independent variable for analysis, without considering the interaction and mutual influence between the indicators.

[0004] Some other technologies provide a method for selecting a pumped storage power station site based on the improved G1 method, which requires a lot of data collection, analysis and calculation, requires professional software and personnel, and has a high implementation cost. It also ignores other potentially important factors, such as environmental factors, topography, and geological conditions.

[0005] The current site selection method for pumped-storage power stations is still imperfect. Therefore, a simple, efficient and accurate site selection method for pumped-storage power stations is urgently needed. Summary of the invention

[0006] In view of this, the purpose of this application is to propose a pumped storage power station site selection method based on an improved hierarchical analysis method and related equipment to solve the above technical problems.

[0007] In a first aspect of the present application, a method for site selection of a pumped-storage power station based on an improved analytic hierarchy process is provided, comprising: constructing a hierarchical model for site selection of a pumped-storage power station, the hierarchical model comprising a target layer, a criterion layer and a scheme layer, the target layer being the optimal site selection scheme for the power station, the criterion layer comprising hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, and the scheme layer comprising multiple power station address schemes; refining the criterion layer, using a scaling method of 1 to 6 and its reciprocal to compare the relative importance of each factor in the criterion layer in pairs, and constructing an initial judgment matrix; constructing an entropy weight matrix according to each factor using an entropy weight method; correcting the initial judgment matrix according to the entropy weight matrix to obtain a corrected judgment matrix; determining the weight value of each factor according to the corrected judgment matrix and performing a consistency check; determining a scoring rule for each factor, and calculating the score of each factor, and calculating a comprehensive score according to the score of each factor and the weight value; and determining the optimal site selection scheme for the power station according to the comprehensive score.

[0008] Furthermore, the refinement of the criterion layer includes: the hydrogeological factors include geomorphic conditions, geological conditions, climatic conditions, water source conditions and regional geological structure stability; the construction factors include traffic conditions, power supply conditions, water supply conditions and building material conditions; the land acquisition factors include the occupied land area and the number of people to be relocated and resettled; the regional power grid factors include the distance to the load center and substation; the hub layout factors include the distance to height ratio, head section height and unit selection.

[0009] Furthermore, the scaling method of 1 to 6 and their reciprocals is defined as follows:

[0010]

[0011] The initial judgment matrix α ij It indicates the relative importance of the i-th factor relative to the j-th factor.

[0012] Furthermore, the entropy weight matrix is ​​constructed based on each factor using the entropy weight method, including: calculating the standardized value of each factor relative to other factors The information entropy of each factor is calculated according to the standardized value E(i)=-∑(p ij ×log2(p ij )), where p ij is the standardized value of the ith factor relative to the jth factor, The entropy weight is calculated according to the standardized value, and an entropy weight matrix ω=[ω1 ω2 ω3 ω4 ω5] is constructed, where ω i =1-E(i) / ∑(1-E(i)).

[0013] Furthermore, the modified judgment matrix Among them, a i ' j =a ij ×ω i .

[0014] Further, the determining the weight value of each factor according to the modified judgment matrix and performing consistency check includes: calculating the initial weight vector W′=[w′1w′2w′3w′4w′5] of each factor according to the modified judgment matrix, wherein, The initial weight vector is normalized to obtain the final weight vector W = [w1 w2 w3 w4w5], where Perform consistency check on the final weight vector and calculate the maximum eigenvalue λ max , and calculate the consistency ratio in, RI is the random consistency index; when CR < 0.1, the consistency check is passed; otherwise, the judgment matrix should be adjusted and corrected.

[0015] Furthermore, the comprehensive score Z C1 =[C 11 C 12 C 13 C 14 C 15 ]*W, where C 1i Assign a score to each factor.

[0016] Further, determining the optimal site selection scheme for a power station according to the comprehensive score includes: determining the power station address scheme with the largest comprehensive score as the optimal site selection scheme for a power station.

[0017] The second aspect of the present application provides a pumped storage power station site selection device based on an improved hierarchical analysis method, including: a construction module, configured to construct a hierarchical model for the site selection of a pumped storage power station, the hierarchical model including a target layer, a criterion layer and a scheme layer, the target layer is the optimal site selection scheme for the power station, the criterion layer includes hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, and the scheme layer includes multiple power station address schemes; a matrix module, configured to refine the criterion layer, and use a scaling method of 1 to 6 and its reciprocal to scale the factors of the criterion layer. The relative importance of each factor is compared pairwise to construct an initial judgment matrix; an entropy weight module is configured to construct an entropy weight matrix according to each factor using the entropy weight method; a correction module is configured to correct the initial judgment matrix according to the entropy weight matrix to obtain a corrected judgment matrix; a verification module is configured to determine the weight value of each factor according to the corrected judgment matrix and perform consistency verification; a scoring module is configured to determine the scoring rule of each factor, and calculate the score of each factor, and calculate the comprehensive score according to the score of each factor and the weight value; a result module is configured to determine the optimal site selection plan for the power station according to the comprehensive score.

[0018] In a third aspect of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for site selection of a pumped-storage power station based on the improved analytic hierarchy process as described in the first aspect above is implemented.

[0019] The fourth aspect of the present application provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable the computer to execute the pumped-storage power station site selection method based on the improved hierarchical analysis method as described in the first aspect above.

[0020] The fifth aspect of the present application provides a computer program product, including computer program instructions, characterized in that when the computer program instructions are executed on a computer, the computer executes the pumped-storage power station site selection method based on the improved hierarchical analysis method as described in the first aspect above.

[0021] From the above, it can be seen that the present application provides a method for site selection of a pumped-storage power station based on an improved hierarchical analysis method and related equipment, the method comprising: constructing a hierarchical structure model for site selection of a pumped-storage power station, the hierarchical structure model comprising a target layer, a criterion layer and a scheme layer, the target layer being the optimal site selection scheme for the power station, the criterion layer comprising hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, the scheme layer comprising multiple power station address schemes; refining the criterion layer, using a scaling method of 1 to 6 and its reciprocal to compare the relative importance of each factor in the criterion layer in pairs, and constructing an initial judgment matrix; constructing an entropy weight matrix according to each factor using the entropy weight method; correcting the initial judgment matrix according to the entropy weight matrix to obtain a corrected judgment matrix; determining the weight value of each factor according to the corrected judgment matrix and performing a comparison. Consistency check; determine the scoring rules for each factor, calculate the score of each factor, and calculate the comprehensive score based on the score of each factor and the weight value; determine the optimal site selection plan for the power station based on the comprehensive score; this method can determine the optimal site selection plan for the power station using only five factors; the improved hierarchical analysis method performs quantitative analysis on the basis of qualitative analysis, constructs the initial judgment matrix through pairwise comparison, and then standardizes the matrix, introduces the calculation of information entropy, and performs consistency check to make the evaluation result more objective; compared with purely qualitative or purely quantitative methods, the improved hierarchical analysis method combines the advantages of both, reduces the influence of subjective judgment on weight distribution through the calculation of information entropy, and avoids the difficulty of data acquisition and processing caused by pure quantification. Compared with traditional methods, it is more flexible and can be evaluated according to the specific conditions of different sites. The site selection method and related equipment of the pumped storage power station based on the improved hierarchical analysis method are simple and convenient, and can effectively determine the optimal site selection plan for the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of a process flow of a method for site selection of a pumped storage power station based on an improved analytic hierarchy process in an embodiment of the present application;

[0024] Figure 2 This is a structural schematic diagram of a pumped storage power station site selection device based on an improved analytic hierarchy process in an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0028] Pumped storage is the use of electricity during the low load period to pump water to the upper reservoir, and then release the water stored in the upper reservoir to the lower reservoir for power generation during the peak load period, also known as energy storage power generation. It can convert the excess electricity during the low load period of the power grid into high-value electricity during the high load period of the power grid. It is suitable for frequency and phase modulation, can be used to stabilize the frequency and voltage of the power system, and is suitable for emergency standby. It can also improve the efficiency of thermal power plants and nuclear power plants in the power system. Pumped storage power stations are an important renewable energy power storage system. The selection of their sites is affected by many factors such as topography, geology, and environment, which have an important impact on the efficiency and economy of the system.

[0029] Some technologies provide a method for site selection assessment and analysis of pumped storage power stations, which mainly focuses on terrain structural parameters and does not adequately assess environmental impacts and construction conditions. There is a lack of empirical research, and the effectiveness and reliability of the method have not been verified. The model in the method treats each indicator as an independent variable for analysis, without considering the interaction and mutual influence between the indicators.

[0030] Some other technologies provide a method for selecting a pumped storage power station site based on the improved G1 method, which requires a lot of data collection, analysis and calculation, requires professional software and personnel, and has a high implementation cost. It also ignores other potentially important factors, such as environmental factors, topography, and geological conditions.

[0031] The current site selection method for pumped-storage power stations is still imperfect. Therefore, a simple, efficient and accurate site selection method for pumped-storage power stations is urgently needed.

[0032] Below, through specific embodiments and combined Figures 1 to 3 To describe the technical solution of this application in detail.

[0033] In some embodiments of the present application, a method for selecting a pumped storage power station site based on an improved analytic hierarchy process is provided, such as Figure 1As shown, the following steps are included:

[0034] S1. Construct a hierarchical model for the site selection of a pumped-storage power station, wherein the hierarchical model includes a target layer, a criterion layer and a scheme layer. The target layer is the optimal site selection scheme for the power station, the criterion layer includes hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, and the scheme layer includes multiple power station address schemes.

[0035] Establish a hierarchical model, organize the problem-solving ideas in an orderly manner, and establish a model consisting of a target layer, a criterion layer, and a solution layer. The target layer corresponds to the predetermined target, which is called the highest layer; the criterion layer corresponds to the criteria and sub-criteria required to achieve the target, which is the middle link, also called the middle layer; the solution layer corresponds to the available measures and decision-making plans to achieve the decision-making target, also called the lowest layer.

[0036] The optimal site selection plan for the power plant is taken as the target layer, and various criteria or standards that affect the decision, such as the main factors of technical conditions, are taken as the criterion layer. The technical conditions are further divided into five sub-criteria. The solution layer lists all the power plant site plans to be evaluated.

[0037] S2. Refine the criterion layer, use a scaling method of 1 to 6 and its reciprocal to compare the relative importance of each factor in the criterion layer in pairs, and construct an initial judgment matrix.

[0038] The refinement of the criterion layer includes: hydrogeological factors including geomorphic conditions, geological conditions, climatic conditions, water source conditions and regional geological structure stability, which can be obtained through hydrogeological data; construction factors include traffic conditions, power supply conditions, water supply conditions and building materials conditions, which can be obtained through data on the power station location; land acquisition factors include the occupied land area and the number of relocated and resettled people, which can be obtained through data on the power station location; regional power grid factors include the distance to the load center and substation, which can be obtained through data on the power station location; hub layout factors include distance-to-height ratio, head section height and unit selection, which can be obtained through power station design data.

[0039] The scaling method of 1 to 6 and its reciprocal is defined as follows:

[0040]

[0041] In order to avoid the bias of the middle value, an even number of scale points is used to ensure that each point has a clear definition and that decision makers can understand the difference between these points. Compared with the traditional 1-9 scale, "2, 4, 6, 8" represents the middle value of adjacent judgments, which has a clearer definition, because each data in this scale has a clear meaning, which is more conducive to application. In addition to being able to express the importance of two elements, it is also transitive and can also show the relative importance of an element to any other element. In some technologies, the 1-3 scale can only represent the importance between two elements. For example, if one element is more important than two elements, the indicator is 2. If one element is more important than three elements, the indicator is also 2. If you only look at the data, you will not be able to compare the importance of two elements and three elements.

[0042] Initial judgment matrix α ij It indicates the relative importance of the i-th factor relative to the j-th factor.

[0043] S3. Construct an entropy weight matrix based on each factor using the entropy weight method.

[0044] In order to make the weight more objective, the AHP is improved by adopting an objective weighting method to determine the weight of the indicator by calculating the information entropy of the indicator. In the improved AHP, the entropy weight method can be used to correct the consistency of the human judgment matrix, thereby improving the accuracy and objectivity of the evaluation.

[0045] The entropy weight matrix is ​​constructed by using the entropy weight method according to various factors, including:

[0046] S301. Calculate the standardized value of each factor relative to other factors

[0047] Normalized value matrix Note that in order to avoid a ij -min(a ij )=0, there is no solution. Let c ij =0.001, so that when the entropy of each factor is calculated later, the logarithmic function is guaranteed to be within the definition domain, thereby smoothly calculating the information entropy.

[0048] S302, calculating the information entropy of each factor according to the standardized value E(i)=-∑(p ij ×log2(p ij )), where p ij is the standardized value of the ith factor relative to the jth factor,

[0049] S303: Calculate entropy weights according to the standardized values ​​and construct an entropy weight matrix.

[0050] Entropy weight matrix ω = [ω1 ω2 ω3 ω4 ω5], where, ω i =1-E(i) / ∑(1-E(i)).

[0051] S4. Modify the initial judgment matrix according to the entropy weight matrix to obtain a modified judgment matrix.

[0052] Modified judgment matrix Among them, a′ ij =a ij ×ω i .

[0053] S5. Determine the weight value of each factor according to the modified judgment matrix and perform consistency check.

[0054] Determining the weight value of each factor according to the modified judgment matrix and performing consistency check includes:

[0055] S501, calculate the initial weight vector W′=[w′1w′2w′3w′4w′5] of each factor according to the modified judgment matrix, where:

[0056] S502, normalize the initial weight vector to obtain a final weight vector W = [w1 w2 w3 w4w5], where:

[0057] S503: Perform consistency check on the final weight vector and calculate the maximum eigenvalue λ max , and calculate the consistency ratio in, RI is the random consistency index; when CR < 0.1, the consistency check is passed; otherwise, the judgment matrix should be adjusted and corrected.

[0058] In order to verify the rationality of the weight allocation of each factor, the final weight vector is checked for consistency, and the maximum eigenvalue λ is calculated using the eigenvalue method. max , calculate the consistency ratio, where the RI values ​​are shown in Table 1.

[0059] Table 1 RI value table

[0060]

[0061] S6. Determine the scoring rules for each factor, calculate the score of each factor, and calculate the comprehensive score based on the score of each factor and the weight value.

[0062] The scoring rules for each factor are shown in Table 2.

[0063] Table 2 Scoring rules for each factor

[0064]

[0065]

[0066]

[0067] According to the scoring rules and the actual situation of each power station address, the score of each factor is calculated respectively, and the comprehensive score Z C1 =[C 11 C 12 C 13 C 14 C 15 ]*W, where C 1i Score each factor; C 11 =20%×(C 111 +C 112 +C 113 +C 114 +C 115 );C 12 =25%×(C 121 +C 122 +C 123 +C 124 );C 13 =50%×(C 131 +C 132 );C 15 =33.3%×(C 151 +C 152 +C 153 ).

[0068] S7. Determine the optimal site selection plan for the power station based on the comprehensive score.

[0069] The power station address plan with the largest comprehensive score is determined as the optimal power station site selection plan.

[0070] This method can accurately and comprehensively evaluate the resource situation of candidate sites for pumped-storage power stations in combination with technical conditions, ensure the selection of the most suitable site, and improve the efficiency and economy of the power station. It can help reduce the risks in the construction and operation of pumped-storage power stations and optimize resource utilization to the maximum extent. By comprehensively considering the five evaluation dimensions mainly involved in technical conditions, it provides a scientific and effective evaluation tool for the site selection of pumped-storage power stations.

[0071] Compared with other methods, the hierarchical analysis method can more clearly show the hierarchical structure and interrelationships between different technical conditions, which helps to discover key influencing factors. The improved hierarchical analysis method performs quantitative analysis on the basis of qualitative analysis, constructs the initial judgment matrix through pairwise comparison, standardizes the matrix, introduces the calculation of information entropy, and performs consistency test to make the evaluation results more objective. The hierarchical analysis method takes into account the subjective opinions of experts and can reflect the preferences of decision makers. The entropy weight method assigns weights based on the degree of variation of the data itself, reducing the influence of subjective factors. Combining the two methods to evaluate site resources can make the evaluation results more comprehensive and accurate.

[0072] Compared with purely qualitative or purely quantitative methods, the improved analytic hierarchy process combines the advantages of both. It reduces the influence of subjective judgment on weight distribution through the calculation of information entropy, and avoids the difficulty of data acquisition and processing caused by pure quantification. The improved analytic hierarchy process allows decision makers to adjust the weights of various factors according to actual conditions to adapt to different decision-making environments and needs. Compared with traditional methods, the improved analytic hierarchy process is more flexible and can conduct personalized evaluations based on the specific conditions of different sites. The process of the improved analytic hierarchy process is transparent, and all judgments and calculations are well documented, which helps to improve the credibility of decision-making. Compared with some "black box" models, each step of the improved analytic hierarchy process is explainable, and its calculation process is relatively simple, which is easy to promote and apply.

[0073] Compared with the traditional single analytic hierarchy process and entropy weight method, the advantage of this application is that the entropy weight method is embedded in the original analytic hierarchy process, and each element in the initial judgment matrix is ​​standardized relative to other elements in the calculation, and the information entropy is calculated to correct the consistency of the judgment matrix. The weight of each indicator is calculated according to the entropy value, which reduces the influence of subjective judgment on the weight distribution. In some technologies, the two methods are combined only according to the results calculated by the analytic hierarchy process and the entropy weight method respectively, and the weights are calculated by 50% each, resulting in the final result still being very subjective, and different results may be obtained depending on the different weights selected, and the results are not unique.

[0074] Example 1

[0075] Taking the site selection of a pumped storage power station in China as an example, the optimal site selection scheme is selected from two power station address schemes, and the initial judgment matrix of the technical conditions is constructed as shown in Table 3.

[0076] Table 3 Initial judgment matrix

[0077] Criteria Layer Hydrogeological factors Construction factors Land acquisition factors Regional power grid factors Hub layout factors Hydrogeological factors 1 2 3 4 1 Construction factors 1 / 2 1 2 3 1 / 2 Land acquisition factors 1 / 3 1 / 2 1 2 1 / 3 Regional power grid factors 1 / 4 1 / 3 1 / 2 1 1 / 4 Hub layout factors 1 2 3 4 1

[0078] Calculate the standardized value of each factor relative to other factors to form a matrix of standardized values

[0079]

[0080] Replace the 0.00 value in the above standardized value matrix with 0.001, and calculate the information entropy E = [0.941.862.542.380.94] of each factor.

[0081] Calculate the entropy weight of the indicator and construct the entropy weight matrix ω = [1.26 1.51 1.69 1.65 1.26].

[0082] Get the modified judgment matrix

[0083] The modified judgment matrix A′ is used to calculate the initial weight vectors of each factor in the criterion layer, and the initial weight vector W′=[0.28180.21490.14320.07830.2818] is normalized to obtain the final weight vector W=[0.28180.21490.14320.07830.2818].

[0084] Calculate the maximum eigenvalue λ max =5.3376, n is the order of the matrix, which is 5, and RI is the random consistency index found in Table 1 according to the order of the matrix, which is 1.12.

[0085] The calculated consistency index CI value is 0.0844, and the consistency ratio CR value is 0.075. Since CR is less than 0.1, it can be considered that the consistency of the pairwise comparison matrix is ​​acceptable.

[0086] According to the scoring rules in Table 2, the scores C of each factor of the two power station address schemes are calculated. 11 , C 12 , C 13 , C 14 and C 15 .

[0087] Power station address plan 1 C 11 = 340 × 0.2 = 68 points, C 12 = 320 × 0.25 = 80 points, C 13 0×0.5=0 points, C 14 40 points, C 15 It is 100×0.333=33.3 points.

[0088] Among them, Scheme 1 is because the upper reservoir is located at the source, and the upper reservoir is a reservoir basin surrounded by mountains on the east, south and west. The watershed around the reservoir is wide and thick, and there are three passes. Except for the terrain at the dam site, which is lower than the normal water level of the reservoir and requires a dam to block the water, the terrain of other sections is higher than the normal water level of the reservoir. The reservoir has good natural closure conditions, large natural storage capacity, and has the conditions for a natural reservoir basin. Therefore, the landform condition C 111 The score is 60 points. In order to avoid the impact of blasting construction of powerhouses and auxiliary caverns on the operation of the built high-speed tunnel, the underground powerhouse adopts the middle powerhouse layout plan. The surrounding rock of the middle powerhouse layout plan is fresh granite gneiss, which is relatively hard and complete, and there is no large fault fracture zone passing through. The surrounding rock around the tunnel and the top arch and side wall of the powerhouse are mainly Class III. The engineering geological conditions are good, so the geological conditions C 112 The score is 60 points. The power station is located in a temperate continental monsoon climate with four distinct seasons, rainy and hot seasons, an average annual temperature of 2℃~6℃, an average winter temperature below -11℃, and an average annual precipitation of 400mm~600mm, of which 80% is concentrated in summer. The most abundant precipitation is in the east, so the climate condition is C. 113 The score is 60 points; according to the annual runoff analysis of the lower reservoir, the average runoff of the lower reservoir over the years is 2.47 billion m 3 The natural runoff of the lower reservoir fully meets the water requirements of the power station's initial water storage and normal operation period, and the average runoff of the upper reservoir is 404,000 m 3 , so the water source condition C 114 The score is 60 points; the peak acceleration value of the earthquake in this area is less than 0.05g, the characteristic period of the earthquake response spectrum is 0.35s, and the corresponding basic earthquake intensity is VI, so the regional geological structure stability C 115 The score is 100 points.

[0089] The project has extremely convenient external transportation. The railway and road transportation network near the project area is well developed. There are expressways and national roads passing nearby. The local roads can directly reach the project area, so the transportation conditions are C. 121 The score is 100 points. The power supply for the construction of the pumped storage power station is planned to be connected by the nearby substation at this stage. The length of the power supply line is temporarily considered to be 30 kilometers. In addition, there is a 10kV power supply line passing through the lower reservoir dam site near the project area, which can meet the power needs in the early stage of construction. Therefore, the power supply condition C 122 The score is 40 points; construction water is mainly for production water and domestic water. The construction water of the upper and lower reservoirs can be taken from the river where the lower reservoir is located. The production water can be used directly or after sedimentation treatment in a sedimentation tank. The domestic water must be purified before use. The water supply of the production and living areas of the upper and lower reservoirs must be pumped to the high-level water tank through the pump station and supplied to each construction site. The head of the three water supply systems is less than 300m, so the water supply condition C 123The score is 80 points; the natural building materials required for this project mainly include: rockfill materials for the upper reservoir dam body, cushion materials, transition materials, rockfill materials for the lower reservoir dam body, concrete aggregates, asphalt concrete aggregates, and earth and stone materials for cofferdam filling required for the project. The rockfill materials for the upper reservoir dam body are mainly sourced from the excavated materials from the upper reservoir basin and underground cavern excavated materials. The lithology of the basin excavated materials is marble and hornblende schist, and the lithology of the underground cavern excavated materials is mainly marble, hornblende schist and granite gneiss. The reserves and quality meet the needs of the project. The concrete aggregates required for the upper reservoir, lower reservoir dam and water transmission and power generation project are artificial aggregates. The original rock materials are excavated from underground caverns. The rock types are marble, hornblende schist and granite gneiss. The quantity and quality of the excavated materials meet the needs of the project. The asphalt concrete aggregates required for the project are artificial aggregates. The marble excavated from the underground caverns in the upper reservoir area is alkaline material. The quantity and quality of the excavated materials meet the needs of the project. The slag for cofferdam filling is excavated slag from the project. Therefore, the building material condition C 124 The score is 100 points.

[0090] Plan 1 permanently occupies 2063.52 mu of cultivated land and temporarily requisitions 273.44 mu of cultivated land, so the occupied cultivated land area is C 131 The score is 0 points; 593 people were relocated and resettled, and the number of people relocated and resettled was C 132 The score is 0 points.

[0091] The straight-line distance from the load center to the scheme 1 is about 245 km, so the distance between the load center and the substation is C. 141 The score is 40 points.

[0092] The distance-to-height ratio of scheme 1 is 13.4, so the distance-to-height ratio is C. 151 The score is 0 points; the head section height is 100m-200m, so the head section height is C 152 The score is 0 points; the unit type is 225MW, so the unit type is C 153 The score is 100 points.

[0093] Power station address plan 2 C 11 = 460 × 0.2 = 92 points, C 12 = 320 × 0.25 = 80 points, C 13 = 180 × 0.5 = 90 points, C 14 100 points, C 15 It is 245×0.333=81.585 points.

[0094] Among them, the second scheme is because the upper reservoir basin is generally NE-oriented, which is a canyon river type reservoir. The mountains around the reservoir are wide and thick, the slopes are complete, and the watershed elevation is above 1000m, which is much higher than the normal water storage level of the reservoir. There are no low passes around the reservoir, and the terrain is well closed. The upper reservoir is dammed on the upper reaches of the SY River, and the lower reservoir is dammed on the Shenkeng River, a first-level tributary on the right bank of the LC River. The natural reservoir basin is long and narrow, and it is a canyon river type reservoir. Therefore, the landform condition C 111 The score is 100 points; the surrounding rock types are mainly Class III to Class II, and some are Class IV to Class V. The cavern formation conditions are good. The surrounding rock of the cavern is generally stable, but the local stability is poor. During excavation, reinforcement measures such as anchor spraying should be taken in time. The fault fracture zone, joint dense zone and other cave sections should be strengthened. Therefore, the geological conditions are C 112 The score is 80 points. The power station is located in a subtropical monsoon climate with four distinct seasons, sufficient sunshine, warm and humid weather, abundant rainfall, an average annual temperature of 16.9℃, and an extreme minimum temperature of -10.0℃. The average annual rainfall of the upper and lower reservoirs of the pumped storage power station is 1524.6mm. The annual rainfall is unevenly distributed, mostly concentrated in March to September, accounting for 75.3% of the year. Therefore, the climate condition C 113 The score is 80 points; the average annual runoff of the upper reservoir is 4.134 million m 3 The average annual runoff of the Lower Reservoir is 5.112 million m 3 , so the water source condition C 114 The score is 100 points; the 50-year exceedance probability of the bedrock in the project site is 10%, the bedrock horizontal seismic peak acceleration is 42gal, and the basic seismic intensity of the site is VI, so the regional geological structure stability C 115 The score is 100 points.

[0095] Option 2: At present, the traffic conditions in the lower reservoir area of ​​the project are relatively good. You can reach the natural village of the lower reservoir by taking the provincial road and then the local road. From the natural village, you can go upstream along the simple gravel road at the bottom of the deep pit creek to the dam site of the lower reservoir, the water inlet / outlet of the lower reservoir, and the switch station at the tail of the lower reservoir. The distances are 0.8km, 1.8km, and 2.4km respectively. The road width is about 2.5m. However, the traffic conditions in the upper reservoir area are relatively poor, so traffic condition C is selected. 121 The score is 80 points. According to the power supply conditions in the project area, after investigation, there are 110kV substations and 35kV substations near the project area. The 110kV substation is about 10km away from the lower reservoir in the project area; the 35kV substation is about 5.0km away from the newly built 35kV construction center substation in the project area. Therefore, the power supply condition C 122 The score is 100 points; the upper reservoir basin area is 4.94km 2 , the average flow rate over many years is 0.131m 3 / s, with an average annual runoff of 4.134 million m 3It can be used as a source of production and domestic water during the construction period of the upper reservoir. The basin area of ​​the lower reservoir is 6.12km 2 , the average flow rate over many years is 0.162m 3 / s, annual runoff 5.112 million m 3 According to the preliminary calculation and analysis of hydrological data, the natural water volume of a branch ditch is small during the dry season, and the ditch water cannot meet the construction water demand. Therefore, it is necessary to build a water retaining weir at an appropriate position in the branch ditch to fully utilize the ditch water. The Lower Reservoir Creek is 3.0 km away from the dam site of the Lower Reservoir, and has abundant water. It can be used as a backup water source for production and domestic water during the construction period of the Lower Reservoir of this project. The domestic water in the upper and lower reservoir areas must be purified before use, so the water supply condition C 123 The score is 80 points; the construction materials required for the project include dam body rockfill, transition materials, cushion materials, concrete aggregates, etc. The reserves and quality of the excavated stones in the upper and lower reservoir areas and the underground engineering tunnel excavated materials meet the needs of the project construction. The available stone quarries include the stone quarry in the upper reservoir and the spare stone quarry in the lower reservoir. However, there is a lack of natural sand and gravel sources available for mining within the project area. The commercial sand processing plant near the project area was investigated, and the transportation distance is about 18km to 45km, so the construction material condition C 124 The score is 60 points.

[0096] The permanent land occupation of Option 2 involves 4.38 mu of cultivated land. The flooding area of ​​the power station reservoir does not involve cultivated land, so the occupied cultivated land area is C. 131 Score 80 points; This project does not involve the relocation of personnel, so the number of people to be relocated is C 132 The score is 100 points.

[0097] The straight-line distance from the load center of Scheme 2 is about 77 km, so the distance between the load center and the substation is C 141 The score is 100 points.

[0098] The distance-to-height ratio of the power station in Scheme 2 is 4.4, so the distance-to-height ratio C 151 The score is 95 points; the maximum head is 578.9m, the rated head is 535m, and the minimum head is 500.5m, so the head section height is C 152 The score is 80 points; the unit type is 350MW, so the unit type is C 153 The score is 70 points.

[0099] After scoring each factor of Option 1 and Option 2 respectively, the comprehensive score is calculated by multiplying it with the weight value.

[0100] Comprehensive score of plan 1 Comprehensive score of option 2 According to the calculation results, the power station resources of Option 2 are more advantageous, so Option 2 is more recommended.

[0101] The site resource score of the pumped storage power station calculated by this application based on the technical conditions reduces the required data and the reliance on subjective judgment results. Based on the improved hierarchical analysis method, the weight values ​​of different influencing factors can be adjusted according to the actual situation of the project, which has good applicability.

[0102] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0103] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0104] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0105] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0106] In some embodiments of the present application, a pumped storage power station site selection device based on an improved hierarchical analysis method is provided, referring to Figure 2, including: a construction module 21, configured to construct a hierarchical model for the site selection of a pumped storage power station, the hierarchical model includes a target layer, a criterion layer and a scheme layer, the target layer is the optimal site selection scheme for the power station, the criterion layer includes hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, and the scheme layer includes multiple power station address schemes; a matrix module 22, configured to refine the criterion layer, use a scaling method of 1 to 6 and its reciprocal to compare the relative importance of each factor in the criterion layer in pairs, and construct an initial judgment matrix; an entropy weight module 23, configured to construct an entropy weight matrix according to each factor using an entropy weight method; a correction module 24, configured to correct the initial judgment matrix according to the entropy weight matrix to obtain a corrected judgment matrix; a verification module 25, configured to determine the weight value of each factor and perform consistency verification; a scoring module 26, configured to determine the scoring rules for each factor, and calculate the score of each factor, and calculate the comprehensive score according to the score of each factor and the weight value; a result module 27, configured to determine the optimal site selection scheme for the power station according to the comprehensive score.

[0107] The device of the above embodiment is used to implement the corresponding pumped storage power station site selection method based on the improved hierarchical analysis method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0108] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the pumped-storage power station site selection method based on the improved analytic hierarchy process described in any of the above embodiments is implemented.

[0109] Figure 3 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040 and a bus 1050. It is characterized in that the processor 1010, the memory 1020, the input / output interface 1030 and the communication interface 1040 realize communication connection with each other inside the device through the bus 1050.

[0110] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0111] The memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0112] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured as a component in the device (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. It is characterized in that the input device can include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device can include a display, a speaker, a vibrator, an indicator light, etc.

[0113] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0114] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0115] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0116] The electronic device of the above embodiment is used to implement the corresponding pumped storage power station site selection method based on improved analytic hierarchy process in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0117] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the pumped-storage power station site selection method based on the improved hierarchical analysis method as described in any of the above embodiments.

[0118] The non-transitory computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of storage media for computers include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0119] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the pumped storage power station site selection method based on the improved hierarchical analysis method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0120] Based on the same concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer executes the pumped-storage power station site selection method based on the improved hierarchical analysis method as described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments and will not be repeated here.

[0121] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0122] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the device can be shown in the form of a block diagram, so as to avoid making the embodiments of the present application difficult to understand, and this also takes into account the following fact, that is, the details of the implementation method of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details to describe the exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0123] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0124] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A method for site selection of pumped storage power station based on improved analytic hierarchy process, characterized in that: include: Constructing a hierarchical model for site selection of a pumped storage power station, the hierarchical model comprising a target layer, a criterion layer and a scheme layer, the target layer being the optimal site selection scheme for the power station, the criterion layer comprising hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, and the scheme layer comprising multiple power station address schemes; The criterion layer is refined, and the relative importance of each factor of the criterion layer is compared pairwise using a scaling method of 1 to 6 and its reciprocal, so as to construct an initial judgment matrix; According to each factor, the entropy weight matrix is ​​constructed using the entropy weight method; Modify the initial judgment matrix according to the entropy weight matrix to obtain a modified judgment matrix; Determine the weight value of each factor according to the modified judgment matrix and perform consistency check; Determine the scoring rules for each factor, calculate the score of each factor, and calculate the comprehensive score based on the score of each factor and the weight value; The optimal site selection plan for the power station is determined based on the comprehensive score.

2. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 1, characterized in that: The refinement of the criterion layer includes: the hydrogeological factors include geomorphic conditions, geological conditions, climatic conditions, water source conditions and regional geological structure stability; the construction factors include traffic conditions, power supply conditions, water supply conditions and building materials conditions; the land acquisition factors include the occupied land area and the number of people to be relocated and resettled; the regional power grid factors include the distance to the load center and substation; the hub layout factors include the distance to height ratio, head section height and unit selection.

3. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 1, characterized in that: The scaling method of 1 to 6 and their reciprocals is defined as follows: The initial judgment matrix α ij It indicates the relative importance of the i-th factor relative to the j-th factor.

4. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 3 is characterized in that: The entropy weight matrix is ​​constructed by using the entropy weight method according to various factors, including: Calculate the standardized value of each factor relative to other factors The information entropy of each factor is calculated according to the standardized value E(i)=-Σ(p ij ×log2(p ij )), where p ij is the standardized value of the ith factor relative to the jth factor, The entropy weight is calculated according to the standardized value, and an entropy weight matrix ω=[ω1 ω2 ω3 ω4 ω5] is constructed, where ω i =1-E(i) / Σ(1-E(i)).

5. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 4 is characterized in that: The modified judgment matrix Among them, a′ ij =a ij ×ω i .

6. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 5, characterized in that: Determining the weight value of each factor according to the modified judgment matrix and performing consistency check includes: The initial weight vector W′=[w′1 w′2 w′3 w′4 w′5] of each factor is calculated according to the modified judgment matrix, where: The initial weight vector is normalized to obtain the final weight vector W = [w1 w2 w3 w4 w5], where Perform consistency check on the final weight vector and calculate the maximum eigenvalue λ max , and calculate the consistency ratio in, RI is the random consistency index; when CR < 0.1, the consistency check is passed; otherwise, the judgment matrix should be adjusted and corrected.

7. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 6, characterized in that: The comprehensive score Z C1 =[C 11 C 12 C 13 C 14 C 15 ]*W, where C 1i Assign a score to each factor.

8. The method for site selection of a pumped storage power station based on an improved analytic hierarchy process according to claim 1, characterized in that: Determining the optimal power station site selection plan according to the comprehensive score includes: determining the power station address plan with the largest comprehensive score as the optimal power station site selection plan.

9. A pumped storage power station site selection device based on improved analytic hierarchy process, characterized in that: include: A construction module is configured to construct a hierarchical model for the site selection of a pumped storage power station, wherein the hierarchical model includes a target layer, a criterion layer and a scheme layer, wherein the target layer is the optimal site selection scheme for the power station, the criterion layer includes hydrogeological factors, construction factors, land acquisition factors, regional power grid factors and hub layout factors, and the scheme layer includes multiple power station address schemes; a matrix module is configured to refine the criterion layer, compare the relative importance of each factor in the criterion layer in pairs using a scaling method of 1 to 6 and its reciprocal, and construct an initial judgment matrix; An entropy weight module is configured to construct an entropy weight matrix according to each factor using an entropy weight method; A correction module is configured to correct the initial judgment matrix according to the entropy weight matrix to obtain a corrected judgment matrix; A verification module, configured to determine the weight value of each factor according to the modified judgment matrix and perform consistency verification; A scoring module is configured to determine a scoring rule for each factor, calculate a score for each factor, and calculate a comprehensive score based on the score for each factor and the weight value; The result module is configured to determine the optimal site selection plan for the power station according to the comprehensive score.

10. An electronic device, characterized in that: It includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the pumped storage power station site selection method based on the improved analytic hierarchy process as described in any one of claims 1 to 8.

Images