A quantitative evaluation method for the spatial layout of power plant buildings

Abstract

This invention discloses a method for quantitatively evaluating the spatial layout of power plant buildings, including obtaining characteristic parameters of underground power plant buildings; calculating the excavation volume B of the main building of a single unit section and the equivalent volume C of the turbine unit of a single unit section using the parameters; the power plant building compact layout index A = C / B; and statistically analyzing the compact layout indices of power plant buildings from n similar engineering cases to form an array {A1, A2, A3, ..., A...}. n}, calculate the array {A1, A2, A3, ..., A n The average value μ and standard deviation σ are used to compare the power plant layout index A with the average value μ and standard deviation σ. Based on the comparison results, the layout of the power plant is evaluated. The method of this invention solves the problem that the current evaluation of power plant spatial layout mostly relies on qualitative judgment based on engineering experience and lacks a unified and scientific quantitative standard. It realizes the quantitative evaluation of power plant spatial layout and provides an optimization direction for the rational layout of power plant.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy and hydropower engineering design technology, specifically relating to a quantitative evaluation method for the spatial layout of power plant buildings. Background Technology

[0002] my country possesses abundant hydropower resources, with theoretical reserves ranking first in the world, 70% of which are located in the southwest region. Hydropower development is one of the directions of energy development. The high mountain and canyon areas of southwest China have fragile ecosystems and high seismic intensity, therefore underground power stations are often used for hydropower development. However, with the vigorous advancement of my country's water conservancy and hydropower industry, the scale of the main powerhouses of underground power stations is increasing daily, leading to increasingly prominent issues related to the stability of surrounding rock in large-span, high-sidewall caverns, posing a severe challenge to engineering construction. Therefore, optimizing the spatial layout of the main powerhouse is particularly important.

[0003] Currently, the evaluation of the main plant's spatial layout relies heavily on qualitative judgments based on engineering experience, lacking unified and scientific quantitative standards. Summary of the Invention

[0004] The purpose of this invention is to provide a quantitative evaluation method for the spatial layout of power plant buildings, in order to solve the problem that the current evaluation of the spatial layout of power plant main buildings relies mainly on qualitative judgment based on engineering experience, and lacks a unified and scientific quantitative standard.

[0005] To achieve the above objectives, the technical solution of this invention is as follows:

[0006] A method for quantitative evaluation of power plant building spatial layout, the method comprising:

[0007] Obtain characteristic parameters of the underground power plant building;

[0008] The excavation volume of the main powerhouse for a single unit section was calculated using the obtained characteristic parameters of the underground powerhouse. B ;

[0009] The equivalent volume of a single turbine unit is calculated using the obtained characteristic parameters of the underground power plant. C ;

[0010] Calculate the power plant building compact layout index A ,in A = C / B ;

[0011] statistics n A series of similar engineering case studies, including the power plant's intensive layout index, are used to form an array { A 1. A 2. A 3、...、 A n},inA n express n The power plant intensive layout index of the nth power station in a series of similar engineering cases;

[0012] Calculate array { A 1. A 2. A 3、...、 A n}average value m and standard deviation s ;

[0013] Power plant building intensive layout index A With the average value m The results are compared with the standard deviation σ, and conclusions are drawn about the layout of the power plant.

[0014] Furthermore, the characteristic parameters of the main powerhouse of the underground power station include the span of the main powerhouse. L Main plant height H Single unit section length L 1. Turbine runner diameter D Unit height H 1.

[0015] Furthermore, the excavation volume of the main plant of the single unit section... B = L · L 1· H .

[0016] Furthermore, the equivalent volume of the single-unit section turbine unit... C = D 2 · H 1.

[0017] Furthermore, the power plant building intensive layout index A With the average value m Compare with the standard deviation σ, including when m - σ≤A ≤μ + s At that time, the spatial layout of the power plant building to be evaluated was moderate; when A < m - s At that time, the spatial layout of the power plant building to be evaluated was relatively spacious; when A > m + s At that time, the power plant building layout was relatively compact.

[0018] The beneficial effects of this invention are:

[0019] The method of this invention can effectively solve the problem that the current evaluation of the main plant space layout relies on qualitative judgment based on engineering experience and lacks unified and scientific quantitative standards. It can realize the quantitative evaluation of the main plant space layout and provide a clear direction for the rational layout of the main plant. Attached Figure Description

[0020] Figure 1 This invention provides an analytical process for determining the quantitative evaluation criteria for the spatial layout of the main powerhouse of an underground power station.

[0021] Figure 2 This is a schematic elevation view of the main powerhouse model of the underground power station in this specific embodiment;

[0022] Figure 3 This is a schematic plan view of the main powerhouse model of the underground power station in this specific embodiment;

[0023] In the diagram: 1—Main plant, 2—Center line of the main plant unit, 3—Water turbine. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described herein are only some embodiments of this invention, not all embodiments, and are not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0025] This invention provides a method for quantitative evaluation of power plant building spatial layout, comprising the following steps:

[0026] Step 1: Obtain characteristic parameters of the main powerhouse of the underground power station

[0027] Obtain characteristic parameters of the main powerhouse of the underground power station, including the span of main powerhouse 1. L Main plant height H Single unit section length L 1. The diameter of the runner of turbine 3 D Unit height H 1. The unit for each indicator is m.

[0028] Step 2: Calculate the excavation volume of the main plant for a single unit section.

[0029] Based on step one, calculate the excavation volume of the main plant for a single unit section. B = L · L 1· H The unit is m 3 .

[0030] Step 3: Calculate the equivalent volume of a single turbine unit section.

[0031] Based on step two, calculate the equivalent volume of a single turbine unit section. C = D 2 · H 1. The unit is m 3 .

[0032] Step 4: Calculate the main plant's compact layout index

[0033] Based on steps two and three, calculate the intensive layout index of the main plant. A = C / B A is dimensionless and represents the space occupied by the turbine generator unit in the main powerhouse. The larger A is, the more compact the layout of the main powerhouse; the smaller A is, the more spacious the layout of the main powerhouse. This indicator can well reflect the compact layout of the main powerhouse.

[0034] Step 5: Statistics n A similar engineering case: intensive layout index of power plant main building

[0035] According to step four, statistics are performed. n The intensive layout index of the main powerhouse in a typical similar engineering case is formed into an array { A 1. A 2. A 3、...、 A n},in A n express n The intensive layout index of the nth power plant main building in a similar engineering case.

[0036] Step Six: Calculate the array mean and standard deviation

[0037] Based on step five, calculate the array { A 1. A 2. A 3、...、 A n}average value m and standard deviation s .

[0038] Step 7: Establish evaluation standards for the spatial layout of the main plant.

[0039] Based on step six, using the calculated array { A 1. A 2. A 3、...、 A n}average value m and standard deviation sAccording to statistical principles, when m - σ≤A ≤μ + s When the main plant to be evaluated is classified as a "moderate plant," it means that the spatial layout of the main plant is moderate; when A < m - s At that time, the main plant to be evaluated was described as a "relaxed plant", indicating that the main plant's spatial layout was relatively spacious. A > m + s At that time, the main plant to be evaluated was described as a "compact plant", indicating that the main plant's spatial layout was relatively compact.

[0040] The principles of the present invention will be further explained below with reference to specific embodiments.

[0041] The main components of a certain hydropower station project consist of a concrete double-curvature arch dam, flood discharge and energy dissipation structures, left and right bank water diversion and power generation systems, and diversion structures. The total installed capacity is 10,200 MW, and the total reservoir capacity is 7.408 billion cubic meters. 3 The underground powerhouse cavern complex adopts a parallel layout of the main powerhouse, main transformer tunnel and tailrace surge chamber. The maximum excavation dimensions (length × width × height) of the main powerhouse on the right bank are 333.00m × 32.50m (30.5m below the rock anchor beam) × 89.80m.

[0042] This invention utilizes a method for determining the quantitative evaluation criteria of the main powerhouse spatial layout in an underground power station to quantitatively evaluate the spatial layout of the main powerhouse in a hydropower station in this example. The evaluation process is as follows: Figure 1 As shown, the specific implementation process is as follows:

[0043] Step 1: As Figure 2 and Figure 3 As shown, the characteristic parameters of the main powerhouse of the underground power station are obtained. Figure 2 and Figure 3 The center line of the main plant unit is designated as No. 2.

[0044] Obtain the characteristic parameters of the main powerhouse of an underground hydropower station, including the span of the main powerhouse. L =30.5m, main plant height H =89.8m, single unit section length L 1=37m, turbine runner diameter D =9.7m, unit height H 1 = 58m.

[0045] Step 2: Calculate the excavation volume of the main plant for a single unit section.

[0046] Based on step one, calculate the excavation volume of the main plant for a single unit section. B = L · L 1·H =101339.3m 3 .

[0047] Step 3: Calculate the equivalent volume of a single turbine unit section.

[0048] Based on step two, calculate the equivalent volume of a single turbine unit section. C = D 2 · H 1 = 5457.22m 3 .

[0049] Step 4: Calculate the main plant's compact layout index

[0050] Based on steps two and three, calculate the intensive layout index of the main plant. A = C / B =0.054.

[0051] Step 5: Calculate the compact layout index of main plant buildings in similar engineering cases.

[0052] Based on step four, this example statistically analyzed the main plant layout indices of 20 similar engineering cases, as shown in Table 1, forming the main plant layout indices array {0.054, 0.052, 0.052, 0.046, 0.040, 0.040, 0.039, 0.039, 0.037, 0.036, 0.036, 0.034, 0.033, 0.031, 0.030, 0.030, 0.027, 0.026, 0.024, 0.023}.

[0053] Table 1. Compact Layout Index of Main Plant in Similar Engineering Cases

[0054]

[0055] Step Six: Calculate the array mean and standard deviation

[0056] Based on step five, calculate the average value of the array {0.054, 0.052, 0.052, 0.046, 0.040, 0.040, 0.039, 0.039, 0.037, 0.036, 0.036, 0.034, 0.033, 0.031, 0.030, 0.030, 0.027, 0.026, 0.024, 0.023}. m =0.0365 and standard deviation s =0.0092.

[0057] Step 7: Establish evaluation standards for the spatial layout of the main plant.

[0058] Based on step six, the average value of the calculated array {0.054, 0.052, 0.052, 0.046, 0.040, 0.040, 0.039, 0.039, 0.037, 0.036, 0.036, 0.034, 0.033, 0.031, 0.030, 0.030, 0.027, 0.026, 0.024, 0.023} is calculated. m =0.0365 and standard deviation s =0.0092, according to statistical principles, when 0.027 = m - σ≤A ≤μ + s When the value is 0.046, the main plant to be evaluated is a "moderate plant", indicating that the spatial layout of the main plant is moderate. A < m - σ= At a value of 0.027, the main plant to be evaluated is classified as a "relaxed plant," indicating that the main plant has a relatively spacious spatial layout. A > m + s When the coefficient is 0.046, the main powerhouse to be evaluated is a "compact powerhouse," indicating that the main powerhouse has a relatively compact spatial layout. This example illustrates the compact layout index of the main powerhouse of a hydropower station. A =0.054>0.046 indicates that the main powerhouse of the hydropower station is a "compact powerhouse" with a relatively compact spatial layout.

[0059] In fact, the layout of the underground powerhouse cavern complex on the right bank of this example project is located within a narrow triangular space enclosed by the riverbed, the Baigou fault, and extremely thin layers of marbled dolomite. This area is located in the core of a fold, with twisted and varied rock strata, centimeter-level thin-layered steeply dipping rock masses, and a large distribution of fractured rock masses with carbonaceous films attached to the bedding planes. To ensure the stability of the underground cavern complex, the structure of the main powerhouse cavern was appropriately optimized, resulting in a more compact layout than conventional hydropower stations, which effectively verifies the accuracy of this invention.

[0060] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for quantitatively evaluating the spatial layout of a power plant building, characterized in that, The method includes: Obtain characteristic parameters of the underground power plant building; The excavation volume of the main powerhouse for a single unit section was calculated using the obtained characteristic parameters of the underground powerhouse. B ; The equivalent volume of a single turbine unit is calculated using the obtained characteristic parameters of the underground power plant. C ; Calculate the power plant building compact layout index A ,in A = C / B ; statistics n A series of similar engineering case studies, including the power plant's intensive layout index, are used to form an array { A 1. A 2. A 3、...、 A n },in A n This represents the power plant intensive layout index of the nth power station; Calculate array { A 1. A 2. A 3、...、 A n }average value μ and standard deviation σ ; Power plant building intensive layout index A With the average value μ The layout of the power plant is evaluated based on the comparison results with the standard deviation σ. The power plant building intensive layout index A With the average value μ Compare with the standard deviation σ, including when μ - σ≤A ≤μ + σ At that time, the spatial layout of the power plant building to be evaluated was moderate; when A < μ - σ At that time, the spatial layout of the power plant building to be evaluated was relatively spacious; when A > μ + σ At that time, the power plant building layout was relatively compact.

2. The method for quantitative evaluation of power plant building spatial layout according to claim 1, characterized in that: The characteristic parameters of the underground power plant building include the span of the main building. L Main plant height H Single unit section length L 1. Turbine runner diameter D Unit height H 1.

3. The method for quantitative evaluation of power plant building spatial layout according to claim 1, characterized in that: The excavation volume of the main plant of the single unit section B = L · L 1· H ,in L The span of the main factory building, L 1 represents the length of a single unit section. H The height of the main factory building.

4. The method for quantitative evaluation of power plant building spatial layout according to claim 1, characterized in that: The equivalent volume of the single-unit section of the turbine unit C = D 2 · H 1, of which D For the turbine runner diameter, H 1 represents the unit height.

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