Method for obtaining fitness of photovoltaic power station built in mining area

Abstract

The invention provides a mining area construction photovoltaic power station fitness obtaining method, which comprises the steps of obtaining an electric quantity demand and a photovoltaic matching scale of an area where a mining area is located, and determining a photovoltaic electric quantity demand according to the electric quantity demand and the photovoltaic matching scale; wherein the photovoltaic matching scale is expressed by the installed capacity of photovoltaic power generation; obtaining the effective utilization area and the photovoltaic power generation power per unit area of the region, and determining the photovoltaic power generation power according to the effective utilization area and the photovoltaic power generation power per unit area; obtaining a photovoltaic power generation cost estimated value of the region; and according to the photovoltaic electric quantity demand, the photovoltaic power generation power and the power generation cost estimated value, determining the suitability of the regional construction photovoltaic power station. According to the scheme, a quantitative analysis result can be given for whether the area where the mining area is located is suitable for building the photovoltaic power station or not, a conclusion is given from the technical aspect, the photovoltaic power station built in the mining area can reasonably utilize solar radiation of the area where the mining area is located, and the cost is low.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation technology, and in particular to a method for obtaining the suitability of constructing a photovoltaic power station in a mining area. Background Technology

[0002] Currently, to fully utilize my country's solar energy resources, photovoltaic (PV) power plants should be established in areas with sufficient annual sunshine duration. Due to my country's unique topography, many coal mining areas in various provinces and cities meet the requirements for PV power plant construction. However, compared to conventional PV power plant construction, coal mining subsidence areas often have complex terrain, scattered topography, and even risks such as subsidence. PV power plants typically require flat, contiguous land. Under conditions of significant topographical defects, constructing PV power plants and ensuring reliable, stable, and continuous operation and maintenance presents considerable challenges. Furthermore, routine tasks such as power plant inspections and module cleaning also present significant difficulties. These challenges negatively impact the power generation efficiency of PV power plants. Therefore, a preliminary assessment is necessary to determine whether mining areas are suitable for PV power plant construction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing technology cannot determine whether a mining area is suitable for building a photovoltaic power station. To this end, the present invention proposes a method for obtaining the suitability of building a photovoltaic power station in a mining area.

[0004] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0005] This application provides a method for obtaining the suitability of constructing a photovoltaic power station in a mining area, including:

[0006] Obtain the electricity demand and photovoltaic (PV) capacity of the mining area, and determine the PV power demand based on the electricity demand and the PV capacity; wherein, the PV capacity is expressed as the installed capacity of PV power generation;

[0007] Obtain the effective utilization area and photovoltaic power generation per unit area of ​​the area, and determine the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area.

[0008] Obtain the estimated cost of photovoltaic power generation in the region;

[0009] The suitability of constructing a photovoltaic power station in the region is determined based on the photovoltaic power demand, the photovoltaic power generation capacity, and the estimated power generation cost.

[0010] Some schemes describe methods for determining the suitability of constructing photovoltaic power stations in mining areas, which involve obtaining the electricity demand and photovoltaic power generation scale of the mining area, and determining the photovoltaic electricity demand based on the electricity demand and photovoltaic power generation scale.

[0011] The electricity demand is obtained as follows: X1 = K1 × M; where K1 is the electricity consumption per ton of coal and M is the coal mine's production capacity.

[0012] Some schemes describe methods for determining the suitability of constructing photovoltaic power stations in mining areas, which involve obtaining the electricity demand and photovoltaic power generation scale of the mining area, and determining the photovoltaic electricity demand based on the electricity demand and photovoltaic power generation scale.

[0013] The photovoltaic power ratio is obtained in the following way:

[0014] To obtain the installed capacity of thermal power generation;

[0015] The installed capacity of photovoltaic power generation accounts for 30% to 50% of the installed capacity of thermal power generation.

[0016] Some schemes describe methods for determining the suitability of constructing photovoltaic power stations in mining areas, which involve obtaining the electricity demand and photovoltaic power generation scale of the mining area, and determining the photovoltaic electricity demand based on the electricity demand and photovoltaic power generation scale.

[0017] The photovoltaic power ratio is obtained in the following way:

[0018] The region category to which the region belongs is determined based on the solar radiation distribution of the region;

[0019] Obtain the photovoltaic power generation efficiency η for the region category, and the installed capacity of the photovoltaic power generation.

[0020] Some schemes describe methods for determining the suitability of constructing photovoltaic power stations in mining areas, which involve obtaining the electricity demand and photovoltaic power generation scale of the mining area, and determining the photovoltaic electricity demand based on the electricity demand and photovoltaic power generation scale.

[0021] The photovoltaic power ratio is obtained in the following way:

[0022] The installed capacity of the photovoltaic power generation is Q = k2 × X1, where k2 is the photoelectric coefficient, which takes a value in the range of 5 to 10.

[0023] Some schemes describe a method for obtaining the suitability of constructing photovoltaic power stations in mining areas. This method involves obtaining the effective utilization area and photovoltaic power generation per unit area of ​​the area, and determining the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area. The method includes:

[0024] Obtain the total area Sz of the region where the mining area is located;

[0025] The area conversion rate Zs is determined based on the land surface type of the region; wherein the land surface type includes flat land, hilly and gully land and mountainous land, and the area conversion rate of flat land is greater than that of hilly and gully land and mountainous land.

[0026] The effective utilization area is obtained as follows: Effective utilization area S = Total area Sz × Area conversion rate Zs.

[0027] Some schemes describe a method for obtaining the suitability of constructing photovoltaic power stations in mining areas, which includes obtaining the effective utilization area and photovoltaic power generation per unit area of ​​the area, and determining the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area. This method further includes:

[0028] Obtain the installed capacity G of photovoltaic power generation per unit area, where the value of G is determined based on the land surface type of the area;

[0029] The photovoltaic power generation is obtained as follows: P = S × G.

[0030] Some schemes describe methods for determining the suitability of constructing photovoltaic power stations in mining areas, including obtaining estimated photovoltaic power generation costs for the region:

[0031] The estimated cost of photovoltaic power generation is C = (C1 + C2) / (N × V);

[0032] Where: C1 represents the estimated input cost, C2 represents the estimated operation and maintenance cost, N represents the estimated annual power generation of the photovoltaic power station, and V represents the estimated service life of the photovoltaic power station.

[0033] Some schemes describe methods for determining the suitability of constructing photovoltaic power stations in mining areas, including obtaining estimated photovoltaic power generation costs for the region:

[0034] Estimated input cost C1 = Cost per watt of installed capacity C11 × Installed capacity G;

[0035] Estimated operation and maintenance cost C2 = Operation and maintenance cost per kilowatt C21 × Installed capacity G × Estimated service life V.

[0036] Some of the methods for obtaining the suitability of building photovoltaic power stations in mining areas described in the proposals also include:

[0037] The greater the electricity demand and the higher the photovoltaic power generation capacity, and the lower the estimated cost of photovoltaic power generation, the higher the suitability of the region for building a photovoltaic power station.

[0038] The technical solution of the present invention has the following technical effects compared with the prior art:

[0039] The present invention provides a method for determining the suitability of constructing a photovoltaic power station in a mining area. This method includes obtaining the electricity demand and photovoltaic (PV) power ratio scale of the mining area, and determining the PV electricity demand based on these figures. The PV power ratio scale is expressed as the installed capacity of PV power generation. The method also includes obtaining the effective utilization area and PV power generation per unit area of ​​the area, and determining the PV power generation per unit area. Furthermore, it involves obtaining an estimated PV power generation cost for the area, and finally determining the suitability of constructing a PV power station in the area based on the PV electricity demand, PV power generation, and estimated power generation cost. This method provides a quantitative analysis of whether a mining area is suitable for constructing a PV power station, offering a technical conclusion that allows for the rational utilization of solar radiation in the mining area at a relatively low cost. Attached Figure Description

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0041] Figure 1 A flowchart illustrating the method for obtaining the suitability of constructing a photovoltaic power station in a mining area, as provided in this application embodiment;

[0042] Figure 2 A flowchart illustrating the process of obtaining the effective utilization area of ​​a mining area for the construction of a photovoltaic power station, as provided in this application embodiment. Detailed Implementation

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] This application provides a method for obtaining the suitability of constructing a photovoltaic power station in a mining area, such as... Figure 1 As shown, including:

[0048] S10: Obtain the electricity demand and photovoltaic (PV) power ratio scale of the mining area, and determine the PV power demand based on the electricity demand and the PV power ratio scale; wherein, the PV power ratio scale is expressed as the installed capacity of PV power generation.

[0049] S20: Obtain the effective utilization area and photovoltaic power generation per unit area of ​​the area, and determine the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area.

[0050] S30: Obtain the estimated cost of photovoltaic power generation in the region.

[0051] S40: Determine the suitability of building a photovoltaic power station in the region based on the photovoltaic power demand, the photovoltaic power generation capacity, and the estimated power generation cost.

[0052] In the above scheme, information such as electricity demand and photovoltaic (PV) grid ratio can be obtained from the actual location of the mining area. Effective utilization area and PV power generation per unit area can be determined based on factors such as the flatness of the terrain. Suitability can be determined using a calculation model based on historical experience values.

[0053] In this embodiment, the above-described scheme can provide a quantitative analysis of whether the mining area is suitable for building a photovoltaic power station, and provide a technical conclusion, so that the photovoltaic power station built in the mining area can make reasonable use of the solar radiation in the mining area and has a low cost.

[0054] Preferably, in the above scheme, the step of obtaining the electricity demand and photovoltaic power generation scale of the mining area, and determining the photovoltaic power demand based on the electricity demand and the photovoltaic power generation scale, is as follows: the electricity demand is obtained by the following method: X1 = K1 × M; where K1 is the electricity consumption per ton of coal, and M is the coal mine production capacity. Since mining is a major electricity consumer, K1 can be taken as 10 kWh / ton, and M can be taken as tons / year.

[0055] In some other solutions, the process of obtaining the electricity demand and photovoltaic (PV) grid scale of the mining area, and determining the PV electricity demand based on the electricity demand and the PV grid scale, wherein the PV grid scale is obtained in the following manner:

[0056] The installed capacity of thermal power generation is obtained; the installed capacity of photovoltaic power generation accounts for 30% to 50% of the installed capacity of thermal power generation. In specific applications, the installed capacity Q of photovoltaic power generation can be indirectly obtained by calculating the installed capacity Q2 of thermal power generation, preferably using a 7:3 ratio.

[0057] It is sufficient to meet the requirements for green electricity allocation.

[0058] In this way,

[0059] In some schemes, the process of obtaining the electricity demand and photovoltaic (PV) grid capacity of the mining area, and determining the PV power demand based on the electricity demand and the PV grid capacity, involves:

[0060] The photovoltaic (PV) power ratio is obtained as follows: the region category is determined based on the solar radiation distribution of the region; the PV power generation efficiency η of the region category is obtained; and the installed capacity of the PV power generation is determined. Based on the distribution of solar radiation energy, regions are divided into three categories. Category I regions have a photovoltaic (PV) power generation efficiency (η) of 0.3, Category II regions have η of 0.2, and Category III regions have η of 0.1. Taking the Burtai Coal Mine as an example, located in the Shendong Mining Area under the jurisdiction of Ordos City, this region has an average annual sunshine duration of approximately 3000 hours, classifying it as a Category II region. The photovoltaic power generation efficiency (η) for Category II regions is 0.2 kWh / W. This means that the region has relatively abundant solar energy resources, with an annual total solar radiation of 5850–6680 MJ / m². 2 This is equivalent to a daily radiation dose of 4.5–5.1 kWh / m². 2 The annual sunshine duration is 3000-3200 hours. The Burtai Coal Mine itself consumes 200 million kWh of electricity annually and is located in the Shendong mining area, a coal production base with a capacity of 200 million tons. The coal mine consumes 100 million kWh of electricity for every 10 million tons of coal produced, and the electricity demand for 200 million tons of coal production is 2 billion kWh. The installed capacity of photovoltaic power generation at the Burtai Mine is Q = 2 / 0.2 = 1 million kilowatts.

[0061] In other solutions, the process of obtaining the electricity demand and photovoltaic (PV) grid scale of the mining area, and determining the PV electricity demand based on the electricity demand and the PV grid scale, involves:

[0062] The photovoltaic (PV) power generation capacity is obtained as follows: the installed capacity of PV power generation Q = k2 × X1, where k2 is the photoelectric coefficient, which ranges from 5 to 10. Because PV power generation efficiency varies with regional sunshine hours and annual radiation, the installed capacity of PV power generation can be determined based on the photoelectric coefficient, which is measured in watts.

[0063] In the above scheme, the effective utilization area and photovoltaic power generation per unit area of ​​the region are obtained, and the photovoltaic power generation is determined based on the effective utilization area and the photovoltaic power generation per unit area, such as... Figure 2 As shown, including:

[0064] S21: Obtain the total area Sz of the region where the mining area is located.

[0065] S22: Determine the area conversion rate Zs based on the surface type of the area; wherein the surface type includes flat land, hilly gullies and mountains, and the area conversion rate of flat land is greater than that of hilly gullies and mountains, which is greater than that of mountains; the area conversion rate Zs of flat land is 0.3, the area conversion rate Zs of hilly gullies is 0.2, and the area conversion rate Zs of mountains is 0.1.

[0066] S23: The effective utilization area is obtained as follows: Effective utilization area S = Total area Sz × Area conversion rate Zs.

[0067] This scheme allows for the determination of suitable areas for photovoltaic power station construction based on land surface type, making the calculated results more consistent with reality. For example, the Burtai Coal Mine has a total area Sz of 193 square kilometers, located in a hilly and gully region. With an area conversion rate Zs of 0.2, the effective utilization area of ​​the mine is S = Sz × Zs = 193 × 0.2 = 38.6 square kilometers.

[0068] In some other schemes, obtaining the effective utilization area and photovoltaic power generation per unit area of ​​the region, and determining the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area, further includes: obtaining the installed capacity G of photovoltaic power generation per unit area, where the value of G is determined according to the surface type of the region; 150,000 kW / km² for flat land, 50,000 kW / km² for hills and gullies, and 15,000 kW / km² for mountains; the photovoltaic power generation is obtained as follows: P = S × G. For example, in the Burtai Coal Mine, based on an installed capacity of 50,000 kW per square kilometer of photovoltaic power generation, its photovoltaic power generation P = 38.6 × 5 = 1,930,000 kW.

[0069] In some schemes, the process of obtaining the estimated cost of photovoltaic power generation in the region includes:

[0070] The estimated cost of photovoltaic power generation is calculated as C = (C1 + C2) / (N × V); where C1 represents the estimated input cost, C2 represents the estimated operation and maintenance cost, N represents the estimated annual power generation of the photovoltaic power station, and V represents the estimated service life of the photovoltaic power station. Further, the estimated input cost C1 = cost per watt of installed capacity C11 × installed capacity G; the estimated operation and maintenance cost C2 = operation and maintenance cost per kilowatt C21 × installed capacity G × estimated service life V. For example, in the Burtai Coal Mine, the input cost of the photovoltaic power station can be estimated at 5 yuan per watt. If a 1 million kilowatt installed capacity is built, the estimated input cost is 5 yuan / watt × 1 million kilowatts, and the annual operation and maintenance cost is 40 yuan per kilowatt, resulting in an annual operation and maintenance cost of 1 million kilowatts × 40 yuan / kilowatt. The annual power generation of a 1 million kilowatt installed capacity is 2 billion kilowatt-hours. The service life is approximately 25 years. The cost estimate can then be obtained using the above formula.

[0071] The above-mentioned method for obtaining the suitability of constructing photovoltaic power stations in mining areas also includes:

[0072] S50: The higher the electricity demand and the photovoltaic power generation capacity, and the lower the estimated photovoltaic power generation cost, the higher the suitability for building a photovoltaic power station in the area. Based on the installed capacity of photovoltaic power generation, three levels can be defined: ≤300,000 kW is classified as a small photovoltaic power station, 300,000–600,000 kW as a medium-sized photovoltaic power station, and >600,000 kW as a large photovoltaic power station. In practice, positive weight values ​​can be assigned to the electricity demand and the photovoltaic power generation capacity, and negative weight values ​​can be assigned to the estimated photovoltaic power generation cost. The suitability result is obtained by weighted summation. If the suitability is less than zero, it indicates that the mining area is not suitable for building a photovoltaic power station. If the suitability is greater than zero, the scale of the photovoltaic power station is determined based on the suitability range.

[0073] Based on the above plan, assuming the 3 million kilowatt photovoltaic power station occupies approximately 105,000 mu (about 6,333 hectares) of land, located in a hilly and gully area classified as a Class II region; 105,000 mu is approximately 70 square kilometers, and the photovoltaic installed capacity density G = 3 million kilowatts / 70 square kilometers = 42,800 kilowatts / square kilometer, after the photovoltaic power station is completed, it is expected to generate approximately 5.683 billion kilowatt-hours of electricity annually, saving approximately 1.7134 million tons of standard coal, and reducing emissions of carbon dioxide by approximately 4.7055 million tons, sulfur dioxide by approximately 573.97 tons, nitrogen oxides by approximately 863.81 tons, and particulate matter by approximately 125.02 tons. The annual power generation of a 3 million kilowatt installed capacity is 300 × 0.2 = 6 billion kilowatt-hours. This region is suitable for the construction of a photovoltaic power station.

[0074] Obviously, 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 here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for obtaining the suitability of constructing a photovoltaic power station in a mining area, characterized in that, include: The electricity demand and photovoltaic (PV) grid capacity of the mining area are obtained, and the PV power demand is determined based on the electricity demand and the PV grid capacity; wherein, the PV grid capacity is expressed as the installed capacity of PV power generation. Obtain the effective utilization area and photovoltaic power generation per unit area of ​​the area, and determine the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area. Obtain the estimated cost of photovoltaic power generation in the region; The suitability of constructing a photovoltaic power station in the region is determined based on the photovoltaic power demand, the photovoltaic power generation capacity, and the estimated power generation cost.

2. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 1, characterized in that, The process of obtaining the electricity demand and photovoltaic (PV) grid capacity of the mining area, and determining the PV electricity demand based on the electricity demand and PV grid capacity, involves: The electricity demand is obtained as follows: X1 = K1 × M; where K1 is the electricity consumption per ton of coal and M is the coal mine's production capacity.

3. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 2, characterized in that, The process of obtaining the electricity demand and photovoltaic (PV) grid capacity of the mining area, and determining the PV electricity demand based on the electricity demand and PV grid capacity, involves: The photovoltaic power ratio is obtained in the following way: To obtain the installed capacity of thermal power generation; The installed capacity of photovoltaic power generation accounts for 30% to 50% of the installed capacity of thermal power generation.

4. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 2, characterized in that, The process of obtaining the electricity demand and photovoltaic (PV) grid capacity of the mining area, and determining the PV electricity demand based on the electricity demand and PV grid capacity, involves: The photovoltaic power ratio is obtained in the following way: The region category to which the region belongs is determined based on the solar radiation distribution of the region; Obtain the photovoltaic power generation efficiency η for the region category, and the installed capacity of the photovoltaic power generation.

5. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 2, characterized in that, The process of obtaining the electricity demand and photovoltaic (PV) grid capacity of the mining area, and determining the PV electricity demand based on the electricity demand and PV grid capacity, involves: The photovoltaic power ratio is obtained in the following way: The installed capacity of the photovoltaic power generation is Q = k2 × X1, where k2 is the photoelectric coefficient, which takes a value in the range of 5 to 10.

6. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to any one of claims 1-5, characterized in that, The process of obtaining the effective utilization area and photovoltaic power generation per unit area of ​​the region, and determining the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area, includes: Obtain the total area Sz of the region where the mining area is located; The area conversion rate Zs is determined based on the land surface type of the region; wherein the land surface type includes flat land, hilly and gully land and mountainous land, and the area conversion rate of flat land is greater than that of hilly and gully land and mountainous land. The effective utilization area is obtained as follows: Effective utilization area S = Total area Sz × Area conversion rate Zs.

7. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 6, characterized in that, The step of obtaining the effective utilization area and photovoltaic power generation per unit area of ​​the region, and determining the photovoltaic power generation based on the effective utilization area and the photovoltaic power generation per unit area, further includes: Obtain the installed capacity G of photovoltaic power generation per unit area, where the value of G is determined based on the land surface type of the area; The photovoltaic power generation is obtained as follows: P = S × G.

8. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 7, characterized in that, In obtaining the estimated cost of photovoltaic power generation in the region: The estimated cost of photovoltaic power generation is C = (C1 + C2) / (N × V); Where: C1 represents the estimated input cost, C2 represents the estimated operation and maintenance cost, N represents the estimated annual power generation of the photovoltaic power station, and V represents the estimated service life of the photovoltaic power station.

9. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 8, characterized in that, In obtaining the estimated cost of photovoltaic power generation in the region: Estimated input cost C1 = Cost per watt of installed capacity C11 × Installed capacity G; Estimated operation and maintenance cost C2 = Operation and maintenance cost per kilowatt C21 × Installed capacity G × Estimated service life V.

10. The method for obtaining the suitability of constructing a photovoltaic power station in a mining area according to claim 8, characterized in that, Also includes: The greater the electricity demand and the higher the photovoltaic power generation capacity, and the lower the estimated cost of photovoltaic power generation, the higher the suitability of the region for building a photovoltaic power station.

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