A fully impervious reservoir for a pumped-storage power station

Abstract

The present invention provides a fully reservoir-sealed reservoir for a pumped-storage power station, which adopts a closed structure and includes a main body of the fully reservoir-sealed reservoir, a reservoir basin anti-seepage structure, a reservoir inlet / outlet, a wave wall, columns, a top cover and upper equipment and facilities; the reservoir basin anti-seepage structure includes a reservoir bottom anti-seepage structure and a reservoir slope anti-seepage structure; the top cover completely closes the top opening of the main body of the fully reservoir-sealed reservoir; the top cover, the wave wall, the reservoir slope anti-seepage structure and the reservoir bottom anti-seepage structure enclose a closed structure. On the top cover, the upper equipment and facilities are arranged. Due to the adoption of the closed structure, evaporation and icing of the reservoir water can be avoided, the scale of the building can be reduced, the anti-seepage structure can be optimized, equipment and facilities can be arranged on the reservoir surface, the reservoir water can be used as cleaning and cooling water, land, water resources and project investment can be saved, and it has wide guiding and popularizing significance.

Description

Technical Field

[0001] The invention belongs to the technical fields of hydropower and solar power generation, and particularly relates to a fully reservoir-sealed reservoir for a pumped storage power station. Background Art

[0002] At present, all fully reservoir-sealed reservoirs for pumped storage power stations are open-air type, and the reservoir area is at least hundreds of thousands of square meters. Due to sunlight exposure, cold invasion, etc., a large amount of reservoir water evaporates and freezes. When replenishing water to the reservoir, the water volume lost due to evaporation of the reservoir water must be considered, and a freezing storage capacity must be reserved in the total storage capacity; the anti-seepage structure of the reservoir basin must also adopt corresponding measures to avoid or reduce ultraviolet rays, thermal aging, high-temperature deformation, low-temperature freeze-thaw or freeze-break damage, etc. For example: The asphalt concrete panel is at least composed of a leveling and bonding layer, an anti-seepage layer and a sealing layer. The surface asphalt mastic sealing layer is mainly used to protect the anti-seepage layer from the influence of ultraviolet rays and air and the abrasion of sliding ice and snow. The anti-seepage layer in low-temperature areas uses modified asphalt concrete to avoid the freeze-break damage of ordinary asphalt concrete. In high-temperature areas, a spray cooling system is installed around the entire reservoir to cool down through a water film to avoid the high-temperature slope flow of the panel; for the reinforced concrete panel, high anti-freeze-grade concrete must be selected (not less than F100 in mild areas, not less than F200 / F300 when the annual freeze-thaw cycle times in cold areas are less than / greater than or equal to 100 times, and not less than F300 / F400 when the annual freeze-thaw cycle times in severe cold areas are less than / greater than or equal to 100 times) to avoid freeze-thaw damage, and a polymer material sealing layer is set on the surface to reduce the saturation degree of the concrete to avoid the freeze-thaw and frost heave damage of the panel and the freezing damage between the ice cover on the reservoir surface and the panel; for the geomembrane, carbon black and other powder particles are added to the polymer to avoid aging decomposition caused by ultraviolet rays, but usually the addition is uneven, seriously affecting the long-term use performance of the geomembrane, and a covering layer is laid on the surface to reduce the polymer degradation caused by the acceleration of the cold and heat effects. To prevent large dirt from being blown into the unit by the wind, a trash rack must be installed in front of the inlet / outlet of the reservoir. The application of these measures requires a large amount of engineering investment and operation and maintenance costs, and directly affects the overall quality and operation safety of the anti-seepage system.

[0003] At the same time, solar power stations are newly built, operated and maintained separately. The photovoltaic modules of photovoltaic power stations and the mirror arrangements of solar thermal power stations require a large area. A large amount of water is required for cleaning and cooling. Affected by the randomness and intermittency of solar energy, the power generation volatility is relatively large. Direct grid connection not only greatly affects the safe and stable operation of the power grid, but also generally exists the phenomenon that it has to be shut down when the power grid cannot absorb the power. Summary of the Invention

[0004] In view of the defects existing in the prior art, the invention provides a fully reservoir-sealed reservoir for a pumped storage power station, which can effectively solve the above problems.

[0005] The technical solution adopted by the invention is as follows:

[0006] The present invention provides a fully reservoir-sealing reservoir for a pumped-storage power station. The fully reservoir-sealing reservoir for the pumped-storage power station adopts a closed structure, and includes a main body of the fully reservoir-sealing reservoir, a reservoir basin sealing structure (1), a reservoir inlet / outlet (2), a wave wall (3), columns (4), a top cover (5), and upper equipment and facilities (6);

[0007] The reservoir basin sealing structure (1) includes a reservoir bottom sealing structure (1.1) and a reservoir slope sealing structure (1.2); the reservoir bottom sealing structure (1.1) is laid on the reservoir bottom of the main body of the fully reservoir-sealing reservoir and completely covers the reservoir bottom; the reservoir slope sealing structure (1.2) is laid on the reservoir slopes of the main body of the fully reservoir-sealing reservoir and completely covers the reservoir slopes;

[0008] A number of the columns (4) are evenly arranged on the upper surface of the reservoir bottom sealing structure (1.1); a continuous circle of the wave wall (3) is arranged on the reservoir side of the reservoir top and the dam top of the main body of the fully reservoir-sealing reservoir, and the top surfaces of the wave wall (3) and the columns (4) are at the same elevation;

[0009] The top cover (5) that completely closes the top opening of the main body of the fully reservoir-sealing reservoir is arranged on the wave wall (3) and the columns (4); the top cover (5), the wave wall (3), the reservoir slope sealing structure (1.2), and the reservoir bottom sealing structure (1.1) enclose a closed structure;

[0010] The reservoir inlet / outlet (2) that is hermetically connected to the main body of the fully reservoir-sealing reservoir is arranged below one side of the reservoir bottom sealing structure (1.1); the upper equipment and facilities (6) are arranged on the top cover (5).

[0011] Preferably, the reservoir bottom sealing structure (1.1) and the reservoir slope sealing structure (1.2) adopt one or a combination of materials such as asphalt concrete panels, reinforced concrete panels, geomembranes, and clay for anti-seepage;

[0012] Among them: the asphalt concrete panel is only composed of a leveling and bonding layer and an anti-seepage layer, and there is no asphalt mastic sealing layer on the surface layer. The anti-seepage layer in low-temperature regions adopts ordinary asphalt concrete, and there is no panel spray cooling system in high-temperature regions; the reinforced concrete panel selects concrete with a low frost resistance grade F50, and there is no polymer material sealing layer on the surface; the geomembrane used for the geomembrane does not contain carbon black powder particles that resist the action of ultraviolet rays, and there is no concrete block or sand layer covering layer for preventing sunlight irradiation on the surface.

[0013] Preferably, there is no trash rack in front of the reservoir inlet / outlet (2).

[0014] Preferably, the wave wall (3) is a reinforced concrete structure.

[0015] Preferably, there are no less than 3 columns (4), which are made of reinforced concrete structure or steel structure. The depth of the column bottom into the stable foundation surface of the reservoir basin is not less than 2m, and they are evenly arranged in the reservoir without affecting the normal operation of the reservoir inlet / outlet (2).

[0016] Preferably, the top cover (5) is a reinforced concrete slab-beam structure, and a movable cover plate (8) is provided at the corresponding position of the gate well of the reservoir inlet / outlet (2). The movable cover plate (8) is only opened when the reservoir is inspected or maintained.

[0017] Preferably, the upper equipment and facilities (6) include the buildings and structures of the pumped-storage power station, and also include a solar power station (7) planned and constructed synchronously with the pumped-storage power station.

[0018] Preferably, the solar power station (7) is a photovoltaic power station or a solar thermal power station, which operates jointly with the pumped-storage power station. Its power generation preferentially meets the production and living electricity needs of the pumped-storage power station including unit pumping, and the surplus part is supplied to the power grid by using the transmission system (9) of the pumped-storage power station.

[0019] Preferably, when the solar power station (7) is a photovoltaic power station, photovoltaic modules of the photovoltaic power station are laid on the surface of the solar power station foundation of the top cover (5); when the solar power station (7) is a solar thermal power station, mirrors of the solar thermal power station are laid on the surface of the solar power station foundation of the top cover (5);

[0020] A water pump (10) is provided above the bottom anti-seepage structure (1.1) of the reservoir and near the gate well of the reservoir inlet / outlet (2); one end of the water outlet of the water pump (10) is connected to one end of a connecting pipe (11); the other end of the connecting pipe (11) passes through the top cover (5) and is connected to a water delivery pipeline with a nozzle above the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station;

[0021] The solar power station foundation has a current collecting surface. A centralized sedimentation and filtration tank (12) is provided on the current collecting side of the solar power station foundation and outside the top cover (5); the centralized sedimentation and filtration tank (12) is communicated with the reservoir inlet / outlet pipeline in front of the reservoir inlet / outlet (2) through a pipeline;

[0022] When the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station in the solar power station (7) need to be cleaned and cooled, water is pumped from the reservoir basin of the pumped-storage power station through the water pump (10) and the connecting pipeline (11), and is directly sprayed onto the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station through the nozzles of the water diversion pipeline; then, the sprayed water converges into the centralized sedimentation and filtration tank (12), and after sedimentation and filtration by the centralized sedimentation and filtration tank (12), it flows back into the interior of the main body of the fully reservoir-sealed reservoir through a pipeline.

[0023] A fully reservoir-sealed reservoir of a pumped-storage power station provided by the present invention has the following advantages:

[0024] (1) Evaporation and icing of the reservoir water are avoided. The reservoir does not consider the make-up water volume for evaporation loss and does not reserve a freezing storage capacity, greatly reducing the scale of the reservoir basin and the water supply buildings; no pollutants enter the reservoir, and the installation of trash racks in front of the reservoir inlet / outlet is cancelled;

[0025] (2) Measures to avoid or reduce thermal aging, high-temperature deformation, low-temperature freeze-thaw and freeze-break damage of the reservoir basin anti-seepage structure are cancelled, greatly optimizing the common anti-seepage structure types and material compositions. For example: no bituminous mastic sealing layer is provided on the surface of the asphalt concrete face slab; the anti-seepage layer in low-temperature areas uses ordinary asphalt concrete; no panel spray cooling system is provided in high-temperature areas; the reinforced concrete face slab selects concrete with a low frost resistance grade of F50 and no polymer material sealing layer is provided on the surface; no carbon black and other powder particles are added to the polymer of the geomembrane, and no concrete blocks or sand layers for preventing sunlight irradiation are covered on the surface.

[0026] (3) The reservoir is fully utilized. The reservoir surface is arranged with the equipment and facilities of the pumped-storage power station and the co-located and co-operated photovoltaic power generation project or solar thermal power station, and the reservoir water is used as the required cleaning and cooling water.

[0027] (4) It greatly saves land resources and water resources, improves the overall quality and operation safety of the reservoir anti-seepage system, and the investment in a single project can be reduced by tens of millions of yuan, having broad guiding and promotional significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a plan view below the reservoir top of a schematic fully reservoir-sealed reservoir of a pumped-storage power station of the present invention;

[0029] Figure 2 is a plan view above the top cover of a schematic fully reservoir-sealed reservoir of a pumped-storage power station of the present invention;

[0030] Figure 3 is a sectional view taken along line A-A of a schematic fully reservoir-sealed reservoir of a pumped-storage power station of the present invention;

[0031] Wherein:

[0032] 1 - Reservoir basin anti-seepage structure; 2 - Reservoir inlet / outlet; 3 - Wave wall; 4 - Column; 5 - Top cover; 6 - Upper equipment and facilities; 7 - Solar power station; 8 - Movable cover plate; 9 - Transmission system; 10 - Water pump; 11 - Connecting pipeline; 12 - Sedimentation and filtration tank

[0033] 1.1 - Reservoir bottom anti-seepage structure; 1.2 - Reservoir slope anti-seepage structure Specific implementation manners

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0035] The purpose of the present invention is to provide a pumped-storage power station full-reservoir anti-seepage reservoir. By covering the reservoir top, the setting of the frozen reservoir capacity and trash racks of the reservoir can be cancelled, and at the same time, the make-up water volume can be reduced, and the project investment can be greatly reduced; at the same time, a jointly built and jointly operated solar power station is arranged on the reservoir surface, and the reservoir water is used as cleaning and cooling water. Its generated electricity is preferentially consumed locally, and the remaining electricity is then jointly bundled and transmitted. It saves land and water resources, improves the power generation and the utilization rate of the transmission system, reduces the impact of the volatility of solar power generation on the safe and stable operation of the power grid, and reduces the power system reserve and project investment

[0036] Reference Figures 1 to 3 Referring to

[0037]

[0038]

[0039]

[0040] a pumped-storage power station full-reservoir anti-seepage reservoir is provided by the present invention. The pumped-storage power station full-reservoir anti-seepage reservoir adopts a closed structure, including a full-reservoir anti-seepage reservoir main body, a reservoir basin anti-seepage structure 1, a reservoir inlet / outlet 2, a wave wall 3, a column 4, a top cover 5 and upper equipment and facilities 6;

[0040] The reservoir basin anti-seepage structure 1 includes a reservoir bottom anti-seepage structure 1.1 and a reservoir slope anti-seepage structure 1.2; the reservoir bottom anti-seepage structure 1.1 is laid on the reservoir bottom of the full-reservoir anti-seepage reservoir main body and completely covers the reservoir bottom; the reservoir slope anti-seepage structure 1.2 is laid on the reservoir slope of the full-reservoir anti-seepage reservoir main body and completely covers the reservoir slope;

[0038] On the upper surface of the reservoir bottom anti-seepage structure 1.1, several columns 4 are evenly arranged; a circle of wave walls 3 is continuously arranged on the reservoir top of the full-reservoir anti-seepage reservoir main body and on the reservoir side of the dam top, and the top surfaces of the wave wall 3 and the column 4 are at the same elevation;

[0039] On the wave wall 3 and the column 4, a top cover 5 is provided to completely close the top opening of the full-reservoir anti-seepage reservoir main body; the top cover 5, the wave wall 3, the reservoir slope anti-seepage structure 1.2 and the reservoir bottom anti-seepage structure 1.1 enclose a closed structure;

[0040] A reservoir inlet / outlet 2 that is hermetically connected to the main body of the fully impermeable reservoir is provided below one side of the bottom impermeable structure 1.1; upper equipment and facilities 6 are arranged on the top cover 5.

[0041] It can be seen that a fully impermeable reservoir of a pumped-storage power station provided by the present invention forms a fully enclosed structure through the basin impermeable structure 1, the wave wall 3 and the top cover 5, rather than the open-air structure in the prior art. Moreover, the top cover 5 is a reinforced concrete slab-beam structure, and upper equipment and facilities 6 are arranged above the top cover 5, thus bringing the following advantages:

[0042] (1) Since a fully enclosed structure is adopted, the evaporation amount of the reservoir water can be effectively reduced, and the design of the reservoir does not need to consider the evaporation of the reservoir water.

[0043] (2) Since a fully enclosed structure is adopted, and the top cover 5 is a reinforced concrete slab-beam structure, combined with the isolation effect of the upper equipment and facilities 6 above the top cover 5, the interior of the reservoir can be effectively insulated in low-temperature weather, and the water inside the reservoir will not freeze when the pumped-storage power station operates normally. Therefore, the design of the reservoir does not need to consider the freezing loss of the reservoir water.

[0044] Similarly, due to the above structural features of the present invention, in high-temperature weather, it can play a role in cooling and heat insulation inside the reservoir.

[0045] Furthermore, since the water inside the reservoir does not freeze in low-temperature weather, the interior of the reservoir has a cooling effect in high-temperature weather, and because the closed structure can prevent the basin impermeable structure 1 from being irradiated by ultraviolet rays, the structure adopted by the present invention can significantly reduce the performance requirements for the impermeable layer of the basin impermeable structure 1, thereby reducing costs.

[0046] In the present invention, the bottom impermeable structure 1.1 and the slope impermeable structure 1.2 can adopt one or a combination of materials such as asphalt concrete panels, reinforced concrete panels, geomembranes and clay for anti-seepage; and are connected to the reservoir inlet / outlet 2 to form a closed fully impermeable reservoir system.

[0047] Among them: Since the impermeable layer is not affected by ultraviolet rays, air and the abrasion of sliding snow and ice, in the present invention, the asphalt concrete panel is only composed of a leveling and bonding layer and an impermeable layer, and no asphalt mastic sealing layer is provided on the surface layer, which can fully meet the performance requirements for use.

[0048] In low-temperature regions, due to the heat preservation effect inside the reservoir of the present invention, the impermeable layer in low-temperature regions can use ordinary asphalt concrete, which will not be frozen and damaged, and there is no need to use modified asphalt concrete;

[0049] Since this structure can play a role in cooling and heat insulation inside the reservoir in high-temperature weather, a panel spray cooling system is not provided in high-temperature regions;

[0050] In summary, when an asphalt concrete face slab is adopted, the asphalt concrete face slab consists only of a leveling and bonding layer and an anti-seepage layer, and no asphalt mastic sealing layer is provided on the surface layer. The anti-seepage layer in low-temperature regions adopts ordinary asphalt concrete, and no face slab spray cooling system is provided in high-temperature regions.

[0051] When a reinforced concrete face slab is adopted, the reinforced concrete face slab selects concrete with a low frost resistance grade of F50, and no polymer material sealing layer is provided on the surface; when a geomembrane is adopted, no powder particles such as carbon black that resist the action of ultraviolet rays are added to the geomembrane polymer used for the geomembrane, and no covering layer such as concrete blocks or sand layers that prevent sunlight irradiation is provided on the surface.

[0052] In the present invention, no trash rack is provided in front of the reservoir inlet / outlet 2.

[0053] In the present invention, the wave wall 3 is of a reinforced concrete structure and is continuously arranged along the reservoir side of the reservoir top and the dam top.

[0054] In the present invention, there are no less than 3 columns 4, which adopt a reinforced concrete structure or a steel structure. The depth of the column bottom into the stable foundation surface of the reservoir basin is not less than 2 m, and they are evenly arranged in the reservoir without affecting the normal operation of the reservoir inlet / outlet 2.

[0055] The top cover 5 is of a reinforced concrete slab-beam structure, and a movable cover plate 8 is provided at the corresponding position of the gate well of the reservoir inlet / outlet 2. The movable cover plate 8 is only opened when the reservoir is inspected or maintained.

[0056] The upper equipment and facilities 6 are located on the top cover 5, including the buildings and structures of the pumped storage power station. For example, the buildings (structures) such as the duty room, observation room, and switch station of the pumped storage power station; it also includes the equipment and facilities of the solar power station 7 planned and constructed synchronously with the pumped storage power station.

[0057] The solar power station 7 is a photovoltaic power station or a solar thermal power station, and operates in combination with the pumped storage power station. Its generated electricity preferentially meets the production and living electricity needs of the pumped storage power station, including unit pumping, etc., and the surplus part is then supplied to the power grid through the transmission system 9 of the pumped storage power station.

[0058] When the solar power station 7 is a photovoltaic power station, photovoltaic modules of the photovoltaic power station are laid on the surface of the solar power station foundation of the top cover 5; when the solar power station 7 is a solar thermal power station, mirrors of the solar thermal power station are laid on the surface of the solar power station foundation of the top cover 5;

[0059] At a position above the bottom anti-seepage structure 1.1 and close to the gate well of the reservoir inlet / outlet 2, a water pump 10 is provided; one end of the water outlet of the water pump 10 is connected to one end of the connecting pipe 11; the other end of the connecting pipe 11 passes through the top cover 5 and is connected to a water delivery pipe with a nozzle above the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station;

[0060] The foundation of the solar power station has a current collecting surface. A centralized sedimentation and filtration tank 12 is arranged on the current collecting side of the foundation of the solar power station and outside the top cover 5; the centralized sedimentation and filtration tank 12 is communicated with the reservoir inlet / outlet pipe in front of the reservoir inlet / outlet 2 through a pipeline.

[0061] When the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station of the solar power station 7 need to be cleaned and cooled, water is pumped from the reservoir basin of the pumped-storage power station through the water pump 10 and the connecting pipeline 11, and is directly sprayed onto the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station through the nozzles of the water diversion pipeline; then, the sprayed water converges into the centralized sedimentation and filtration tank 12, and after being sedimented and filtered by the centralized sedimentation and filtration tank 12, it flows back into the interior of the main body of the fully reservoir-sealed reservoir through a pipeline.

[0062] Therefore, the cleaning and cooling water required by the solar power station 7, such as the cleaning and cooling water for the photovoltaic modules of the photovoltaic power station or the mirrors of the solar thermal power station, etc., is all pumped from the reservoir basin of the pumped-storage power station through the water pump 10 arranged at the bottom of the reservoir and the connecting pipeline 11, and after being used, it converges into the centralized sedimentation and filtration tank 12 for treatment and then flows back into the reservoir.

[0063] Therefore, the fully reservoir-sealed reservoir of the pumped-storage power station provided by the present invention makes full use of the reservoir, and the equipment and facilities of the pumped-storage power station and the photovoltaic power generation project or the solar thermal power station are arranged on the reservoir surface, enabling the joint construction and operation of the pumped-storage power station and the photovoltaic power generation project or the solar thermal power station, and having the following advantages: (1) The photovoltaic power generation project or the solar thermal power station is arranged above the fully reservoir-sealed reservoir of the pumped-storage power station, which can save land resources; (2) The photovoltaic power generation project or the solar thermal power station and the pumped-storage power station share the same facilities and buildings, for example, the power transmission system, etc., thus reducing the overall cost; (3) The reservoir water is directly used as the cleaning and cooling water for the photovoltaic power generation project or the solar thermal power station, and since the reservoir water and the photovoltaic power generation project or the solar thermal power station are very close, it can save water resources and reduce the engineering quantity and cost of pipeline laying; (4) The pumped-storage power station and the photovoltaic power generation project or the solar thermal power station generate electricity jointly. The electricity generated by the photovoltaic power generation project or the solar thermal power station is preferentially consumed locally, and the remaining electricity is then jointly bundled and sent out, reducing the impact of the volatility of solar power generation on the safe and stable operation of the power grid and reducing the power system reserve and project investment.

[0064] The following further illustrates by taking a fully reservoir-sealed upper reservoir of a pumped-storage power station adopting the technical solution of the present invention as an example in combination with the attached drawings:

[0065] As Figures 1 to 3As shown in the figure, the upper reservoir of a pumped-storage power station with full reservoir anti-seepage is located in an area with severe cold in winter and sweltering heat in summer. When designed as an open-air reservoir, the annual evaporation loss of reservoir water is 700,000 cubic meters, and the frozen storage capacity loss is 300,000 cubic meters. After adopting the closed structure proposed by the present invention, which consists of a reservoir basin anti-seepage structure 1, a reservoir inlet / outlet 2, a wave wall 3, columns 4, a top cover 5, and upper equipment and facilities 6, the evaporation and freezing of reservoir water are avoided, and there is no need to consider the corresponding makeup water volume and frozen storage capacity, greatly reducing the scale of the reservoir basin and makeup water buildings.

[0066] The reservoir basin anti-seepage structure 1 includes a reservoir bottom anti-seepage structure 1.1 and a reservoir slope anti-seepage structure 1.2, which adopts a combined anti-seepage of two materials, geomembrane and asphalt concrete panel, and is closed-connected with the reservoir inlet / outlet 2 to form a closed full-reservoir anti-seepage system. There is no carbon black or other powder particles in the polymer of the reservoir bottom geomembrane, and no covering layer for preventing sunlight irradiation is provided on the surface; the reservoir slope asphalt concrete panel consists only of an 8-cm-thick leveling and bonding layer and a 10-cm-thick anti-seepage layer. The anti-seepage layer is all made of ordinary asphalt concrete, and no asphalt mastic sealing layer and panel spray cooling system are provided on its surface layer.

[0067] No trash rack is provided in front of the reservoir inlet / outlet 2. The wave wall 3 is a continuous reinforced concrete structure with a thickness of 50 cm, and is continuously arranged along the side of the reservoir top and dam top facing the reservoir. The columns 4 are reinforced concrete cylinders, a total of 6. The bottom of the columns penetrates 3 m below the stable foundation of the reservoir basin, and is evenly arranged in the reservoir without affecting the normal operation of the reservoir inlet / outlet 2. The top cover 5 is located on the wave wall 3 and columns 4, and adopts a reinforced concrete slab-beam structure. A rectangular movable cover 8 is provided at the corresponding position of the gate well of the reservoir inlet / outlet 2, and is only opened when the reservoir is inspected or repaired.

[0068] The upper equipment and facilities 6 are arranged on the top cover 5. In addition to buildings and structures such as the duty room, observation room, and switch station of the pumped-storage power station, there are also photovoltaic-type equipment and facilities such as a solar power station 7 planned and constructed synchronously with the pumped-storage power station, mainly including photovoltaic modules, busbar boxes, inverters, etc. The cleaning water for the photovoltaic modules is all pumped from the reservoir of the pumped-storage power station through pumps and pipelines, and flows back to the reservoir after treatment. The photovoltaic power station operates in combination with the pumped-storage power station, and its generated electricity preferentially meets the production and living electricity needs such as the pumping of the units of the pumped-storage power station, and the excess part is supplied to the power grid through the transmission system 9 of the pumped-storage power station.

[0069] By adopting the above technical solutions disclosed by the present invention, the following beneficial effects are obtained:

[0070] (1) The evaporation and freezing of reservoir water are avoided. The reservoir does not consider the makeup water volume for evaporation loss and does not reserve frozen storage capacity, greatly reducing the scale of the reservoir basin and makeup water buildings; no dirt enters the reservoir, and the trash rack setting in front of the reservoir inlet / outlet is cancelled;

[0071] (2)Eliminated the measures for avoiding or reducing thermal aging, high-temperature deformation, low-temperature freeze-thaw and freeze-break damage of the reservoir basin anti-seepage structure, and greatly optimized the common anti-seepage structure types and material compositions. For example, no bituminous mastic sealing layer is provided on the surface of the asphalt concrete face slab; ordinary asphalt concrete is used for the anti-seepage layer in low-temperature areas, and no face slab spray cooling system is provided in high-temperature areas; for the reinforced concrete face slab, concrete with a low frost resistance grade of F50 is selected, and no polymer material sealing layer is provided on the surface; no powder particles such as carbon black are added to the polymer of the geomembrane, and no concrete blocks or sand layers for preventing sunlight irradiation are covered on the surface.

[0072] (3)Make full use of the reservoir, arrange the equipment and facilities of the pumped-storage power station and the jointly constructed and jointly operated photovoltaic power generation project or solar thermal power generation station on the reservoir surface, and use the reservoir water as the required cleaning and cooling water.

[0073] (4)Greatly saved land resources and water resources, improved the overall quality and operation safety of the reservoir anti-seepage system, and the investment of a single project can be reduced by tens of millions of yuan, which has broad guiding and promotional significance.

[0074] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A pumped storage power station full reservoir anti-seepage reservoir, characterized in that: The pumped storage power station full-storage anti-seepage reservoir adopts a closed structure, including a full-storage anti-seepage reservoir body, a reservoir basin anti-seepage structure (1), a reservoir inlet / outlet (2), a wave-breaking wall (3), a column (4), a top cover (5) and upper equipment and facilities (6); The reservoir basin anti-seepage structure (1) comprises a reservoir bottom anti-seepage structure (1.1) and a reservoir slope anti-seepage structure (1.2); the reservoir bottom anti-seepage structure (1.1) is laid on the reservoir bottom of the full reservoir anti-seepage reservoir body and completely covers the reservoir bottom; the reservoir slope anti-seepage structure (1.2) is laid on the reservoir slope of the full reservoir anti-seepage reservoir body and completely covers the reservoir slope; The reservoir bottom anti-seepage structure (1.1) and the reservoir slope anti-seepage structure (1.2) are anti-seepage using a combination of one or more materials selected from asphalt concrete panels, reinforced concrete panels, geomembranes and clay; Among them: the asphalt concrete panel is composed of only a leveling bonding layer and an anti-seepage layer, and the surface is not provided with an asphalt mastic sealing layer. The anti-seepage layer in low-temperature areas uses ordinary asphalt concrete, and the panel spray cooling system is not provided in high-temperature areas; the reinforced concrete panel uses concrete with a low antifreeze grade of F50, and the surface is not provided with a polymer material sealing layer; the geomembrane polymer used in the geomembrane does not contain carbon black powder particles that resist ultraviolet rays, and the surface is not provided with a concrete block or sand layer covering layer to prevent sunlight exposure; A plurality of the columns (4) are evenly arranged on the reservoir bottom anti-seepage structure (1.1); a circle of wave-breaking walls (3) are continuously arranged on the reservoir top and the reservoir side of the dam top of the full-reservoir anti-seepage reservoir body, and the top surfaces of the wave-breaking walls (3) and the columns (4) are located at the same elevation; The top cover (5) is arranged on the wave-breaking wall (3) and the column (4) to completely close the top opening of the whole reservoir anti-seepage reservoir body; the top cover (5), the wave-breaking wall (3), the reservoir slope anti-seepage structure (1.2) and the reservoir bottom anti-seepage structure (1.1) form a closed structure; The reservoir inlet / outlet (2) is provided below one side of the reservoir bottom anti-seepage structure (1.1) and is in closed communication with the entire reservoir anti-seepage reservoir body; the upper equipment facilities (6) are arranged on the top cover (5); The upper equipment and facilities (6) include buildings and structures of the pumped-storage power station, and also include a solar power station (7) planned and constructed synchronously with the pumped-storage power station; The solar power station (7) is a photovoltaic power station or a solar thermal power station, which is operated in conjunction with the pumped storage power station. Its power generation is preferentially used to meet the production and living electricity needs of the pumped storage power station, including the pumping of water by the units. The excess power is then supplied to the power grid using the delivery system (9) of the pumped storage power station. When the solar power station (7) is a photovoltaic power station, photovoltaic modules of the photovoltaic power station are laid on the surface of the solar power station foundation of the top cover (5); when the solar power station (7) is a solar thermal power station, a solar thermal power station mirror is laid on the surface of the solar power station foundation of the top cover (5); A water pump (10) is arranged above the reservoir bottom anti-seepage structure (1.1) and near the gate well of the reservoir inlet / outlet (2); the water outlet end of the water pump (10) is connected to one end of a connecting pipe (11); the other end of the connecting pipe (11) passes through the top cover (5) and is connected to a water diversion pipeline with a nozzle arranged above the photovoltaic module of the photovoltaic power station or the mirror of the solar thermal power station; The solar power station foundation has a confluence surface, and a centralized sedimentation and filtration pool (12) is arranged on the confluence side of the solar power station foundation and outside the top cover (5); the centralized sedimentation and filtration pool (12) is connected to the reservoir inlet and outlet pipes in front of the reservoir inlet / outlet (2) through pipes; When the photovoltaic components of the photovoltaic power station or the mirror surface of the solar thermal power station of the solar power station (7) need to be cleaned and cooled, water is pumped from the reservoir basin of the pumped storage power station through the water pump (10) and the connecting pipe (11), and is directly sprayed onto the photovoltaic components of the photovoltaic power station or the mirror surface of the solar thermal power station through the nozzle of the water diversion pipeline; then, the sprayed water is converged into the centralized sedimentation and filtration pool (12), and after sedimentation and filtration in the centralized sedimentation and filtration pool (12), it flows back to the interior of the whole reservoir anti-seepage reservoir body through the pipeline.

2. A pumped storage power station full reservoir anti-seepage reservoir according to claim 1, characterized in that: No trash rack is provided in front of the reservoir inlet / outlet (2).

3. A pumped storage power station full reservoir anti-seepage reservoir according to claim 1, characterized in that: The wave-breaking wall (3) is a reinforced concrete structure.

4. A pumped storage power station full reservoir anti-seepage reservoir according to claim 1, characterized in that: The number of the columns (4) is no less than 3, and they are made of reinforced concrete or steel structure. The depth of the bottom of the columns is not less than 2m into the stable foundation surface of the reservoir basin. The columns are evenly arranged in the reservoir and do not affect the normal operation of the reservoir inlet / outlet (2).

5. A pumped storage power station full reservoir anti-seepage reservoir according to claim 1, characterized in that: The top cover (5) is a reinforced concrete slab-beam structure, and a movable cover plate (8) is provided at a corresponding position of the gate well of the reservoir inlet / outlet (2), and the movable cover plate (8) is only opened when the reservoir is inspected or repaired.

Images