A layout mode of upper and lower reservoirs of a series pumped storage power station

Abstract

The application discloses a series type pumped storage power station upper and lower reservoir arrangement mode, comprising: selecting a terrain with a height difference, the bottoms of multiple upper reservoirs located at a high position of the terrain are connected through first communication pipes; the bottoms of multiple lower reservoirs located at a low position of the terrain are connected through second communication pipes; the bottom of one of the upper reservoirs and the bottom of one of the lower reservoirs are connected through a third communication pipe; and a power generation device is arranged at a position close to the bottom end of the third communication pipe. The upper and lower reservoir arrangement mode overcomes the restriction factors of the terrain conditions, sensitive factors and the size of the occupied land range on the arrangement of the pumped storage power station, improves the site selection flexibility of the pumped storage power station, reduces the engineering investment and construction difficulty, and is a more convenient and applicable upper and lower reservoir arrangement mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pumped storage power station, in particular to a series type pumped storage power station upper and lower reservoir arrangement. BACKGROUND

[0002] The instantaneous and unstable nature of solar and wind energy will have a huge impact on the power grid. In order to ensure power supply and grid stability, energy storage facilities will become a necessary facility in future new power systems. Common energy storage technologies include electrochemical energy storage, pumped storage, gravity energy storage, compressed air energy storage, etc. However, electrochemical energy storage is limited by battery technology research, has small capacity and cannot be used on a large scale. Compressed air energy storage is not mature in terms of cost, and the installed capacity is still small, which cannot meet the large-capacity energy storage requirements of large new energy bases. Pumped storage power stations have developed for many years and have high water head and large-capacity power station design and construction levels, so pumped storage power stations can be used as a stable and safe energy storage facility. However, the construction of pumped storage power stations requires specific topographic and geological conditions, and the primary goal is to select a topographic condition that meets the reservoir capacity requirements. The selection requirements are extremely harsh, and in order to meet the self-balancing requirements of the earthwork of a single reservoir, the reservoir cannot be excavated in a large way to increase the reservoir capacity, resulting in a large number of site selection constraints.

[0003] Therefore, how to improve the flexibility of pumped storage power station site selection will directly expand the application range of pumped storage power station site selection. Therefore, the present application proposes a series type pumped storage power station upper and lower reservoir arrangement to solve the above problems. SUMMARY

[0004] The main purpose of the present application is to provide a series type pumped storage power station upper and lower reservoir arrangement which can improve the flexibility of pumped storage power station site selection.

[0005] To achieve the above purpose, the present application provides a series type pumped storage power station upper and lower reservoir arrangement, comprising:

[0006] A topographic condition with a height difference is selected, the bottoms of a plurality of upper reservoirs located at a high position of the topographic condition are connected by first communication pipes, the bottoms of a plurality of lower reservoirs located at a low position of the topographic condition are connected by second communication pipes, the bottom of one of the upper reservoirs is connected to the bottom of one of the lower reservoirs by a third communication pipe, and a power generation device is arranged at a position close to the bottom end of the third communication pipe.

[0007] Further, the ends of the first communication pipes, the second communication pipes and the third communication pipes are respectively provided with a trash rack assembly, a plurality of through holes are formed in the trash rack assembly for water to pass through, and the ends of each of the first communication pipes, the second communication pipes and the third communication pipes are located in the trash rack assembly.

[0008] Further, the trash retaining assembly comprises a bottom plate, a first arc cover and a second arc cover, and the through holes are respectively arranged on the first arc cover and the second arc cover.

[0009] One end of the first arc cover and the second arc cover is overlapped to form a hemisphere, and the other end of the first arc cover and the second arc cover is rotatably connected to the bottom plate and can be rotated from inside to outside, and the inner side of the first arc cover and the second arc cover is respectively provided with a connecting seat, and an elastic member is arranged between the connecting seat and the bottom plate, and the elastic member is used for rotating the first arc cover and the second arc cover outwardly opened to rotate inwardly to reset and close.

[0010] Further, the bottom of the bottom plate is provided with a heightening support for lifting the distance between the bottom plate and the bottom of each reservoir.

[0011] Further, the third communication pipe is connected with the power generation equipment through the branch pipe.

[0012] Further, the third communication pipe and the branch pipe are respectively provided with on-off valves between two communication nodes of the third communication pipe and the branch pipe and the water inlet of the branch pipe, so as to control the on-off of the third communication pipe and the branch pipe at the position.

[0013] The beneficial effects of the present application are embodied in:

[0014] The upper and lower reservoir arrangement of the present application overcomes the constraints of topographic conditions, sensitive factors and land occupation range on the layout of pumped storage power stations, improves the site selection flexibility of pumped storage power stations, reduces the engineering investment and construction difficulty, and is a more convenient and applicable upper and lower reservoir arrangement. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The overall arrangement structure of the present application is shown in the figure;

[0016] Fig. 2 The connection schematic diagram of the third communication pipe and the power generation equipment in the present application is shown in the figure;

[0017] Fig. 3 The structure view of the trash retaining assembly in the present application is shown in the figure.

[0018] MARKED DESCRIPTION:

[0019] 1-upper reservoir, 2-lower reservoir, 3-first communication pipe, 4-second communication pipe, 5-third communication pipe, 51-branch pipe, 52-on-off valve, 6-power generation equipment, 7-trash retaining assembly, 71-through hole, 72-bottom plate, 73-first arc cover, 74-second arc cover, 75-connecting seat, 76-elastic member, 77-heightening support. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0021] In addition, "a plurality of" refers to two or more.

[0022] Referring to Figs. 1 to 3 .

[0023] The present application provides a series of pumped storage power station upper and lower reservoir arrangement, comprising:

[0024] Select the terrain with high difference, the bottom of a plurality of upper reservoirs 1 located at the high terrain is connected by the first communication pipe 3, the bottom of a plurality of lower reservoirs 2 located at the low terrain is connected by the second communication pipe 4, the bottom of one upper reservoir 1 is connected with the bottom of one lower reservoir 2 by the third communication pipe 5, and the power generation equipment 6 is arranged at the position close to the bottom end of the third communication pipe 5.

[0025] In the specific implementation, the power generation equipment 6 is a reversible hydraulic turbine set commonly used in the existing pumped storage power station. The bottoms of the plurality of upper reservoirs 1 are connected by the first communication pipe 3, and the bottoms of the plurality of lower reservoirs 2 are connected by the second communication pipe 4, so that the total reservoir capacity is expanded. When the pumped storage power station is in the pumping condition, the water in the lower reservoir 2 enters the upper reservoir 1 through the reversible hydraulic turbine set, and the water levels in the lower reservoirs 2 synchronously drop due to the connection between the bottoms of the lower reservoirs 2 by the second communication pipe 4. The water levels in the upper reservoirs 1 synchronously rise due to the connection between the bottoms of the upper reservoirs 1 by the first communication pipe 3. When the pumped storage power station is in the power generation condition, the water levels in the upper reservoirs 1 synchronously drop, and the water levels in the lower reservoirs 2 synchronously rise. The arrangement can fully solve the problem that a single reservoir cannot expand the reservoir capacity due to the influence of boundary conditions, can realize the connection of the depressions, gullies and water storage projects in a large area that meet the reservoir arrangement conditions, fully utilizes the terrain and geological conditions in the region, and improves the installed capacity of the pumped storage power station.

[0026] The upper and lower reservoir arrangement of the present application overcomes the constraints of the terrain conditions, sensitive factors and land area size on the arrangement of the pumped storage power station, improves the site selection flexibility of the pumped storage power station, reduces the engineering investment and construction difficulty, and is an upper and lower reservoir arrangement with stronger convenience and applicability.

[0027] Of course, the third communication pipe is also provided with a switch valve for preventing water flow, and the switch valve is not described here because its specific position, structure and the like are well known in the art.

[0028] In an embodiment, to prevent the end of the first communication pipe 3, the second communication pipe 4 and the third communication pipe 5 from being blocked, the following technical solution is adopted:

[0029] The end of the first communication pipe 3, the second communication pipe 4 and the third communication pipe 5 is provided with a trash blocking assembly 7, and a plurality of through holes 71 are formed in the trash blocking assembly 7 for water to pass through, and the end of each of the first communication pipe 3, the second communication pipe 4 and the third communication pipe 5 is located in the trash blocking assembly 7.

[0030] The trash blocking assembly 7 comprises a bottom plate 72, a first arc cover 73 and a second arc cover 74, the plurality of through holes 71 are formed in the first arc cover 73 and the second arc cover 74, the end of the first communication pipe 3, the second communication pipe 4 and the third communication pipe 5 passes through the corresponding bottom plate 72, one end of the first arc cover 73 and the second arc cover 74 is overlapped to form a hemispherical shape, the other end of the first arc cover 73 and the second arc cover 74 is rotatably connected to the bottom plate 72 and can be rotated from inside to outside, the inner side of the first arc cover 73 and the second arc cover 74 is provided with a connecting seat 75, and the connecting seat 75 and the bottom plate 72 are provided with an elastic member 76, and the elastic member 76 is used to rotate the first arc cover 73 and the second arc cover 74 outwardly opened inwardly to reset and close.

[0031] In a specific implementation, the design of the trash blocking assembly 7 can block the dry branches and weeds at the bottom of the reservoir from entering the trash blocking assembly 7, but since the through holes 71 are formed in the trash blocking assembly 7, part of the slender debris (such as weeds) can enter the trash blocking assembly 7 through the through holes 71, be sucked from one end of the communication pipe and be sprayed from the other end of the communication pipe, but since the shape of the debris sprayed from the other end of the communication pipe may change (such as from slender to clumpy), the debris will accumulate on the inner side of the arc cover, which will hinder the normal passage of water through the through holes 71. When the debris accumulated on the inner side of the arc cover is relatively large, part of the through holes 71 in the trash blocking assembly 7 is blocked, the water pressure in the trash blocking assembly 7 is high, one end of the first arc cover 73 and the second arc cover 74 is rotated outwardly to open, and the debris in the trash blocking assembly 7 is flushed out of the trash blocking assembly 7 under the action of water flow. When the communication pipe stops working, the first arc cover 73 and the second arc cover 74 are rotated inwardly to reset and close under the action of the elastic member 76.

[0032] Such a design not only can prevent larger debris from entering the communication pipe, but also can discharge the debris entering the trash blocking assembly from the trash blocking assembly, which is a relatively ingenious design.

[0033] Preferably, the elastic member can be selected from a spring, an elastic rubber band or any elastic component.

[0034] In an embodiment, the bottom of the bottom plate 72 is provided with a raised support 77 for raising the distance between the bottom plate 72 and the bottom of each reservoir. In this way, the increase in the thickness of the silt at the bottom of the reservoir can be avoided, and the bottom plate and the trash arresting assembly can be covered, thus avoiding the difficulty in water discharge in the later stage.

[0035] In an embodiment, a branch pipe 51 is connected in parallel above the third communicating pipe 5 at the position of each power generation device 6, and the third communicating pipe 5 is connected with the power generation device 6 through the branch pipe 51; a switch valve 52 is arranged between the two communicating nodes of the third communicating pipe 5 and the branch pipe 51 on the third communicating pipe 5, for controlling the opening and closing of the third communicating pipe 5 at the position.

[0036] In the specific implementation, since each communicating pipe is located at the bottom of each reservoir, the mud will be mixed in the water when pumping and discharging water. In the idle state, the mud in the third communicating pipe 5 will deposit at the bottom of the third communicating pipe 5. Since the power generation device 6 is arranged close to the bottom of the third communicating pipe 5, the deposited mud will endanger the power generation device 6. By arranging the branch pipe 51, since the height of the branch pipe 51 is higher than that of the third communicating pipe 5 at the corresponding position, the deposited mud will deposit in the third communicating pipe 5, and will not endanger the power generation device 6.

[0037] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A layout of upper and lower reservoirs of a series pumped storage power station, characterized in that, The utility model relates to a kind of cascade reservoirs, comprising: Select topography with high difference, the bottom of multiple upper reservoirs (1) located at the high of topography is connected by first communication pipe (3);The bottom of multiple lower reservoirs (2) located at the low of topography is connected by second communication pipe (4);The bottom of one of upper reservoirs (1) is connected with the bottom of one of lower reservoirs (2) by third communication pipe (5);Power generation equipment (6) is arranged at the position close to bottom end of third communication pipe (5); End of the first communication pipe (3), the second communication pipe (4) and the third communication pipe (5) is respectively provided with trash rack assembly (7), a plurality of through holes (71) are formed in the trash rack assembly (7) for water passing, and the end of each first communication pipe (3), second communication pipe (4) and third communication pipe (5) is located in the trash rack assembly (7) respectively; The trash rack assembly (7) includes bottom plate (72), first arc cover (73) and second arc cover (74), and the through hole (71) is formed in the first arc cover (73) and the second arc cover (74) respectively; One end of the first arc cover (73) and the second arc cover (74) is overlapped to form a hemisphere, the other end of the first arc cover (73) and the second arc cover (74) is rotatably connected to the bottom plate (72) and can be rotated from inside to outside, the inner side of the first arc cover (73) and the second arc cover (74) is respectively provided with connecting seat (75), and elastic member (76) is arranged between the connecting seat (75) and the bottom plate (72), and the elastic member (76) is used to rotate the first arc cover (73) and the second arc cover (74) outwardly opened inwardly, so as to reset and close.

2. The arrangement of the upper and lower reservoirs of the series pumped storage power station according to claim 1, characterized in that, The bottom of the bottom plate (72) is provided with elevated support (77), for lifting the distance between the bottom plate (72) and the bottom of each reservoir.

3. The arrangement of the upper and lower reservoirs of the series pumped storage power station according to claim 2, characterized in that, The third communication pipe (5) is connected with the power generation equipment (6) through the branch pipe (51) corresponding to the position of the power generation equipment (6) above.

4. The arrangement of the upper and lower reservoirs of the series pumped storage power station according to claim 3, characterized in that, Through-on valve (52) is arranged between the two communication nodes of the third communication pipe (5) and branch pipe (51) and the water inlet of the branch pipe (51) respectively, for controlling the on-off of the third communication pipe (5) and the branch pipe (51) at the position.

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