WO2024012563A1

WO2024012563A1 - Shaft pumped-storage power plant having two stations and three reservoirs

Info

Publication number: WO2024012563A1
Application number: PCT/CN2023/107431
Authority: WO
Inventors: 黄祖华; 周航锋; 欧荣霖; 黄光领; 梁容辉; 廖伟刚; 吴凯
Original assignee: 广西川昆新能源科技有限公司
Priority date: 2022-07-15
Filing date: 2023-07-14
Publication date: 2024-01-18
Also published as: AU2023204678A1; CN218712727U

Abstract

Disclosed in the present invention is a shaft pumped-storage power plant having two stations and three reservoirs, comprising: an upper reservoir, arranged at a headwater elevation, the lower end of the upper reservoir being communicated with a first pressure shaft; a first power plant unit, arranged on the ground and communicated with the first pressure shaft, a drainage end of the first power plant unit being connected into a non-pressure tailwater channel, and the non-pressure tailwater channel joining a river channel; a cavern digging middle reservoir, arranged in a mountain body and communicated with the non-pressure tailwater channel; a second power plant unit, arranged at the upper end of a lower reservoir and communicated with a second pressure shaft; the lower reservoir, arranged underground and communicated with a drainage end of the second power plant unit; and a gravel treatment plant, which divides the river channel into two sections, the two sections of the river channel being communicated by means of a traffic road on a riverside waterway. According to the present utility model, two stations and three reservoirs are arranged, and upstream and downstream water and soil resources and underground soil resources are comprehensively utilized, so that the reservoir capacity of the power plant is expanded, the flexibility of clean energy development is improved, water can be stored while power generation is achieved, flood disasters can be effectively relieved and avoided, abandoned water is recycled, and shipping and navigation in dry seasons are facilitated.

Description

A two-station and three-reservoir shaft type pumped storage power station

Technical field

The present invention relates to the technical field of pumped-storage power stations, specifically a two-station and three-tank shaft type pumped-storage power station.

Background technique

Pumped storage power stations, with their flexible, fast, economical and reliable characteristics, have become one of the effective and economical means to solve the above problems. Pumped storage power stations pump water to upstream reservoirs when the grid is at low load, converting electrical energy into potential energy and store it; when the grid is at peak load, they release water to generate electricity and provide electrical energy to the grid. Therefore, the pumped storage power station can convert low-value electric energy during the low load period of the power grid into high-value electric energy during the peak load period, with significant static benefits; it can provide peak shaving, valley filling, frequency modulation, phase modulation, etc. to the power grid at a lower cost. Functions such as accident backup and fast load tracking have good dynamic benefits.

Traditional pumped storage power stations fail to utilize underground land resources, have limited ability to allocate water resources, and have low storage capacity. In order to solve the above technical problems, the utility model proposed a two-station and three-storage shaft type pumped storage power station.

Technical solutions

In order to solve the above technical problems, the technical solution provided by the present invention is a two-station and three-tank shaft type pumped storage power station:

A two-station and three-reservoir shaft type pumped storage power station, including

The upper reservoir is located at the upstream water level, and its lower end is connected with the first pressurized shaft;

The first power station unit is located on the ground and is connected to the first pressurized shaft. The drainage end of the first power station unit is connected to the unpressurized tailrace channel, and the unpressurized tailrace channel merges into the river;

A dug-in central reservoir, which is located in the mountain and connected to the unpressurized tailrace channel;

The second power station unit is located at the upper end of the lower reservoir and is connected to the second pressurized shaft; the lower reservoir is located underground and is connected to the drainage end of the second power station unit;

Sand and gravel processing plant, the sand and gravel processing plant cuts the river into two ends, and the two sections of the river are connected through the traffic roads on the riverside waterway.

As an improvement, the depth of the second pressurized shaft is not less than 700 meters; the first power station unit is a 600,000 kW unit; and the second power station unit is a 4 million kW unit.

As an improvement, there are several water storage caves arranged in an array in both the middle and lower reservoirs of the tunnel.

As an improvement, there are power transmission shafts and lifting traffic ventilation shafts between the sand and gravel processing plant and the second power station unit.

As an improvement, a ventilation shaft is provided on one side of the lower warehouse.

As an improvement, a discounted tape transportation traffic hole is provided between the hanging object transportation ventilation shaft and the hanging object ventilation shaft, and the bend of each discounted tape transportation traffic hole is connected to the hanging object transportation ventilation shaft or the ventilation hanging object shaft. .

As an improvement, the river channel between the sand and gravel processing plant and the unpressurized tailrace channel is an abandoned stone pit port.

beneficial effects

The advantages of the present invention compared with the existing technology are: the present invention sets up two stations and three reservoirs, comprehensively utilizes upstream and downstream water and soil resources and underground land resources, expands the storage capacity of the power station, improves the flexibility of developing clean energy, and can realize power generation while also storing electricity. It can effectively reduce and avoid flood disasters. It also recovers discarded water and facilitates shipping and navigation during low water periods.

Description of drawings

Figure 1 is a schematic structural diagram of a two-station and three-tank shaft type pumped storage power station of the present invention.

As shown in the figure: 1. Upper reservoir; 2. First pressurized shaft; 3. First power station unit; 4. Unpressurized tailrace; 5. Hole-dug middle reservoir; 6. Second power station unit; 7. Lower reservoir ; 8. The second pressurized shaft; 9. Sand and gravel processing plant; 10. Power transmission shaft; 11. Ventilation shaft for hanging objects transportation; 12. Ventilation shaft for hanging objects; 13. Discounted tape transportation traffic hole.

Embodiments of the invention

To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are Some embodiments of the present invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals from the beginning represent the same or similar elements or elements with the same or similar functions. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer", "vertical", The orientations or positional relationships indicated by "circumferential", "radial", "axial", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the following. It is intended that devices or elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of the present invention, "first feature" and "second feature" may include one or more of these features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined as “first” and “second” may explicitly or implicitly include one or more of these features.

The following is a further detailed description of the two-station and three-tank shaft pumped storage power station of the present invention in conjunction with the accompanying drawings.

With reference to the accompanying drawings, Figure 1 shows a two-station and three-storage shaft type pumped storage power station, including

The upper reservoir 1 is located at the upstream water level, and its lower end is connected with the first pressurized shaft 2;

The first power station unit 3 is located on the ground and is connected to the first pressurized shaft 2. The drainage end of the first power station unit 3 is connected to the unpressurized tailrace 4, and the unpressurized tailrace 4 merges into the river. ;

The dug-out middle reservoir 5 is located in the mountain and connected to the unpressurized tailrace channel 4;

The second power station unit 6 is located at the upper end of the lower reservoir 7 and is connected to the second pressurized shaft 8; the lower reservoir 7 is located underground and is connected to the drainage end of the second power station unit 6;

The sand and gravel processing plant 9 cuts the river into two ends, and the two sections of the river are connected by traffic roads on the riverside waterway.

In this embodiment, as shown in the figure, the depth of the second pressurized shaft is not less than 700 meters; the first power station unit 3 is a 600,000 kW unit; the second power station unit 6 is a 4 million kW unit.

In this embodiment, as shown in the figure, there are several water storage caves arranged in an array in both the middle cave 5 and the lower cave 7.

In this embodiment, as shown in the figure, the sand and gravel processing plant 9 and the second power station unit 6 are provided with a power transmission shaft 10 and a lifting traffic ventilation shaft 11.

In this embodiment, as shown in the figure, a ventilation shaft 12 is provided on one side of the lower warehouse 7.

In this embodiment, as shown in the figure, a folded tape transportation traffic hole 13 is provided between the hanging object transportation ventilation shaft 11 and the hanging object ventilation shaft 12. The bend of each discounted tape transportation traffic hole 13 is in contact with the hanging object transportation The ventilation shaft 11 or the ventilation shaft 12 are connected.

In this embodiment, as shown in the figure, the river channel between the sand and gravel processing plant 9 and the unpressurized tailrace channel 4 is an abandoned stone pit port.

Working principle of the present invention: This invention applies the concept of two stations and three reservoirs for the first time in the pumped storage power station project. The underground cavern of the pumped storage power station makes full use of underground land resources and underground factory buildings to expand storage capacity and installed capacity of the power station, making the development of clean energy efficiency break through the traditional construction method of pumped storage power stations; using two stations, "ground station" and "underground station" storage The pumped water power plant of the energy power station has three reservoirs: "upper reservoir, middle reservoir, and lower reservoir", which can facilitate water transfer and replenishment, and improve the flexibility of developing clean energy.

Among them, the natural river channel is used as the upper reservoir, and the lower reservoir is an underground cavern. Cooperating with the ship lock to put water into the underground cavern during the high water season, it can not only complete power generation, but also store water, which not only avoids flood disasters, but also recovers discarded water. It is to recover energy; during the dry season, the water in the underground caverns is pumped back to the upper reservoir (natural river, etc.) for replenishment, which can facilitate shipping and navigation during the dry season;

At sites suitable for the construction of pumped-storage power stations, the installed capacity is more than twice that of the traditional model, and the reservoir capacity is more than twice that of the traditional model. There are already economic benefits when selling or using stone quarried in caves for project construction. After the pumped storage power station is built, the storage capacity of the lower reservoir is also increasing due to the progress of tunnel mining, so the energy stored will only increase. It far exceeds the layout method of traditional pumped storage power station projects.

The present invention and its embodiments have been described above. This description is not limiting. What is shown in the drawings is only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person of ordinary skill in the art is inspired by the invention and without departing from the spirit of the invention, can devise structural methods and embodiments similar to the technical solution without inventiveness, they shall all fall within the protection scope of the invention.

Claims

A two-station and three-silo shaft type pumped storage power station, characterized by: including an upper reservoir (1), which is located at the upstream water level, and its lower end is connected with the first pressurized shaft (2); The first power station unit (3) is located on the ground and connected to the first pressurized shaft (2). The drainage end of the first power station unit (3) is connected to the unpressurized tail drain. (4), the unpressurized tailrace channel (4) merges into the river; the dug-out middle reservoir (5) is located in the mountain and connected with the unpressurized tailrace channel (4); The second power station unit (6) is located at the upper end of the lower warehouse (7) and is connected to the second pressurized shaft (8); the lower warehouse (7) is located underground, And connected to the drainage end of the second power station unit (6); a sand and gravel processing plant (9). The sand and gravel processing plant (9) cuts the river into two ends, and the two sections of the river are connected through the traffic roads on the riverside waterway. Pass.
A two-station and three-silo shaft type pumped storage power station according to claim 1, characterized in that: the depth of the second pressurized shaft is not less than 700 meters; the first power station unit (3) is six One hundred thousand kw unit; the second power station unit (6) is a four million kw unit.
A two-station and three-silo shaft type pumped-storage power station according to claim 1, characterized in that: the tunnel-dug middle reservoir (5) and the lower reservoir (7) are equipped with several storage arrays arranged in an array. Water cave library.
A two-station and three-silo shaft pumped storage power station according to claim 1, characterized in that: a transmission shaft (10) is provided between the sand and gravel processing plant (9) and the second power station unit (6). Lifting traffic ventilation shaft (11).
A two-station and three-silo shaft type pumped-storage power station according to claim 4, characterized in that: a ventilation and lifting shaft (12) is provided on one side of the lower reservoir (7).
A two-station and three-silo shaft type pumped-storage power station according to claim 5, characterized in that: there is a discounted tape transportation traffic hole ( 13), the bend of each folded tape transportation traffic hole (13) is connected to a hanging object transportation ventilation shaft (11) or a ventilation hanging object shaft (12).
. A two-station and three-silo shaft type pumped-storage power station according to claim 1, characterized in that the river channel between the sand and gravel processing plant (9) and the unpressurized tailrace channel (4) is an abandoned stone pit port.