CN117927407A - Water pumping energy storage system and method based on deep well and ball cavity - Google Patents
Water pumping energy storage system and method based on deep well and ball cavity Download PDFInfo
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- CN117927407A CN117927407A CN202410094248.2A CN202410094248A CN117927407A CN 117927407 A CN117927407 A CN 117927407A CN 202410094248 A CN202410094248 A CN 202410094248A CN 117927407 A CN117927407 A CN 117927407A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 238000004146 energy storage Methods 0.000 title claims abstract description 42
- 238000005086 pumping Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 239000008239 natural water Substances 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims description 12
- 239000011150 reinforced concrete Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention provides a pumping energy storage system and a pumping energy storage method based on a deep well and a ball cavity, which belong to the technical field of mechanical energy storage and comprise a deep well, a ball cavity, an overground reservoir, a water pump turbine, a protection device of the water pump turbine, a water pipe, a channel, a gas pipe, a gate, a control center, a cable, a measurement and control cable and the like; by the application of the underground spherical cavity, an underground factory building is saved, the construction cost is greatly reduced, and the method can be modularized and distributed and is friendly to popularize; and is combined with natural water source, city landscape water and the like to realize comprehensive utilization. The invention has flexible site selection and is suitable for large-scale popularization in areas with concentrated new energy sources in China.
Description
Technical Field
The invention belongs to the technical field of mechanical energy storage, and particularly relates to a pumping energy storage system and method based on a deep well and a ball cavity.
Background
The physical energy storage technologies such as water pumping energy storage and compressed air energy storage have the advantages of safety, reliability, large-scale performance, environmental friendliness, no pollution, good economical efficiency and the like, and the water pumping energy storage technology is mature and widely applied, so that the water pumping energy storage technology is a target of the large-scale energy storage technology. However, the water pumping and energy storage is severely dependent on natural resources such as terrains, water sources and the like and geographical conditions, not only enough water resources are needed, but also a large terrain fall is needed for building up the upstream and downstream water reservoirs, and the geographical resources capable of building the water pumping and energy storage in China are extremely limited, so that the site selection is difficult.
In the prior published patent schemes, various forms of pumping energy storage systems are proposed by utilizing abandoned mines. However, the site selection of the abandoned mine is limited, only the place with the abandoned mine can be selected, and the abandoned mine such as the coal mine is strictly controlled due to the safety and other problems; due to the problems of water leakage, soaking and the like, the underground construction of abandoned mines is difficult and the cost is high.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problems of insufficient available resources, difficult site selection and the like of the existing water pumping and energy storage system, the invention provides a water pumping and energy storage system and a method based on a deep well and a ball cavity, and the application of the underground ball cavity omits an underground factory building, so that the construction cost is greatly reduced, and the water pumping and energy storage system and the method can be modularized and distributed and are friendly to popularize; and is combined with natural water source, city landscape water and the like to realize comprehensive utilization. The invention is environment-friendly, the system is intrinsically safe and pollution-free, can be implemented in places such as urban roadsides, park corners and the like where deep wells can be drilled, has flexible site selection, is suitable for large-scale popularization in areas with concentrated new energy sources in China, and is also suitable for distributed application in urban areas with dense population and intense land.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A pumping energy storage system based on a deep well and a ball cavity comprises the deep well, the ball cavity, an overground reservoir, a water pump turbine, a water delivery pipeline, a channel, a gas delivery pipeline, a gate, a control center, a cable, a measurement and control cable and the like; the ball cavity is arranged at the bottom of the deep well, the water delivery pipeline is inserted into the bottom of the ball cavity and is communicated with the water pump turbine, and a gate is arranged at the inlet end of the water pump turbine; the water pump turbine is communicated with the bottom of the ball cavity through a water delivery pipeline, and is communicated with the bottom of the ground reservoir through a deep well and a channel, and a gate is arranged at the upper end of the water delivery pipeline; the gas pipeline is arranged at the top of the ball cavity and is communicated with the atmosphere on the ground; the control center is arranged on the ground and connected with the water pump turbine through a cable and a measurement and control cable, and is used for controlling the opening and closing of the gate, the starting and stopping of the water pumping and energy storage system and the starting and stopping of the water pump turbine.
Preferably, the deep well is a vertical well or an inclined well.
Preferably, the deep well is a manually excavated or abandoned mine.
Preferably, the caliber and depth of the deep well are selected according to the energy storage energy and the power, and are matched with the capacity of an above-ground reservoir; the volume of the ball cavity is selected according to the energy storage energy and the power, and is matched with the capacity of an overground reservoir.
Preferably, the ball cavity is a downhole water storage container and is made of reinforced concrete or steel.
Preferably, the spherical cavity is an ellipsoidal cavity; the above-ground reservoir is a natural water source, an artificial reservoir, a barrier lake or an urban landscape pool.
Preferably, the power of the water pump turbine is matched with the energy storage energy and the power of the system, and a protection device is arranged outside the water pump turbine and has the dual functions of protecting and radiating the water pump turbine.
Preferably, the water pump turbine is arranged at the top of the ball cavity.
Preferably, the deep well and the ball cavity are filled with water, and are communicated with the upper reservoir through the channel.
Preferably, the deep well neutralization ball cavity can be arranged below the upper reservoir, and the ball cavity is directly communicated with the upper reservoir through the deep well. The invention provides a water pumping and energy storage method based on a deep well and a ball cavity, which comprises the following working principles and processes:
In the initial state, no water exists in the ball cavity, the gate is closed, the ball cavity is communicated with the ground atmosphere through the gas transmission pipeline, and the air pressure in the ball cavity is ensured to be communicated with the atmosphere;
When electricity consumption peaks, a power grid or a user needs electric energy, the control center firstly opens a gate, then starts a water pump and a water turbine, water in an overground reservoir flows into the ball cavity and drives the water pump and the water turbine to generate electricity, and the electric energy is transmitted to the power grid or the user through a cable and the control center; when the water level in the ball cavity rises to the first set water level, the gate is closed, the water pump and the water turbine are stopped, and the water pumping and energy storage system completes power generation.
When electricity is needed to be stored in a valley, a power grid or a user, the control center opens a gate, starts a water pump and a water turbine, pumps water in the ball cavity into an overground reservoir by using the electricity, and stores energy in a gravitational potential energy mode of the water; when the water level in the ball cavity is reduced to the second set water level, the gate is closed, the water pump turbine is shut down, and the water pumping and energy storage system completes charging.
The invention has the beneficial effects that:
The invention has the characteristics of small occupied area, distributed construction and the like, and by applying the underground spherical cavity, the underground factory building is saved, the construction cost is greatly reduced, and the invention can be modularized and distributed friendly popularization; and the system is combined with natural water sources, urban landscape water and the like to realize comprehensive utilization, so that the construction cost is further reduced, and the system is environment-friendly, intrinsically safe, pollution-free, flexible in site selection and the like. The invention can also be implemented in places such as city roadsides, park corners and the like where deep wells can be drilled, has flexible site selection, is suitable for large-scale popularization in areas with concentrated new energy sources in China, and is also suitable for distributed application in urban areas with dense population and intense land.
Drawings
FIG. 1 is a schematic diagram of a deep well and ball cavity based pumped storage system of the present invention;
FIG. 2 is a schematic diagram of an elliptical cavity pumped storage system;
Fig. 3 is a schematic view of the structure of an inclined shaft.
Reference numerals illustrate: 1-deep well, 2-ball cavity, 3-overground reservoir, 4-protector, 5-water pump turbine, 6-control center, 7-water pipe, 8-gas pipe, 9-cable, 10-measurement and control cable, 11-ellipsoid cavity, 12-inclined shaft, 13-channel, 14-gate.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, to which the present invention is further described by way of examples.
As shown in fig. 1, the pumping energy storage system based on the deep well and the ball cavity comprises a deep well 1, a ball cavity 2 under the ground, an overground reservoir 3, a water pump turbine 5, a protection device 4 of the water pump turbine, a water pipe 7, a gas pipe 8, a gate 14, a control center 6, a cable 9, a measurement and control cable 10 and the like. The deep well 1 can be a vertical well or an inclined well 12; the well can be an artificial deep well which is excavated manually or a abandoned well; the caliber and depth of the deep well 1 are optimized according to the stored energy and power and are matched with the capacity of the above-ground reservoir 3. The deep well and the ball cavity 2 are filled with water and are communicated with the above-ground reservoir 3 through a channel 13.
The ball cavity 2 is an underground water storage container and is an underground reservoir of an energy storage system; the ball cavity 2 can be made of reinforced concrete or steel; the ball cavity 2 is arranged at the bottom of the deep well 1, and the volume of the ball cavity 2 is optimized according to the stored energy and power and is matched with the capacity of the above-ground reservoir 3. The water delivery pipeline 7 is inserted into the bottom of the ball cavity 2 and is communicated with the water pump turbine 5. The gas pipeline 8 is arranged at the top of the ball cavity 2 and is communicated with the atmosphere on the ground.
The above-ground reservoir 3 can be a natural water source such as a river, a lake and the like, or can be an artificial reservoir, a barrier lake, an urban landscape pool and the like.
The water pump turbine 5 is a core device for electromechanical conversion, is arranged at the top of the spherical cavity 2, has power matched with the energy storage energy and power of the system, is communicated with the bottom of the spherical cavity 2 and the bottom of the ground reservoir 3 through the deep well 1, the channel 13 and the water delivery pipeline 7, and is provided with a gate 14 at the upper end of the water delivery pipeline 7; the water pump turbine 5 is provided with the protection device 4, and has the dual functions of protecting and radiating the water pump turbine 5.
The control center 6 is arranged on the ground, is connected with the water pump turbine 5 through a cable 9 and a measurement and control cable 10, is used for controlling the start and stop of the energy storage system, the start and stop of the water pump turbine 5 and the like, and is a control center of the energy storage system.
The working principle and the working process of the invention are described as follows:
As shown in fig. 1, in the initial state, no water exists in the ball cavity 2, the gate 14 is closed, the ball cavity 2 is communicated with the ground atmosphere through the gas pipeline 8, and the air pressure in the ball cavity 2 is ensured to be communicated with the atmosphere.
When electricity consumption peaks, a power grid or a user needs electric energy, the control center 6 firstly opens the gate 14 and then starts the water pump turbine 5, water in the overground reservoir 3 flows into the ball cavity 2 through the channel 13, the deep well 1 and the gate 14 and drives the water pump turbine 5 to generate electricity, and the electric energy is transmitted to the power grid or the user through the cable 9 and the control center 6; when the water level in the ball cavity 2 rises to the first set water level, the gate 14 is closed, the water pump turbine 5 is shut down, and the energy storage system completes power generation.
When electricity is needed to be stored in a valley, a power grid or a user, the control center 6 opens the gate 14, starts the pump water turbine 5, pumps water in the ball cavity 2 into the ground reservoir 3 by using the electricity, and stores energy in a gravitational potential energy mode of the water; when the water level in the ball cavity 2 drops to the second set water level, the gate 14 is closed, the water pump turbine 5 is shut down, and the energy storage system finishes charging.
In some preferred embodiments, as shown in fig. 2, an ellipsoidal cavity 11 can be used in order to increase the volume of the spherical cavity 2 or as desired by geologic conditions.
In some preferred embodiments, as shown in fig. 2, the deep well 1 and the ellipsoidal cavity 11 can be disposed below the above-ground reservoir 3, and the ellipsoidal cavity 11 can be in direct communication with the above-ground reservoir 3 via the deep well 1.
In some preferred embodiments, the deep well 1 may also be an inclined well 12, as shown in fig. 3.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (10)
1. The pumping energy storage system based on the deep well and the ball cavity is characterized by comprising the deep well, the ball cavity, a base, an overground reservoir, a water pump turbine, a water pipe, a channel, a gas pipe, a control center, a cable and a measurement and control cable; the ball cavity is arranged at the bottom of the deep well through the base, and the water conveying pipeline is inserted into the bottom of the ball cavity so as to be communicated with the ground reservoir through the deep well; the water pump turbine is communicated with the bottom of the ball cavity through a water delivery pipeline and is communicated with the ground reservoir through a deep well; the gas pipeline is arranged at the top of the ball cavity and is communicated with the atmosphere on the ground; the control center is arranged on the ground and connected with the water pump turbine through a cable and a measurement and control cable, and is used for controlling the opening and closing of the gate, the starting and stopping of the water pumping and energy storage system and the starting and stopping of the water pump turbine.
2. The pumped storage system of claim 1, wherein the deep well is a vertical well or an inclined well.
3. The pumped storage system of claim 1, wherein the deep well is a manually excavated or abandoned mine.
4. The pumped storage system based on a deep well and a spherical cavity according to claim 1, wherein the caliber and depth of the deep well are selected according to energy storage and power and are matched with the capacity of an above-ground reservoir; the volume of the ball cavity is selected according to the energy storage energy and the power, and is matched with the capacity of an overground reservoir.
5. The water pumping and energy storage system based on the deep well and the ball cavity as claimed in claim 1, wherein the ball cavity is a downhole water storage container and is made of reinforced concrete or steel;
The above-ground reservoir is a natural water source, an artificial reservoir, a barrier lake or an urban landscape pool.
6. The water pumping and energy storing system based on the deep well and the ball cavity as claimed in claim 1, wherein the power and the lift of the water pump turbine are matched with the energy storage and the power of the system, and a protection device is arranged outside the water pump turbine, so that the water pump turbine has the dual functions of protection and heat dissipation.
7. The pumped storage system based on the deep well and the ball cavity as claimed in claim 1, wherein a wellhead of the deep well is provided with a wellhead plug, and the wellhead plug is made of reinforced concrete and is provided with a maintenance channel.
8. The pumped storage system based on a deep well and a ball cavity according to claim 1, wherein the water pump turbine is arranged in the sunk well at the lower part of the ball cavity when the sum of the inner diameter of the ball cavity and the height of the water pump turbine is more than 10 meters.
9. The pumped storage system of claim 1, wherein the pump turbine is disposed on top of the ball cavity.
10. A method of storing energy in a deep well and ball cavity based pumped storage system according to any one of claims 1 to 9, comprising:
In the initial state, no water exists in the ball cavity, the gate is closed, the ball cavity is communicated with the ground atmosphere through the gas transmission pipeline, and the air pressure in the ball cavity is ensured to be communicated with the atmosphere;
when electricity consumption peaks, a power grid or a user needs electric energy, the control center firstly opens a gate, then starts a water pump and a water turbine, water in an overground reservoir flows into the ball cavity and drives the water pump and the water turbine to generate electricity, and the electric energy is transmitted to the power grid or the user through a cable and the control center; when the water level in the ball cavity rises to a first set height, the gate is closed, the water pump and the water turbine are shut down, and the water pumping and energy storage system completes power generation;
when electricity is needed to be stored in a valley, a power grid or a user, the control center opens a gate, starts a pump water turbine, pumps water in the ball cavity into an overground reservoir by using the electricity, and stores energy in a gravitational potential energy mode of the water; when the water level in the ball cavity is reduced to a second set height, the gate is closed, the water pump and the water turbine are stopped, and the water pumping and energy storage system is charged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410094248.2A CN117927407A (en) | 2024-01-23 | 2024-01-23 | Water pumping energy storage system and method based on deep well and ball cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410094248.2A CN117927407A (en) | 2024-01-23 | 2024-01-23 | Water pumping energy storage system and method based on deep well and ball cavity |
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| Publication Number | Publication Date |
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| CN117927407A true CN117927407A (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410094248.2A Pending CN117927407A (en) | 2024-01-23 | 2024-01-23 | Water pumping energy storage system and method based on deep well and ball cavity |
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| CN (1) | CN117927407A (en) |
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- 2024-01-23 CN CN202410094248.2A patent/CN117927407A/en active Pending
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