CN117248508A - Water pumping energy storage power station based on self-excavating underground special water storage space - Google Patents
Water pumping energy storage power station based on self-excavating underground special water storage space Download PDFInfo
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- CN117248508A CN117248508A CN202311468228.9A CN202311468228A CN117248508A CN 117248508 A CN117248508 A CN 117248508A CN 202311468228 A CN202311468228 A CN 202311468228A CN 117248508 A CN117248508 A CN 117248508A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 232
- 238000004146 energy storage Methods 0.000 title claims abstract description 44
- 238000005086 pumping Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 29
- 238000010248 power generation Methods 0.000 claims description 24
- 239000002349 well water Substances 0.000 claims description 20
- 235000020681 well water Nutrition 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000003657 drainage water Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 239000003673 groundwater Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 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
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000009364 mariculture Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a water pumping and energy storage power station based on a self-excavating underground special water storage space. The energy storage power station can be selectively positioned near various water source sites; the excavation depth and the water storage roadway group volume can be determined according to the requirements and the stratum structure characteristics, the limit of existing facilities such as abandoned mines on water sources, water level drops and water storage volumes is broken through, the on-demand design of the underground water pumping and energy storage power station can be truly realized, and the method has remarkable economical efficiency, reliability, stability and high efficiency.
Description
Technical Field
The invention relates to a water pumping and energy storage power station based on a self-excavating underground special water storage space, and belongs to the technical field of electric energy storage.
Background
The green low-carbon conversion steps of the energy sources in China are continuously accelerated, the duty ratio of new energy sources such as wind energy, solar energy and the like in an energy system is continuously improved, the installed quantity of the new energy sources is increasingly improved, and the energy source structure in China is continuously adjusted and optimized. However, since the new energy power generation is different from the traditional thermal power, the configuration of the energy storage power station is particularly necessary when a large amount of new energy power stations are built in the future. Firstly, the new energy power supply process has volatility and intermittence, but the power system needs to keep the real-time balance of the generated output (power) and the power load (efficiency), and the new energy is difficult to meet the requirement. Secondly, excessive new energy power generation can cause the pressure bearing of the absorption end, and the phenomena of wind and light abandoning are caused. And the inertia of new energy power generation is small, and the frequency modulation capability is poor. The construction of energy storage power stations can solve the above problems. Besides, the energy storage power station can be built to cope with peak power supply, so that the investment and expenditure of a power grid can be saved, the fluctuation of electricity loads of residents and third industries can be dealt with, the peak-valley electricity price difference is improved, the blockage of the power grid is relieved at the power grid side, the emergency of accidents is avoided, the capacity expansion and upgrading of power transmission and distribution equipment are delayed, and the like.
Compared with electrochemical energy storage, the pumped storage technology is the energy storage technology which is the most mature in technology, the best in economic benefit, the most flexible, the highest in safety, the longest in service life, the least in environmental pollution and the most widely applied in the world currently. However, the existing pumped-storage systems still have a number of unavoidable drawbacks: the main flow ground pumped storage system needs to store water in an upstream reservoir and a downstream reservoir, and a dam is required to be built for building the reservoir, and the dam can have negative influence on an ecological system. The power station is required to be selected in places with rich water resources and large fall of upstream and downstream water reservoirs, so that the development of the ground water pumping and energy storage power station is more limited. The pumped storage system based on the existing underground facilities such as abandoned mines utilizes the height difference formed by the underground facilities such as abandoned mines and ground water source areas to pump water and store energy, so that the damage of ground pumped storage power stations to ecological environment is avoided, and some defects still exist. Firstly, the addresses of abandoned mines are generally in the north of China where coal resources are enriched, and under drought climates, it is difficult to ensure that water source sites with enough water resources exist near the abandoned mines; secondly, the depth of the abandoned mine is fixed, and the larger the water level fall is, the better the power generation by utilizing the gravitational potential energy of water is theoretically required, if the depth of the abandoned mine is shallower, the economical efficiency of the power station cannot be ensured; thirdly, the drainage place of the existing pumped storage system is a water source place, and the drained water cannot be sent to a required industrial department; in addition, the abandoned mine cannot utilize the space of the underground goaf to store water, and the space for storing water needs to be additionally excavated, so that the cost is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pumping energy storage power station based on a self-excavating underground special water storage space, wherein the energy storage power station can be selectively positioned near various water source sites; the excavation depth and the water storage roadway group volume can be determined according to the requirements and the stratum structure characteristics, the limit of existing facilities such as abandoned mines on water sources, water level drops and water storage volumes is broken through, the on-demand design of the underground water pumping and energy storage power station can be truly realized, and the method has remarkable economical efficiency, reliability, stability and high efficiency.
In order to solve the problems, the specific technical scheme of the invention is as follows: the construction mode of the water pumping and energy storage power station is that the water pumping and energy storage power station self-excavates the underground special water storage space, the water pumping and energy storage power station has a water level drop, and the upstream of the water pumping and energy storage power station is positioned near a water source area; a main well is arranged between the upstream and the downstream, the upper end of the main well is communicated with a water source through a diversion open channel, and a diversion control gate is arranged at the upper end of the main well; the lower end of the main well is communicated with the water storage roadway group; the middle part of the main well is provided with a water turbine unit, the outer side of the water turbine unit is provided with a drainage tunnel, the lower end of the drainage tunnel is communicated with the main well at the lower end of the water turbine unit through a drainage control gate, and the lower end of the drainage tunnel is communicated with the main well at the upper end of the water turbine unit; a water pump unit, a power generation gate and a drainage check valve are arranged between the lower end of the main well and the water storage roadway group, wherein the power generation gate and the drainage check valve form a closed space at the outlet of the main well, and when the power generation gate is opened, water discharged from the bottom of the main well is discharged from the opening of the power generation gate to the water storage roadway group; the water pump unit is positioned outside the water drainage check valve, when the power generation gate is closed and the water pump unit is opened, water discharged into the water storage roadway group is input to the bottom of the main well through the water drainage check valve and is conveyed upwards to a water source area.
At least one auxiliary well is arranged on the drainage water storage roadway group, an auxiliary well water pump unit is arranged at the bottom of the auxiliary well, and the top of the auxiliary well is communicated with the upstream ground; the bottom of the auxiliary well water pump drainage pipe is connected with the auxiliary well water pump unit, and the upper end of the auxiliary well water pump drainage pipe extends out of the upstream surface along the pipe wall of the auxiliary well and is led to an upstream drainage place or a plurality of upstream water source demand places.
And the water storage roadway group is provided with auxiliary wells, and the auxiliary wells are communicated with downstream drainage places or a plurality of downstream water sources in a required way through valves.
The water storage roadway group is positioned in the horizontal direction, and the height of the water storage roadway group and the upstream fall accords with the technical requirements of the water turbine unit; and the water storage roadway group consists of a plurality of roadways which are distributed horizontally and longitudinally in the same horizontal plane.
The water turbine assembly is installed in the main well or in a dedicated passage communicating with the main well.
The control method of the water pumping energy storage power station is that when electricity price is valley value, the water pump unit is started, and water in the underground water storage roadway group is conveyed to a water source place through the main well, the drainage roadway and the drainage control valve by the drainage check valve; and/or starting a secondary well water pump unit, and conveying water of the underground water storage roadway group to an upstream drainage place through a secondary well water pump drainage pipe; when electricity price is peak, the power generation gate is opened, water in the water source area drives the water turbine set in the main well to generate power under the action of gravity through the diversion open channel and the diversion control gate, and the water is temporarily stored in the underground water storage roadway group.
Compared with the prior art, the water pumping energy storage power station based on the self-excavating underground special water storage space has the following beneficial technical effects:
1. because the underground water pumping and energy storage power station is a special water storage space for self-digging, the site selection space is less limited, and the underground water pumping and energy storage power station can be selectively positioned near various water source areas, such as rivers, oceans, lakes, reservoirs and the like, the problems of ecological environment damage, limited site selection space and the like caused by building upstream and downstream water reservoirs of the traditional ground water pumping and energy storage power station are solved;
2. the energy storage power station drainage land can be a water source land and can also be an industrial department requiring water, such as mariculture, factories, agricultural irrigation and the like, so that the discharged water can be fully utilized and a certain economic benefit can be generated;
3. the construction mode of self-excavating can also determine the excavation depth and the volume of the water storage roadway group according to the requirements and the structural characteristics of stratum, breaks through the limitations of the existing facilities such as abandoned mines and the like on water sources, water level drops and water storage volumes, and can truly realize the wide application and on-demand design of the underground water pumping and energy storage power station.
Furthermore, the number and depth of the main wells and the auxiliary wells of the underground water pumping energy storage power station based on the self-excavating special water storage space can be determined according to geological conditions, energy storage-energy release circulating water consumption and drainage, exhaust and overhaul requirements. The water pumping and energy storage power station needs to pursue the water level fall as large as possible in the bearable range of equipment, but the ground water pumping and energy storage is limited by the conditions of resources, environment, economy and the like, and the water pumping and energy storage based on abandoned mines is limited by the existing roadway structure. The self-excavating roadway proposal provided by the invention has the advantage that the roadway depth can reach more than kilometers under the permission of geological conditions. The multi-main well design can increase the energy storage-release circulating water quantity, and the multi-auxiliary well design is convenient for auxiliary drainage, air exhaust and maintenance.
Furthermore, the water storage roadway group is self-excavated and constructed, and the water storage space of the roadway group is determined according to geological conditions and energy storage-release circulating water consumption. The scheme breaks through the defect that the abandoned mine goaf cannot be used as a water storage space, and breaks through the defect that the water storage space is limited due to the fact that the goaf occupies a large amount of underground space.
Drawings
Fig. 1 is a schematic structural diagram of a pumped storage power station of the present application.
Fig. 2 is a top view of the pumped storage power station of the present application.
Detailed Description
As shown in fig. 1 and 2, a water pumping and energy storage power station based on self-excavating underground special water storage space is constructed in a way that the underground special water storage space is self-excavated, the water pumping and energy storage power station has a water level drop, and the upstream of the water pumping and energy storage power station is positioned near a water source area 1; a main well 2 is arranged between the upstream and the downstream, the upper end of the main well 2 is communicated with a water source area 1 through a diversion open channel 9, and a diversion control gate 13 is arranged at the upper end of the main well 2; the lower end of the main well 2 is communicated with a water storage roadway group 4; the middle part of the main well 2 is provided with a water turbine set 8, the outer side of the water turbine set 8 is provided with a drainage tunnel 10, the lower end of the drainage tunnel 10 is communicated with the main well 2 at the lower end of the water turbine set 8 through a drainage control gate 14, and the lower end of the drainage tunnel 10 is communicated with the main well 2 at the upper end of the water turbine set 8; a water pump unit 5, a power generation gate 6 and a drainage check valve 7 are arranged between the lower end of the main well 2 and the water storage roadway group 4, wherein the power generation gate 6 and the drainage check valve 7 form a closed space at the outlet of the main well 2, and when the power generation gate 6 is opened, water discharged from the bottom of the main well 2 is discharged from the opening of the power generation gate 6 to the water storage roadway group 4; the water pump unit 5 is positioned outside the water discharge check valve 7, and when the power generation gate 6 is closed and the water pump unit 5 is opened, water discharged into the water storage roadway group 4 is input to the bottom of the main well 2 through the water discharge check valve 7 and is conveyed upwards to the water source area 1.
At least one auxiliary well 3 is arranged on the drainage water storage roadway group 4, an auxiliary well water pump unit 12 is arranged at the bottom of the auxiliary well 3, and the top of the auxiliary well 3 is communicated with the upstream ground; the bottom of the auxiliary well water pump drainage pipe 16 is connected with the auxiliary well water pump unit 12, and the upper end of the auxiliary well water pump drainage pipe 16 extends out of the upstream surface along the pipe wall of the auxiliary well 3 and is led to the upstream drainage ground 11 or a plurality of upstream water source demands. The secondary well 3 may also be in demand communication with the downstream drain 15 or sources via a valve. The auxiliary well can drain the water of the water storage tunnel group to the upstream drainage ground through the auxiliary well water pump unit, and can drain the water of the water storage tunnel group to the downstream drainage ground through the self gravity of the water by utilizing the natural fall of the water source ground and the downstream drainage ground. When the water source place of the water pumping energy storage power station selects reservoirs and natural lakes, and the downstream drainage place selects downstream rivers, the natural fall of the water source place and the downstream drainage place can be utilized, water in the water source place is directly drained to the downstream drainage place through the main well, the water storage roadway group and the auxiliary well, namely, the water discharged from the reservoirs or the lakes can partially or completely flow through the energy storage power station, the power generation capacity is improved, the use of a valley value electric drive auxiliary well water pump unit to pump the water to the upstream drainage place is avoided, and a large amount of cost is saved.
The water storage roadway group 4 is positioned in the horizontal direction, and the height of the water storage roadway group and the upstream fall accords with the technical requirements of the water turbine unit 8; and the water storage roadway group 4 consists of a plurality of roadways which are distributed horizontally and longitudinally in the same horizontal plane.
The water turbine set 8 is installed in the main well 2 or in a dedicated passage communicating with the main well. The main well and the drainage tunnel are separately arranged, and the drainage tunnel is used for enabling water flow to bypass the water turbine unit during drainage. The water turbine unit is installed in the main well or in a water turbine dedicated channel communicated with the main well. When generating electricity, water can flow into the main well through the diversion tunnel; the water inlet during energy release and the water discharge during energy storage are completed through the main well, so that the roadway digging cost can be saved, and the auxiliary well is focused on the auxiliary water discharge, air exhaust and maintenance functions.
In the control method of the water pumping and energy storage power station, when electricity price is valley, the water pump unit 5 is started, and water in the underground water storage roadway group 4 is conveyed to the water source area 1 through the main well 2, the drainage roadway 10 and the drainage control valve 14 by the drainage check valve 7; and/or starting the auxiliary well water pump unit 12 to convey the water of the underground water storage roadway group 4 to the upstream drainage land 11 through the auxiliary well water pump drainage pipe 16; when electricity price is peak, the power generation gate 6 is opened, water in the water source area 1 pushes the water turbine set 8 in the main well to generate power under the action of gravity through the diversion open channel 9 and the diversion control gate 13, and the water is temporarily stored in the underground water storage roadway group 4. The power generation gate 6 is opened at the electricity price peak value, so that water in the water source area 1 drives the water turbine set 8 in the main well 2 to generate power under the action of gravity through the diversion open channel 9, and is closed at the electricity price valley value; when the water pump unit 5 is started up at the electricity price valley value, water in the underground water storage roadway group 4 is conveyed to the water source area 1 through the water drainage check valve 7, the main well 2 and the water drainage roadway 10.
According to the peak-valley price difference of industrial and commercial electricity in 2023 and related professional measurement, when enough water storage volume and water level difference exist, the technical scheme has remarkable economical efficiency.
Claims (6)
1. The water pumping and energy storing power station based on the self-excavating underground special water storage space is characterized in that the construction mode of the water pumping and energy storing power station is that the self-excavating underground special water storage space is adopted, the water pumping and energy storing power station has a water level head, and the upstream of the water pumping and energy storing power station is positioned near a water source area (1); a main well (2) is arranged between the upstream and the downstream, the upper end of the main well (2) is communicated with a water source area (1) through a diversion open channel (9), and a diversion control gate (13) is arranged at the upper end of the main well (2); the lower end of the main well (2) is communicated with the water storage roadway group (4); the middle part of the main well (2) is provided with a water turbine unit (8), the outer side of the water turbine unit (8) is provided with a drainage roadway (10), the lower end of the drainage roadway (10) is communicated with the main well (2) at the lower end of the water turbine unit (8) through a drainage control gate (14), and the lower end of the drainage roadway (10) is communicated with the main well (2) at the upper end of the water turbine unit (8); a water pump unit (5), a power generation gate (6) and a water discharge check valve (7) are arranged between the lower end of the main well (2) and the water storage roadway group (4), wherein the power generation gate (6) and the water discharge check valve (7) form a closed space at the outlet of the main well (2), and when the power generation gate (6) is opened, water discharged from the bottom of the main well (2) is discharged from the opening of the power generation gate (6) to the water storage roadway group (4); the water pump unit (5) is positioned outside the drainage check valve (7), when the power generation gate (6) is closed and the water pump unit (5) is opened, water discharged into the water storage roadway group (4) is input to the bottom of the main well (2) through the drainage check valve (7) and is conveyed upwards to the water source area (1).
2. The water pumping and energy storage power station based on the self-excavating underground special water storage space according to claim 1, wherein at least one auxiliary well (3) is arranged on the drainage water storage roadway group (4), an auxiliary well water pump unit (12) is arranged at the bottom of the auxiliary well (3), and the top of the auxiliary well (3) is communicated with the upstream ground; the bottom of the auxiliary well water pump drainage pipe (16) is connected with the auxiliary well water pump unit (12), and the upper end of the auxiliary well water pump drainage pipe (16) extends out of the upstream surface along the pipe wall of the auxiliary well (3) and is led to an upstream drainage ground (11) or a plurality of upstream water source demand places.
3. The water and energy storage power station based on the self-excavating underground special water storage space according to claim 1, wherein a secondary well (3) is arranged on the water storage roadway group (4), and the secondary well (3) is communicated with a downstream drainage ground (15) or a plurality of downstream water sources in a demand ground through a valve.
4. The water and energy storage power station based on the self-excavating underground special water storage space according to claim 1, wherein the water storage roadway group (4) is positioned in the horizontal direction, and the height of the water storage roadway group and the upstream fall accords with the technical requirement of a water turbine unit (8); and the water storage roadway group (4) consists of a plurality of roadways which are distributed horizontally and longitudinally in the same horizontal plane.
5. The water and energy storage power station based on self-excavating underground dedicated water storage space according to claim 1, characterized in that the water turbine set (8) is installed in the main well (2) or in a dedicated channel communicating with the main well.
6. The control method of the water pumping and energy storage power station according to claim 2, wherein when electricity price is valley, the water pump unit (5) is started, and water in the underground water storage roadway group (4) is conveyed to the water source site (1) through the main well (2), the drainage roadway (10) and the drainage control valve (14) by the drainage check valve (7); and/or starting the auxiliary well water pump unit (12) to convey the water of the underground water storage roadway group (4) to the upstream drainage ground (11) through the auxiliary well water pump drainage pipe (16); when electricity price is peak, the power generation gate (6) is opened, water in the water source area (1) drives the water turbine set (8) in the main well to generate power under the action of gravity through the diversion open channel (9) and the diversion control gate (13), and the water is temporarily stored in the underground water storage roadway group (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311468228.9A CN117248508A (en) | 2023-11-07 | 2023-11-07 | Water pumping energy storage power station based on self-excavating underground special water storage space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311468228.9A CN117248508A (en) | 2023-11-07 | 2023-11-07 | Water pumping energy storage power station based on self-excavating underground special water storage space |
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| Publication Number | Publication Date |
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| CN117248508A true CN117248508A (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311468228.9A Pending CN117248508A (en) | 2023-11-07 | 2023-11-07 | Water pumping energy storage power station based on self-excavating underground special water storage space |
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| Country | Link |
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| CN (1) | CN117248508A (en) |
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2023
- 2023-11-07 CN CN202311468228.9A patent/CN117248508A/en active Pending
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