CN117329092A - Vertical shaft array energy storage system and use method thereof - Google Patents
Vertical shaft array energy storage system and use method thereof Download PDFInfo
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- CN117329092A CN117329092A CN202210738189.9A CN202210738189A CN117329092A CN 117329092 A CN117329092 A CN 117329092A CN 202210738189 A CN202210738189 A CN 202210738189A CN 117329092 A CN117329092 A CN 117329092A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003860 storage Methods 0.000 claims abstract description 56
- 238000010248 power generation Methods 0.000 claims abstract description 31
- 230000004044 response Effects 0.000 claims abstract description 21
- 238000005381 potential energy Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 7
- 230000001174 ascending effect Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims 1
- 230000032258 transport Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D8/00—Shafts not provided for in groups E21D1/00 - E21D7/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
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- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a vertical shaft array energy storage system and a use method thereof, and relates to the technical field of clean energy power generation and energy storage, wherein the vertical shaft array energy storage system comprises a plurality of vertical shafts, a plurality of weights, a plurality of power generation devices, a temporary storage warehouse and a transportation roadway which are arranged at intervals; the wellhead of each vertical shaft is provided with at least one power generation device; the transportation tunnel and the temporary storage warehouse are arranged below the plurality of vertical wells, and the transportation tunnel can be communicated with each vertical well and the temporary storage warehouse; the temporary storage warehouse is used for storing the weight blocks; the power generation device comprises a lifter and a generator, the lifter can drive the weight to move along the extending direction of the vertical shaft, and the generator is used for generating power when the weight falls. The arrangement of the temporary storage warehouse and the transportation roadway can facilitate the vertical shaft array to store more weight blocks for energy storage, and the response speed is improved, so that a single vertical shaft can be utilized more efficiently. Meanwhile, the system can simultaneously control the weights in a plurality of shafts to start moving, so that the response speed is faster when the same output power is achieved.
Description
Technical Field
The invention relates to the technical field of clean energy power generation and energy storage, in particular to a vertical shaft array energy storage system and a using method thereof.
Background
The peak-to-peak, carbon neutralization goal is a global consensus for coping with climate change. The new energy power stations such as photovoltaic power stations and wind energy in China are mainly distributed in western regions, photovoltaic power generation is concentrated in daytime, power loads are mainly distributed in middle eastern regions, and the proportion of power consumption at night is larger, so that the new energy power production and consumption in China have strong space-time mismatch. On the other hand, new energy sources such as wind power, photovoltaic and the like are intermittent energy sources, the power generation is greatly influenced by meteorological conditions and randomly fluctuates, and particularly after the direct grid connection proportion exceeds 20%, the whole power grid can be greatly influenced. The energy storage technology with low cost, large capacity and easy site selection can solve the problems of space-time mismatch and grid connection stability, and is an important guarantee for large-scale application of renewable energy sources.
Currently, existing types of electrical energy storage technologies include mechanical energy storage, chemical energy storage, electromagnetic energy storage, thermal storage, and the like. The pumping energy storage technology in mechanical energy storage is most typical, and has the advantages of large energy storage capacity, high response speed and wide practical application at home and abroad. However, building the water pumping and energy storage power station requires proper geographical conditions and water resources, is limited in application, and has long construction period, high initial investment cost and general energy conversion efficiency of about 70%. And the solid material with higher density is used for replacing water, so that the energy density of the energy storage system can be improved, and the application limit of the latter region is broken through.
The ground large-scale supporting structure is adopted, the scheme of gravity energy storage is realized through lifting of the weight, the construction is flexible, the theoretical efficiency can reach 90%, and the gravitational potential energy is in direct proportion to the product of the mass and the height. However, it is not economical to construct a support structure with a great bearing capacity on the ground. Therefore, the energy storage system of the single shaft or the waste mine is transformed, and the potential difference height can be fully utilized, but the total energy storage amount of the single shaft is limited, and the utilization rate of the weight and the shaft is low; on the other hand, the system charge and discharge processes depend on the movement of a single weight, and the response speed is low.
Disclosure of Invention
The invention aims to provide a vertical shaft array energy storage system and a use method thereof, which are used for relieving the limitation of the total energy storage amount of a single well in the prior art and low utilization rate of a weight and a vertical shaft; on the other hand, the system charge and discharge processes depend on the movement of a single weight, and the response speed is low.
The invention provides a vertical shaft array energy storage system which comprises a plurality of vertical shafts, a plurality of weights, a plurality of power generation devices, a temporary storage warehouse and a transportation roadway, wherein the vertical shafts, the weights, the power generation devices, the temporary storage warehouse and the transportation roadway are arranged at intervals; the wellhead of each vertical shaft is provided with at least one power generation device; the transportation tunnel and the temporary storage warehouse are arranged below the plurality of vertical wells, and the transportation tunnel can be communicated with each vertical well and the temporary storage warehouse; the temporary storage warehouse is used for storing the weight blocks; the power generation device comprises a lifter and a generator, the lifter can drive the weight to move along the extending direction of the vertical shaft, and the generator is used for generating power when the weight falls.
Further, the vertical shaft array energy storage system further comprises a conveying device; the transport device can move in the temporary storage warehouse and the transport tunnel, and the transport device is used for transporting the weight.
Further, the lifter comprises at least one stay cord; one end of the pull rope is connected with the lifter, and the other end of the pull rope is connected with at least one weight.
Further, a storage platform is arranged at the wellhead of the vertical shaft; the horizontal plane of the storage platform is the same as the height of a shaft mouth; the storage platform is used for storing the weight blocks.
Further, a heightening platform is arranged on the storage platform; the horizontal plane of the heightening platform is higher than the height of the shaft mouth of the vertical shaft; the heightening platform is used for storing the weight blocks.
Further, the diameter of the vertical shaft is 0.5-100m; the depth of the vertical shaft is 10-2000m; the well head spacing of the plurality of vertical shafts is 10-5000m.
Furthermore, the invention also provides a use method of the vertical shaft array energy storage system, which comprises the following steps:
a step of placing a plurality of weights in a temporary storage warehouse;
moving the weight to the lower part of the vertical shaft along the transportation roadway;
a step of supplying power to the lifter by the new energy power station;
and a step of lifting the weight in one or more shafts by using an elevator to convert the electric energy into gravitational potential energy of the weight.
Further, when power supply is needed, the elevator drives the weight to descend so as to enable the generator to generate power.
Further, the shaft array energy storage system further comprises a control mechanism, and when a quick response of output power adjustment is required to be realized, the shaft array energy storage system operates in the following working mode through the control mechanism:
weights in multiple shafts being actuated simultaneously to achieve multiple actuation power outputs for a single shaft, and/or
The weight blocks with balanced charging and power generation in the multiple vertical shafts run in opposite directions in pairs, one weight block charges, ascends and stores energy, and the other weight block descends to generate power; when instantaneous high power output is required, power to the ascending weight is cut off, and/or
And (3) when the super capacitor is used for realizing instantaneous high-power output, and when the vertical shaft array energy storage system reaches stable output power, the super capacitor is charged for the next response.
Furthermore, the vertical shaft array energy storage system can be matched with a new energy power station for use; the vertical shaft array energy storage system is used for being connected with a new energy power station.
When the clean energy grid-connected power generation load exceeds the power demand of the power grid, the system is used for storing energy; and when the clean energy grid-connected power generation load is lower than the power demand of the power grid, releasing energy and supplementing the power demand of the power grid.
According to the shaft array energy storage system, in the use process, the plurality of weights are stored in the temporary storage warehouse below the shaft, in the energy storage process, a worker transports one or more weights to the position below one or more shafts through the transportation roadway, then the weights are electrified by the lifter and lifted to the wellhead, the weights are placed, and the gravity potential energy of the weights is increased by the height difference of the shaft. When the working condition of power output is needed, the weight falls down by the lifting mechanism, and meanwhile, the generator is used for generating electricity to convert the gravitational potential energy of the weight into electric energy. From the above, the system does not need an ultrahigh supporting structure, and only needs to utilize the vertical shaft potential difference to realize energy storage, so that the system is better in stability and more economical. Compared with a single well in the prior art, the arrangement of the temporary storage warehouse and the transportation roadway can facilitate the vertical shaft array to store more weight blocks for energy storage, improve the response speed and enable the single vertical shaft to be more efficiently utilized. Meanwhile, the arrangement can simultaneously control the weights in a plurality of shafts to start moving, so that the response speed is faster when the same output power is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of a shaft array energy storage system according to an embodiment of the present invention along a direction parallel to an extension direction of a shaft thereof;
FIG. 2 is a schematic diagram of a temporary storage inventory weight according to an embodiment of the present invention;
fig. 3 is a schematic view of various matching forms between a shaft and a weight according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a vertical shaft array energy storage system provided by an embodiment of the present invention;
fig. 5 is a block diagram of steps of a method for using a shaft array energy storage system according to an embodiment of the present invention;
fig. 6 is a top view of a vertical shaft array energy storage system according to an embodiment of the present invention.
Icon: 1-a vertical shaft; 2-weight block; 3-a power generation device; 4-a temporary repository; 5-a transportation roadway; 6-a transportation device; 7-pulling ropes; 8-a storage platform; 9-heightening a platform; 10-a wind power station; 11-a photovoltaic power plant; 301-an elevator; 302-generator.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic cross-sectional view of a shaft array energy storage system according to an embodiment of the present invention along a direction parallel to an extension direction of a shaft thereof; FIG. 2 is a schematic diagram of a temporary storage inventory weight according to an embodiment of the present invention; as shown in fig. 1 and fig. 2, the shaft array energy storage system provided by the embodiment of the invention comprises a plurality of shafts 1, a plurality of weights 2, a plurality of power generation devices 3, a temporary storage warehouse 4 and a transportation roadway 5 which are arranged at intervals; the wellhead of each shaft 1 is provided with at least one power generation device 3; the transportation tunnel 5 and the temporary storage warehouse 4 are arranged below the plurality of vertical shafts 1, and the transportation tunnel 5 can be communicated with each vertical shaft 1 and each temporary storage warehouse 4; the temporary storage warehouse 4 is used for storing the weight 2; the power generation device 3 includes a lifter 301 and a generator 302, the lifter 301 being capable of driving the weight 2 to move in the extending direction of the shaft 1, the generator 302 being used for generating power when the weight 2 falls.
The distribution manner of the plurality of shafts 1 can be determined according to practical situations, and the distribution of the array can be square lattice, triangular lattice, circular lattice or other combination forms. The location of the temporary storage 4 and the distribution of the conveyor 5 should be matched to the distribution of the shafts 1.
Preferably, under the premise of ensuring that the transportation roadway 5 can be communicated with each vertical shaft 1 and the temporary storage warehouse 4, the path of the transportation weight 2 is shortened, so that excessive energy, equipment and manpower consumption are avoided, the response time is shortened, and the efficiency is improved.
The arrangement of the temporary storage 4 may be equally applicable to single wells in the prior art.
The weight 2 is a standard weight and is square, polygonal or cylindrical in shape. The mass is 0.5-1000t. Based on lifting force of the lifting equipment and difficulty of manufacturing process, the weight 2 with the weight is preferably 20t, lifting is easier to achieve, and the application range is wider.
Further, the diameter of the vertical shaft 1 is 0.5-100m; the depth of the vertical shaft 1 is 10-2000m; the wellhead spacing of the shafts 1 is 10-5000m. The lifting force of the lifting equipment and the difficulty of the manufacturing process are taken into consideration, the construction process is simpler, the implementation is easy, and the application range is wider.
The cross-sectional shape of the shaft 1 may be polygonal or circular in a direction perpendicular to the direction in which the shaft 1 extends.
The number of power generation devices 3 which can be arranged at the wellhead of each vertical shaft 1 according to actual conditions.
The vertical shaft array energy storage system provided by the embodiment of the invention comprises a plurality of vertical shafts 1, a plurality of weights 2, a plurality of power generation devices 3, a temporary storage warehouse 4 and a transportation roadway 5 which are arranged at intervals; the wellhead of each shaft 1 is provided with at least one power generation device 3; the transportation tunnel 5 and the temporary storage warehouse 4 are arranged below the plurality of vertical shafts 1, and the transportation tunnel 5 can be communicated with each vertical shaft 1 and each temporary storage warehouse 4; the temporary storage warehouse 4 is used for storing the weight 2; the power generation device 3 includes a lifter 301 and a generator 302, the lifter 301 being capable of driving the weight 2 to move in the extending direction of the shaft 1, the generator 302 being used for generating power when the weight 2 falls. During use, the weights 2 are stored in the temporary storage warehouse 4 below the vertical shafts 1, during energy storage, workers transport one or more weights 2 to the position below the vertical shafts 1 through the transportation roadway 5, then the elevators 301 are used for electrifying and lifting the weights 2 to the wellhead, the weights 2 are placed, and the gravity potential energy of the weights 2 is increased by the height difference of the vertical shafts 1. When the working condition of power output is needed, the weight 2 is lowered by the lifter 301, and meanwhile, the generator 302 is used for generating electricity, so that the gravitational potential energy of the weight 2 is converted into electric energy. From the above, the system does not need an ultrahigh supporting structure, and only needs to utilize the 1-level difference of the vertical shaft to realize energy storage, so that the system is better in stability and more economical. Compared with a single well in the prior art, the arrangement of the temporary storage warehouse 4 and the transportation roadway 5 can facilitate the vertical shaft 1 to store more weight blocks 2 for energy storage in an array, improve the response speed and enable the single vertical shaft 1 to be utilized more efficiently. At the same time, the above arrangement enables simultaneous control of the start of movement of the weights 2 in the shafts 1, and thus a faster response speed when the same output power is achieved.
As shown in fig. 1, further, on the basis of the above embodiment, the shaft array energy storage system further includes a transporting device 6; the transport device 6 is movable in the temporary storage 4 and the transport tunnel 5, and the transport device 6 is used for transporting the weight 2.
Wherein the transportation means 6 may comprise a transportation vehicle. In use, a worker moves the weight 2 into a transport vehicle, which transports it to below the designated shaft 1.
The transport device 6 may also comprise a transport rail and an electric trolley arranged on the transport rail. The electric trolley can move along the transportation track, and the transportation track is paved in a mode that the moving path of the electric trolley passes through the lower part of any vertical shaft 1 and the temporary storage warehouse 4. When the vertical shaft 1 is used, a worker moves the weight 2 to the electric trolley, and the electric trolley automatically sends the weight 2 to the lower part of the designated vertical shaft 1 along the transportation track.
In this embodiment, the transport device 6 is provided to increase the transport speed of the weight 2, thereby increasing the response speed of the system.
Further to the above embodiment, the lifter 301 includes at least one pull rope 7 thereon; one end of the pull rope 7 is connected to the lifter 301, and the other end is connected to at least one weight 2.
Fig. 3 is a schematic view of various matching forms between a shaft and a weight according to an embodiment of the present invention; as shown in fig. 3, the three matching forms are sequentially from left to right: the single well single rope lifts a plurality of weights 2, the single well multiple rope lifts a plurality of weights 2, the single well is provided with a plurality of sets of power generation devices 3, and each set of power generation devices 3 lifts a single weight 2 for the single rope.
In this embodiment, a single well may have one or more weights 2 lifted with a single rope; or a single well may have multiple ropes lifting one or more weights 2. The adjustment can be performed according to actual requirements and actual conditions of the vertical shaft 1 array.
As shown in fig. 1 and 2, further, on the basis of the above embodiment, a storage platform 8 is arranged at the wellhead of the vertical shaft 1; the horizontal plane of the storage platform 8 is the same as the height of the wellhead of the vertical shaft 1; the storage platform 8 is used for storing the weight 2.
Wherein the power generation device 3 is fixedly arranged on the storage platform 8.
Fig. 4 is a schematic structural diagram of a vertical shaft array energy storage system provided by an embodiment of the present invention; as shown in fig. 4, further, the storage platform 8 is provided with a heightening platform 9; the horizontal plane of the heightening platform 9 is higher than the height of the wellhead of the vertical shaft 1; the lifting platform 9 is used for storing the weight 2.
Preferably, the height-increasing platform 9 is a detachable platform.
The staff can set up the height-increasing platform 9 on one or more of the storage platforms 8 according to the actual situation.
Wherein the power generation device 3 is fixedly arranged on the heightening platform 9.
In addition, the slag soil, rock and the like excavated during construction of the vertical shaft 1 can be partially used for preparing the weight 2, and the rest can be used for preparing the heightening platform 9, so that the slag soil, rock and the like are fully utilized.
In this embodiment, the height-increasing platform 9 is a platform protruding from the wellhead of the shaft 1, so that the potential energy of the shaft 1 and the potential energy of the weight 2 can be increased, and the energy storage capability can be improved.
Fig. 5 is a block diagram of steps of a method for using a shaft array energy storage system according to an embodiment of the present invention. As shown in fig. 5, further, on the basis of the above embodiment, the embodiment of the present invention further provides a method for using a shaft array energy storage system, where the method includes:
a step of placing a plurality of weights 2 in a temporary storage 4;
a step of moving the weight 2 to the lower part of the vertical shaft 1 along the transportation tunnel 5;
a step of supplying power to the lifter 301 by the new energy power station;
a step of lifting the weights 2 in one or more shafts 1 by means of the elevator 301 and converting the electric energy into gravitational potential energy of the weights 2.
Further, when power supply is required, the lifter 301 drives the weight 2 to descend so as to enable the generator 302 to generate power.
Further, the shaft array energy storage system further comprises a control mechanism, and when a quick response of output power adjustment is required to be realized, the shaft array energy storage system operates in the following working mode through the control mechanism:
weights in multiple shafts are activated simultaneously to achieve multiple power outputs from a single shaft, so that the response speed to achieve the same power output is faster, and/or
The weight blocks 2 of the two charging and generating balances in the multiple shafts run in opposite directions in pairs, the running speed is selected to run at full speed, one full-speed ascending weight block 2 charges, ascends and stores energy, and one weight block 2 descends at full speed to generate electricity; when the instantaneous high-power output is needed, the power supply of the ascending weight 2 is cut off, the ascending weight 2 stops ascending and keeps the height unchanged, at the moment, the descending weight 2 continues descending, so that the instantaneous high-power output of the descending weight 2 is realized, and the response time can reach millisecond level or even shorter. It should be noted that the above-mentioned operation mode of instantaneous high power output can be equally applied to single well in the prior art, and/or
When power generation is needed, the super capacitor is utilized to realize high-power rapid output at the beginning instant, and during the period, the vertical shaft array energy storage system achieves stable output power. The generator 302 then charges the supercapacitor for the next fast response.
The three working modes can be used independently or in combination. The cost of a regulating system and a device can be reduced while the rapid regulation and control of the power are realized.
In this embodiment, during the use, a plurality of weights 2 are stored in a temporary storage warehouse 4 below a vertical shaft 1, during the energy storage process, a worker transports one or a plurality of weights 2 to one or a plurality of vertical shafts 1 through a transportation roadway 5, a new energy power station elevator 301 supplies power, the elevator 301 is electrified and lifts the weights 2 to a wellhead, the weights 2 are placed, and the gravity potential energy of the weights 2 is increased by the height difference of the vertical shafts 1. When the working condition of power output is needed, the weight 2 is lowered by the lifter 301, and meanwhile, the generator 302 is used for generating electricity, so that the gravitational potential energy of the weight 2 is converted into electric energy. According to the method for using the vertical shaft array energy storage system, operators do not need to set an ultrahigh supporting structure, and only need to use the vertical shaft 1 level difference to realize energy storage, so that the vertical shaft array energy storage system is better in stability and more economical. Compared with the arrangement of a single well in the prior art, the arrangement of the temporary storage warehouse 4 and the transportation roadway 5 can facilitate the vertical shaft 1 to store more weight blocks 2 for energy storage in an array, improve the response speed and enable the single vertical shaft 1 to be utilized more efficiently. Meanwhile, the use method can simultaneously control the weights 2 in the shafts 1 to start moving, so that the response speed is faster when the same output power is achieved.
Fig. 6 is a top view of a shaft array energy storage system provided by an embodiment of the present invention; as shown in fig. 6, further, based on the above embodiment, the shaft array energy storage system can be used with a new energy power station; and the vertical shaft array energy storage system is used for being connected with the new energy power station.
The new energy power station may be a wind power station 10 or a photovoltaic power station 11, etc.
The vertical shaft array energy storage system can be matched with a vertical shaft array air space of a new energy power station. The new energy power station can be distributed on the ground between the vertical shaft arrays.
In this embodiment, the new energy power station is used to supply power to the shaft array energy storage system. It should be noted that the shaft array energy storage system can select whether the new energy power station is matched for use. Namely: the vertical shaft array energy storage system can be used alone or in combination with a new energy power station.
When the weight 2 is lifted to store energy, the national power grid can be used for supplying power.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The vertical shaft array energy storage system is characterized by comprising a plurality of vertical shafts, a plurality of weights, a plurality of power generation devices, a temporary storage warehouse and a transportation roadway, wherein the vertical shafts, the weights, the power generation devices, the temporary storage warehouse and the transportation roadway are arranged at intervals;
at least one power generation device is arranged at the wellhead of each vertical shaft; the transportation roadway and the temporary storage warehouse are arranged below a plurality of vertical wells, and the transportation roadway can be communicated with each vertical well and each temporary storage warehouse; the temporary storage warehouse is used for storing the weight; the power generation device comprises a lifter and a generator, the lifter can drive the weight to move along the extending direction of the vertical shaft, and the generator is used for generating power when the weight falls down.
2. The shaft array energy storage system of claim 1, further comprising a transport device;
the transport device is movable in the temporary storage and the transport lane, and the transport device is used for transporting the weight.
3. The shaft array energy storage system of claim 1, wherein the lift includes at least one pull rope thereon;
one end of the pull rope is connected with the lifter, and the other end of the pull rope is connected with at least one weight.
4. The shaft array energy storage system of claim 1, wherein a storage platform is provided at a wellhead of the shaft;
the horizontal plane of the storage platform is the same as the height of the shaft mouth; the storage platform is used for storing the weight.
5. The shaft array energy storage system of claim 4, wherein the storage platform is provided with a booster stage;
the horizontal plane of the heightening platform is higher than the height of the shaft mouth; the heightening platform is used for storing the weight.
6. The shaft array energy storage system of claim 1, wherein the shaft has a diameter of 0.5-100m; the depth of the vertical shaft is 10-2000m; the wellhead spacing of the vertical shafts is 10-5000m.
7. A method of using the shaft array energy storage system of any one of claims 1-6, comprising:
a step of placing a plurality of weights in the temporary repository;
a step of moving the weight to the lower part of the vertical shaft along the transportation roadway;
a step of supplying power to the lifter by the new energy power station;
and lifting the weight blocks in one or more vertical shafts by using the lifter, and converting electric energy into gravitational potential energy of the weight blocks.
8. The method of claim 7, wherein when power is required, the elevator moves the weight downward to cause the generator to generate electricity.
9. The method of claim 8, further comprising a control mechanism by which the shaft array energy storage system operates in the following modes of operation when a fast response to output power adjustment is desired:
the weights in a plurality of the shafts are activated simultaneously to achieve multiple activation power outputs of a single shaft, and/or
The weights in the vertical shafts, which are balanced in charging and generating electricity, run in opposite directions in pairs, one weight is charged, ascends and stores energy, and the other weight descends to generate electricity; when instantaneous high power output is required, power supply to the ascending weight is cut off, and/or
And at the beginning, realizing instantaneous high-power output by using a super capacitor, and charging the super capacitor for the next response when the vertical shaft array energy storage system reaches stable output power.
10. The method of using a shaft array energy storage system according to any one of claims 7-9, wherein the shaft array energy storage system is capable of being used with a new energy power station;
and the vertical shaft array energy storage system is used for being connected with the new energy power station.
Priority Applications (1)
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