CN218439481U - Water-gas voltage-stabilizing dual-circulation electricity storage system - Google Patents
Water-gas voltage-stabilizing dual-circulation electricity storage system Download PDFInfo
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- CN218439481U CN218439481U CN202221583927.9U CN202221583927U CN218439481U CN 218439481 U CN218439481 U CN 218439481U CN 202221583927 U CN202221583927 U CN 202221583927U CN 218439481 U CN218439481 U CN 218439481U
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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
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
A water-gas pressure-stabilizing dual-circulation power storage system comprises an underground abandoned roadway reservoir buried underground, wherein the underground abandoned roadway reservoir is directly connected with an air turbine generator set and an air compressor through air transmission pipelines respectively; on the other hand, the underground abandoned roadway reservoir is sequentially connected with the booster pump, the ground water storage pool and the hydroelectric generating set through a water conveying pipeline, and a water side pressure measuring device of the underground abandoned roadway reservoir is arranged at the bottom of the underground abandoned roadway reservoir or on the connected water conveying pipeline. The utility model discloses utilize the incompressible characteristic of compressible characteristic of compressed air and water, maintain the water side pressure stability in the invariable space, reduce the loss of pump turbine in the energy conversion process. Meanwhile, the energy storage density of air is far higher than that of water, so that the original pressure-bearing capacity of the space is reasonably utilized, and the operation cost of the electricity storage system is reduced.
Description
Technical Field
The utility model relates to a aqueous vapor steady voltage dual cycle electricity storage system is applicable to the electricity storage system that underground abandonment mines such as abandonment colliery and ground tank are constituteed.
Background
The scheme of a power generation and energy storage system formed by using underground abandoned mine space and a ground water storage pool is available, most underground mine roadways are high in water column pressure bearing capacity of 500m to 700m and inclined upwards, and when the height difference is 100 to 200m, the water level height difference exceeds the allowable variation range of normal operation of a water pump and a water turbine. In the energy storage stage (namely the stage of supplying water to the ground by using the water pump) of the power generation and energy storage system, due to the sealing property of the underground abandoned mine hole, the pressure of the air side is influenced by air emptying and is continuously reduced, meanwhile, the water level is reduced, and the pressure of the water pump inlet is continuously reduced at the moment, so that the operating condition of the water pump deviates from the normal working condition greatly, the operating efficiency of equipment is lower, and the energy loss is larger; on the contrary, the hydraulic turbine generator set is influenced by variable working conditions, and the efficiency is relatively low. Because the gas side space of the underground abandoned mine hole is in the environment of not more than 1 atmospheric pressure for a long time, space facilities which can bear higher pressure underground are idle, the underground space is not efficiently utilized, the stored electricity capacity is relatively reduced, and the operation and power generation cost is relatively high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the utility model aims at utilizing underground abandoned mine hole gas side space to air compressor carries out the accumulate and maintains the water side pressure to air pressurization, and the variable operating mode scope is far greater than water side equipment principle when utilizing gas side equipment high efficiency operation, maintains invariable space water side pressure stability, and gas side pressure is undulant in the certain limit, guarantees mechanical equipment high efficiency operation. In the electricity storage stage of a power generation and energy storage system formed by the waste mine space and the ground water storage tank, the underground space is inflated during drainage, the water side pressure in the constant space is kept stable, the air side space is allowed to fluctuate by 100-200m water column height, the energy loss of the water pump during working operation is reduced, and the compressed air pressure rise of the air side space of the underground waste mine hole is effectively utilized to increase the storage of electric energy; in the power generation stage of the power generation and energy storage system of the underground abandoned mine and the ground water storage pool (namely, the stage of discharging water stored in the ground water storage pool to the underground abandoned mine hole through the hydraulic generator), compressed air with pressure pushes the turbine to do work, water is filled when the space is deflated, the hydraulic generator set and the air turbine generator set generate power simultaneously, the water side of the space of the underground abandoned mine is maintained, the pressure of the air side is in a reasonable space, the hydraulic generator and the air turbine equipment are ensured to run efficiently, the power storage and the power generation of the water side are increased through the cyclic power storage and the power generation of the compressed air, and the cost of a single power generation mode is greatly reduced.
The technical scheme of the utility model specifically does:
a water-gas pressure-stabilizing dual-circulation power storage system comprises an underground abandoned roadway reservoir buried underground, wherein the underground abandoned roadway reservoir is directly connected with an air turbine generator set and an air compressor through air transmission pipelines respectively; on the other hand, the underground abandoned roadway reservoir is sequentially connected with the booster pump, the ground water storage pool and the hydroelectric generating set through a water conveying pipeline, and a water side pressure measuring device of the underground abandoned roadway reservoir is arranged at the bottom of the underground abandoned roadway reservoir or on the connected water conveying pipeline.
An air turbine inlet electric valve is arranged on an air transmission pipeline between the underground abandoned roadway reservoir and the air turbine generator set, and an air compressor outlet electric valve is arranged on an air transmission pipeline between the underground abandoned roadway reservoir and the air compressor.
The water turbine inlet electric valve is arranged on an inlet pipeline of the water turbine generator set, the water pump inlet electric valve is arranged on a boosting water pump inlet pipeline, and the check valve and the water pump outlet electric valve are respectively arranged on a boosting water pump outlet pipeline.
The utility model has the advantages that: the utility model discloses utilize the incompressible characteristic of compressible characteristic of compressed air and water, maintain the water side pressure stability in the invariable space, reduce the loss of pump turbine in the energy conversion process. Meanwhile, the energy storage density of air is far higher than that of water, the original pressure-bearing capacity of the space is reasonably utilized, the electricity storage power and the electricity storage quantity of single water side circulation are improved through air side circulation, and the operation cost of an electricity storage system is reduced. The method can be widely applied to the field of electricity storage of abandoned coal mines and metal mines.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1, a water-gas pressure-stabilizing dual-cycle power storage system comprises an underground abandoned roadway reservoir 2 buried underground, wherein the underground abandoned roadway reservoir 2 is directly connected with an air turbine generator set 5 and an air compressor 6 through air transmission pipelines respectively, an air turbine inlet electric valve 13 is arranged on the air transmission pipeline between the underground abandoned roadway reservoir 2 and the air turbine generator set 5, an air compressor outlet electric valve 14 is arranged on the air transmission pipeline between the underground abandoned roadway reservoir 2 and the air compressor 6, and an underground abandoned roadway reservoir air side pressure measuring device 12 is arranged at the top of the underground abandoned roadway reservoir 2 or on the connected air pipeline. The underground abandoned roadway reservoir 2, the air turbine generator set 5, the air compressor 6, the underground abandoned roadway reservoir air side pressure measuring device 12, the air turbine inlet electric valve 13 and the air compressor outlet electric valve 14 form an air side electricity storage and generation system. The air turbine inlet electric valve 13 and the air compressor outlet electric valve 14 are used for switching during charging and discharging air, and the air turbine inlet electric valve 13 and the air compressor outlet electric valve 14 have adjusting functions and can adjust the operation states of the air turbine generator set 5 and the air compressor 6 according to the pressure value measured by the underground abandoned roadway reservoir air side pressure measuring device 12.
On the other hand, the underground abandoned roadway reservoir 2 is sequentially connected with the booster water pump 3, the ground water storage tank 1 and the hydroelectric generating set 4 through water pipelines. Further, a water turbine inlet electric valve 7 is arranged on an inlet pipeline of the water turbine generator set 4, a water pump inlet electric valve 10 is arranged on an inlet pipeline of the boosting water pump 3, a check valve 9 and a water pump outlet electric valve 8 are respectively arranged on an outlet pipeline of the boosting water pump 3, and an underground abandoned roadway reservoir water side pressure measuring device 11 is arranged at the bottom of the underground abandoned roadway reservoir 2 or on a connected water pipeline. The underground abandoned roadway reservoir 2, the boosting water pump 3, the ground water storage tank 1, the hydroelectric generating set 4, the water turbine inlet electric valve 7, the water pump inlet electric valve 10, the check valve 9, the water pump outlet electric valve 8 and the underground abandoned roadway reservoir water side pressure measuring device 11 form a water side electricity storage and generation system. Wherein, the electric valve 7 of hydraulic turbine import, the switching when water pump export electric valve 8 is used for filling the water, and electric valve 7 of hydraulic turbine import, water pump export electric valve 8 have regulatory function can be according to the pressure value adjustment hydroelectric set 4 of underground abandoned tunnel reservoir water side pressure measurement device 11 survey, the operating condition of water pump 3 steps up.
The utility model discloses a theory of operation as follows:
a first starting stage: after the system is installed and constructed, the underground abandoned roadway reservoir 2 is in a water-free state, and water seeped out of an underground mine in the construction process is pumped out by the booster pump 3 in the construction period and is stored in the ground water reservoir 1. When an external power grid needs power, the electric valve 7 at the water turbine inlet is opened and adjustment control is carried out, water in the ground water storage pool 1 pushes the water turbine generator set 4 to generate power through a pipeline and is discharged into the underground abandoned roadway reservoir 2, at the moment, the electric valve 13 at the air turbine inlet and the electric valve 14 at the air compressor outlet are in a closed state, along with the rise of the water level of the underground abandoned roadway reservoir 2, the pressure value measured by the pressure measuring device 12 at the air side of the underground abandoned roadway reservoir and the pressure measuring device 11 at the water side of the underground abandoned roadway reservoir rise, when the pressure value at the air side rises to a set value, the electric valve 13 at the air turbine inlet is opened and adjustment control is carried out, high-pressure compressed air at the air side of the underground abandoned roadway reservoir 2 pushes the air turbine generator set 5 to generate power and then is discharged into the atmosphere, and the adjustment of the electric valve 13 at the air turbine inlet ensures that the pressure measured by the pressure measuring device 12 at the air side of the underground abandoned roadway reservoir is stabilized in a certain range. And when the water in the ground water storage tank 1 is discharged to the underground waste roadway reservoir 2, closing the electric valve 7 at the water turbine inlet and the electric valve 13 at the air turbine inlet, stopping the water turbine generator set 4 and the air turbine generator set 5, ending the power generation process in the starting stage, and recording the pressure value measured by the pressure measuring device 11 at the water side of the underground waste roadway reservoir at the moment as a final set value.
And (3) an electricity storage stage: when the electric quantity of the external power grid is surplus and needs to store electricity, the water pump inlet electric valve 10 and the water pump outlet electric valve 8 are opened, the boosting water pump 3 is started, water in the underground abandoned roadway reservoir 2 is lifted to the ground water storage tank 1, the water level of the underground abandoned roadway reservoir 2 is lowered at the moment, the pressure values measured by the underground abandoned roadway reservoir air side pressure measuring device 12 and the underground abandoned roadway water side pressure measuring device 11 are lowered, the air compressor outlet electric valve 14 is opened, the air compressor 6 is put into operation, the opening degree of the air compressor outlet electric valve 14 is controlled by the underground abandoned roadway reservoir air side pressure measuring device 12, when the difference between the pressure measured by the underground abandoned roadway reservoir water side pressure measuring device 11 and the value measured by the underground abandoned roadway reservoir air side pressure measuring device 12 is lower than a certain value, the normal operation of the boosting water pump 3 cannot be guaranteed by the water level of the underground abandoned roadway 2, the water pump outlet electric valve 8 and the water pump inlet electric valve 10 are sequentially closed, the boosting water pump 3 is stopped, the air compressor 6 is stopped, the air compressor outlet electric valve 14 is closed, and the electricity storage process is completed. Because the data is monitored by the underground abandoned roadway reservoir air side pressure measuring device 12 and the underground abandoned roadway reservoir water side pressure measuring device 11, the water side pressure stability of the underground abandoned roadway reservoir 2 is maintained, the air side pressure fluctuates in a certain range, the efficient operation of the equipment of the booster water pump 3 and the air compressor 6 is ensured, and the energy loss in the electricity storage process is reduced. Because the air compressor 6 pressurizes the compressed air to the underground abandoned roadway reservoir 2, the pressure of the underground abandoned roadway reservoir 2 in a basically water-free state is improved, the pressure bearing capacity of the space is utilized, the water pump converts the electric energy into the high potential energy of the water, the air compressor 6 converts the electric energy into the compressed potential energy of the air, and the power and the electric energy storage quantity of the electric energy are increased.
A power generation stage: when an external power grid needs power, the air turbine inlet electric valve 13 is opened and adjustment control is carried out, high-pressure compressed air on the air side of the underground abandoned roadway reservoir 2 pushes the air turbine generator set 5 to generate power and then to be discharged into the atmosphere, due to air pressure relief, the pressure value measured by the underground abandoned roadway reservoir air side pressure measuring device 12 and the underground abandoned roadway reservoir water side pressure measuring device 11 is reduced, the water turbine inlet electric valve 7 is opened and adjustment control is carried out, water in the ground water storage pool 1 pushes the water turbine generator set 4 to generate power through a pipeline and is discharged into the underground abandoned roadway 2, and the opening degree of the air turbine inlet electric valve 13 is controlled by the pressure value measured by the underground abandoned roadway reservoir air side pressure measuring device 12. And when the difference between the pressure intensity measured by the underground waste roadway reservoir water side pressure measuring device 11 and the value measured by the underground waste roadway reservoir air side pressure measuring device 12 is higher than a certain value, indicating that the pressure bearing of the underground waste roadway reservoir 2 reaches the vicinity of a design value, sequentially closing the water turbine inlet electric valve 7, stopping the operation of the water turbine generator set 4, closing the air turbine inlet electric valve 13, stopping the operation of the air turbine generator set 5, and ending the power generation process. Because the water side pressure stability of the underground abandoned roadway reservoir 2 is maintained through the monitoring data of the underground abandoned roadway reservoir air side pressure measuring device 12 and the underground abandoned roadway reservoir water side pressure measuring device 11, the air side pressure fluctuates in a certain range, the efficient operation of the equipment of the water turbine generator set 4 and the air turbine generator set 5 is ensured, and the energy loss in the power generation process is reduced. During the power generation process, the water turbine converts the high potential energy of water into electric energy, and the compressed potential energy of air of the air turbine generator set is converted into electric energy, so that the power and the generated energy of power generation are increased.
When the utility model is used for storing electricity, the boosting water pump 3 lifts the water in the underground abandoned roadway reservoir 2 to the ground water storage tank 1 for storage, and the electric energy is converted into high potential energy of the water; meanwhile, the air compressor 6 pressurizes air, the air is stored in the underground abandoned roadway reservoir 2, and electric energy is converted into pressure potential energy of the air; during the electricity generation, the compressed air under pressure that stores in underground abandonment tunnel reservoir 2 is washed and is changeed air turbine generator set 5, converts the pressure potential energy of air into the electric energy, and the water that ground tank 1 stored simultaneously is washed and is changeed hydroelectric set 4, converts the high potential energy of water into the electric energy, realizes water side, gas side dual cycle electricity storage function, increases accumulate power and electric storage capacity.
The pressure fluctuation monitoring device is characterized in that an underground abandoned roadway reservoir water side pressure measuring device 11 is arranged at the bottom of the underground abandoned roadway reservoir 2 or on a connected water pipeline, an underground abandoned roadway reservoir air side pressure measuring device 12 is arranged at the top of the underground abandoned roadway reservoir 2 or on a connected air pipeline, the pressure fluctuation is monitored during operation, the connected electric valve and the connected equipment are controlled to maintain the water side pressure stability of the underground abandoned roadway reservoir 11, the high-efficiency operation of the water side equipment is ensured, the air side pressure is allowed to fluctuate within a certain range, and the high-efficiency operation of the air side equipment is maintained.
While the preferred embodiments of the present invention have been described, it should be understood that various changes and modifications may be made therein by those skilled in the art without departing from the general concept of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (2)
1. The utility model provides a aqueous vapor steady voltage dual cycle power storage system which characterized in that: the underground abandoned roadway reservoir system comprises an underground abandoned roadway reservoir (2) buried underground, wherein the underground abandoned roadway reservoir (2) is directly connected with an air turbine generator set (5) and an air compressor (6) through air transmission pipelines respectively, and an air side pressure measuring device (12) of the underground abandoned roadway reservoir is arranged at the top of the underground abandoned roadway reservoir (2) or on the connected air pipeline; on the other hand, the underground abandoned roadway reservoir (2) is sequentially connected with the booster water pump (3), the ground water reservoir (1) and the hydroelectric generating set (4) through water pipelines, and the bottom of the underground abandoned roadway reservoir (2) or the connected water pipelines are provided with an underground abandoned roadway reservoir water side pressure measuring device (11);
the electric valve (7) of the water turbine inlet is arranged on an inlet pipeline of the water turbine generator set (4), the electric valve (10) of the water pump inlet is arranged on an inlet pipeline of the boosting water pump (3), and the check valve (9) and the electric valve (8) of the water pump outlet are respectively arranged on an outlet pipeline of the boosting water pump (3).
2. The water gas voltage stabilization dual cycle electricity storage system according to claim 1, wherein: an air turbine inlet electric valve (13) is arranged on an air conveying pipeline between the underground abandoned roadway reservoir (2) and the air turbine generator set (5), and an air compressor outlet electric valve (14) is arranged on an air conveying pipeline between the underground abandoned roadway reservoir (2) and the air compressor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221583927.9U CN218439481U (en) | 2022-06-23 | 2022-06-23 | Water-gas voltage-stabilizing dual-circulation electricity storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221583927.9U CN218439481U (en) | 2022-06-23 | 2022-06-23 | Water-gas voltage-stabilizing dual-circulation electricity storage system |
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| Publication Number | Publication Date |
|---|---|
| CN218439481U true CN218439481U (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221583927.9U Active CN218439481U (en) | 2022-06-23 | 2022-06-23 | Water-gas voltage-stabilizing dual-circulation electricity storage system |
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| CN (1) | CN218439481U (en) |
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2022
- 2022-06-23 CN CN202221583927.9U patent/CN218439481U/en active Active
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