CN113978489A - Rail transportation energy storage system and operation method thereof - Google Patents
Rail transportation energy storage system and operation method thereof Download PDFInfo
- Publication number
- CN113978489A CN113978489A CN202111482313.1A CN202111482313A CN113978489A CN 113978489 A CN113978489 A CN 113978489A CN 202111482313 A CN202111482313 A CN 202111482313A CN 113978489 A CN113978489 A CN 113978489A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- shuttle
- loading
- lifting mechanism
- blocks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 209
- 238000000034 method Methods 0.000 title claims description 22
- 238000003860 storage Methods 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 78
- 238000010248 power generation Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 8
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims 2
- 230000002787 reinforcement Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 description 14
- 230000001965 increasing effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- 230000002411 adverse Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012983 electrochemical energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
- B61C17/06—Power storing devices
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Warehouses Or Storage Devices (AREA)
Abstract
A rail transportation energy storage system is provided with a power generation mode and an energy storage mode, at least one rail extends from a bottom storage field to a top storage field, loading and unloading rails for storing energy storage blocks are arranged on the bottom storage field and the top storage field, a plurality of lifting mechanisms are uniformly distributed on two sides of each loading and unloading rail, and at least one shuttle vehicle can reciprocate between the bottom storage field and the top storage field; loading and unloading the energy storage block to the shuttle car by using the lifting mechanism; realize high-efficient, convenient energy storage piece loading and unloading.
Description
Technical Field
The invention relates to a rail transportation energy storage system, and belongs to the field of large-scale electric power energy storage.
Background
The use of energy in human society is limited by reserves, and fossil energy such as coal, petroleum, natural gas and the like which pollute the environment are used in production and life. The traditional pollution energy is converted into inexhaustible dependence, and inexhaustible, clean, environment-friendly and renewable solar energy, wind energy and other renewable energy sources are the historical necessity.
In recent years, with the acceleration of energy structure transformation speed in China, clean energy enters a new stage of large-scale development, and as late as 2019, the installed capacity of the clean energy accounts for 40.8% of the total installed capacity, renewable energy such as wind power, photovoltaic and the like are greatly connected to the grid, the power structure in China is improved to a great extent, and the power greening level is promoted, but due to the fact that the generated power of the wind power, the photovoltaic and the like has the adverse factors such as intermittence, volatility and the like, the large-scale grid connection of the wind power, the photovoltaic and the like brings many adverse effects to a power grid, meanwhile, a large amount of 'wind abandoning and light abandoning' is also caused, and the new energy absorption capacity is limited to a certain degree. Particularly for a new energy power generation system operating in an isolated network, because the isolated network is not supported by a large power grid, the adverse factors such as intermittence and volatility existing in the power generation of the new energy power generation system are more prominent, and the energy storage becomes an important technology for eliminating the adverse factors.
The existing energy storage technology comprises forms of pumped storage, electrochemical energy storage, flywheel energy storage, solid gravity energy storage and the like, the pumped storage can be suitable for high-capacity energy storage, but the construction of pumped storage power stations requires the construction of the landform of a reservoir at high and low altitudes, so that the geographic resources capable of meeting the landform conditions are extremely limited, and the geographic resource requirements of ultra-large-scale energy storage required by energy transformation on station sites cannot be met at all; the electrochemical energy storage utilizes a secondary battery to realize the energy storage of redundant electric quantity, has good peak regulation performance, is limited by limited lithium resources and high battery cost, cannot meet the requirement of ultra-large-scale energy storage required by energy transformation, and is usually only provided for use in the range of 10 megawatts or lower; for flywheel energy storage, flywheel energy storage systems are typically limited to less than 10 megawatts due to physical size and structural material constraints.
The solid gravity energy storage has natural advantages in regions with more mountains by depending on the gravity energy storage of mountains, can be used for large-scale energy storage, can be used for storing energy by utilizing the fall height of the mountains during construction, can use the change of landform, can recycle the energy storage carrier, hardly causes pollution to the environment, and has good reliability and economy compared with other energy storage forms. However, the energy density of the solid gravity energy storage system is low, and in a theoretical case, when there is no power generation and friction loss, the power generation amount of the fixed gravity energy storage system is the change of the gravitational potential energy of the energy storage block, that is, the power generation amount is equal to the gravitational potential energy mg Δ h of the energy storage block according to 1 KWh-3.6 × 106J, namely the generated energy of 1 ton of heavy objects is 1KWh when the fall is 360 meters, according to the records in the publication of 'wind-solar-energy-storage-system multi-target-capacity optimization planning based on gravity energy storage, Liu Shi Jian, global energy Internet, volume 4, No. 5 and No. 9 months 2021', the energy conversion efficiency of gravity energy storage is more than 90%, so that the generated energy of 1 ton of heavy objects is 0.9KWh when the fall is 360 meters, and the energy density of visible solid gravity energy storage is relatively low, so that the energy density is 1KWhThe solid gravity energy storage system is generally built or used according to the local natural environment and forceful terrain, the height difference cannot be changed, and the specific weight of the energy storage block is increased to become the only means for increasing the total energy storage amount.
The invention patent CN102157951A discloses a solid gravity energy storage system using rail transportation, which uses a load unit descending on a rail to generate electricity, and uses electric network power to drive the load unit to ascend when the load unit ascends, so as to form conversion from electric energy to gravitational potential energy, however, the patent does not describe the loading and unloading of the load unit to the energy storage blocks, so that a plurality of energy storage cycles are completed, and a shuttle vehicle is usually configured for each energy storage block, thereby increasing the cost of the energy storage system; patent CN109072887A discloses a rail energy storage system, a hydraulic lifting mechanism is arranged on a shuttle car, and energy storage blocks can be loaded and unloaded by using the lifting mechanism at the elevation and low-range positions, however, because the energy density of a gravity energy storage system is low, the energy storage blocks usually weigh tens of tons or even hundreds of tons, the lifting mechanism is arranged in a limited space on the shuttle car, not only the weight of the shuttle car is increased, but also the shuttle car structure is redesigned according to the lifting mechanism, because the shuttle car chassis is provided with the lifting mechanism, the gravity center of the shuttle car chassis is raised, and the increase of energy storage cost due to the arrangement of a driving mechanism is not beneficial to the large-scale of the energy storage blocks; US 8593012B 2 discloses a rail energy storage device, wherein a lifting mechanism is arranged on the bottom of a shuttle car, when the rail energy storage device is loaded and unloaded, an energy storage block is lifted by the lifting mechanism, then a ring is rotated, and then the rail energy storage device is seated, so that the operation procedures are more, and the time consumption is longer when the energy storage block is loaded on the shuttle car; the invention patent CN113653612A discloses an energy storage system, wherein a travelling crane is used for hoisting energy storage blocks to realize the loading, unloading and stacking of the energy storage blocks, the travelling crane needs to go back and forth once from a shuttle to a stacking position in the process of completing the loading, unloading and stacking of one energy storage block, the operation efficiency is low, the weight maximization for limiting the energy storage speed is realized by hoisting the energy storage blocks by using the travelling crane, or the increase of the operation cost is brought when an expensive ultra-large travelling crane is used for hoisting the heavy energy storage blocks. The energy storage systems have certain defects, cannot output electric energy in time when the power grid emergency needs to generate electricity rapidly, and are limited to energy storage blocks with small using quality, so that the generated power, the total energy storage amount and the operation investment cost are increased compared with those of large-quality energy storage blocks.
Disclosure of Invention
The invention aims to solve the technical problems of high investment cost, low operation efficiency, low power generation power and the like of the current rail transportation energy storage system, and provides a novel rail transportation energy storage system which can use a large-mass energy storage block, so that when the power of a power grid is rich, for example, when the photovoltaic power generation power and the wind power generation power are high, or the load of the power grid is low at night, the surplus electric energy is converted into the gravitational potential energy of the energy storage block, and stable power is output outwards to inhibit the fluctuation of the output power of new energy sources, so that the purposes of peak clipping and valley filling are achieved, and the cost is low.
The rail transportation energy storage system is provided with a power generation mode and an energy storage mode, at least one rail extends from a bottom storage field to a top storage field, the altitude of the top storage field is higher than that of the bottom storage field, loading and unloading rails for storing energy storage blocks are arranged on the bottom storage field and the top storage field, a plurality of lifting mechanisms are uniformly distributed on two sides of each loading and unloading rail, and at least one shuttle vehicle can reciprocate between the bottom storage field and the top storage field; when the shuttle vehicle is in a power generation mode, the shuttle vehicle runs to the loading and unloading track of the top storage yard, the energy storage blocks are loaded on the shuttle vehicle through the lifting mechanism, the shuttle vehicle generates power through the motor device in the process of descending from the top storage yard to the bottom storage yard, and the energy storage blocks are unloaded by the lifting mechanism when the loading and unloading track of the bottom storage yard is reached; when the shuttle vehicle is in the energy storage mode, the shuttle vehicle runs to the loading and unloading track of the bottom storage yard, the energy storage blocks are loaded on the shuttle vehicle through the lifting mechanism, and the shuttle vehicle is driven by the driving device in the process of going up from the bottom storage yard to the top storage yard, so that the energy storage blocks are unloaded by the lifting mechanism when the shuttle vehicle runs to the loading and unloading track of the top storage yard. By arranging the lifting mechanisms on the two sides of the loading and unloading track, on one hand, the weight of the energy storage block can be increased, and meanwhile, the structure of the shuttle vehicle is simplified, and the mass center of the shuttle vehicle is reduced, so that the running stability of the shuttle vehicle in the processes of ascending and descending is realized, and the possibility of overturning of the shuttle vehicle in the running process of the track with a larger lift angle is reduced; on the other hand, through setting up the elevating system in the track both sides, store the field at bottom or the field is stored at the top, at the in-process of accomplishing an upper journey and lower journey, only need rise once and descend once of energy storage piece, very big improvement the loading time of shuttle, further improve rail transport energy storage system's generated power.
In one embodiment, the lifting mechanism comprises a support member, the support member only moves up and down, the rail transportation energy storage system comprises a control module, the control module controls the support member of the lifting mechanism to reciprocate up and down, the lifting mechanism can be a hydraulic mechanism, a screw rod and other common lifting mechanisms, when the shuttle car is in a power generation mode, the shuttle car runs to the loading and unloading rail of the top storage yard, the energy storage blocks are loaded on the shuttle car only by controlling the support member of the lifting mechanism to move down, and when the loading and unloading rail of the bottom storage yard is reached, the energy storage blocks are unloaded from the shuttle car only by controlling the support member of the lifting mechanism to move up.
In one embodiment, the lifting mechanism further comprises a locking structure, the locking structure can be used for locking the supporting piece, when unloading of the shuttle vehicle needs to be achieved, the control module drives the supporting piece in the lifting mechanism to ascend, after the energy storage block is pushed away from the shuttle vehicle, the locking of the supporting piece is achieved through the locking structure, the weight load of the lifting mechanism is reduced, the service life of the lifting mechanism is prolonged, and when the energy storage block needs to be loaded on the shuttle vehicle, the locking structure is controlled to be unlocked, the supporting piece is enabled to descend, and loading of the energy storage block is achieved.
In a preferred embodiment, the lifting mechanism is hydraulically driven, and comprises a fixing sleeve sleeved outside the supporting member, the supporting member slides up and down in the fixing sleeve, the locking structure comprises at least one locking pin, the locking structure is radially arranged in the supporting member, one end of the locking pin is connected with a spring, when the locking structure is in an unlocking state, the spring is under compression force, in a preferred technical scheme, when the energy storage block is heavy, the locking structure is provided with at least two locking pins, the two locking pins are oppositely arranged along the radial direction of the supporting member, the spring is arranged between the two locking pins, when the locking structure is in the unlocking state, the spring is under compression force, the fixing sleeve is provided with a locking hole corresponding to the locking pin, when the supporting member moves from bottom to top to a certain position, the locking pin is aligned with the locking hole, and the locking pin is inserted into the locking hole under the action of elastic force, the locking of the locking structure is realized.
When the locking structure needs to be unlocked, the locking pin is driven to withdraw from the locking hole into the supporting piece through the unlocking driving mechanism, for example, a permanent magnet is arranged at one end of the locking pin in an electromagnetic driving mode or a hydraulic driving mode, an electromagnet is arranged in the fixed sleeve or the supporting piece, when the locking structure needs to be unlocked, the electromagnet is controlled to be excited, the locking pin is attracted, and the locking pin is made to withdraw from the locking hole, so that the locking structure can be understood that when the electromagnet is arranged in the fixed sleeve, the electromagnet excitation generates repulsion force on the locking pin, and the locking mechanism is unlocked in the electromagnetic driving mode; or the other end of the locking hole of the fixed sleeve, which is opposite to the locking pin, is connected with a hydraulic pipeline, when the locking mechanism needs to be unlocked, the hydraulic pipeline is controlled to provide high-pressure oil for the locking hole, so that the locking pin is withdrawn from the locking hole, and the locking mechanism is unlocked in a hydraulic driving mode.
In one embodiment, the energy storage block is provided with a reinforcing member at the joint position of the bottom of the energy storage block and the support member, the reinforcing member is an elongated metal plate, the energy storage block can be formed by one or more of a reinforced concrete structure, a stone block, construction waste and compacted rammed earth, and is not limited to the above materials, the energy storage block can be formed by materials with high density and low price, and the weight of the energy storage block can be more than or equal to 5 tons, preferably 50 tons, 100 tons, 150 tons, 200 tons, 250 tons and 300 tons, in order to improve the power generation capacity.
In one embodiment, the energy storage block is formed by reinforced concrete into a peripheral structure, a cavity is formed in the peripheral structure, the cavity is filled with materials such as compacted ramming earth and/or stones, the energy storage block can be formed by stacking a plurality of sub energy storage blocks in a sheet shape, a strip shape or a block shape, and the plurality of sub energy storage blocks are connected into a whole through a connecting device. The energy storage blocks are arranged to have different heights for the tracks with different lead angles, for example, when the track with the lead angle of 60 degrees is used, the height of the energy storage block is smaller than that of the energy storage block when the track with the lead angle of 40 degrees is used for mainly reducing the gravity center of the shuttle car and preventing the shuttle car from overturning during operation.
In one specific implementation, the motor device is arranged on each shuttle car, the motor device is connected with the transmission, the first gear of the wheel shaft connected with the wheels of the shuttle car is meshed with the input end of the transmission, the speed is increased through the transmission, the rotating speed higher than the rotating speed of the wheel shaft is output, and the generator is driven to operate and generate power. According to different lead angles of the tracks, a second gear can be arranged on a wheel shaft provided with the first gear, a fixed rack is arranged, and the second gear is matched with the rack to prevent the efficiency of the motor device from being reduced due to wheel slip when the tracks have larger lead angles or the tracks cover ice, so that the situation that the efficiency of the motor device is reduced due to wheel slip can be understood that a chain wheel and a chain mechanism can be arranged to replace the second gear and the rack; preferably, the second gear is arranged at the position of a middle axle or a rear axle of the shuttle vehicle in the process of descending, so that the possibility of overturning of the shuttle vehicle is reduced; it should be understood that in a smaller lead angle orbit, a second rack and pinion configuration or a second gear and chain mechanism need not be provided; the motor device has functions of a generator and a motor, and is driven to generate electricity during the lower stroke, and forms a driving device by the motor device with the function of the motor during the upper stroke to drive the shuttle vehicle to move to the top storage field; it will be appreciated that the drive means may also be a motor-driven winch mounted in the overhead storage area and using a cable to pull the shuttle car for the upstroke.
In one embodiment, the shuttle cars can be operated in groups according to the load requirements of a power grid, and flexible combination of generated power can be realized by using 2 or 3 groups; when the rail transportation energy storage system is provided with a small number of shuttles, the shuttles can carry out the upward journey in a no-load mode after the energy storage blocks are unloaded from the bottom storage yard in the power generation mode, and the shuttles can carry out the downward journey in a no-load mode after the energy storage blocks are unloaded from the top storage yard in the energy storage mode, so that the continuous energy storage and power generation can be carried out under the condition that the shuttles are arranged in a small size.
The invention has the advantages that the weight of the energy storage block is improved with the lowest cost, the total energy storage amount and the power generation power of the energy storage system are increased, the operation efficiency of the energy storage system is improved, the power generation power output of the energy storage system can be quickly realized when the power grid needs the output power of the energy storage system, and the quick response capability of the energy storage system is improved; compared with other energy storage modes, the energy storage system has the characteristics of long service life and the like, can realize long-term energy storage operation only through simple maintenance, reduces the power consumption cost in the energy storage process, has great significance for energy conservation, emission reduction and realization of carbon peak reaching and carbon neutralization in advance, and has high energy circulation efficiency, low operation cost, remarkable economic benefit and huge social benefit.
Drawings
FIG. 1 is a schematic view of a rail transport energy storage system of the present invention;
FIG. 2 is a partial cross-sectional view of the lift mechanism;
FIG. 3 is a schematic view of a shuttle unloading energy storage block;
FIG. 4 is a schematic view of the shuttle positioned on the loading track to load the energy storage blocks;
FIG. 5 is a schematic diagram of a combined energy storage block;
fig. 6 is a partial structural schematic view of the shuttle provided with the second gear.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples. The rail transportation energy storage system of the invention has a power generation mode and an energy storage mode, wherein, fig. 1 is a simplified diagram of the rail transportation energy storage system of the invention, at least one rail 3 extends from a bottom storage field 2 to a top storage field 1, the altitude of the top storage field 1 is higher than the altitude of the bottom storage field 2, loading and unloading rails 4 for storing energy storage blocks are arranged on the bottom storage field 2 and the top storage field 1, a plurality of lifting mechanisms 5 are evenly distributed on two sides of each loading and unloading rail 4, and at least one shuttle car 6 can reciprocate between the bottom storage field 2 and the top storage field 1; when the shuttle car 6 is in a power generation mode, the shuttle car 6 runs to a loading and unloading track of the top storage yard 1, the energy storage block 7 is loaded on the shuttle car 6 through the lifting mechanism 5, the shuttle car 6 generates power through the motor device in the process of descending from the top storage yard 1 to the bottom storage yard 2, and the energy storage block 7 is unloaded by the lifting mechanism 5 when reaching the loading and unloading track 4 of the bottom storage yard 2; when the shuttle car 6 is in the energy storage mode, the shuttle car 6 runs to the loading and unloading track 4 of the bottom storage yard 2, the energy storage block 7 is loaded on the shuttle car 6 through the lifting mechanism 5, and the shuttle car 6 is driven by the driving device in the process of going up from the bottom storage yard 2 to the top storage yard 1, so that the energy storage block 7 is unloaded by the lifting mechanism 5 when the shuttle car 6 runs to the loading and unloading track of the top storage yard 1. By arranging the lifting mechanisms 5 on the two sides of the loading and unloading track 4, on one hand, the weight of the energy storage block 7 can be increased, the structure of the shuttle car 6 is simplified, and the mass center of the shuttle car 6 is reduced, so that the running stability of the shuttle car 6 in the processes of upper and lower strokes is realized, and the possibility of overturning of the shuttle car 6 in the running process of the track with a large lift angle is reduced; on the other hand, through the lifting mechanisms 5 arranged on the two sides of the rail, the storage field 2 at the bottom or the storage field 1 at the top is adopted, and only one time of rising and one time of falling of the energy storage block 7 are needed in the process of completing one upper journey and one lower journey, so that the loading time of the shuttle car 6 is greatly prolonged, and the power generation power of the rail transportation energy storage system is further improved.
In one embodiment, the lifting mechanism 5 comprises a support 51, the support 51 only moves up and down, the energy storage system for rail transportation comprises a control module, the control module controls the support of the lifting mechanism to reciprocate up and down, the lifting mechanism 5 can be a common lifting mechanism such as a hydraulic mechanism and a screw, when the shuttle car 6 is in a power generation mode, the shuttle car 6 moves to the loading and unloading track of the top storage yard, the energy storage blocks 7 are loaded on the shuttle car 6 only by controlling the support 51 of the lifting mechanism to move down, and when the loading and unloading track 4 of the bottom storage yard 2 is reached, the energy storage blocks 7 are unloaded from the shuttle car 6 only by controlling the support 51 of the lifting mechanism 5 to move up.
Fig. 2 is a partial sectional view of the lifting mechanism 5, the lifting mechanism further includes a locking structure 52 capable of locking the support member 51, fig. 3 is a schematic view of unloading the energy storage blocks of the shuttle vehicle, fig. 4 is a schematic view of loading the energy storage blocks on a loading track of the shuttle vehicle, for convenience of observation, fig. 3 and fig. 4 do not show the loading track 4, when the unloading of the shuttle vehicle 6 needs to be realized, the control module drives the support member 51 in the lifting mechanism to ascend, and after the energy storage blocks 7 are ejected from the shuttle vehicle 6, the locking of the support member 51 is realized through the locking structure 52, the weight load of the lifting mechanism 5 is reduced, the service life of the lifting mechanism 5 is prolonged, and when the energy storage blocks need to be loaded on the shuttle vehicle 6, the locking structure 52 is controlled to unlock, so that the support member 51 descends, and the loading of the energy storage blocks is realized.
In a preferred embodiment, the lifting mechanism 5 is hydraulically driven, and includes a fixed sleeve 53 sleeved outside the supporting member 51, the supporting member 51 slides up and down in the fixed sleeve 53, the locking structure 52 includes at least one locking pin 521, the locking structure 52 is radially disposed in the supporting member 51, one end of the locking pin 521 is connected with an elastic member 522, when the locking structure 52 is in an unlocked state, the elastic member 522 is under a compression force, in a preferred embodiment, when the energy storage block 7 is heavy, the locking structure has at least two locking pins 521, the two locking pins are disposed opposite to each other in the radial direction of the supporting member, an elastic member 522 is disposed between the two locking pins 521, when the locking structure 52 is in an unlocked state, the elastic member 522 is under a compression force, a locking hole 531 corresponding to the locking pin 521 is disposed on the fixed sleeve 53, when the supporting member 51 moves from bottom to top to a position, the locking pin 521 is aligned with the locking hole 531, and the locking pin 521 is inserted into the locking hole 531 under the action of elastic force, so that the locking structure 52 is locked. The elastic member 522 may be a coil spring or a leaf spring.
Further, when the locking structure 52 needs to be unlocked, the locking pin 521 is driven by the unlocking driving mechanism to exit from the locking hole 531 to the supporting member 51, for example, by an electromagnetic driving mode or a hydraulic driving mode, a permanent magnet is disposed at one end of the locking pin 521, an electromagnet is disposed in the fixed sleeve 53 or the supporting member 51, when unlocking is needed, the electromagnet is controlled to be excited, the locking pin 521 is attracted, and the locking pin 521 exits from the locking hole 531, it can be understood that, when the electromagnet is disposed in the fixed sleeve 53, repulsion is generated on the locking pin 521 by the excitation of the electromagnet, so that the locking mechanism 52 is unlocked by the electromagnetic driving mode; or a hydraulic pipeline is connected to the other end, opposite to the locking pin 521, of the locking hole 531 of the fixed sleeve 53, a high-pressure oil source is communicated through the hydraulic pipeline 54, and when unlocking is required, the hydraulic pipeline 54 is controlled to provide high-pressure oil to the locking hole 531, so that the locking pin 521 is withdrawn from the locking hole 531, and the locking mechanism is unlocked in a hydraulic driving mode.
In one embodiment, a reinforcing component is arranged at the joint position of the bottom of the energy storage block 7 and the support 51, the reinforcing component is an elongated metal plate 8, the metal plate 8 protrudes out of the bottom surface of the energy storage block 7, and when the energy storage block 7 is loaded on the shuttle car 6, the side surface of the metal plate 8 contacts with the side surface of the shuttle car 6 to limit the energy storage block 7; the energy storage block 7 may be formed of one or more of a reinforced concrete structure, a stone block, a construction waste, and compacted rammed earth, and is not limited to the above materials, and may be formed of a material having a high density and a low price, and in order to increase the power generation capacity, the weight of the energy storage block may be greater than or equal to 5 tons, preferably 50 tons, 100 tons, 150 tons, 200 tons, 250 tons, and 300 tons. According to the designed weight of the energy storage blocks 7, the number of the lifting mechanisms 5 for supporting each energy storage block 7 can be adjusted, the number of the lifting mechanisms corresponding to each energy storage block 7 is more than or equal to 2, and the number of the lifting mechanisms is preferably 3, 4, 5, 6, 7 or 8.
In one embodiment, referring to fig. 5, the energy storage block 7 is formed by combining two sub energy storage blocks 7 ', the two sub energy storage blocks 7 ' are connected into a whole by the connection device 73, and the energy storage block 7 may also be formed by stacking a plurality of sub energy storage blocks 7 ' in a sheet, strip, block shape, or by forming the energy storage block 7 by a whole structure; the energy storage block 7 or the sub energy storage block 7' is formed by reinforced concrete into an outer peripheral structure 71, a cavity 72 is formed in the outer peripheral structure 71, and materials such as compacted rammed earth, stones and construction waste are filled in the cavity 72. It can be understood that the energy storage blocks with different weights and different shapes can be combined according to the power utilization requirement and the power generation requirement, so that the required power generation is met. The energy storage blocks are arranged to have different heights for the tracks with different lead angles, for example, when the track with the lead angle of 60 degrees is used, the height of the energy storage block is smaller than that of the energy storage block when the track with the lead angle of 40 degrees is used for mainly reducing the gravity center of the shuttle car and preventing the shuttle car from overturning during operation.
In one embodiment, the motor device is disposed on each shuttle car 6, the motor device is connected with the transmission, the first gear of the wheel shaft connected with the wheels of the shuttle car 6 is meshed with the input end of the transmission, the first gear is accelerated by the transmission, the rotating speed higher than the rotating speed of the wheel shaft is output, and the generator is driven to operate and generate power. According to the lead angle of the track, a second gear 62 can be arranged on the wheel shaft 61 provided with the first gear, a fixed rack 63 is arranged, and the second gear 62 and the rack 63 are matched as shown in fig. 6, so that the efficiency reduction of the motor device caused by wheel slip when the track is at a large lead angle or the track covers ice is prevented; preferably, the second gear is arranged at the position of a middle axle or a rear axle of the shuttle vehicle in the process of descending, so that the possibility of overturning of the shuttle vehicle is reduced; it should be understood that in a smaller lead angle orbit, a second rack and pinion configuration or a second gear and chain mechanism need not be provided; the motor device has functions of a generator and a motor, and is driven to generate electricity during the lower stroke, and forms a driving device by the motor device with the function of the motor during the upper stroke to drive the shuttle vehicle to move to the top storage field; it will be appreciated that the drive means may also be a motor-driven winch mounted in the overhead storage area and using a cable to pull the shuttle car for the upstroke.
In one embodiment, the shuttle cars can be operated in groups according to the load requirements of a power grid, and flexible combination of generated power can be realized by using 2 or 3 groups; when the rail transportation energy storage system is provided with a small number of shuttles, the shuttles can carry out the upward journey in a no-load mode after the energy storage blocks are unloaded from the bottom storage yard in the power generation mode, and the shuttles can carry out the downward journey in a no-load mode after the energy storage blocks are unloaded from the top storage yard in the energy storage mode, so that the continuous energy storage and power generation can be carried out under the condition that the shuttles are arranged in a small size.
The working method of the energy storage system in the application is that when the load of a power grid is low or the price of electricity of the power grid is low, the shuttle car 6 is made to run to the loading track 4 of the bottom storage yard 2, the locking structure 52 is controlled to unlock, the energy storage block 7 is made to descend and be seated on the shuttle car 6, the energy storage block 7 is loaded on the shuttle car 6, the shuttle car 6 is driven by the driving device to move upwards, and when the shuttle car 6 runs to the loading and unloading track 4 of the top storage yard 1, the energy storage block is unloaded by the lifting mechanism 5;
when the load of the power grid is high or the electricity price of the power grid is high, the shuttle car 6 is made to run to the loading track 4 of the top storage yard 1, the locking structure 52 is controlled to unlock, the energy storage block 7 is made to descend to be seated on the shuttle car 6, the energy storage block 7 is loaded on the shuttle car 6, the shuttle car 6 performs a downward stroke to generate electricity through the motor device to supply power to the power grid, and when the shuttle car 6 runs to the loading and unloading track 4 of the bottom storage yard 2, the energy storage block is unloaded by the lifting mechanism 5. A position sensor is arranged at a position corresponding to each energy storage block 7, and the shuttle car 6 is controlled to stop below the energy storage block 7 according to the specific position of the shuttle car 6 detected by the position sensor, so that the energy storage blocks can be loaded on or unloaded from the shuttle car only by lifting movement, the loading efficiency of the energy storage blocks is improved, and the response performance of an energy storage system is further improved.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims appended hereto.
Claims (10)
1. A rail transportation energy storage system is provided with a power generation mode and an energy storage mode, wherein at least one rail extends from a bottom storage field to a top storage field, the altitude of the top storage field is higher than the altitude of the bottom storage field, loading and unloading rails for storing a plurality of energy storage blocks are arranged in the bottom storage field and the top storage field, a plurality of lifting mechanisms are uniformly distributed on two sides of each loading and unloading rail, and at least one shuttle vehicle can reciprocate between the bottom storage field and the top storage field; when the shuttle vehicle is in a power generation mode, the shuttle vehicle runs to the loading and unloading track of the top storage yard, the energy storage blocks are loaded on the shuttle vehicle through the lifting mechanism, the shuttle vehicle generates power through the motor device in the process of descending from the top storage yard to the bottom storage yard, and the energy storage blocks are unloaded by the lifting mechanism when the loading and unloading track of the bottom storage yard is reached; when the shuttle vehicle is in the energy storage mode, the shuttle vehicle runs to the loading and unloading track of the bottom storage yard, the energy storage blocks are loaded on the shuttle vehicle through the lifting mechanism, and the shuttle vehicle is driven by the driving device in the process of going up from the bottom storage yard to the top storage yard, so that the energy storage blocks are unloaded by the lifting mechanism when the shuttle vehicle runs to the loading and unloading track of the top storage yard.
2. The energy storage system for rail transportation of claim 1, wherein the lifting mechanism comprises a support member, the support member moves only up and down, the energy storage system for rail transportation comprises a control module, the control module controls the support member of the lifting mechanism to reciprocate up and down, when the shuttle vehicle is in the power generation mode, the shuttle vehicle moves to the loading and unloading track of the top storage yard, the energy storage blocks are loaded on the shuttle vehicle only by controlling the support member of the lifting mechanism to move down, and when the loading and unloading track of the bottom storage yard is reached, the energy storage blocks are unloaded from the shuttle vehicle only by controlling the support member of the lifting mechanism to move up.
3. The energy storage system for rail transportation according to claim 1, wherein the lifting mechanism further comprises a locking structure, so that the support member can be locked, when the shuttle vehicle needs to be unloaded, the control module drives the support member in the lifting mechanism to ascend, and after the energy storage block is ejected away from the shuttle vehicle, the support member is locked through the locking structure; when the energy storage blocks need to be loaded on the shuttle, the locking structure is controlled to be unlocked, the supporting piece is made to descend, and the loading of the energy storage blocks is achieved.
4. The energy storage system for rail transportation of claim 1, wherein the lifting mechanism is hydraulically driven, and comprises a fixed sleeve sleeved outside the supporting member, the supporting member slides up and down in the fixed sleeve, the locking structure comprises at least one locking pin, the locking structure is radially arranged in the supporting member, one end of the locking pin is connected with an elastic member, and when the locking structure is in an unlocked state, the elastic member is under a compression force; the locking hole corresponding to the locking pin is formed in the fixing sleeve, when the supporting piece moves to a certain position from bottom to top, the locking pin is aligned with the locking hole, and the locking pin is inserted into the locking hole under the action of elastic force, so that locking of the locking structure is achieved.
5. The energy storage system of claim 1, wherein the energy storage blocks are provided with reinforcement members at locations where the bottom of the energy storage blocks engage the support members, and the energy storage blocks may be formed of one or more of reinforced concrete structures, rock, construction waste, compacted rammed earth.
6. The energy storage system of claim 1, wherein the energy storage blocks are formed of reinforced concrete into a perimeter structure, a cavity is formed within the perimeter structure, and the cavity is filled with one or more of compacted rammed earth, rock, and construction waste.
7. The energy storage system for rail transportation of claim 1, wherein the energy storage block is formed by stacking sub energy storage blocks in a sheet shape, a strip shape or a block shape, and the sub energy storage blocks are integrally connected by a connecting device.
8. The energy storage system for rail transportation of claim 1, wherein the motor device is arranged on each shuttle car, the motor device is connected with the transmission, a first gear arranged on a wheel shaft connected with wheels of the shuttle car is meshed with the input end of the transmission, a second gear is arranged on the wheel shaft provided with the first gear, a fixed rack is arranged, and the wheels are prevented from slipping through the cooperation of the second gear and the rack.
9. An operation method of the energy storage system for rail transportation according to any one of claims 1 to 8, characterized in that when the load of the power grid is low or the price of the power grid is low, the shuttle car 6 is operated to the loading track 4 of the bottom storage yard 2, the locking structure 52 is controlled to be unlocked, the energy storage blocks 7 are descended and seated on the shuttle car 6, the energy storage blocks 7 are loaded on the shuttle car 6, the shuttle car 6 is driven to move upwards by the driving device, and when the shuttle car 6 is operated to the loading and unloading track 4 of the top storage yard 1, the energy storage blocks are unloaded by the lifting mechanism 5;
when the load of the power grid is high or the electricity price of the power grid is high, the shuttle car 6 is made to run to the loading track 4 of the top storage yard 1, the locking structure 52 is controlled to unlock, the energy storage block 7 is made to descend to be seated on the shuttle car 6, the energy storage block 7 is loaded on the shuttle car 6, the shuttle car 6 performs a downward stroke to generate electricity through the motor device to supply power to the power grid, and when the shuttle car 6 runs to the loading and unloading track 4 of the bottom storage yard 2, the energy storage block is unloaded by the lifting mechanism 5.
10. The method of claim 9, wherein the shuttle cars are operable in a consist according to grid load requirements, and wherein a plurality of the shuttle cars are utilized to form a consist to achieve a flexible combination of generated power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482313.1A CN113978489B (en) | 2021-12-07 | 2021-12-07 | Rail transportation energy storage system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482313.1A CN113978489B (en) | 2021-12-07 | 2021-12-07 | Rail transportation energy storage system and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113978489A true CN113978489A (en) | 2022-01-28 |
| CN113978489B CN113978489B (en) | 2022-09-30 |
Family
ID=79733357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111482313.1A Active CN113978489B (en) | 2021-12-07 | 2021-12-07 | Rail transportation energy storage system and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113978489B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378323A (en) * | 2001-04-05 | 2002-11-06 | 孟震峰 | Device for storage electric energy |
| CN102498023A (en) * | 2009-08-11 | 2012-06-13 | 艾德万斯得瑞尔能量储备有限公司 | Utility scale electric energy storage system |
| US20130043721A1 (en) * | 2011-08-16 | 2013-02-21 | Advanced Rail Energy Storage, Llc | Rail Based Potential Energy Storage For Utility Grid Ancillary Services |
| WO2013050343A2 (en) * | 2011-10-03 | 2013-04-11 | GEORGITZIKI, Elpida | Method and system for storage and recovery of electrical energy |
| WO2017151512A1 (en) * | 2016-02-29 | 2017-09-08 | Advanced Rail Energy Storage, L.L.C. | Ridgeline cable drive electric energy storage system |
| CN111532811A (en) * | 2020-05-18 | 2020-08-14 | 中铁第四勘察设计院集团有限公司 | Container alignment synchronous loading and unloading method and system based on prestoring |
-
2021
- 2021-12-07 CN CN202111482313.1A patent/CN113978489B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1378323A (en) * | 2001-04-05 | 2002-11-06 | 孟震峰 | Device for storage electric energy |
| CN102498023A (en) * | 2009-08-11 | 2012-06-13 | 艾德万斯得瑞尔能量储备有限公司 | Utility scale electric energy storage system |
| US20130043721A1 (en) * | 2011-08-16 | 2013-02-21 | Advanced Rail Energy Storage, Llc | Rail Based Potential Energy Storage For Utility Grid Ancillary Services |
| WO2013050343A2 (en) * | 2011-10-03 | 2013-04-11 | GEORGITZIKI, Elpida | Method and system for storage and recovery of electrical energy |
| WO2017151512A1 (en) * | 2016-02-29 | 2017-09-08 | Advanced Rail Energy Storage, L.L.C. | Ridgeline cable drive electric energy storage system |
| CN111532811A (en) * | 2020-05-18 | 2020-08-14 | 中铁第四勘察设计院集团有限公司 | Container alignment synchronous loading and unloading method and system based on prestoring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113978489B (en) | 2022-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2699855C1 (en) | Industrial energy storage system | |
| US9745963B2 (en) | Energy weight storage | |
| CN101590982A (en) | Wind power generation climbing hoisting crane | |
| DE10037678A1 (en) | Mechanical lift storage mechanism has solid matter or loose/liquid matter in containers that is raised; the energy expended to is recovered by lowering same mass, using electric generators | |
| CN113653612A (en) | Solid gravity flow carrying equipment, gravity energy storage element and energy storage system | |
| CN211666853U (en) | Gravity energy storage system depending on high tower | |
| CN111287918A (en) | Gradient gravity energy storage system for waste shaft waste rock of post-mining | |
| CN114151296A (en) | Gravity energy storage system based on efficient lifting and transferring of multiple objects | |
| CN113978489B (en) | Rail transportation energy storage system and operation method thereof | |
| CN115013266B (en) | Control method of matrix type gravity energy storage system | |
| CN113027712A (en) | Solid gravity flow carrying equipment and energy storage system | |
| CN114194981A (en) | Road traffic transportation and electric power energy storage system based on heavy-duty automobile lifting | |
| CN216044213U (en) | Solid gravity flow carrying equipment, gravity energy storage element and energy storage system | |
| CN113417817A (en) | Solid gravity flow carrying equipment and energy storage system | |
| CN114704445B (en) | Gravity energy storage module and modularized gravity energy storage system | |
| RU2796715C1 (en) | Gravitational storage of electric energy | |
| CN113895467B (en) | Gravity energy storage system for transporting sand by depending on track and cable car | |
| CN217590379U (en) | Vertical shaft gravity energy storage device with underground space arranged in multiple layers | |
| Chen | Types, applications and future developments of gravity energy storage | |
| CN216121813U (en) | Gravity steel ball displacement type automatic energy storage power station | |
| CN116792269A (en) | Gravity energy storage and stable power generation system | |
| CN221096737U (en) | Novel gravity energy storage system | |
| CN212454709U (en) | Intelligent automatic lever type energy storage power station | |
| WO2023239264A1 (en) | Gravitational energy storage system | |
| US20240093675A1 (en) | Power Generating Device Using Free Falling of Object Due to Gravity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231017 Address after: 714000 Group 4, Zhangjiawa Village, Fengyuan Town, Chengcheng County, Weinan City, Shaanxi Province Patentee after: Wang Bo Address before: 710000 No. 429, group 6, Zhoujiazhuang village, Guodu Street office, Chang'an District, Xi'an City, Shaanxi Province Patentee before: Xi'an huajixiang Trading Co.,Ltd. |