Light-storage direct-flexible building system based on slope type gravity energy storage and operation method of light-storage direct-flexible building system

Abstract

The invention provides a light storage direct-flexible building system based on slope type gravity energy storage and an operation method of the light storage direct-flexible building system, and relates to the technical field of light storage direct-flexible building systems. The structure comprises a building main body, an upper empty space, a lower empty space, a slope channel, a weight block, a slope transmission system, an AGV and the like. The system can drive a plurality of weight blocks at the same time so as to provide continuous power generation capacity; the number of weight blocks participating in power generation can be adjusted in real time according to load requirements, weight blocks with different masses can be used, and the output capacity of the system can be adjusted by using the weight blocks with different masses. By adopting the system provided by the invention, the electric energy can be efficiently utilized to the maximum extent under the operation method provided by the invention.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic-storage-direct-flexible building systems, and in particular to a photovoltaic-storage-direct-flexible building system based on slope-type gravity energy storage and an operation method thereof. Background Art

[0002] "PV-storage-direct-flexible" refers to the construction of a new building distribution system (or building energy system) that meets the needs of carbon neutrality goals through photovoltaic power generation, energy storage, DC power distribution and flexible energy use. Its ultimate goal is to achieve flexible energy use of the entire building, so that the building is transformed from a mere load in the traditional energy system to a complex with the "three-in-one" functions of renewable energy production, self-energy use, and energy storage in the entire energy system in the future, so as to realize the on-site consumption of renewable energy.

[0003] The "storage" in the photovoltaic storage direct flexible refers to the electric energy storage system. Since renewable energy generation, mainly based on wind and solar power, has the disadvantages of randomness, volatility and intermittency, the use of a reasonable energy storage system can largely solve this problem. The current energy storage technology can be roughly divided into four categories, including chemical energy storage (such as lithium-ion batteries, lead-acid batteries, all-vanadium liquid flow batteries, etc.), electrophysical energy storage (such as superconducting magnetic energy storage, supercapacitors, etc.), mechanical physical energy storage (such as pumped storage, compressed air energy storage, flywheel energy storage, etc.) and other forms of energy storage (such as disguised energy storage, hydrogen energy storage, etc.). Among them, gravity energy storage in mechanical energy storage, as an emerging form of energy storage, has the advantages of pure physical energy storage, environmental friendliness, strong environmental adaptability, long cycle life of energy storage power generation, low cost, large capacity, long energy storage time and no self-discharge problems. The principle of gravity energy storage is to raise and lower the energy storage medium based on the height difference to realize the charging and discharging of the energy storage system.

[0004] The prior art proposes a design for applying a vertical gravity energy storage system to buildings, but this technology has the following technical problems: (1) Discontinuous power generation. The discontinuous power generation problem of the vertical gravity energy storage system is mainly manifested in the interval between the actual falling power generation and the no-load rising. During this process, the system cannot provide continuous power output.

[0005] (2) Real-time load matching problem. During a single power generation process, the weight of the heavy object is fixed, so the power generation is also fixed and cannot be dynamically adjusted according to actual load demand. Summary of the invention

[0006] The present invention provides a photovoltaic storage direct-flexible building system based on slope-type gravity energy storage, aiming to solve the problems of discontinuous power generation and inability to achieve real-time load matching in related research of existing gravity energy storage systems.

[0007] The present invention provides the following technical solutions to achieve the above objectives: A photovoltaic storage direct-flexible building system based on slope-type gravity energy storage comprises a building body and a power grid; comprises a photovoltaic power generation system electrically connected to the power grid and arranged on the top of the building body, and an internal slope gravity energy storage system; the slope gravity energy storage system comprises an upper overhead layer arranged in the building body, a lower overhead layer with a height lower than the upper overhead layer, and a slope passage arranged on the side of the building body, a slope transmission system is arranged in the slope passage, heavy object block passages are arranged at the bottom of the upper overhead layer and the top of the lower overhead layer respectively corresponding to the two ends of the slope passage, and a plurality of heavy object blocks and AGV trolleys are respectively arranged in the upper overhead layer and the lower overhead layer.

[0008] The aforementioned photovoltaic storage direct-flexible building system based on slope gravity energy storage is characterized in that the steps of energy storage in the slope gravity energy storage system include: the AGV cart in the lower overhead layer grabs the heavy blocks and places them on the slope transmission system; the slope transmission system receives external power supply and transports the heavy blocks upward; the AGV cart in the upper overhead layer grabs the heavy blocks transported up by the slope transmission system and transports and stacks them.

[0009] In the aforementioned photovoltaic storage direct-flexible building system based on slope gravity energy storage, the steps for the slope gravity energy storage system to generate electricity include: the AGV cart in the upper overhead layer grabs the heavy blocks and transports them to be placed on the slope transmission system; relying on the gravity potential energy of the heavy blocks themselves, the slope transmission system will transport them downward to the lower overhead layer, and the AGV cart in the lower overhead layer grabs the heavy blocks transported down by the slope transmission system and transports and stacks them; during the descent of the heavy blocks, the generator connected to the drive and slope transmission system works, and the generated electric energy is converted and input into the power grid.

[0010] In the aforementioned photovoltaic storage direct-flexible building system based on slope-type gravity energy storage, a turning area is provided in the upper overhead layer and the lower overhead layer for the docking and transportation of heavy objects.

[0011] In the aforementioned solar-storage direct-flexible building system based on slope-type gravity energy storage, a groove is provided on the top of the weight block and a protrusion is provided on the bottom.

[0012] An operating method of the aforementioned photovoltaic storage direct-flexible building system based on slope-type gravity energy storage comprises the following steps: S1: Photovoltaic power supply. When the photovoltaic power generation generated by the photovoltaic power generation system 9 can meet the building load demand, the photovoltaic power is directly supplied to the building load to achieve photovoltaic self-consumption; S2: Powered by photovoltaic and slope gravity energy storage system. When photovoltaic power generation is insufficient to meet the building load demand, the insufficient power consumption of the building is supplemented by the slope gravity energy storage system. S3: The photovoltaic, slope gravity energy storage system and the power grid provide power supply. When the photovoltaic and slope gravity energy storage systems are insufficient to meet the building load demand, the power grid will supply the insufficient power for the building. S4: Utilize photovoltaic energy storage. When there is excess power from photovoltaic power generation to supply building loads, the excess power is supplied to the slope gravity energy storage system for energy storage. S5: Excess photovoltaic power is connected to the grid. When there is excess power from photovoltaic power generation to supply building loads, the excess power is supplied to the slope gravity energy storage system for storage, and the subsequent excess power is injected into the grid.

[0013] In the aforementioned operation method of the photovoltaic storage direct-flexible building system based on slope gravity energy storage, when the slope gravity energy storage system is powered, the increase in grid load is first detected through the power demand sensor, and the data analysis system predicts the required increase in power output in the future time period; the control system of the slope gravity energy storage system matches the power generation that can be generated by the weight block with the required increase in power output, and selects the appropriate weight block for scheduling.

[0014] Compared with the prior art, the present invention constructs a photovoltaic storage direct-flexible building system based on slope-type gravity energy storage, and designs its operation strategy and the implementation method of real-time matching of heavy blocks with power loads, which has the following advantages: 1. The present invention solves the problem of discontinuous power generation caused by a single weight block in a vertical system. The slope gravity energy storage system proposed by the present invention can drive multiple weight blocks at the same time, and use gravity to drive them down to release the stored energy. It can drive multiple weight blocks at the same time to provide continuous power generation capacity. The design proposed by the present invention solves the limitations of a single weight block in a vertical system and ensures a continuous supply of energy.

[0015] 2. Different loads may have different energy requirements. The sloped gravity energy storage system proposed by the present invention can adjust the number of weight blocks involved in power generation and use weight blocks of different masses in real time according to the load requirements, and can use weight blocks of different masses to adjust the output capacity of the system. This flexibility enables the present invention to better adapt to different load requirements and improve the adjustability and reliability of energy supply.

[0016] 3. The present invention proposes five operation strategies for the system, namely (1) photovoltaic power supply; (2) photovoltaic and slope gravity energy storage system power supply; (3) photovoltaic, slope gravity energy storage system and power grid three-party power supply; (4) photovoltaic energy storage and (5) excess photovoltaic power access to the grid. Under these operation methods, electric energy can be used efficiently to the maximum extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below only relate to some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of the photovoltaic storage direct-flexible building system based on slope-type gravity energy storage of the present invention; Figure 2 It is a side view structural schematic diagram of the photovoltaic storage direct-flexible building system based on slope-type gravity energy storage of the present invention; Figure 3 This is a schematic diagram of the top view of the overhead layer of the present invention; Figure 4 It is a schematic diagram of the stacking structure of heavy object blocks of the present invention; Figure 5 This is a brief operation flow chart of the solar-storage direct-flexible building system based on slope-type gravity energy storage of the present invention; Figure numbers: 1-building body, 2-upper overhead layer, 3-lower overhead layer, 4-ramp passage, 5-weight block, 6-ramp transmission system, 7-AGV trolley, 8-weight block passage, 9-photovoltaic power generation system, 10-power grid, 11-rotation area, 12-motor / generator, 13-building load, 14-stacking area. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] It should be noted that in the present invention: the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly for better describing the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have specific orientations, or to be constructed and operated in specific orientations; the terms "installed", "set", "provided with", "connected", "connected", "sleeved" and the like should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. In addition, some terms may be used to express other meanings in addition to indicating a direction or position relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0021] Embodiment. A photovoltaic storage direct flexible building system based on slope gravity energy storage, the structure of which is referenced Figure 1-4 As shown, it includes a building body 1 and a power grid 10; includes a photovoltaic power generation system 9 electrically connected to the power grid 10 and arranged on the top of the building body 1, and an internal slope gravity energy storage system; the slope gravity energy storage system includes an upper overhead layer 2 arranged in the building body 1, a lower overhead layer 3 with a height lower than the upper overhead layer 2, and a slope channel 4 arranged on the side of the building body 1, a slope transmission system 6 is arranged in the slope channel 4, and weight block channels 8 are arranged at the bottom of the upper overhead layer 2 and the top of the lower overhead layer 3 respectively corresponding to the two ends of the slope channel 4, and a plurality of weight blocks 5 and AGV trolleys 7 are respectively arranged in the upper overhead layer 2 and the lower overhead layer 3; it also includes a control system for regulating the slope gravity energy storage system, and the control system comprehensively dispatches various parts of the equipment to realize the full automatic operation of the system.

[0022] The bottom of the upper overhead layer 2 and the lower overhead layer 3 are used as heavy object stacking areas; the heavy object block passage 8 meets the requirements of the up and down transportation of the heavy object blocks 5; The upper overhead layer 2 and the lower overhead layer 3 are provided with a rotation area 11 for connecting and transporting the heavy object 5; The ramp channel 4 on the side of the building body 1 is used to arrange the ramp transmission system 6 to complete the up and down transportation of the heavy block 5. The side arrangement can reduce the damage to the internal structure of the building, and is beneficial to fire safety and noise pollution reduction; The ramp transmission system 6 is preferably implemented by a conveying device, which includes conventional structures such as a conveying chain, a conveying gear, a gear box, a motor, and a conveyor belt. Through this structure, the motor is started to drive the conveying gear to rotate, and the heavy blocks 5 on the conveyor belt can be transported through the conveying chain.

[0023] The transport and stacking of the heavy blocks 5 are achieved through the AGV trolley 7, which is an autonomously navigated unmanned vehicle widely used in automated transportation and material handling tasks. In this system, multiple vehicles work together to transport the heavy blocks and ensure the continuity of system operation and power generation.

[0024] On the premise of maintaining various weight specifications, the weight block 5 can be filled with solid waste such as domestic garbage and construction waste, which not only reduces costs but also reduces pollution to the environment.

[0025] In order to facilitate the stacking of the weight block 5, a groove 14 is provided on the top and a convex block 15 is provided on the bottom. The shapes of the convex block 15 and the groove 14 match, so that stability can be ensured when stacking.

[0026] Through the above system, the single energy storage process of the slope gravity energy storage system is as follows: the AGV trolley 7 in the lower overhead layer 3 grabs the heavy object 5 and places it on the slope transmission system 6; the slope transmission system 6 receives external power supply and transports the heavy object 5 upward, preferably to the rotation area 11 of the upper overhead layer 2; then, the AGV trolley 7 in the upper overhead layer 2 grabs the heavy object 5 transported up by the slope transmission system 6 and transports it to the stacking area 14 for stacking. Among them, the external power supply driving the slope transmission system 6 can preferably be powered by the DC bus of the power grid, and the motor of the slope transmission system is driven to work through the AC / DC converter; In contrast to the single energy storage process of the slope gravity energy storage system described above, the single power generation process of the slope gravity energy storage system is as follows: the AGV trolley 7 in the upper overhead layer 2 grabs the heavy object block 5 and transports it to the slope transmission system 6; relying on the gravity potential energy of the heavy object block 5 itself, the slope transmission system 6 will transport it downward to the lower overhead layer 3, preferably after it is delivered to the turning area of ​​the lower overhead layer 3, the AGV trolley 7 in the lower overhead layer 3 grabs the heavy object block 5 transported by the slope transmission system 6 and transports it to the stacking area 14 for stacking; during the descent of the heavy object block 5, the generator connected to the slope transmission system 6 is driven to work, and the generated electric energy is converted and input into the power grid 10. Among them, the electric energy is converted and input into the power grid 10, preferably by transmitting the generated electric energy to the DC bus through the AC / DC converter.

[0027] This photovoltaic storage direct-flexible building system based on sloped gravity energy storage achieves efficient transportation of weight blocks 5 and continuous supply of electric energy through a reasonable layout on the building body 1, while saving energy and being environmentally friendly; and through this system, the slope transmission system 6 can drive multiple weight blocks at the same time, solving the problem of discontinuous power generation caused by a single weight block in the vertical system; and the number of weight blocks involved in power generation and the use of weight blocks of different masses can be adjusted in real time according to load demand, thereby improving the flexibility of load matching.

[0028] In order to use this system reasonably and efficiently, the following operation strategy is preferred. The operation process refers to Figure 5 As shown in the figure, ①-⑤ represent S1-S5 respectively, as follows: S1 (priority: highest): photovoltaic power supply. When the photovoltaic power generation generated by the photovoltaic power generation system 9 can meet the building load demand, the photovoltaic power is directly supplied to the building load (user point load) to achieve photovoltaic self-consumption; Under this operating mode, the building directly uses the electricity generated by photovoltaic power without the support of energy storage systems or power grids; it maximizes the use of photovoltaic power generation, reduces dependence on energy storage systems and power grids, improves energy utilization efficiency, and reduces energy costs.

[0029] S2 (priority: second highest): photovoltaic and slope gravity energy storage system power supply. When photovoltaic power generation is insufficient to meet the building load demand, the insufficient power consumption of the building is supplemented by the slope gravity energy storage system. In this operation mode, the energy storage system will release the stored electric energy to meet the building load requirements. The function of the energy storage system is fully utilized, so that it can act as a backup power source when photovoltaic power generation is insufficient, ensuring the continuous supply of electricity for the building.

[0030] S3 (Priority: Medium): The photovoltaic, slope gravity energy storage system and the power grid provide power supply. When the photovoltaic and slope gravity energy storage systems are insufficient to meet the building load demand, the power grid will supply the insufficient power for the building. This operation mode fully combines the advantages of photovoltaic power generation, energy storage system and power grid, making the supply of building electricity more flexible and reliable. The energy storage system can provide electricity when photovoltaic power generation is insufficient, while the external power grid provides supplementary power as a backup power source.

[0031] S4 (priority: second lowest): Utilize photovoltaic energy storage. When there is excess power from photovoltaic power generation to supply building loads, the excess power is supplied to the slope gravity energy storage system for energy storage. Under this operation mode, the excess electricity generated by photovoltaic power generation can be utilized to the maximum extent to avoid waste. The function of the energy storage system under this strategy is mainly to store excess photovoltaic power for future use. This helps to balance the energy supply and demand of the system and improve energy utilization efficiency.

[0032] S5 (priority: lowest): Excess photovoltaic power is connected to the grid. When there is excess power from photovoltaic power generation to supply building loads, the excess power is supplied to the slope gravity energy storage system for energy storage, and the subsequent excess power is injected into the grid.

[0033] Under this operation mode, the excess electricity generated by photovoltaic power generation is utilized to the maximum extent, improving the self-sufficiency of the system. By injecting excess electricity into the grid, the power trading income with the grid is obtained.

[0034] It should be noted that when the slope gravity energy storage system needs to supply power, the increase in grid load is first detected through the power demand sensor, and the data analysis system predicts the required increase in power output in the future time period. If the power output has exceeded the power generation limit of the slope gravity energy storage system, the slope gravity energy storage system will generate power at full capacity; if the power output is less than the power generation limit of the slope gravity energy storage system, the control system of the slope gravity energy storage system matches the power generation that can be generated by the weight block to be equal to the required increase in power output, and selects the appropriate weight block for scheduling, that is, selects the required weight of the weight block 5 for power generation.

[0035] The above-mentioned slope gravity energy storage system power supply method is adopted. For example: the power demand sensor detects an increase in the grid load, and the data analysis system predicts that an increase of 10 megawatts of power output will be required in the next 10 minutes; the control system selects a suitable combination of weight blocks 5 according to the current state of the weight blocks 5, for example, two 10-ton weight blocks and one 5-ton weight block are selected, totaling 25 tons. According to the gravitational potential energy and transmission efficiency of the weight blocks 5, it is calculated that these 25-ton weight blocks can generate about 10 megawatts of power output; the control system issues a command to release the selected weight block 5 through the cooperation of the AGV trolley 7, and the gravitational potential energy of the weight block 5 is efficiently converted into electrical energy through the smooth descent of the slope transmission system 6.

[0036] It is further preferred to set a feedback system to monitor the descending speed and position of the weight block 5 in real time to ensure stable output of the generated power; if the actual power demand changes, the control system can instantly adjust the release speed of the weight block 5 or add additional weight blocks 5 to participate.

[0037] Obviously, the above is only a part of the embodiments of the present invention, not all of the embodiments. The above embodiments are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any combination, modification, equivalent replacement, improvement and all other embodiments that can be made by those of ordinary skill in the art within the spirit and principle of the present invention should be within the protection scope of the present invention.

Claims

1. A photovoltaic storage direct-flexible building system based on slope-type gravity energy storage, comprising a building body (1) and a power grid (10), characterized in that: The invention comprises a photovoltaic power generation system (9) electrically connected to a power grid (10) and arranged on the top of a building body (1), and an internal slope gravity energy storage system; the slope gravity energy storage system comprises an upper overhead layer (2) arranged in the building body (1), a lower overhead layer (3) whose height is lower than the upper overhead layer (2), and a slope passage (4) arranged on the side of the building body (1); a slope transmission system (6) is arranged in the slope passage (4); weight block passages (8) are arranged at the bottom of the upper overhead layer (2) and the top of the lower overhead layer (3) at the two ends of the slope passage (4), respectively; and a plurality of weight blocks (5) and an AGV trolley (7) are respectively arranged in the upper overhead layer (2) and the lower overhead layer (3).

2. The photovoltaic storage direct-flexible building system based on slope gravity energy storage according to claim 1 is characterized in that: The steps of storing energy in the slope gravity energy storage system include: the AGV trolley (7) in the lower overhead layer (3) grabs the heavy object (5) and places it on the slope transmission system (6); the slope transmission system (6) receives external power supply and transports the heavy object (5) upward; and the AGV trolley (7) in the upper overhead layer (2) grabs the heavy object (5) transported up by the slope transmission system (6) and transports and stacks it.

3. The photovoltaic storage direct-flexible building system based on slope gravity energy storage according to claim 1 is characterized in that: The steps of generating electricity by the slope gravity energy storage system include: the AGV trolley (7) in the upper overhead layer (2) grabs the heavy object (5) and transports it to be placed on the slope transmission system (6); relying on the gravity potential energy of the heavy object (5), the slope transmission system (6) transports it downward to the lower overhead layer (3), and the AGV trolley (7) in the lower overhead layer (3) grabs the heavy object (5) transported down by the slope transmission system (6) and transports and stacks it; during the descent of the heavy object (5), the generator connected to the driving and slope transmission system (6) works, and the generated electric energy is converted and input into the power grid (10).

4. The photovoltaic storage direct-flexible building system based on slope gravity energy storage according to claim 1 is characterized in that: The upper overhead layer (2) and the lower overhead layer (3) are provided with a rotation area (11) for connecting and transferring heavy objects (5).

5. The photovoltaic storage direct-flexible building system based on slope gravity energy storage according to claim 1 is characterized in that: The weight block (5) is provided with a groove (14) at the top and a convex block (15) at the bottom.

6. An operating method of a photovoltaic storage direct-flexible building system based on slope gravity energy storage as described in any one of claims 1 to 5, characterized in that: The steps include: S1: Photovoltaic power supply. When the photovoltaic power generation generated by the photovoltaic power generation system 9 can meet the building load demand, the photovoltaic power is directly supplied to the building load to achieve photovoltaic self-consumption; S2: Powered by photovoltaic and slope gravity energy storage system. When photovoltaic power generation is insufficient to meet the building load demand, the insufficient power consumption of the building is supplemented by the slope gravity energy storage system. S3: The photovoltaic, slope gravity energy storage system and the power grid provide power supply. When the photovoltaic and slope gravity energy storage systems are insufficient to meet the building load demand, the power grid will supply the insufficient power for the building. S4: Utilize photovoltaic energy storage. When there is excess power from photovoltaic power generation to supply building loads, the excess power is supplied to the slope gravity energy storage system for energy storage. S5: Excess photovoltaic power is connected to the grid. When there is excess power from photovoltaic power generation to supply building loads, the excess power is supplied to the slope gravity energy storage system for storage, and the subsequent excess power is injected into the grid.

7. The operating method of the photovoltaic storage direct-flexible building system based on slope-type gravity energy storage according to claim 6 is characterized in that: When the slope gravity energy storage system is powered, the power demand sensor first detects an increase in grid load, and the data analysis system predicts the required increase in power output in future time periods; the control system of the slope gravity energy storage system matches the power generation that the weight blocks can generate with the required increase in power output, and selects the appropriate weight blocks for scheduling.

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