Pit type arrangement structure of flywheel energy storage power station

Abstract

A pit type arrangement structure of a flywheel energy storage power station comprises a pit body which is arranged underground and is of a reinforced concrete structure, a pit equipment feeding port and an access port are formed in the upper portion of the pit body, flywheel control equipment is arranged at the position, located on the upper portion of the pit equipment feeding port, of the pit body, and flywheel energy storage equipment is arranged in the pit body. The flywheel energy storage device corresponds to a feed port of the pit device, a manhole cover is arranged on the access port, a cable inlet hole is formed in one side of the pit body, and a cable of the flywheel energy storage device is connected with the flywheel control device through the cable inlet hole. According to the pit type layout, flywheel energy storage equipment is deeply buried underground, a pit body of a reinforced concrete structure forms a natural barrier, the influence of external factors on the equipment is effectively reduced, noise and electromagnetic interference can be remarkably reduced, the fault occurrence rate of the equipment caused by environmental factors can be reduced due to the stable environment, and the service life of the equipment is prolonged; and the high-efficiency operation state of the flywheel energy storage equipment can be kept.

Description

Technical Field

[0001] This invention relates to the field of flywheel energy storage power station technology, and in particular to a pit-type layout structure for a flywheel energy storage power station. Background Technology

[0002] In today's energy sector, traditional energy storage technologies, such as chemical battery energy storage, face numerous challenges. Chemical batteries have a limited number of charge-discharge cycles. For example, common lithium-ion batteries typically have around 1000-3000 charge-discharge cycles. Frequent charging and discharging significantly reduce battery capacity, increasing operating costs and limiting their application in scenarios requiring long-term, frequent energy storage. Furthermore, the charge-discharge efficiency of chemical batteries is not perfect, usually ranging from 70% to 90%, indicating some energy loss. In terms of safety, chemical batteries pose risks of fire and explosion, especially under extreme conditions such as high temperatures and overcharging. These safety hazards limit their use in densely populated areas or locations with extremely high safety requirements.

[0003] With the large-scale development and utilization of renewable energy sources such as solar and wind power, the mismatch between energy supply and demand in time and space has become increasingly prominent. Solar energy relies on sunlight, generating electricity only during the daytime when there is sunshine, and cloudy or rainy weather conditions severely affect power generation. Wind power depends on the strength and stability of wind, and unstable winds lead to large fluctuations in power output. However, energy demand is relatively evenly distributed in time, with demand occurring both day and night, and a sharp increase during peak electricity consumption periods. This time lag between energy supply and demand makes energy storage technology a key element in balancing energy supply and demand. Spatially, energy production sites and consumption sites are often mismatched; for example, areas rich in wind resources may be far from densely populated urban power centers. This necessitates efficient energy storage technology to store and transport energy, achieving rational energy distribution.

[0004] In certain specific applications, such as grid frequency regulation and uninterruptible power supply (UPS) systems, energy storage technology has unique requirements. Grid frequency regulation demands that energy storage devices respond rapidly to power changes, enabling charging and discharging within a short time to maintain grid frequency stability. Traditional energy storage technologies have slow response times, making it difficult to meet the stringent requirements of grid frequency regulation. For UPS systems, in the event of a sudden mains power outage, energy storage devices need to immediately provide a stable power output to ensure the normal operation of critical equipment. This requires energy storage devices to possess high reliability, rapid response, and the ability to provide stable power over extended periods, requirements that current energy storage technologies cannot fully meet in some aspects.

[0005] Against this backdrop, flywheel energy storage has emerged as a novel energy storage technology. It boasts advantages such as high charging and discharging efficiency, fast response speed, and long service life, effectively compensating for the shortcomings of traditional energy storage technologies. It has demonstrated enormous potential in addressing energy supply and demand challenges and meeting the needs of specific application scenarios, thus attracting widespread attention and research. However, traditional flywheel energy storage power stations are deployed outdoors on the ground, resulting in a large footprint. Furthermore, the outdoor environment is complex and variable; factors such as temperature, humidity, and sandstorms significantly impact flywheel energy storage systems. Extreme temperatures can degrade flywheel material performance and increase component wear, while low temperatures may cause lubricating oil to solidify and reduce the performance of electronic components. High humidity can easily lead to short circuits and corrosion in electrical equipment, reducing insulation performance. Sandstorms can wear down the flywheel surface and, if they enter the equipment, affect the normal operation of bearings, sensors, and other components. Simultaneously, the outdoor ground-based deployment makes flywheel energy storage power stations vulnerable to natural threats; lightning strikes can damage electrical equipment and even cause fires. Outdoor environments are subject to frequent vibrations and shocks, such as those generated by vehicle movement and construction activities. These vibrations can affect the dynamic balance of the flywheel, leading to unstable equipment operation and increasing mechanical wear and the probability of failure. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a ground-pit layout structure for flywheel energy storage power stations that reduces the impact of external factors on the equipment, significantly reduces noise and electromagnetic interference, provides more suitable operating conditions for flywheel energy storage equipment, effectively resists external interference such as ground vibration and wind, ensures the stability and reliability of equipment operation, realizes efficient use of land resources, and improves energy utilization efficiency.

[0007] The technical solution of the present invention for a flywheel energy storage power station with a pit-type layout structure is as follows: a reinforced concrete pit body is set up under the ground, a pit equipment inlet and a maintenance port are opened on the upper part of the pit body, a flywheel control device is set on the upper part of the pit body above the pit equipment inlet, a flywheel energy storage device is set inside the pit body, the flywheel energy storage device corresponds to the pit equipment inlet, a manhole cover is set on the maintenance port, a cable inlet hole is opened on one side of the pit body, and the cable of the flywheel energy storage device is connected to the flywheel control device through the cable inlet hole.

[0008] Furthermore, a ventilation hole is opened on one side of the main body of the pit, and a ventilation device is installed on the outer wall of the main body of the pit at the ventilation hole. The ventilation device is connected to the air supply and exhaust vents on the ground through a ventilation pipe.

[0009] Furthermore, the ventilation device is an air conditioner or an exhaust fan.

[0010] Furthermore, a maintenance ladder is installed on the inner wall of the main pit below the inspection port.

[0011] Furthermore, lighting fixtures are installed in the main body of the pit.

[0012] The beneficial effects of the flywheel energy storage power station pit-type layout structure of the present invention are: I. The pit layout buries the flywheel energy storage equipment deep underground. The reinforced concrete pit structure forms a natural barrier, effectively reducing the impact of external factors on the equipment. On the one hand, it can greatly reduce the risk of accidental human contact or malicious damage, ensuring the stable operation of the equipment. On the other hand, in the event of extreme situations such as fire or explosion, the protective structure of the pit can block the spread of danger and protect the surrounding environment and personnel safety.

[0013] Second, it can significantly reduce noise and electromagnetic interference. The noise generated by the operation of the equipment is effectively blocked by the reinforced concrete structure of the pit, reducing the interference to the lives of surrounding residents. At the same time, electromagnetic interference is also confined underground, avoiding impact on surrounding electronic equipment and communication systems.

[0014] Third, the underground environment is relatively stable with minimal changes in temperature and humidity, providing more suitable operating conditions for flywheel energy storage equipment. A stable environment can reduce the failure rate of equipment caused by environmental factors and extend the service life of the equipment. In addition, the reinforced concrete structure of the pit provides solid support for the equipment, effectively resisting external interference such as ground vibration and wind, ensuring the stability and reliability of equipment operation, and thus improving the overall performance of the energy storage power station.

[0015] Fourth, in the context of increasingly scarce land resources, the pit layout shows unique advantages. It occupies only a small amount of ground space, and the ground area can continue to be used for other purposes, thus achieving efficient use of land resources.

[0016] Fifth, a stable operating environment helps maintain the efficient operation of flywheel energy storage equipment. By reducing energy loss caused by environmental fluctuations, the equipment can store and release energy more effectively, thereby improving energy utilization efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pit-type layout structure of a flywheel energy storage power station according to the present invention; Figure 2 yes Figure 1 A schematic diagram of the cross section along the A-A direction.

[0018] In the diagram, 1. Pit body; 2. Pit equipment feed inlet; 3. Inspection port; 4. Flywheel control equipment; 5. Flywheel energy storage equipment; 6. Manhole cover; 7. Cable inlet; 8. Ventilation hole; 9. Ventilation pipe; 10. Air conditioner; 11. Inspection ladder; 12. Lighting fixtures; 100. Ground. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote elements with the same or similar functions throughout. However, it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present invention.

[0020] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "set," "equipped with," "installed," "connected," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral construction; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two mechanisms, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] This invention relates to a pit-type layout structure for a flywheel energy storage power station, such as... Figure 1 — Figure 2 As shown, the structure includes a reinforced concrete pit body 1 set 100 meters below the ground. A pit equipment inlet 2 and an inspection port 3 are opened on the upper part of the pit body 1. A flywheel control device 4 is set on the upper part of the pit body 1 above the pit equipment inlet 2. A flywheel energy storage device 5 is set inside the pit body 1. The flywheel energy storage device 5 corresponds to the pit equipment inlet 2. A manhole cover 6 is set on the inspection port 3. A cable inlet hole 7 is opened on one side of the pit body 1. The cable of the flywheel energy storage device 5 is connected to the flywheel control device 4 through the cable inlet hole 7.

[0023] Furthermore, a vent 8 is provided on one side of the main pit body 1, and a ventilation device is installed on the outer wall of the main pit body 1 at the vent 8. The ventilation device is connected to the air supply and exhaust vents of the ground 100 via a ventilation pipe 9. Fresh air is introduced into the main pit body 1 through the air supply and exhaust vents to remove the heat generated by the flywheel energy storage device 5 and maintain a suitable temperature environment inside the main pit body 1. A combination of natural ventilation and the ventilation device can be used. When natural ventilation cannot meet the heat dissipation requirements, the ventilation device is activated.

[0024] Furthermore, the ventilation device is an air conditioner 10 or an exhaust fan.

[0025] Furthermore, an inspection ladder 11 is installed on the inner wall of the pit body 1 below the inspection port 3. For routine inspection and maintenance, workers can enter the pit body 1 by lifting the manhole cover 6 and climbing the inspection ladder 11.

[0026] Furthermore, a lighting fixture 12 is installed in the main body of the pit 1.

[0027] This invention discloses a pit-type layout structure for a flywheel energy storage power station. During construction, a pit structure is first excavated underground. The depth is typically determined based on geological conditions, the scale of the energy storage system, and safety requirements, generally ranging from several meters to over ten meters. The pit body 1 is then formed by pouring reinforced concrete within the pit. The interior of the pit body 1 creates an installation space for the equipment. The four sides of the pit body 1 form walls, the bottom forms a floor with embedded steel plates containing perforations, and the top forms a roof plate. An equipment inlet 2 and an inspection port 3 are provided on the roof plate of the pit body 1. The flywheel energy storage equipment 5 is hoisted through the equipment inlet 2. The flywheel energy storage device 5 is installed inside the main body of the pit 1. The bottom of the flywheel energy storage device 5 is fixed to the threaded holes in the steel plate by bolts. The flywheel control device 4 is set on the top plate above the feed inlet 2 of the pit equipment (the flywheel control device 4 adopts a prefabricated cabin structure, which is equipped with auxiliary equipment such as brake resistor, vacuum pump and water chiller, as well as a control center for monitoring and managing the flywheel energy storage device 5 in the pit. The specific structure of the flywheel control device 4 is existing technology). The cable of the flywheel energy storage device 5 is connected to the flywheel control device 4 through the cable inlet hole 7 (the cable is laid through the cable trench and enters the main body of the pit from the side and then enters the control device 4 from the feed inlet).

[0028] Although the embodiments of this application disclose the above-described methods, the content is merely an implementation method adopted for ease of understanding. Any person skilled in the art should understand that any modifications and changes in the form and details of the implementation can be made without departing from the spirit and scope of the present invention. However, the scope of patent protection of the present invention shall still be determined by the scope defined in the appended claims.

Claims

1. A flywheel energy storage power plant pit arrangement, characterized by: The utility model provides a pit main body (1) including setting reinforced concrete structure under ground (100), the upper portion of pit main body (1) is set up pit equipment feed inlet (2) and overhauling mouth (3), pit main body (1) is located the upper portion of pit equipment feed inlet (2) and is set up flywheel control equipment (4), the inside of pit main body (1) is set up flywheel energy storage equipment (5), flywheel energy storage equipment (5) corresponds with pit equipment feed inlet (2), overhauling mouth (3) is set up manhole cover (6), the side of pit main body (1) is set up cable entry hole (7), and the cable of flywheel energy storage equipment (5) is connected flywheel control equipment (4) through cable entry hole (7).

2. A flywheel energy storage plant pit arrangement according to claim 1, wherein: The side of pit main body (1) is set up air hole (8), and the outer wall of pit main body (1) is set up ventilation device at air hole (8), and ventilation device is communicated with the air supply and exhaust port of ground (100) through ventilation pipe (9).

3. A flywheel energy storage plant pit arrangement according to claim 2, wherein: The ventilation device is air conditioner (10) or exhaust fan.

4. A flywheel energy storage power plant pit arrangement according to claim 1, wherein: The inner wall of pit main body (1) is set up overhauling ladder (11) below overhauling mouth (3).

5. A flywheel energy storage plant pit arrangement according to claim 1, wherein: The pit main body (1) is provided with a lighting lamp (12).

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