Stepped arrangement structure of mountainous terrain megawatt-level energy storage power station

Abstract

Mountain terrain million kilowatt energy storage power station step arrangement structure belongs to the field of energy storage power station engineering arrangement, and aims to solve the technical problems of traditional mountain energy storage power station, such as large-scale field flattening, large amount of earthwork, high cost, serious ecological damage and inconvenient operation and maintenance. The present application sets multiple step platforms from high to low along the mountain body, the adjacent platforms are connected with the transition of the connecting slope, the energy storage units are arranged on the platforms, the maintenance road is arranged on the slope surface; the platform is divided into three platforms in the energy storage area and independent platforms in the booster area; the energy storage units are arranged in array, the battery energy storage cabin and the PCS booster integrated machine are arranged in concentration or staggered, the battery energy storage cabin is arranged on the foundation, and the foundation is fixedly connected with the fire wall; the station area is matched with annular fire-fighting road, cable trench, auxiliary facilities and slope inspection steps. The present application greatly reduces the amount of earthwork excavation and filling, improves the land utilization rate, has stable structure, convenient operation and maintenance, safety and reliability, significantly reduces the construction cost, and is suitable for the mountain construction of million kilowatt large-capacity energy storage power station.

Description

Technical Field

[0001] This invention relates to the field of renewable energy storage technology, and in particular to a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain. Background Technology

[0002] Against the backdrop of rapid development of renewable energy, with the large-scale integration of renewable energy sources such as wind and solar power into the grid, traditional power grid systems dominated by thermal power face the challenge of highly volatile power generation and load sides. Energy storage technology, as a key means to solve the grid integration problem of renewable energy, is becoming increasingly important. Energy storage systems can not only improve the grid-friendliness of renewable energy integration on the power generation side and reduce the burden on the grid, but also participate in the overall dispatching of the power system through applications such as peak shaving and frequency regulation, providing crucial flexible adjustment capabilities for the power grid system.

[0003] With the increasing demand for energy storage, the capacity of energy storage power stations is moving towards the megawatt level. However, the huge land requirements of megawatt-level energy storage power stations mean that the large, undeveloped areas available for development often inevitably cover or are adjacent to mountainous and hilly areas, resulting in significant local topographical variations and elevation differences, posing a huge challenge to the layout of energy storage power stations. Traditional energy storage power station layout methods usually require a uniform, flat site with consistent elevation, necessitating large-scale excavation and backfilling. This not only leads to a huge amount of earthwork, long construction periods, and high construction costs, but also seriously damages the original topography and ecological environment, contradicting the concept of green and low-carbon construction.

[0004] Against this backdrop, although existing technologies contain patents related to terrain processing, none of them can solve the aforementioned core problems, specifically: On the one hand, some technologies only address local micro-topography and lack a comprehensive design for large elevation differences across the entire station. For example, CN119029454A discloses a compact staggered layout method for electrochemical energy storage power stations, which only uses cable trenches as partial steps to separate prefabricated modules and handle minor elevation differences between modules. This solution is suitable for small-scale, micro-topography scenarios, but it cannot cope with the comprehensive design of multi-level steps, large elevation differences, and overall earthwork optimization required for megawatt-level energy storage power stations, and its adaptability to mountainous terrain is extremely poor.

[0005] On the other hand, while some technologies adopt a stepped layout, they are not adapted to the process characteristics and safety requirements of energy storage power stations. For example, CN121327934A proposes a compact booster station spatial layout method and system for mountain wind farms. Although it involves a stepped prototype design, its core focuses on booster station space optimization and digital modeling. It does not systematically design for the dense battery compartments, PCS booster unit layout, fire prevention distances, operation and maintenance access, and slope maintenance roads in the energy storage area. It differs significantly from the equipment form and operation and maintenance specifications of energy storage power stations and cannot be directly reused.

[0006] Furthermore, while some converter stations and substations incorporate multi-level platforms in their site designs, these designs are completely incompatible with the needs of energy storage power stations. The converter station structure disclosed in CN221646525U, although employing multi-level platforms to arrange converter equipment, differs from energy storage power stations in its functional zoning, equipment layout logic, fire protection, and fire prevention requirements. It also lacks dedicated slope maintenance roads, firewall systems, and anti-slip foundations for energy storage power stations. Similarly, the stepped substation site disclosed in CN202718424U, while reducing earthwork through its stepped design, suffers from small step height differences, unreasonable drainage slope configurations, and a lack of design for the equipment array layout, multi-level energy storage area and independent booster area zoning, slope maintenance access connectivity, and foundation anchoring structure of energy storage power stations. This makes it difficult to meet the stringent requirements of megawatt-class large-capacity energy storage power stations in terms of fire safety, mountain stability, and operational access.

[0007] In summary, existing technologies either only address localized micro-topography or are applicable to equipment layouts in different scenarios such as substations, converter stations, and wind farm booster stations. Neither has developed a comprehensive layout scheme specifically for megawatt-level energy storage power stations, adapting to mountainous terrain with significant elevation differences, integrating multi-level design, clearly defining energy storage and booster zones, optimizing road and equipment layout, and minimizing earthwork while protecting the environment. Traditional layouts and existing patents cannot simultaneously solve key problems such as significant elevation differences in mountainous terrain, large-capacity layouts, large earthwork volumes, inconvenient operation and maintenance, severe ecological damage, and insufficient structural stability.

[0008] Therefore, developing a stepped layout structure for megawatt-class energy storage power stations that is adaptable to complex mountainous terrain, low-disturbance, low-cost, and highly reliable has become a pressing technical problem in this field. This invention addresses this challenge by proposing a compact, staggered layout method and structure for electrochemical energy storage power stations. It aims to effectively solve the difficulties faced by traditional layout methods in complex mountainous terrain, and promote the application and development of energy storage technology in the renewable energy field. Summary of the Invention

[0009] The technical problem to be solved by this invention is to provide a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain, which solves the technical problems of traditional energy storage power stations in mountainous terrain, such as the need for large-scale site leveling, large amount of earthwork, long construction period, high construction cost, serious ecological damage, and inconvenience in operation and maintenance.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention proposes a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain. Through a multi-tiered stepped design that adapts to the natural mountain slope, layered energy storage and voltage boosting equipment, and integrated maintenance access along the slope, this technical solution achieves significant reductions in earthwork, land conservation, high operational efficiency, and safe and stable operation. The specific details are as follows: The megawatt-class energy storage power station in mountainous terrain features a stepped layout structure, comprising multiple stepped platforms arranged sequentially from high to low along the natural slope of the mountain. These platforms include a first-level platform at the highest point and a fourth-level platform at the lowest point, with adjacent platforms connected by a transition slope. Each platform is equipped with groups of energy storage units, and each group of energy storage units includes multiple battery energy storage compartments and multiple PCS booster units. Maintenance roads are arranged on the slopes connecting the platforms. All battery energy storage compartments are mounted on foundations.

[0011] The multiple stepped platforms also include second-level and third-level platforms located between the first-level and fourth-level platforms. The vertical height difference between adjacent platforms is 1 to 2.5 meters, and the slope of the connecting slope is no greater than 1:2. The first-level, second-level, and third-level platforms are located in the energy storage area, while the fourth-level platform is located in the booster area. The fourth-level platform in the booster area is independently configured as a single step, and it transitions to the third-level platform via a connecting slope.

[0012] Each platform surface is designed with a drainage slope. The drainage slope of the first, second, and third platforms in the energy storage area does not exceed 3%, and the drainage slope of the fourth platform in the booster area does not exceed 1%. The energy storage units on each platform are arranged in an array, with fireproof distances and maintenance access points between adjacent energy storage units within the same platform. The battery energy storage compartment and the PCS booster unit are arranged in groups or staggered on each platform, effectively shortening the DC-side cable connection distance and reducing line losses.

[0013] The foundation adopts strip foundation or raft foundation form, arranged along the bottom outline of the battery energy storage compartment, to bear the vertical load of the battery energy storage compartment; the top surface of the foundation is flush with the ground elevation of the stepped platform, and the embedment depth meets the requirements of anti-slip and anti-overturning in mountainous terrain. The bottom of the firewall is fixedly connected to the foundation, forming an integral whole with the platform soil through the foundation anchoring structure, improving structural stability and fire safety.

[0014] The energy storage power station area is equipped with a ring-shaped fire-fighting road. The booster area includes the main transformer area, power distribution equipment area, SVG area, grounding transformer low resistance area, station service transformer area, and emergency oil tank area. Among them, the width and turning radius of the fire-fighting road in the main transformer area are larger than those in other areas of the booster area and the energy storage area. This is to meet the passage and turning needs of large fire trucks, maintenance vehicles, and main transformer transport vehicles, and improve the convenience and safety of power station fire rescue and operation and maintenance.

[0015] Cable trenches are set up on the platform, extending along the layout direction of the energy storage units, which facilitates cable laying and maintenance.

[0016] The platform area is equipped with one or more of the following: integrated prefabricated compartments, buried pump boxes, hazardous waste compartments, septic tanks, lightning rods, and perimeter walls, to meet the power station's production, operation, maintenance, and safety protection needs. The fourth-level platform in the booster zone is equipped with one or more of the following: SVG, prefabricated distribution compartments, grounding transformer low-resistance complete sets of equipment, emergency oil tanks, prefabricated substations, 35kV station service transformers, and distribution equipment, to complete the functions of power collection, transformation, and grid connection.

[0017] Slope inspection steps are installed on the connecting slopes, and these steps are arranged parallel to or intersect with the maintenance roads to facilitate personnel inspection and emergency access. The energy storage power station area is equipped with entrances and exits and a turning area. The turning area is located near the entrances and exits to ensure smooth vehicle entry, exit, and dispatch.

[0018] The present invention provides a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain, which has the following beneficial effects: 1. This invention effectively solves the specific technical problems faced by megawatt-level large-scale energy storage power stations in the field of renewable energy storage technology when arranged in complex mountainous terrain, such as difficulty in site leveling, large earthwork volume, high cost, heavy ecological damage, and low land utilization rate, and successfully overcomes the limitations of existing technologies.

[0019] 2. This invention adopts a multi-level stepped layout structure that conforms to the natural mountain terrain, rationally divides functional areas, and optimizes equipment layout and road system. While meeting the construction needs of megawatt-level large-capacity energy storage power stations, it significantly improves the overall technical and economic efficiency.

[0020] 3. This invention provides a layout scheme for a megawatt-class energy storage power station in mountainous areas that is highly adaptable, requires less earthwork, has a compact layout, is structurally stable, and is easy to operate and maintain. The technical effects have been verified by actual engineering projects and comparisons with multiple schemes, demonstrating outstanding effectiveness and superiority.

[0021] 4. This invention is highly adaptable and requires less earthwork. The multi-level steps conform to the original mountainous terrain. After vertical scheme optimization and comparison, the amount of earthwork can be greatly reduced. Compared with the overall site leveling without steps, the amount of excavation is reduced by 61% and the amount of filling is reduced by 37%, significantly reducing the project cost.

[0022] 5. This invention significantly reduces engineering construction costs. By greatly reducing the amount of earthwork, it simultaneously reduces construction costs, material input, and waste disposal costs, thereby improving the overall economic benefits of the project.

[0023] 6. This invention features a compact layout and saves land. By using stepped slopes, it transforms difficult-to-use sloping land into usable platforms, significantly improving land utilization and meeting the land requirements of megawatt-level large-capacity energy storage power stations.

[0024] 7. The present invention has a stable and reliable structure. The platforms at each level are connected by stable slopes, and the overall structure is adapted to the stress characteristics of mountainous terrain, which can ensure the long-term structural safety of the power station under complex elevation differences.

[0025] 8. This invention is convenient and efficient in operation and maintenance. The connection slope is equipped with an inspection channel, which facilitates the rapid passage of operation and maintenance personnel between platforms at all levels, significantly improving the power plant's operation and maintenance response speed and operation management efficiency.

[0026] 9. This invention significantly shortens the construction cycle, reduces large-scale excavation and backfilling operations, simplifies civil engineering procedures, accelerates on-site construction progress, and helps power plants to be quickly put into operation.

[0027] 10. The equipment layout of this invention is optimized and reasonable. The battery energy storage compartment and the PCS booster unit are arranged in close proximity or in a centralized manner, which effectively shortens the length of the DC side cable and reduces line loss and material costs.

[0028] 11. The drainage design of the platform of this invention is scientific. It is set with appropriate slopes according to the energy storage area and the booster area, which ensures smooth drainage, avoids water accumulation on the equipment foundation, and improves the long-term operational reliability of the power station.

[0029] 12. This invention has outstanding ecological and environmental protection features, significantly reduces site disturbance, minimizes vegetation damage and soil erosion, and maximizes the protection of the original topography and landforms, meeting the construction requirements of green energy storage power stations.

[0030] 13. This invention has excellent fire safety. The station area is equipped with a standard circular fire road. The road width and turning radius meet the requirements of the specifications, which improves the accessibility of emergency rescue and the fire protection capability.

[0031] 14. The basic support system of this invention is reliable. The equipment foundation and the firewall form an integral structure with excellent anti-slip and anti-overturning performance, further enhancing the safety redundancy of the power station operation.

[0032] 15. The present invention has clear and independent functional partitions. The energy storage area and the booster area are arranged in a hierarchical manner, without interfering with each other, which facilitates system scheduling, partition maintenance and safety management.

[0033] 16. The supporting facilities of this invention are fully integrated, and cable trenches, integrated prefabricated cabins, hazardous waste treatment, lightning protection, and perimeter walls are configured simultaneously to fully meet the needs of production, operation and maintenance, and safety protection.

[0034] 17. This invention has wide terrain adaptability and can adapt to various complex mountain conditions such as high elevation difference, steep slope, and south-high-north-low. It has strong versatility and covers a wide range of applicable scenarios.

[0035] 18. The overall technical solution of this invention is mature and feasible. Verified by actual engineering data, it is superior to traditional site leveling solutions in terms of economy, safety, environmental protection, and practicality. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a plan view of the four-stage stepped layout of the energy storage power station in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall layout of the energy storage station of the present invention; Figure 3 This is a plan view of the booster zone of the energy storage station of the present invention; Figure 4 This is a layout diagram of the energy storage unit of the present invention; Figure 5 This is a schematic diagram of the step slope arrangement in the case of road collapse surface setting of the present invention; Figure 6 This is a schematic diagram of the stepped slope arrangement in the case where no maintenance road is provided on the slope surface according to the present invention; Figure 7 This is a schematic diagram of the stepped slope arrangement when the maintenance road of the present invention is located on the upper part of a slope. Figure 8 This is a schematic diagram of the step slope arrangement when the maintenance road of the present invention is located at the bottom of a slope; Figure 9 This is a schematic diagram of the elevation of the steps aa in the overall layout of the energy storage station of the present invention; In the diagram: Level 1 Platform 1, Level 2 Platform 2, Level 3 Platform 3, Level 4 Platform 4, Connecting Slope 5, Cable Trench 6, Integrated Prefabricated Cabin 7, Buried Pump Box 8, Hazardous Waste Chamber 9, Septic Tank 10, Turnaround Area 11, Lightning Rod 12, Fire Access Road 13, Entrance / Exit 14, Perimeter Wall 15, SVG 16, Prefabricated Power Distribution Cabin 17, Grounding Transformer Low Resistance Complete Set 18, Emergency Oil Tank 19, Box-type Substation 20, Station Service Transformer 21, Power Distribution Equipment 22, Slope Inspection Steps 23, Battery Energy Storage Cabin 24, PCS Step-up Integrated Unit 25, Firewall 26, Foundation 27, Maintenance Road 28, Foundation Anchoring Structure 29. Detailed Implementation

[0037] The technical solutions of the present invention will be further described below with reference to the embodiments and accompanying drawings: Example 1 This embodiment provides a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain, such as... Figure 1 As shown, the design and optimization of schemes are carried out based on an actual engineering site in Inner Mongolia.

[0038] like Figure 1 As shown, this embodiment provides a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain, with the scheme design and optimization comparison based on an actual engineering site in Inner Mongolia.

[0039] The project has a total construction scale of 1000MW / 4000MWh energy storage system, which adopts lithium iron phosphate battery energy storage system and includes 199 energy storage units. Each energy storage unit consists of one 5.04MW PCS (Power Conversion System) integrated booster unit 25 and four 5.031MWh battery energy storage compartments 24.

[0040] A new 220kV step-up substation will be constructed. The main transformers at the substation will be designed as 4 × 280MVA units, with a voltage level of 220 / 35kV. The 220kV side will adopt a single busbar connection. The energy storage device will be connected to the 35kV side of the substation via a 35kV collector line, and after voltage boosting, it will be connected to the 220kV side of the substation via two 220kV lines. The energy storage area and the step-up substation are both included in this design scope.

[0041] 1. Site Overview and Topographic Features like Figure 1 and Figure 9 As shown, the proposed site has a relatively undulating terrain, exhibiting a typical pattern of higher elevations in the south and lower elevations in the north, with mountains in the south and hills in the north. The borehole elevations range from 1557.33 meters to 1594.89 meters (1985 National Elevation System), with a maximum elevation difference of 37.56 meters. The southern part of the site is mountainous, while the northern part is hilly, with significant variations in the original natural slope, making it a typical complex mountainous terrain.

[0042] 2. Overall Vertical Design Principles The vertical design of the station area is determined within the framework of the established overall site layout, taking into account factors such as the overall site plan, topography, engineering geological conditions, flood control and drainage, process conditions, and site drainage. Since the booster station and energy storage station occupy a large area and the existing terrain is highly undulating, this design adopts a stepped approach to adapt to the original terrain.

[0043] The site entrance is located near a gully. To ensure smooth traffic flow, the overall site elevation is primarily controlled by the 14th elevation of the entrance / exit. Based on the slope requirements of the entrance road and the internal fire access road (13th elevation), the elevation of the substation entrance is determined to be 1566.5 meters (1985 National Elevation System), which serves as the benchmark control point for the entire station's vertical design.

[0044] 3. Functional partitioning and platform division like Figure 1 and Figure 2 As shown, the project site is functionally divided from the location of the access road: the area south of fire road 13 is designated as an energy storage area, and the area north of fire road 13 is designated as a booster station area; at the same time, a small number of energy storage areas are arranged in the area with better terrain conditions north of the booster station to make full use of land resources.

[0045] The main buildings and structures in the substation area include a 35kV prefabricated distribution module 17, a hazardous waste storage module 9, and a comprehensive prefabricated module 7. The comprehensive prefabricated module 7 is located north of the station entrance, relatively independent of the production area, meeting the requirements for convenient operation and management. The energy storage area is arranged in a multi-tiered, stepped layout based on the original terrain undulations. To achieve a balance between earthwork and economy, the vertical height difference between adjacent platforms is designed to be 2 meters in this embodiment, and the slope of the connecting slope 5 is set to 1:2 (i.e., a horizontal distance of 2 meters and a vertical height of 1 meter) to ensure slope stability.

[0046] 4. Station Area Road System like Figure 1 , Figures 5 to 8 As shown, a ring-shaped fire access road 13 is provided within the site to meet fire protection and operation and maintenance requirements. The energy storage power station area is equipped with this ring-shaped fire access road 13. The booster zone includes the main transformer area, the power distribution equipment area 22 area, the SVG (Static Var Generator) area 16 area, the grounding transformer low-resistance area, the station service transformer area 21 area, and the emergency oil tank area 19 area. The fire access road 13 in the main transformer area is 4.5 meters wide with a turning radius of 12 meters; the fire access roads 13 in other areas of the booster zone and the energy storage area are 4.0 meters wide with a turning radius of 9 meters, all meeting the fire protection requirements. The road system is arranged along the edges of each platform and the connecting slopes 5 to ensure accessibility between platforms.

[0047] Slope inspection steps 23 are installed on the connecting slope 5, and the slope inspection steps 23 are arranged parallel to or intersect with the maintenance road 28; for example Figures 5 to 8 As shown, the maintenance road 28 can be arranged in four ways: the maintenance road 28 is set across the slope, the maintenance road 28 is not set on the slope, the maintenance road 28 is set on the upper part of the slope, and the maintenance road 28 is set on the lower part of the slope.

[0048] 5. Power station layout All energy storage system equipment in the independent energy storage power station adopts a container installation scheme. A new 220kV step-up substation will be built. The main buildings and structures in the substation area include 17 prefabricated 35kV distribution compartments, a secondary relay protection compartment, a battery compartment, a hazardous waste compartment, and 7 integrated prefabricated compartments.

[0049] like Figure 1 As shown, the first-level platform 1, the second-level platform 2, and the third-level platform 3 of the energy storage area are arranged along the mountainside from high to low, while the fourth-level platform 4 of the booster area is set as a separate step. The energy storage area has a total of three steps, with a height difference of 2m between each step. All steps in the energy storage area slope down the mountainside at a 3% gradient in four directions. The booster area is a separate step with a site leveling slope of 1%.

[0050] like Figure 4 As shown, energy storage units are arranged in groups on each platform of the energy storage area. Each group of energy storage units includes a battery energy storage compartment 24 and a PCS boost converter 25. To optimize cable routing and reduce losses, the battery energy storage compartment 24 and the PCS boost converter 25 are arranged in a staggered manner on the platform, so that each group of battery energy storage compartments 24 is connected to the PCS boost converter 25 as close as possible.

[0051] Within the same platform, a fireproof distance of no less than 3 meters is maintained between adjacent energy storage units, and a ring-shaped maintenance passage is reserved to run through the entire platform. The battery energy storage compartment 24 is installed on the foundation 27, which is a strip foundation or a raft foundation; a firewall 26 is set between adjacent energy storage units, and the bottom of the firewall 26 is fixedly connected to the foundation 27 and fixed to the platform soil as one unit through the foundation anchoring structure 29.

[0052] Cable trench 6 is set up on the platform, extending along the layout direction of the energy storage units; the platform area is equipped with buried pump box 8, septic tank 10, lightning rod 12, fence 15, and turning yard 11; the fourth platform 4 of the step-up area is equipped with SVG 16, grounding transformer small resistance complete set of equipment 18, emergency oil tank 19, 10kV box substation 20, 35kV station service transformer 21, and 220kV power distribution equipment 22.

[0053] 6. Comparison of vertical layout schemes To verify the technical effectiveness of this invention and determine the optimal vertical layout parameters applicable to this site, this embodiment conducted comparative calculations of earthwork quantities for various vertical layout schemes under the same boundary conditions. The comparison schemes are as follows: Option 1: No steps, flat ground.

[0054] Option 2: The energy storage area is divided into 3 steps with a height difference of 2 meters and a surface slope of 3%; the step slope of the booster area is 1%.

[0055] Option 3: The energy storage area is divided into 3 steps with a height difference of 2 meters and a surface slope of 1%; the step slope of the booster area is 1%.

[0056] The comparison results of the various schemes are shown in Table 1: Table 1 Comparison Results of Each Scheme

[0057] From the comparison results in Table 1, the comparative analysis shows that: 1. Impact of step arrangement on earthwork volume: Under a 3% slope, the excavation volume of the four-step scheme is better than that of the scheme without steps, with an absolute reduction of about 61.3% in excavation volume and a reduction of 36.5% in fill volume. This shows that adopting a step arrangement based on the terrain difference can effectively reduce the overall earthwork volume.

[0058] 2. The slope has a significant impact on the earthwork volume: Comparing the four-step scheme of Scheme 2 (3% slope) and Scheme 3 (1% slope), with the same number of steps, increasing the slope of the energy storage area from 1% to 3% (closer to the original mountain slope) reduces the absolute value of excavation volume by about 39.7% and the absolute value of net volume by about 52.6%.

[0059] Calculation results show that Scheme 2, the four-step scheme (3% slope of the energy storage area), achieves the lowest excavation volume and the smallest absolute value of net volume among the three schemes, meaning it requires the least modification to the original terrain and has the lowest engineering cost. This scheme effectively absorbs the 2m difference in terrain undulation through four steps, while the 3% slope of the step surface conforms to the natural slope of the original mountain, verifying the superiority of the "multi-step + reasonable slope" layout structure proposed in this invention.

[0060] Through the above arrangement, the energy storage power station of the present invention is built in accordance with the mountain terrain, which not only meets the huge land requirements of a megawatt-level energy storage power station, but also significantly reduces the amount of earthwork in response to the complex mountainous terrain with "high in the south and low in the north, with a maximum elevation difference of 37.56 meters", resulting in significant economic and environmental benefits.

[0061] Example 2 In another preferred embodiment, this embodiment is based on embodiment 1, such as... Figure 1 and Figure 5As shown, this embodiment discloses a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain. Taking a project site in Inner Mongolia as the implementation background, the total capacity of the power station is 1000MW / 4000MWh. It adopts a lithium iron phosphate battery system and sets up a total of 199 energy storage units. Each energy storage unit consists of one PCS boost converter 25 and four battery energy storage compartments 24.

[0062] The station area adopts a four-tiered platform layout: platform 1 (first tier), platform 2 (second tier), platform 3 (third tier), and platform 4 (fourth tier) (boosting zone). The vertical height difference between adjacent platforms is 2 meters, and the connecting slope 5 has a gradient of 1:2 to ensure slope stability. The drainage slope of the energy storage platform is 3%, and the drainage slope of platform 4 (fourth tier) in the boosting zone is 1%, meeting the site drainage and equipment installation accuracy requirements.

[0063] like Figure 5 As shown, this embodiment adopts a stepped road layout with maintenance road 28. Maintenance road 28 directly crosses the connecting slope 5 and smoothly connects with the top surface of each platform. Slope inspection steps 23 are set on the connecting slope 5 and arranged in parallel with maintenance road 28 to facilitate personnel inspection and equipment transportation.

[0064] The battery storage compartment 24 is installed on the foundation 27, which is a strip foundation or raft foundation. The top surface of the foundation is flush with the ground of the platform, and the burial depth meets the requirements for anti-slip and anti-overturning in mountainous terrain. Firewalls 26 are set between adjacent energy storage units. The firewalls 26 are arranged along the length of the platform, and their bottoms are fixedly connected to the foundation 27. They are also integrated with the platform soil through the foundation anchoring structure 29, which improves the fire protection and structural safety level.

[0065] The energy storage power station area is equipped with a ring-shaped fire access road 13. The booster zone includes the main transformer area, distribution equipment area, SVG area, grounding transformer low resistance area, station service transformer area, and emergency oil tank area. Among them, the width and turning radius of the fire access road 13 in the main transformer area of ​​the booster zone are larger than those in other areas. The fire access road 13 in the main transformer area is 4.5 meters wide and has a turning radius of 12 meters. The fire access road 13 in other areas is 4.0 meters wide and has a turning radius of 9 meters. This is to meet the passage and turning needs of large fire trucks, maintenance vehicles, and main transformer transport vehicles, and improve the convenience and safety of power station fire rescue and operation and maintenance.

[0066] Cable trenches 6 are installed along the energy storage unit layout on the platform for cable laying and protection. The platform area is equipped with a prefabricated integrated cabin 7, an underground pump box 8, a hazardous waste compartment 9, a septic tank 10, a lightning rod 12, a perimeter wall 15, a turning area 11, and an entrance / exit 14. The fourth-level platform 4 in the booster zone is equipped with an SVG 16, a 35kV prefabricated distribution cabin 17, a grounding transformer low-resistance complete set of equipment 18, an emergency oil tank 19, a 10kV box-type substation 20, a 35kV station service transformer 21, and a 220kV distribution device 22, enabling power collection, transformation, and grid connection.

[0067] Compared with the stepless scheme, the excavation volume in this embodiment is reduced by 61.3% and the filling volume is reduced by 36.5%, demonstrating outstanding economic and environmental benefits.

[0068] Example 3 In another preferred embodiment, this embodiment is based on embodiment 1, such as... Figure 1 and Figure 6 As shown in the figure, this embodiment discloses a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain. The construction scale, equipment configuration, and terrain conditions are the same as those in embodiments 1 and 2. The maximum elevation difference of the site is 37.56m, and the vertical control elevation of the entire station is 1566.5m.

[0069] The station area still adopts a four-stage stepped structure, with the first-stage platform 1 of the energy storage area, the second-stage platform 2 of the energy storage area, the third-stage platform 3 of the energy storage area, and the fourth-stage platform 4 of the booster area arranged in sequence. The height difference between adjacent platforms is 2m, the slope of the connecting slope 5 is 1:2, the drainage slope of the energy storage area is 3%, and the drainage slope of the booster area is 1%.

[0070] like Figure 6 As shown, this embodiment adopts a step-like layout that does not involve roads. The maintenance road 28 is only set along the edge of the platform and does not cross the connecting slope 5. A separate slope inspection step 23 is set on the connecting slope 5 for personnel to pass up and down the platform, minimizing slope excavation and disturbance.

[0071] The battery storage compartment 24 and the PCS booster unit 25 are arranged in an alternating manner to shorten the length of the DC cable; all equipment is installed on the foundation 27, and the firewall 26 is firmly connected to the foundation 27 through the foundation anchoring structure 29 to form a stable protective structure.

[0072] The energy storage power station area is equipped with a ring-shaped fire access road 13. The booster zone includes the main transformer area, power distribution equipment area, SVG area, grounding transformer low resistance area, station service transformer area, and emergency oil tank area. Among them, the width and turning radius of the fire access road 13 in the main transformer area of ​​the booster zone are larger than those in other areas of the booster zone and the energy storage zone. The fire access road 13 in the main transformer area is 4.5 meters wide and has a turning radius of 12 meters. The fire access road 13 in other areas of the booster zone and the energy storage zone is 4.0 meters wide and has a turning radius of 9 meters. This is to meet the passage and turning needs of large fire trucks, maintenance vehicles, and main transformer transport vehicles, and improve the convenience and safety of power station fire rescue and operation and maintenance.

[0073] The cable trench 6, integrated prefabricated compartment 7, hazardous waste compartment 9, lightning rod 12, perimeter wall 15, turning area 11, entrance and exit 14 and other ancillary facilities are set up completely in accordance with the specifications; the voltage boosting, power distribution, grounding and lightning protection equipment of the fourth-level platform 4 in the boosting area are fully configured to meet the requirements of safe operation and grid connection of the power station.

[0074] This embodiment offers optimal slope stability and is suitable for mountainous sites with moderate geological conditions and high ecological protection requirements.

[0075] Example 4 In another preferred embodiment, this embodiment is based on embodiment 1, such as... Figure 1 and Figure 7 As shown, this embodiment discloses a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain, with an installed capacity of 1000MW / 4000MWh and 199 sets of energy storage units. The number of platforms, elevation difference, slope and vertical design benchmarks are consistent with those of embodiments 1 and 2.

[0076] like Figure 7 As shown, in this embodiment, the maintenance road 28 is arranged on the stepped slope. The maintenance road 28 is arranged in the upper area of ​​the connecting slope 5, close to the edge of the next platform. The slope inspection steps 23 and the maintenance road 28 are arranged in an intersecting manner to enable personnel to quickly reach each platform.

[0077] The battery storage compartment 24 is fixed on the foundation 27, and the top surface of the foundation 27 is flush with the platform, providing good anti-slip and anti-overturning capabilities; the bottom of the firewall 26 is connected to the foundation 27 and anchored to the soil through the foundation anchoring structure 29, providing high fire resistance and structural safety.

[0078] The energy storage power station area is equipped with a ring-shaped fire access road 13. The booster zone includes the main transformer area, power distribution equipment area, SVG area, grounding transformer low resistance area, station service transformer area, and emergency oil tank area. Among them, the width and turning radius of the fire access road 13 in the main transformer area of ​​the booster zone are larger than those in other areas of the booster zone and the energy storage zone. The fire access road 13 in the main transformer area is 4.5 meters wide and has a turning radius of 12 meters. The fire access road 13 in other areas of the booster zone and the energy storage zone is 4.0 meters wide and has a turning radius of 9 meters. This is to meet the passage and turning needs of large fire trucks, maintenance vehicles, and main transformer transport vehicles, and improve the convenience and safety of power station fire rescue and operation and maintenance.

[0079] Cable trench 6 extends along the equipment layout direction and is equipped with complete facilities such as integrated prefabricated cabin 7, buried pump box 8, hazardous waste cabin 9, septic tank 10, lightning rod 12, fence 15, turning yard 11, and entrance / exit 14.

[0080] The fourth-level platform in the booster zone is fully equipped with SVG16, 35kV prefabricated distribution cabin17, grounding transformer low resistance complete set of equipment18, emergency oil pool19, 10kV box substation20, 35kV station service transformer21, and 220kV distribution equipment22, which meet the power conversion and transmission needs of large-capacity energy storage power station.

[0081] This embodiment is easy to construct and safe to operate and maintain, and is suitable for mountainous conditions with steep slopes and relatively open upper sites.

[0082] Example 5 In another preferred embodiment, this embodiment is based on embodiment 1, such as... Figure 1 and Figure 8 As shown, this embodiment discloses a stepped layout structure for a megawatt-class energy storage power station in mountainous terrain. The construction scale, terrain conditions, and platform division are consistent with those of embodiments 1 and 2, making it a preferred solution for low-disturbance construction in mountainous areas.

[0083] like Figure 8 As shown, in this embodiment, the maintenance road 28 is arranged at the bottom of the step slope. The maintenance road 28 is located at the bottom of the connecting slope 5, close to the next platform, without occupying the space on the top surface of the step and the middle of the slope, which greatly reduces the excavation of the mountain. The slope inspection steps 23 lead directly from the step platform to the maintenance road 28, which is efficient.

[0084] The battery storage compartment 24 and the PCS booster unit 25 are arranged in a centralized group and the equipment is installed on the foundation 27; the firewall 26, the foundation 27, and the foundation anchoring structure 29 form an integral structure with high safety and reliability.

[0085] The energy storage power station area is equipped with a ring-shaped fire access road 13. The booster zone includes the main transformer area, power distribution equipment area, SVG area, grounding transformer low resistance area, station service transformer area, and emergency oil tank area. Among them, the width and turning radius of the fire access road 13 in the main transformer area of ​​the booster zone are larger than those in other areas of the booster zone and the energy storage zone. The fire access road 13 in the main transformer area is 4.5 meters wide and has a turning radius of 12 meters. The fire access road 13 in other areas of the booster zone and the energy storage zone is 4.0 meters wide and has a turning radius of 9 meters. This is to meet the passage and turning needs of large fire trucks, maintenance vehicles, and main transformer transport vehicles, and improve the convenience and safety of power station fire rescue and operation and maintenance.

[0086] The site has complete supporting facilities such as drainage, cable trench 6, integrated prefabricated compartment 7, hazardous waste compartment 9, lightning rod 12, fence 15, turning area 11, and entrance / exit 14; the fourth-level platform 4 of the boosting area has complete boosting, power distribution, protection and grounding equipment, which meets the grid connection technical requirements.

[0087] This embodiment has the lowest earthwork excavation volume, reducing the net volume by 52.6% compared to the 1% slope step scheme, and has the least impact on the ecological environment. It is suitable for the construction of megawatt-class mountain energy storage power stations in ecological red line areas, areas with large elevation differences, and complex terrain.

[0088] In a preferred embodiment, the multiple stepped platforms also include a second-level platform 2 and a third-level platform 3 positioned between the first-level platform 1 and the fourth-level platform 4. The vertical height difference between adjacent platforms is 1 to 2.5 meters, and the slope of the connecting slope 5 is no greater than 1:2. This configuration allows for flexible adjustment of platform heights based on the actual mountainous terrain, making the platform layout more closely conform to the terrain. It reduces large-scale earthwork excavation and backfilling, lowering construction difficulty and cost. Simultaneously, a reasonable slope gradient ensures the slope's stability, preventing geological disasters such as landslides caused by excessively large or small slopes. This provides a reliable geological environment guarantee for the long-term stable operation of the energy storage power station, ensuring the safety of power station equipment and personnel.

[0089] In the preferred embodiment, the first-level platform 1, the second-level platform 2, and the third-level platform 3 are all located in the energy storage area, while the fourth-level platform 4 is located in the boosting area. The fourth-level platform 4 in the boosting area is independently configured as a single step, and is connected to the third-level platform 3 via a connecting slope 5. This configuration clearly separates the energy storage and boosting functions, making the overall layout of the power station more rational and orderly. It facilitates targeted management and maintenance of equipment in different functional areas, reducing mutual interference between different functional areas. It optimizes space utilization, meets the different site requirements of energy storage and boosting equipment, improves power station operating efficiency, and ensures the stability and reliability of power transmission and storage.

[0090] In the preferred embodiment, each platform surface is provided with a drainage slope. The drainage slope of the first-level platform 1, the second-level platform 2, and the third-level platform 3 in the energy storage area does not exceed 3%, and the drainage slope of the fourth-level platform 4 in the booster area does not exceed 1%. This design allows rainwater to quickly drain from the platform along the drainage slope, preventing rainwater accumulation on the platform surface. This avoids water accumulation causing immersion damage to the energy storage and booster equipment on the platform, extending the equipment's service life. It also reduces equipment short circuits and other malfunctions caused by water accumulation, lowers equipment maintenance costs, and ensures the safe and stable operation of the power station under various weather conditions.

[0091] In the preferred embodiment, the energy storage units on each platform are arranged in an array, with fire-prevention distances and maintenance access channels between adjacent energy storage units within the same platform. This arrangement facilitates unified management and monitoring of the energy storage units, improving management efficiency. Fire-prevention distances effectively prevent the spread of fire between energy storage units, reducing fire losses and ensuring power plant safety. Maintenance access channels facilitate routine inspections and maintenance by staff, shortening maintenance time, improving maintenance efficiency, ensuring timely restoration of normal operation of the energy storage units, and guaranteeing the stable power storage function of the power plant.

[0092] In the preferred embodiment, a ring-shaped fire access road 13 is provided within the energy storage power station area. The width and turning radius of the fire access road 13 in the main transformer area of ​​the booster station are both greater than those in other areas of the booster station and the energy storage area. This ring-shaped fire access road 13 ensures that fire trucks can quickly and smoothly reach all areas of the power station, improving fire rescue efficiency. The wider fire access road 13 and turning radius in the main transformer area can meet the passage and operation needs of large fire-fighting equipment. In the event of a fire or other emergency, rescue work can be carried out in a timely manner, effectively controlling the fire, reducing damage to power station equipment and personnel, and ensuring the safety of the power station.

[0093] In a preferred embodiment, slope inspection steps 23 are provided on the connecting slope 5, and the slope inspection steps 23 are arranged parallel to or intersecting with the maintenance road 28. This arrangement facilitates regular slope inspections by staff, allowing for timely detection of problems such as slope loosening and cracks. Staff can quickly access various parts of the slope via the inspection steps, addressing any issues promptly to ensure slope stability. In conjunction with the maintenance road 28, maintenance personnel can comprehensively inspect all parts of the power station, ensuring the overall structural safety of the power station and preventing slope problems from affecting its normal operation.

[0094] In a preferred embodiment, a cable trench 6 is provided on the platform, extending along the layout direction of the energy storage units. This arrangement provides space for centralized cable laying, avoiding haphazard cable installation. It facilitates centralized management and maintenance of the cables, reducing the risk of cable damage due to external factors. Simultaneously, the cable trench 6 protects the cables from the effects of rain, sun, and other external environmental factors, improving cable lifespan and power supply reliability, and ensuring stable power transmission to the power station.

[0095] In a preferred embodiment, the platform area is equipped with one or more of the following: a prefabricated integrated cabin 7, an underground pump tank 8, a hazardous waste storage tank 9, a septic tank 10, a lightning rod 12, and a perimeter wall 15. The prefabricated integrated cabin 7 integrates multiple functions, saving space and improving land utilization. The underground pump tank 8 ensures the power station's water supply needs. The hazardous waste storage tank 9 safely handles hazardous waste generated by the power station, preventing environmental pollution. The septic tank 10 treats domestic sewage, protecting the surrounding environment. The lightning rod 12 prevents lightning strikes from damaging power station equipment. The perimeter wall 15 provides security protection, preventing unauthorized personnel from entering and ensuring the safety of power station equipment and personnel.

[0096] In the preferred embodiment, the fourth-level platform 4 of the booster zone is equipped with one or more of the following: SVG 16, prefabricated distribution module 17, grounding transformer low-resistance assembly 18, emergency oil tank 19, prefabricated substation 20, station service transformer 21, and power distribution equipment 22. This configuration meets the various functional requirements of the booster zone, including power transformation, distribution, and protection. SVG 16 improves the stability of the power system, and the prefabricated distribution module 17 enables integrated equipment layout. The grounding transformer low-resistance assembly 18 ensures safe equipment operation, and the emergency oil tank 19 prevents oil leaks and environmental pollution. The prefabricated substation 20 and station service transformer 21 meet the power requirements of different voltage levels, and the power distribution equipment 22 achieves efficient power transmission, ensuring a reliable connection between the substation and the power grid.

[0097] In a preferred embodiment, the energy storage power station area is equipped with an entrance / exit 14 and a turning area 11, with the turning area 11 located close to the entrance / exit 14. This arrangement facilitates the entry and exit of personnel and vehicles, improving traffic flow. The turning area 11 provides sufficient turning space for vehicles, enabling them to smoothly enter and exit the power station and preventing collisions or other accidents during this process. Especially in emergencies, it ensures the rapid entry and exit of rescue vehicles, allowing for timely problem-solving, minimizing losses, and ensuring the normal operation of the power station.

[0098] In a preferred embodiment, the battery energy storage compartment 24 and the PCS boost converter 25 are arranged in groups or staggered on each platform. The grouped arrangement facilitates centralized management and control of the battery energy storage compartment 24 and the PCS boost converter 25, reducing line losses and improving energy conversion efficiency. The staggered arrangement optimizes space utilization, increases land use efficiency, and makes the platform layout more rational. Simultaneously, the equipment layout can be flexibly adjusted according to actual needs to meet the operating requirements of the power station under different operating conditions, ensuring the stability of power storage and transmission.

[0099] In a preferred embodiment, the battery storage compartment 24 is mounted on a foundation 27, which is either a strip foundation or a raft foundation, set along the bottom contour of the battery storage compartment 24 to bear the vertical load of the battery storage compartment 24. This arrangement, with its suitable foundation type, can evenly distribute the load of the battery storage compartment 24, ensuring the equipment is stably placed on the platform. This reduces problems such as equipment tilting and damage caused by uneven loads, extending the equipment's service life. It also prevents equipment instability from affecting the normal operation of the power station, ensuring the reliable realization of the power storage function.

[0100] In the preferred embodiment, the top surface of the foundation 27 is flush with the ground elevation of the stepped platform, and the embedment depth of the foundation 27 meets the anti-slip and anti-overturning requirements of the mountainous terrain. This configuration, with the top surface of the foundation 27 flush with the platform ground elevation, facilitates equipment installation and maintenance operations, improving work efficiency. A reasonable embedment depth enhances the stability of the foundation 27 in mountainous terrain, preventing slippage or overturning due to complex geological conditions. This ensures the safety of equipment such as the battery storage compartment 24, avoiding equipment damage or safety accidents caused by problems with the foundation 27.

[0101] In the preferred embodiment, a firewall 26 is installed between adjacent energy storage units. The firewall 26 is arranged along the length of the platform, with its bottom fixedly connected to the foundation 27 and its top higher than the top surface of the battery energy storage compartment 24. This configuration effectively prevents the spread of fire between energy storage units, confining the fire to a certain area and reducing fire damage. The fixed connection ensures the firewall 26 remains stable in the event of external forces or fire, providing reliable fire isolation. The design, extending above the top surface of the battery energy storage compartment 24, provides more comprehensive fire protection, ensuring the safety of the energy storage units and the entire power station.

[0102] In a preferred embodiment, the bottom of the firewall 26 is provided with a foundation anchoring structure 29 to fix the firewall 26 to the foundation 27 and the soil of the stepped platform as a whole. This arrangement enhances the connection strength between the firewall 26, the foundation 27, and the soil, improving the overall stability of the firewall 26. In the event of external impacts or emergencies such as fire, the firewall 26 can better perform its fireproof isolation function and is less prone to collapse or displacement. This ensures the safety of the energy storage unit and other equipment in the power station, reducing the impact of accidents such as fires on the power station.

[0103] In the preferred embodiment, the maintenance road 28 can be arranged in any of the following ways: the maintenance road 28 is located on the slope, not on the slope, located at the upper part of the slope, or located at the lower part of the slope. The elevation of the maintenance road 28 is compatible with the elevation of the foundation 27 of the corresponding stepped platform. These various arrangements of the maintenance road 28 can be flexibly selected according to the actual terrain and operation and maintenance needs, improving the rationality of the road layout. The compatible elevation facilitates the passage of operation and maintenance personnel, ensuring smooth access to the various equipment locations for maintenance. This ensures the smooth progress of operation and maintenance work, timely detection and resolution of equipment problems, and ensures the long-term stable operation of the power station.

[0104] In summary, the stepped layout structure of a megawatt-class energy storage power station for mountainous terrain proposed in this invention effectively solves the specific technical problems faced by megawatt-class large-scale energy storage power stations in complex mountainous terrain. Traditional energy storage power station layout methods, when facing mountainous terrain, require large-scale site leveling due to the large topographic relief, including excavation and backfilling operations. This results in massive earthwork, long construction periods, increased construction costs, and severe damage to the original ecological environment. Furthermore, traditional layout methods fail to fully utilize the mountainous terrain, resulting in low land utilization and difficulty in meeting the land requirements of megawatt-class large-capacity energy storage power stations. This invention successfully overcomes these limitations.

[0105] This invention adopts a multi-tiered, stepped layout structure that conforms to the natural mountain terrain, rationally dividing functional areas and optimizing equipment arrangement and road systems. Specifically, the power station is arranged with multiple stepped platforms following the natural slope from high to low, a departure from traditional methods and providing a more suitable layout for mountainous terrain. A connecting slope 5 is provided between adjacent stepped platforms, and a maintenance road 28 is laid on the slope surface for convenient access by maintenance personnel. Simultaneously, the vertical height difference between adjacent platforms is determined based on the site's elevation differences and extent, controlling the slope of the connecting slope to be no greater than 1:2, ensuring that the drainage slope of each platform surface adapts to the original terrain. This refined parameter design is highly reasonable.

[0106] This solution cleverly utilizes the mountainous terrain through a stepped platform layout, significantly reducing earthwork volume by 61% and fill volume by 37%, effectively solving the problems of large earthwork volume and high cost associated with traditional layout methods in mountainous terrain. While meeting the land requirements of a megawatt-class large-capacity energy storage power station, it improves land utilization by transforming unusable slopes into usable platforms through stepped slope treatment, overcoming the limitations of traditional layout methods. Furthermore, considering factors such as structural stability and ease of operation and maintenance, the solution incorporates maintenance access to improve operational efficiency while ensuring the long-term safe operation of the power station. Overall, the solution offers significant advantages.

Claims

1. A stepped layout structure for a megawatt-class energy storage power station in mountainous terrain, characterized by: The system includes multiple stepped platforms arranged sequentially from high to low along the natural slope of the mountain. The stepped platforms include a first-level platform (1) at the highest point and a fourth-level platform (4) at the lowest point, with adjacent platforms connected by a connecting slope (5). Each platform is equipped with a group of energy storage units, and each group of energy storage units includes multiple battery energy storage compartments (24) and multiple PCS booster units (25). A maintenance road (28) is arranged on the slope of the connecting slope (5). The stepped platforms also include a second-level platform (2) and a third-level platform (3) located between the first-level platform (1) and the fourth-level platform (4). The vertical height difference between adjacent platforms is 1 to 2.5 meters, and the slope of the connecting slope (5) is no greater than 1:

2. The battery energy storage compartments (24) and the PCS booster units (25) are arranged in groups or staggered on each platform. The first-level platform (1), the second-level platform (2), the third-level platform (3), the fourth-level platform (4 ... Platform (2) and the third-level platform (3) are both located in the energy storage area, and the fourth-level platform (4) is located in the boosting area. The fourth-level platform (4) in the boosting area is independently set as a step and is connected to the third-level platform (3) by a connecting slope (5). Each platform surface is provided with a drainage slope. The drainage slope of the first-level platform (1), the second-level platform (2) and the third-level platform (3) in the energy storage area does not exceed 3%, and the drainage slope of the fourth-level platform (4) in the boosting area does not exceed 1%. Firewalls (26) are set between adjacent energy storage units. The firewalls (26) are arranged along the length of the platform. The bottom of the firewalls (26) is fixedly connected to the foundation (27), and the top of the firewalls (26) is higher than the top surface of the battery energy storage compartment (24). The bottom of the firewalls (26) is provided with a foundation anchoring structure (29) to fix the firewalls (26) to the foundation (27) and the soil of the stepped platform as one unit.

2. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The energy storage units on each platform are arranged in an array, and fireproof distances and maintenance channels are provided between adjacent energy storage units within the same platform.

3. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The energy storage power station area is provided with a ring fire road (13). The width and turning radius of the fire road (13) in the main transformer area of ​​the boosting station in the boosting zone are both greater than the width and turning radius of the fire roads (13) in other areas of the boosting zone and the energy storage zone.

4. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The connecting slope (5) is provided with slope inspection steps (23), which are arranged parallel to or intersecting with the maintenance road (28).

5. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: Cable trenches (6) are provided on the platform, and the cable trenches (6) extend along the arrangement direction of the energy storage units.

6. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The platform is equipped with one or more of the following: a prefabricated integrated cabin (7), an underground pump box (8), a hazardous waste chamber (9), a septic tank (10), a lightning rod (12), and a perimeter wall (15).

7. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The fourth-level platform (4) in the boosting zone is equipped with one or more of the following: SVG (16), prefabricated power distribution cabin (17), grounding transformer low resistance complete set of equipment (18), emergency oil pool (19), box substation (20), station service transformer (21), and power distribution equipment (22).

8. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The energy storage power station area is provided with an entrance / exit (14) and a turnaround area (11), with the turnaround area (11) located near the entrance / exit (14).

9. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The battery energy storage compartment (24) is set on the foundation (27), which is a strip foundation or raft foundation, set along the bottom outline of the battery energy storage compartment (24), and is used to bear the vertical load of the battery energy storage compartment (24).

10. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The top surface of the foundation (27) is level with the ground elevation of the stepped platform, and the embedment depth of the foundation (27) meets the requirements for anti-sliding and anti-overturning of mountainous terrain.

11. The stepped layout structure of a megawatt-class energy storage power station in mountainous terrain according to claim 1, characterized in that: The arrangement of the maintenance road (28) includes any one of the following: the maintenance road (28) is set across the slope, the maintenance road (28) is not set on the slope, the maintenance road (28) is set on the upper part of the slope, and the maintenance road (28) is set on the lower part of the slope. The elevation of the maintenance road (28) is adapted to the elevation of the foundation (27) of the corresponding stepped platform.

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