Power transmission and distribution system

Abstract

The utility model discloses a power transmission and distribution system, and relates to the technical field of electric energy transmission, the power transmission and distribution system comprises a positioning device, a closed dense bus duct and a sealing device, and the positioning device is buried in an underground bus duct cavity; the closed dense bus duct is located in the bus duct cavity, the closed dense bus duct is clamped and fixed through a positioning device, the closed dense bus duct comprises a bus duct main body and a bus duct busbar, the bus duct busbar is arranged on the bus duct main body, and the part, located in the bus duct main body, of the bus duct busbar is sealed through an insulating material; the part, outside the bus duct main body, of the bus duct busbar can be connected with a power transmission and distribution component; and the sealing device is arranged at the end part of the closed dense bus duct and is used for sealing the part, positioned outside the bus duct main body, of the bus duct busbar by using a sealing material. According to the power transmission and distribution system, the problems that the civil engineering excavation width is increased and the construction difficulty is increased due to buried laying of a plurality of cables are solved.

Description

Technical Field

[0001] This application relates to the field of power transmission technology, and in particular to a power transmission and distribution system. Background Technology

[0002] In the current field of photovoltaic power plant construction, especially in village-wide power collection projects, the installed capacity is showing a continuous upward trend due to large-scale electrification construction and renovation. As an important power supply facility, the stability and efficiency of the power transmission system of photovoltaic power plants are crucial to the entire power supply network. Traditional power transmission mainly relies on cables; however, with the increase in the capacity of photovoltaic power plants, the current on the 0.4 kV side also increases, and traditional cables are gradually revealing many problems in coping with this high current transmission demand.

[0003] Traditional solutions often use 0.6-1kV low-voltage cables. Even with the largest 400mm² specification, their current-carrying capacity is insufficient for high-current transmission requirements, often necessitating the use of double or even multiple cables to increase current-carrying capacity. However, increasing the number of cables leads to more potential fault points, increasing the risk of power loss and potentially causing fires and other safety hazards. Furthermore, burying multiple cables underground requires wider excavations, increasing construction difficulty and significantly raising the budget, placing a heavy burden on the construction and maintenance of the entire project. Utility Model Content

[0004] The purpose of this application is to provide a power transmission and distribution system that effectively reduces the number of cables and the number of fault points by using a closed, dense busbar trunking buried underground and a sealing device. At the same time, it avoids the problems of increased civil engineering excavation width and increased construction difficulty caused by burying multiple cables underground.

[0005] To achieve the above objectives, this application provides a power transmission and distribution system, comprising:

[0006] Positioning device, buried in the underground busbar trunking;

[0007] A closed-type compact busbar trunking, located within a busbar trunking cavity, is positioned and fixed by the positioning device. The closed-type compact busbar trunking includes:

[0008] Busbar trunking body;

[0009] A busbar is provided on the main body of the busbar trunking. The portion of the busbar located inside the main body of the busbar trunking is sealed with insulating material, and the portion of the busbar located outside the main body of the busbar trunking can be connected to power transmission and distribution components.

[0010] The power transmission and distribution system also includes:

[0011] A sealing device is provided at the end of the enclosed dense busbar trunking. The sealing device uses a sealing material to seal the portion of the busbar trunking located outside the main body of the busbar trunking.

[0012] In some embodiments, the number of busbar trunking busbars is at least two; the power transmission and distribution system further includes:

[0013] An insulating device is provided between adjacent busbar trunking busbars.

[0014] In some embodiments, the portion of the busbar located outside the main body of the busbar trunking includes:

[0015] The connector is wrapped with insulating material on the outside;

[0016] An electrical conductor is connected to the connector, and the electrical conductor is capable of connecting power transmission and distribution components;

[0017] The power transmission and distribution system also includes:

[0018] An insulating device is provided on the electrical conductor.

[0019] In some embodiments, the projection area of ​​the electrical conductor on the plane where the insulating device is located falls entirely within the outline of the insulating device.

[0020] In some embodiments, the power transmission and distribution component includes:

[0021] Busbar trunking, connected to the enclosed, dense busbar trunking;

[0022] The sealing device uses a sealing material to seal the connection between the busbar trunking and the enclosed dense busbar trunking.

[0023] In some embodiments, the power transmission and distribution component includes:

[0024] Power cables are connected to the enclosed, dense busbar trunking;

[0025] The sealing device uses a sealing material to seal the connection between the power cable and the enclosed dense busbar trunking.

[0026] In some embodiments, the power transmission and distribution system further includes:

[0027] A protective device is fitted onto the power cable, and the protective device is located outside the sealing device.

[0028] In some embodiments, the sealing device utilizes epoxy resin as the sealing material, and the sealing device is formed by casting epoxy resin.

[0029] In some embodiments, the number of positioning devices is multiple, and the multiple positioning devices are arranged linearly in the busbar cavity, and the multiple positioning devices are spaced apart in the arrangement direction.

[0030] In some embodiments, a concrete pad is provided at the bottom of the busbar trunking cavity, and the positioning device and the enclosed dense busbar trunking are located on the upper side of the concrete pad.

[0031] Compared to the aforementioned background technology, the power transmission and distribution system provided in this application mainly includes a positioning device, a closed-type dense busbar trunking, and a sealing device. The positioning device is buried in the underground busbar trunking cavity. The closed-type dense busbar trunking is located in the busbar trunking cavity and is positioned and fixed by the positioning device. The closed-type dense busbar trunking includes a busbar trunking body and a busbar trunking busbar. The busbar trunking busbar is located in the busbar trunking body. The portion of the busbar trunking busbar located inside the busbar trunking body is sealed with insulating material, and the portion of the busbar trunking busbar located outside the busbar trunking body can connect to power transmission and distribution components. The sealing device is located at the end of the closed-type dense busbar trunking and uses sealing material to seal the portion of the busbar trunking busbar located outside the busbar trunking body.

[0032] In traditional power transmission and distribution systems, the laying of multiple cables not only increases the number of fault points, leading to increased risks of power loss and safety hazards, but also requires wider civil engineering excavations when laying cables underground, further increasing construction difficulty and costs.

[0033] To address the aforementioned problems, this application provides an innovative power transmission and distribution system. The core of this system lies in replacing traditional cables with enclosed, dense busbar trunking buried underground, and fixing it within the trunking cavity using a positioning device. The enclosed, dense busbar trunking consists of a main trunking body and busbar busbars. The portion of the busbar busbars located inside the main trunking body is sealed with insulating material, ensuring its electrical safety and stability in the underground environment. The portion of the busbar busbars located outside the main trunking body connects to power transmission and distribution components, enabling efficient power transmission.

[0034] In addition, the system is equipped with a sealing device located at the end of the enclosed, high-density busbar trunking. This device uses sealing material to seal the portion of the busbars located outside the main body of the busbar trunking. This sealing design not only further enhances the system's waterproof and moisture-proof performance but also effectively prevents electrical faults caused by external environmental factors.

[0035] By adopting this design, power transmission and distribution systems can replace the traditional method of laying multiple cables with a single enclosed, dense busbar trunking. This not only significantly reduces the number of cables and the number of fault points, but also avoids the problems of increased excavation width and construction difficulty caused by burying multiple cables underground.

[0036] Based on the above structural and process descriptions, it can be seen that the power transmission and distribution system has at least the following beneficial effects: By adopting underground enclosed dense busbar trunking and sealing devices, the power transmission and distribution system effectively reduces the number of cables and the number of fault points, while avoiding the problems of increased civil engineering excavation width and increased construction difficulty caused by laying multiple cables underground. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 A cross-sectional view of a power transmission and distribution system provided in an embodiment of this application;

[0039] Figure 2 A plan view of the power transmission and distribution system provided in the embodiments of this application;

[0040] Figure 3 A connection diagram of a closed-type dense busbar trunking provided in an embodiment of this application;

[0041] Figure 4 Another connection diagram of the enclosed dense busbar trunking provided in the embodiments of this application;

[0042] Figure 5 This is a schematic diagram of a power cable provided in an embodiment of this application.

[0043] in:

[0044] Power transmission and distribution system 100

[0045] Positioning device 1

[0046] 2. Enclosed compact busbar trunking; 21. Busbar trunking body; 22. Busbar trunking busbars; 221. Connector; 222. Electrical conductor.

[0047] Sealing device 3

[0048] Insulation device 4

[0049] Busbar 5

[0050] 6. Power cables

[0051] Busbar trough 01, concrete cushion layer 02, first area 03, second area 04, rebar anchoring 05, circular cable marker 06. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] Please refer to Figures 1 to 3 ,in, Figure 1 This is a cross-sectional view of the power transmission and distribution system provided in an embodiment of this application. Figure 2 This is a plan view of the power transmission and distribution system provided in the embodiments of this application. Figure 3 This is a connection diagram of a closed-type dense busbar trunking provided in an embodiment of this application.

[0055] In a first specific embodiment, the power transmission and distribution system 100 provided in this application mainly includes a positioning device 1, a closed-type dense busbar trunking 2, and a sealing device 3.

[0056] The power transmission and distribution system 100 is buried underground. Specifically, the positioning device 1 is buried in the underground busbar trunking cavity 01; the enclosed compact busbar trunking 2 is located in the busbar trunking cavity 01. The enclosed compact busbar trunking 2 is positioned and fixed by the positioning device 1. The enclosed compact busbar trunking 2 includes a busbar trunking body 21 and a busbar trunking busbar 22. The busbar trunking busbar 22 is located in the busbar trunking body 21. The part of the busbar trunking busbar 22 located inside the busbar trunking body 21 is sealed with insulating material. The part of the busbar trunking busbar 22 located outside the busbar trunking body 21 can connect to the power transmission and distribution components; the sealing device 3 is located at the end of the enclosed compact busbar trunking 2. The sealing device 3 uses sealing material to seal the part of the busbar trunking busbar 22 located outside the busbar trunking body 21.

[0057] In traditional power transmission and distribution systems, the laying of multiple cables not only increases the number of fault points, leading to increased risks of power loss and safety hazards, but also requires wider civil engineering excavations when laying cables underground, further increasing construction difficulty and costs.

[0058] To address the aforementioned problems, this application provides an innovative power transmission and distribution system 100. The core of this system 100 lies in replacing traditional cables with enclosed, dense busbar trunking 2 buried underground, and fixing it within the busbar trunking cavity 01 using a positioning device 1. The enclosed, dense busbar trunking 2 consists of a busbar trunking body 21 and busbar trunking busbars 22. The portion of the busbar trunking busbars 22 located inside the busbar trunking body 21 is sealed with insulating material, ensuring its electrical safety and stability in the underground environment. The portion of the busbar trunking busbars 22 located outside the busbar trunking body 21 connects to power transmission and distribution components, enabling efficient power transmission.

[0059] In addition, the system 100 is equipped with a sealing device 3, which is located at the end of the enclosed compact busbar trunking 2. This device 3 uses sealing material to seal the portion of the busbar trunking 22 located outside the main body 21 of the busbar trunking. This sealing design not only further enhances the system's waterproof and moisture-proof performance, but also effectively prevents electrical faults caused by external environmental factors.

[0060] By adopting this design, the power transmission and distribution system 100 can replace the traditional method of laying multiple cables with a single enclosed, dense busbar trunking 2. This not only significantly reduces the number of cables and the number of fault points, but also avoids the problems of increased civil engineering excavation width and construction difficulty caused by burying multiple cables underground.

[0061] Based on the above structural and process descriptions, it can be seen that the power transmission and distribution system 100 has at least the following beneficial effects: By adopting a closed-type dense busbar trunking 2 and a sealing device 3 buried underground, the power transmission and distribution system 100 effectively reduces the number of cables and the number of fault points, while avoiding the problems of increased civil engineering excavation width and increased construction difficulty caused by the burial of multiple cables.

[0062] It should be noted that this embodiment does not limit the specific form of the power transmission and distribution components. For example, the power transmission and distribution components can be another enclosed dense busbar trunking 2, thereby increasing the length of the power transmission and distribution lines of the power transmission and distribution system 100 by increasing the number of enclosed dense busbar trunking 2; the power transmission and distribution components can also be cables to facilitate current convergence and connect the outgoing cables of power equipment such as inverters to the power transmission and distribution system 100; whatever the specific form, it should fall within the scope of this embodiment.

[0063] In some embodiments, the power transmission and distribution components include:

[0064] Busbar 5 is connected to enclosed compact busbar 2;

[0065] Among them, the sealing device 3 uses sealing material to seal the connection position between the busbar trunking 5 and the enclosed dense busbar trunking 2.

[0066] In this embodiment, the power transmission and distribution system 100 includes a busbar trunking 5 connected to a closed, dense busbar trunking 2 for the transmission and distribution of electrical energy. This connection method provides the power transmission and distribution system 100 with flexible expansion capabilities, allowing for the extension of power transmission and distribution lines or the addition of branch lines according to actual needs.

[0067] Busbar trunking 5 can adopt the same structural form as the enclosed compact busbar trunking 2, which means that the two are highly compatible in design and function. Through this identical structural design, the connection between busbar trunking 5 and the enclosed compact busbar trunking 2 is more stable and reliable, effectively ensuring the continuity and stability of power transmission. At the same time, this design also facilitates system installation and maintenance, reducing construction difficulty and cost.

[0068] To ensure the sealing and reliability of the connection, a sealing device 3 is installed at the connection point between the busbar trunking 5 and the enclosed compact busbar trunking 2. The sealing device 3 uses sealing material to seal the connection, effectively preventing the intrusion of moisture, dust, and other external impurities. This sealing measure not only enhances the system's waterproof and moisture-proof performance but also improves the insulation performance of the connection, further reducing the risk of electrical failures caused by environmental factors, thereby extending the system's service life and improving its operational safety and stability.

[0069] Please refer to Figure 4 and Figure 5 , Figure 4 This is another connection diagram of the enclosed, dense busbar trunking provided in an embodiment of this application. Figure 5 This is a schematic diagram of a power cable provided in an embodiment of this application.

[0070] In some embodiments, the power transmission and distribution components include:

[0071] Power cable 6 is connected to enclosed high-density busbar trunking 2;

[0072] Among them, the sealing device 3 uses sealing material to seal the connection position between the power cable 6 and the enclosed dense busbar trunking 2.

[0073] In this embodiment, the power transmission and distribution components of the power transmission and distribution system 100 use power cables 6 as connecting components, which are connected to the enclosed dense busbar trunking 2 to realize the transmission of electrical energy between power equipment and the power transmission and distribution system. This design provides the system with another flexible way of implementing power transmission and distribution, which can meet the connection requirements in different scenarios.

[0074] Power cables 6, as a common power transmission and distribution component, possess excellent flexibility and adaptability, enabling convenient connection of various power devices (such as inverters) to the power transmission and distribution system 100. Through the connection of power cables 6 to the enclosed, dense busbar trunking 2, the system can achieve efficient power transmission and distribution while maintaining system integrity and stability. This connection method is particularly suitable for scenarios requiring the connection of distributed power equipment to the main power transmission and distribution lines, facilitating system expansion and equipment integration.

[0075] To ensure the sealing and reliability of the connection, a sealing device 3 is installed at the connection point between the power cable 6 and the enclosed high-density busbar 2. The sealing device 3 uses sealing material to seal the connection, effectively preventing the intrusion of moisture, dust, and other external impurities. This sealing measure not only enhances the system's waterproof and moisture-proof performance but also improves the insulation performance of the connection, further reducing the risk of electrical failures caused by environmental factors, thereby extending the system's service life and improving its operational safety and stability.

[0076] It should be noted that the design of the sealing device 3 will vary depending on the different power transmission and distribution components, to adapt to the geometry and sealing requirements of different connection points. For example, when the sealing device 3 is used to seal the connection between the enclosed compact busbar trunking 2 and the busbar trunking 5, its structure is usually set to conform to the cross-sectional shape of the busbar trunking (such as a square), for example, a box-shaped structure. This design ensures that the sealing device 3 fits tightly with the connection point of the busbar trunking, thereby achieving a good sealing effect.

[0077] Alternatively, when the sealing device 3 is used to seal the connection between the enclosed busbar trunking 2 and the power cable 6, its structure is designed according to the cross-sectional shape of the power cable 6 (usually circular), for example, using a columnar structure. This structural form can better match the shape of the power cable 6, thereby forming an effective seal at the connection point.

[0078] Regardless of whether a box-shaped or columnar structure is adopted, the design goal of the sealing device 3 is to improve the sealing performance of the connection points and ensure the system's waterproof, moisture-proof, and insulation performance. Through this flexible design, the sealing device 3 can adapt to the connection requirements of different power transmission and distribution components, ensuring the system's stability and reliability. Therefore, this embodiment does not impose specific limitations on the specific structural form of the sealing device 3, in order to adapt to different application scenarios and needs.

[0079] In some embodiments, the power transmission and distribution system 100 further includes:

[0080] The protective device is fitted onto the power cable 6 and is located outside the sealing device 3.

[0081] In this embodiment, this design provides additional physical protection for the power cable 6, ensuring its safe and stable operation in complex underground environments.

[0082] The protective device can take the form of a cable protection conduit, typically made of high-strength plastic, metal, or other corrosion-resistant materials. The cable protection conduit is fitted over the power cable 6, effectively resisting external mechanical damage, chemical corrosion, and soil pressure, thereby extending the service life of the power cable 6. Simultaneously, the protective device is located outside the sealing device 3. This structural layout not only provides double protection for the power cable 6 but also ensures that the sealing performance of the sealing device 3 is not affected by external factors, further enhancing the overall reliability of the system.

[0083] Since the protection device is also located underground, its design and material selection fully consider the characteristics of the underground environment, enabling it to adapt to different soil conditions and construction requirements. By installing the protection device, the power transmission and distribution system 100 not only improves the safety of power transmission and distribution but also provides strong protection for the long-term stable operation of the power cables 6. Therefore, the introduction of the protection device in this embodiment provides important support for the reliability and durability of the system.

[0084] In some embodiments, the sealing device 3 utilizes epoxy resin as the sealing material, and the sealing device 3 is formed by casting epoxy resin.

[0085] In this embodiment, epoxy resin is a high-performance insulating material with excellent mechanical strength, electrical insulation properties and chemical corrosion resistance, which can effectively meet the requirements of the power transmission and distribution system 100 for sealing and reliability in underground environments.

[0086] The sealing device 3, formed by casting epoxy resin, can tightly fit the connection between the busbar 22 and the power transmission and distribution components (such as the busbar 5 or power cable 6), achieving good waterproof, moisture-proof, and dustproof effects. This sealing method not only enhances the insulation performance of the system but also effectively prevents electrical faults caused by external environmental factors, such as short circuits or grounding faults, thereby improving the safety and stability of the power transmission and distribution system.

[0087] Furthermore, the curing properties of epoxy resin enable it to form a robust protective layer at the connection points, further enhancing the mechanical strength of the system. This sealing device 3 is designed not only for connections between the busbar 22 and the busbar 5, but also for connections between the busbar 22 and the power cable 6, demonstrating its wide applicability.

[0088] Therefore, in this embodiment, epoxy resin is used as the sealing material, and the sealing device 3 formed by the casting process provides an efficient and reliable sealing solution for the power transmission and distribution system 100, which significantly improves the overall performance and service life of the system.

[0089] In some embodiments, the number of busbars 22 is at least two; the power transmission and distribution system 100 further includes:

[0090] Insulation device 4 is installed between adjacent busbars 22.

[0091] In this embodiment, the number of busbars 22 in the enclosed dense busbar trunking 2 of the power transmission and distribution system 100 is at least two to meet the system's requirements for multi-phase power transmission or higher current capacity. To ensure electrical isolation and insulation performance between the busbars 22, the power transmission and distribution system 100 also includes an insulation device 4, which is disposed between adjacent busbars 22.

[0092] The specific structural form of the insulation device 4 is not limited; it can be made of insulating boards, insulating sheets, or other similar insulating materials. These insulating materials typically have excellent electrical insulation properties, effectively preventing current leakage between adjacent busbars 22 and thus avoiding short-circuit faults. Furthermore, the insulation device 4 also provides a certain buffering and protection between the busbars 22, reducing contact or damage between them caused by mechanical vibration or external impact, further improving the reliability and stability of the system.

[0093] Regardless of its specific form, the insulation device 4 is designed to ensure the electrical safety and stability of the power transmission and distribution system 100 during operation, while extending the system's service life, through its insulation characteristics. Therefore, this embodiment does not impose specific limitations on the specific structural form of the insulation device 4, in order to adapt to different application scenarios and design requirements.

[0094] In some embodiments, the portion of the busbar 22 located outside the busbar body 21 includes:

[0095] Connector 221 is externally wrapped with insulating material;

[0096] Electrical conductor 222 is connected to connector 221 and can connect to power transmission and distribution components;

[0097] The power transmission and distribution system 100 also includes:

[0098] Insulation device 4 is provided on electrical conductor 222.

[0099] In this embodiment, the portion of the busbar 22 located outside the main body 21 of the busbar trunking specifically includes a connector 221 and an electrical conductor 222. The connector 221 is externally wrapped with insulating material. This design not only ensures the electrical insulation performance of the connector 221 when connected to the main body 21 of the busbar trunking, but also effectively prevents current leakage from the connection point, thereby ensuring the safety of the system. The electrical conductor 222 is connected to the connector 221, and its main function is to serve as an extension of the busbar 22, used for electrical connection with power transmission and distribution components (such as the busbar trunking 5 or power cables 6) to achieve efficient power transmission.

[0100] To further improve the insulation performance and reliability of the system, the power transmission and distribution system 100 also includes an insulation device 4, whose placement is flexible. On one hand, the insulation device 4 can be located outside the conductor 222, directly insulating and protecting it to prevent current leakage and short circuits. On the other hand, when there are multiple busbars 22, the insulation device 4 can also be placed between adjacent conductors 222 to isolate them and prevent electrical contact, thereby further enhancing the system's insulation performance.

[0101] This embodiment does not limit the specific structural form of the insulation device 4, which can be made of insulating board, insulating sheet, or other similar insulating materials. These materials generally have excellent electrical insulation properties, effectively preventing current leakage and short circuits, while also providing a certain degree of buffering and protection, reducing contact or damage between conductors 222 caused by mechanical vibration or external impact. Regardless of the specific form used, the design of the insulation device 4 aims to ensure the electrical safety and stability of the power transmission and distribution system 100 during operation through its insulation characteristics, while extending the system's service life. Therefore, whether the insulation device 4 is located on the outside of the conductor 222 or between adjacent conductors 222, it is within the scope of this embodiment.

[0102] In some embodiments, the projection area of ​​the electrical conductor 222 on the plane where the insulating device 4 is located falls entirely within the outline of the insulating device 4.

[0103] In this embodiment, the positional relationship between the electrical conductor 222 and the insulating device 4 is specially designed to ensure that the projection area of ​​the electrical conductor 222 on the plane where the insulating device 4 is located falls completely within the outline of the insulating device 4. This design means that the electrical conductor 222 is completely covered and wrapped by the insulating device 4, thereby achieving effective isolation between the electrical conductor 222 and the external environment.

[0104] Through this structural design, the insulation device 4 provides comprehensive insulation protection for the conductor 222, preventing current leakage from the conductor 222 to the external environment. It also prevents external conductive substances or liquids from contacting the conductor 222 and causing short circuits or other electrical faults. This design not only enhances the electrical safety of the power transmission and distribution system 100 but also improves the system's reliability, especially in humid or corrosive environments.

[0105] Furthermore, this design provides physical protection for the electrical conductor 222, preventing it from being damaged by external mechanical forces. Since the electrical conductor 222 is entirely within the outline of the insulation device 4, the risk of accidental impact or abrasion during installation, maintenance, or operation is significantly reduced. This structural layout not only optimizes the insulation performance of the system but also enhances its overall durability and service life.

[0106] It should be noted that the installation method of the insulation device 4 is highly flexible to adapt to different application scenarios and design requirements. For example, the insulation device 4 can be fixed to the electrical conductor 222 by fastener connection, thereby achieving reliable insulation protection. The fastener connection method is not only easy to operate, but also ensures a tight fit between the insulation device 4 and the electrical conductor 222, effectively preventing current leakage and short circuits.

[0107] Furthermore, the installation method of the insulation device 4 is not limited to fastener connection; other methods such as adhesive bonding and snap-fit ​​connection can also be used. These different installation methods can all meet the system's insulation performance requirements while also considering ease of installation and economy. Regardless of the installation method used, the core function of the insulation device 4 is always to prevent current leakage and short circuits, while providing buffering and protection for the electrical conductor 222.

[0108] Therefore, this embodiment does not limit the specific installation method of the insulation device 4, so as to ensure that the designer can choose the most suitable installation method according to actual needs, thereby achieving the best insulation effect and system performance.

[0109] In some cases, the power cable 6 is fixed to the busbar 22 of the enclosed compact busbar trunking 2 via terminals. The connection must be secure. After fixing, an insulation device 4 is installed, and after forming the insulation layer, epoxy resin is poured throughout to form a sealing device 3. After the connection is completed, a megohmmeter is used to test the insulation resistance of the enclosed compact busbar trunking 2 to ensure that the insulation resistance value meets relevant standards and requirements. If the insulation resistance value is abnormal, the cause needs to be found and the process repeated until the test is passed.

[0110] In some cases, the busbar trunking body 21 includes an epoxy resin shell, inside which is a busbar trunking busbar 22, which is sealed by resin casting.

[0111] Waterproof, enclosed, high-density busbar trunking, specially designed and treated, can be buried underground. For example, resin-cast fully enclosed busbar trunking uses a specially formulated composite resin and a fixed amount of mixed materials to create a high-performance insulating material. Copper or aluminum busbars are directly cast and sealed, achieving an IP68 protection rating and exhibiting excellent water resistance, fire resistance, and corrosion resistance. This type of busbar trunking effectively prevents the intrusion of moisture and humidity, as well as corrosion from chemicals in the soil. It can operate reliably for extended periods even under continuous immersion in water and can be directly laid in cable trenches or buried underground.

[0112] In some embodiments, the number of positioning devices 1 is multiple, and the multiple positioning devices 1 are linearly arranged in the busbar cavity 01, and the multiple positioning devices 1 are spaced apart in the arrangement direction.

[0113] In this embodiment, multiple positioning devices 1 are spaced apart along the extension direction of the busbar cavity 01, thereby providing stable support and positioning for the enclosed dense busbar 2. This spaced arrangement not only ensures the straightness of the enclosed dense busbar 2 within the busbar cavity 01, but also reduces material usage to a certain extent, improving the system's economy.

[0114] As an optional implementation, the positioning device 1 can take the form of a closed-type dense busbar trunking sleeper made of composite material. This composite material has excellent mechanical properties and durability, and can effectively resist the influence of soil pressure, humid environment and other external factors. By using a busbar trunking sleeper made of composite material, the positioning device 1 can accurately position and fix the closed-type dense busbar trunking 2 within the busbar trunking cavity 01, ensuring that the busbar trunking remains stable and straight during the operation of the entire power transmission and distribution system 100.

[0115] Furthermore, this design facilitates installation and maintenance, as the busbar supports can be flexibly adjusted and arranged according to the actual size and shape of the busbar cavity 01. Through multiple spaced positioning devices 1, the enclosed, dense busbar 2 can maintain a straight state within the busbar cavity 01, thereby reducing the risk of electrical faults caused by bending or deformation of the busbar, and also providing reliable physical support for the long-term stable operation of the system.

[0116] In some embodiments, a concrete pad 02 is provided at the bottom of the busbar cavity 01, and the positioning device 1 and the enclosed dense busbar 2 are located on the upper side of the concrete pad 02.

[0117] In this embodiment, a concrete pad 02 is provided at the bottom of the busbar trunking cavity 01 to provide a stable foundation for the entire power transmission and distribution system 100. The positioning device 1 and the enclosed, dense busbar trunking 2 are both installed on the upper side of the concrete pad 02. This design, through the supporting effect of the concrete pad 02, ensures the stability and reliability of the busbar trunking system in the underground environment.

[0118] The concrete cushion layer 02 effectively disperses soil pressure, preventing damage to the enclosed dense busbar trunking 2 caused by uneven soil settlement at the bottom of the busbar trunking cavity 01. Simultaneously, the concrete cushion layer 02 possesses excellent compressive strength and durability, capable of bearing the weight of the enclosed dense busbar trunking 2 and its internal power transmission components for extended periods, thus ensuring the long-term stable operation of the system.

[0119] Furthermore, installing the positioning device 1 and the enclosed compact busbar trunking 2 on the upper side of the concrete pad 02 helps maintain the overall flatness and straightness of the busbar trunking system. The positioning device 1, combined with the concrete pad 02, can more effectively fix and support the enclosed compact busbar trunking 2, preventing displacement or deformation during operation, thereby ensuring the safety and reliability of power transmission.

[0120] Therefore, by setting a concrete pad 02 at the bottom of the busbar trunking cavity 01 and installing the positioning device 1 and the enclosed dense busbar trunking 2 on its upper side, this embodiment provides a stable and reliable installation foundation for the power transmission and distribution system 100, which significantly improves the overall performance and service life of the system.

[0121] In one specific implementation, the process of deploying the power transmission and distribution system 100 by digging deep trenches underground is described below.

[0122] 1. During excavation, the slope is laid out at a ratio of 1:0.25 (if the soil quality is poor, the slope ratio needs to be adjusted accordingly or the retaining plate support should be used). After the deep trench is opened to a sufficient depth, the soil at the bottom of the trench is compacted and leveled. Then, a concrete cushion layer 02 is set up, and a busbar cavity 01 is formed on the upper side of the concrete cushion layer 02.

[0123] 2. A closed-type dense busbar trunking 2 is installed in the busbar trunking cavity 01. The closed-type dense busbar trunking 2 must be kept straight. A composite material closed-type dense busbar trunking pillow (positioning device 1) is used to position and fix the closed-type dense busbar trunking 2.

[0124] 3. The upper side of busbar trough 01 is the second area 04, which is filled with stone powder and compacted. It needs to be compacted by sprinkling water layer by layer at 200mm intervals.

[0125] 4. The area above the second area 04 is the first area 03, where road surface repair is carried out. Backfilling is required to make it level with the road surface. When the road surface conditions are inconsistent, repairs should be carried out according to the actual road surface conditions. When the allowable bearing capacity of the subgrade foundation soil is ≤80kN / m², the subgrade needs to be reinforced. When the road surface thickness is restored to 200mm or more, rebar anchoring should be considered. On the road surface, circular cable markers 06 should be installed approximately every 20 meters along the direction of the power transmission and distribution system 100.

[0126] In one specific implementation, the power transmission and distribution system 100 provided in this application uses resin-cast fully enclosed busbar trunking, either buried or overhead, which can completely replace cables and is not limited by current carrying capacity. Corresponding conductor materials and sizes are selected for the corresponding current, solving problems such as excessive cable count and complex construction. Furthermore, if a section of the busbar trunking fails, it is not necessary to replace the entire trunking; only the two ends of a new section of busbar trunking need to be replaced by connecting them.

[0127] It should be noted that many of the components mentioned in this application are general standard parts or components known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0128] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0129] The power transmission and distribution system provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A power transmission and distribution system, characterized in that, include: Positioning device, buried in the underground busbar trunking; A closed-type compact busbar trunking, located within a busbar trunking cavity, is positioned and fixed by the positioning device. The closed-type compact busbar trunking includes: Busbar trunking body; A busbar is provided on the main body of the busbar trunking. The portion of the busbar located inside the main body of the busbar trunking is sealed with insulating material, and the portion of the busbar located outside the main body of the busbar trunking can be connected to power transmission and distribution components. The power transmission and distribution system also includes: A sealing device is provided at the end of the enclosed dense busbar trunking. The sealing device uses a sealing material to seal the portion of the busbar trunking located outside the main body of the busbar trunking.

2. The power transmission and distribution system according to claim 1, characterized in that, The number of busbars in the busbar trunking is at least two; the power transmission and distribution system also includes: An insulating device is provided between adjacent busbar trunking busbars.

3. The power transmission and distribution system according to claim 1, characterized in that, The portion of the busbar located outside the main body of the busbar includes: The connector is wrapped with insulating material on the outside; An electrical conductor is connected to the connector, and the electrical conductor is capable of connecting power transmission and distribution components; The power transmission and distribution system also includes: An insulating device is provided on the electrical conductor.

4. The power transmission and distribution system according to claim 3, characterized in that, The projection area of ​​the electrical conductor on the plane where the insulating device is located falls completely within the outline of the insulating device.

5. The power transmission and distribution system according to claim 1, characterized in that, The power transmission and distribution components include: Busbar trunking, connected to the enclosed, dense busbar trunking; The sealing device uses a sealing material to seal the connection between the busbar trunking and the enclosed dense busbar trunking.

6. The power transmission and distribution system according to claim 1, characterized in that, The power transmission and distribution components include: Power cables are connected to the enclosed, dense busbar trunking; The sealing device uses sealing material to seal the connection between the power cable and the enclosed dense busbar trunking.

7. The power transmission and distribution system according to claim 6, characterized in that, Also includes: A protective device is fitted onto the power cable, and the protective device is located outside the sealing device.

8. The power transmission and distribution system according to claim 1, characterized in that, The sealing device utilizes epoxy resin as the sealing material, and is formed by casting epoxy resin.

9. The power transmission and distribution system according to claim 1, characterized in that, The number of positioning devices is multiple, and the multiple positioning devices are arranged linearly in the busbar cavity, and the multiple positioning devices are spaced apart in the arrangement direction.

10. The power transmission and distribution system according to claim 1, characterized in that, The bottom of the busbar trunking cavity is provided with a concrete pad, and the positioning device and the enclosed dense busbar trunking are located on the upper side of the concrete pad.

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