Self-loading and unloading load transfer equipment

Abstract

The invention discloses self-loading and unloading load transfer equipment, relates to the technical field of electric power, and aims to solve the difficulty in inputting manpower and material resources and arriving at a destination in a traditional emergency power generation vehicle and a power generator. The equipment comprises a trailer, and a transformer is arranged on the trailer. The low-voltage side of the transformer is connected with a low-voltage cable through a cable quick connector, and the high-voltage side of the transformer is connected with a high-voltage cable through a high- The equipment is provided with an intelligent circuit breaker and a disconnecting link, so that safe and efficient power transfer is ensured. Meanwhile, the trailer adopts an electric hydraulic lifting design, so that self-loading and unloading are convenient. An electric cabinet is installed at the radiator, a connector and an intelligent circuit breaker are arranged in the radiator, the remote control function is achieved, and operation flexibility and safety are improved. The protective cover is arranged at the top of the transformer, external damage is prevented, the protective cover is made of corrosion-resistant materials, and the service life of equipment is prolonged. The equipment can realize temporary power supply, is especially suitable for withdrawing and maintenance operation of a transformer in a transformer area, and improves the efficiency and reliability of power supply guarantee.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a self-loading and unloading load transfer device. Background Art

[0002] With the continuous growth of electricity demand and the gradual expansion of distribution networks, power supply reliability has become a crucial indicator in modern power systems. Especially in mountainous areas such as Yunnan, due to the complexity of the terrain, the power supply radius of medium-voltage lines is often long, which brings many challenges to the stable supply of electricity. In actual operations, power outages caused by substation failures or maintenance frequently occur, causing great inconvenience and losses to users. Traditional emergency power generation solutions, such as power trucks and generators, can provide emergency power in a short time, but their disadvantages such as inconvenient transportation, large size and capacity limitations limit their application in some areas.

[0003] The specific problems are as follows:

[0004] The need for uninterrupted power supply: When carrying out engineering and technical transformation, inspection and repair of distribution network lines, how to ensure that users are not affected during power outages. Traditional operation methods often require power outages, resulting in a large number of users being unable to use electricity normally, which is a basic requirement for power supply services in modern society.

[0005] High cost of manpower and material resources: Traditional emergency power generation solutions usually require a lot of manpower and material resources, with low operating efficiency and high costs.

[0006] Adapt to complex substation environment: The power construction environment in Yunnan is diverse, and many substations cannot use traditional large-scale equipment due to geographical conditions.

[0007] Operation safety: Safety is always the top priority in power distribution network operations. When connecting lines, how to disconnect the load current in time to ensure the safety of operators and reduce potential operational risks.

[0008] In summary, there is an urgent need for a self-loading and unloading load transfer equipment to improve the reliability of power supply, reduce operating costs, and ensure operational safety. Summary of the invention

[0009] In view of the maintenance and power supply failure in the terminal area of ​​the distribution network, emergency power generation vehicles and generators require a lot of manpower and material resources to ensure power supply, and it is difficult for them to reach their destination. In this paper, a self-loading and unloading load transfer equipment with a universal size for small vehicles is developed.

[0010] The technical solution adopted by the present invention is:

[0011] A self-loading and unloading load transfer device, the self-loading and unloading load transfer device comprises a trailer, a transformer is installed on the trailer, a low-voltage side of the transformer can be connected to a low-voltage cable through a low-voltage side terminal, and a high-voltage side of the transformer can be connected to a high-voltage cable through a high-voltage side terminal;

[0012] The low-voltage side terminal includes four groups of cable quick connectors capable of plugging low-voltage cables, an intelligent circuit breaker fixedly installed on the outside of the front side of the transformer, a knife switch and a low-voltage line connector fixedly installed on the front side of the top of the transformer; the intelligent circuit breaker is wired to the cable quick connector, the knife switch is wired to the intelligent circuit breaker, the four groups of low-voltage line connectors are wired to the knife switch, and the low-voltage line connector extends to the inside of the transformer and is electrically connected to the transformer;

[0013] The high-voltage side terminal includes three sets of high-voltage line connectors fixedly installed on the rear side of the top of the transformer. The high-voltage line connectors are connected to the high-voltage cables and extend into the interior of the transformer to be electrically connected to the transformer.

[0014] Furthermore, the trailer is an electric hydraulic lifting trailer.

[0015] Furthermore, an electric control box is installed at the front radiator of the transformer, and the cable quick connector and the intelligent circuit breaker are installed in the electric control box.

[0016] Furthermore, the electric control box is provided with a wiring window which can be opened or closed at a corresponding position of the cable quick connector.

[0017] Furthermore, a protective cover is provided on the top front side of the transformer, and the protective cover covers the knife switch.

[0018] Furthermore, the protective cover is made of corrosion-resistant material.

[0019] Furthermore, the intelligent circuit breaker is equipped with a remote controller, and the closing and opening of the intelligent circuit breaker can be remotely controlled by the remote controller.

[0020] Furthermore, the self-loading and unloading load transfer equipment is connected through a bypass to achieve temporary power supply during operation.

[0021] Furthermore, the self-loading and unloading load transfer equipment is used for evacuating and temporarily supplying power to transformers in maintenance work areas.

[0022] The self-loading and unloading load transfer equipment has the following significant beneficial effects:

[0023] 1. Automated loading and unloading, reducing manpower requirements: The electric hydraulic system of the lifting trailer realizes automatic lifting and loading and unloading of equipment, eliminating the need for manual handling, greatly reducing labor intensity and reducing dependence on human resources.

[0024] 2. Improve work efficiency: The self-loading and unloading design combined with quick connectors, intelligent circuit breakers and other components greatly simplifies the equipment loading and unloading and connection operation process, shortens the construction preparation time and power supply restoration time, and improves work efficiency.

[0025] 3. Enhance equipment flexibility: It can realize convenient transportation and flexible deployment of equipment, which is suitable for a variety of operating environments and maintenance needs, especially solving the "last mile" problem in remote areas or complex operating scenarios.

[0026] 4. Ensure power supply continuity: The temporary bypass power supply function continues to supply power to users during the withdrawal of the transformer for maintenance, reducing the impact of power outages caused by maintenance work and improving power supply reliability.

[0027] 5. Improved safety: Equipped with intelligent circuit breakers and knife switches, the power supply line can be operated manually or remotely to ensure safe opening and closing; the cable quick connector and protective cover design are effectively waterproof and anti-fouling, ensuring the long-term and reliable operation of the equipment.

[0028] 6. Modular design for easy maintenance and upgrade: The equipment adopts modular design, and the low-voltage side and high-voltage side terminals and transformers are clearly distributed, which is convenient for independent maintenance, replacement or upgrade of components.

[0029] 7. Durability and environmental adaptability: The application of protective cover and flip-type cable quick connector enhances the equipment's ability to resist rain and dirt, ensuring that the equipment can be used for a long time in harsh outdoor environments.

[0030] 8. The equipment has strong versatility: the high and low voltage terminals support standardized interfaces, are compatible with various types of high and low voltage cables, and have wide compatibility.

[0031] 9. Easy to operate and widely applicable: The equipment can be loaded and unloaded, connected and powered on without the need for professional technicians, which is suitable for the daily maintenance needs of grassroots power supply units.

[0032] 10. Reduce operating costs: Automation and modular design reduce the need for highly skilled operators during the operation process, while reducing the time and labor costs of equipment use and maintenance.

[0033] In summary, the self-loading and unloading load transfer equipment realizes efficient, safe and convenient load transfer functions, and at the same time has the characteristics of strong adaptability, easy operation and low cost, providing high-quality technical support for substation maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic diagram of the overall structure of the self-loading and unloading load transfer equipment of the present invention;

[0036] Figure 2 This is an installation position diagram of the intelligent circuit breaker and the cable quick connector of the present invention;

[0037] Figure 3 It is a schematic diagram of the top structure of the self-loading and unloading load transfer equipment of the present invention;

[0038] In the figure, 1 is high-voltage cable; 2 is electric control box; 3 is low-voltage cable; 4 is transformer; 5 is fixed frame; 6 is trailer; 7 is protective cover; 8 is high-voltage line connector; 9 is low-voltage line connector; 10 is knife switch; 11 is intelligent circuit breaker; 12 is cable quick connector. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0040] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0041] Traditional operation methods often require power outages, resulting in a large number of users being unable to use electricity normally, which is a basic requirement for power supply services in modern society; traditional emergency power generation solutions usually require a lot of manpower and material resources, with low operating efficiency and high costs; the power construction environment in Yunnan is diverse, and many substations cannot use traditional large-scale equipment due to geographical conditions; while connecting the lines, how to disconnect the load current in time, ensure the safety of the operators, and reduce potential operational risks. This embodiment proposes a self-loading and unloading load transfer equipment, which can be adapted to a variety of small vehicles and has its own trailer to solve the transportation problem, so that the equipment can be quickly transported to the substation for operation; the self-loading and unloading load transfer equipment uses a lightweight substation load transfer system to connect to the medium-voltage line, and after being processed by the equipment transformer, the transformer to be repaired in the substation is disconnected, and the equipment is continuously powered.

[0042] Specifically, Figure 1 As shown, the self-loading and unloading load transfer equipment includes a trailer 6, on which a transformer 4 is mounted via a fixing frame 5; wherein the trailer 6 is an electric hydraulic lifting trailer, and the transformer 4 and the trailer 6 are both commercially available finished equipment. The low-voltage side of the transformer 4 can be connected to the low-voltage cable 3 via the low-voltage side terminal, and the high-voltage side thereof can be connected to the high-voltage cable 1 via the high-voltage side terminal.

[0043] Furthermore, the low-voltage side wiring terminal and the high-voltage side wiring terminal in this embodiment are described in detail as follows:

[0044] like Figure 2 As shown, the low-voltage side terminal in this embodiment includes four groups of cable quick connectors 12 that can be plugged into the low-voltage cables 3, and an intelligent circuit breaker 11 fixedly installed on the front side of the transformer 4. The cable quick connector 12 can be a commercially available finished device, such as: TE Connectivity Amphe-Lite Series cable quick connector, and the intelligent circuit breaker 11 can be a commercially available finished device, such as: Schneider Electric ComPacT NSX series intelligent circuit breaker, and the intelligent circuit breaker 11 is wired to the four groups of cable quick connectors 12. In addition, the intelligent circuit breaker 11 is equipped with a remote controller, and the intelligent circuit breaker 11 can be remotely controlled by the remote controller to close and open; the remote controller can be a commercially available finished device, such as: Schneider Electric ECO component remote control module.

[0045] like Figure 3As shown, the low-voltage side terminal in this embodiment also includes a knife switch 10 and a low-voltage line connector 9 fixedly installed on the top front side of the transformer 4; the knife switch 10 can adopt commercially available finished equipment, such as: ABB OT series knife switch, and the low-voltage line connector 9 can adopt commercially available finished equipment, such as: Phoenix Contact UK series terminal blocks. The knife switch 10 is wired to the intelligent circuit breaker 11, and four groups of low-voltage line connectors 9 are wired to the knife switch 10. The low-voltage line connector 9 extends to the inside of the transformer 4 and is electrically connected to the transformer 4.

[0046] like Figure 1 and Figure 3 As shown, the high-voltage side terminal in this embodiment includes three sets of high-voltage line connectors 8 fixedly installed on the top rear side of the transformer 4. The high-voltage line connectors 8 can be commercially available finished equipment, such as: Raychem RTV high-voltage connectors. The high-voltage line connectors 8 are connected to the high-voltage cable 1 and extend to the inside of the transformer 4 to be electrically connected to the transformer 4.

[0047] The functions of the components in the self-loading and unloading load transfer equipment are as follows:

[0048] Trailer 6 adopts an electric hydraulic lifting trailer, which is controlled by an electric hydraulic system. After reaching the target height, the self-loading and unloading load transfer equipment is pushed into the vehicle for loading, and then the lifting frame is folded up to complete the equipment loading and transport the equipment; after arriving at the destination, the lifting frame is first pulled out and lowered to the ground. After ensuring stable grounding, the loading vehicle is moved to complete the unloading of the self-loading and unloading load transfer equipment, and finally the lifting frame is folded up to move the self-loading and unloading load transfer equipment to the designated location. The entire loading and unloading process does not require manual handling, which is convenient and labor-saving.

[0049] The cable quick connector 12 is used to quickly connect and disconnect the low-voltage cable 3, which is convenient for quickly establishing or disconnecting the electrical connection, improving work efficiency, and reducing manual operation time. When the power equipment is maintained or replaced, the cable connection and disconnection operation can be conveniently and safely performed.

[0050] The intelligent circuit breaker 11 is used to protect low-voltage circuits. It can automatically cut off the power supply when the load is too large or short-circuited to prevent equipment damage or safety accidents. It provides a remote control function, and the intelligent circuit breaker 11 can be operated by a remote controller away from the site. It can monitor and manage the current and improve the safety of electricity use.

[0051] The knife switch 10 is mainly used for connecting and disconnecting high-voltage circuits to ensure that the power supply can be reliably cut off when entering the maintenance or overhaul state. As an obvious manual electrical isolation device, it provides safety protection for electricians or maintenance personnel. When necessary, it can be used as a switching device for bypass connection to achieve temporary power supply.

[0052] The low voltage line connector 9 is used to connect the cable between the transformer 4 and the low voltage power supply to ensure that the electric energy is safely transmitted from the transformer 4 to the downstream equipment. It is designed to be able to plug and unplug quickly, which is convenient for maintenance and repair. The line connector can simplify the wiring and connection process of the equipment and improve the flexibility of the system.

[0053] The high voltage line connector 8 is used to connect the transformer 4 with the high voltage power supply to ensure the efficient transmission of high voltage power. It provides safe connection and disconnection of high voltage cables and is suitable for high voltage electrical engineering. It is designed to withstand high voltage without causing arc or short circuit, thus improving system safety.

[0054] Further, as a preferred technical solution of this embodiment, Figure 1 and Figure 2 As shown, in this embodiment, an electric control box 2 is installed at the front radiator of the transformer 4, and the cable quick connector 12 and the intelligent circuit breaker 11 are installed in the electric control box 2. Considering the convenience and quickness of connecting the low-voltage cable 3, in this embodiment, a wiring window that can be opened or closed is provided at the corresponding position of the cable quick connector 12 in the electric control box 2, which can effectively prevent water and dirt, and ensure durability and safety.

[0055] Furthermore, as a preferred technical solution of this embodiment, Figure 2 As shown, in this embodiment, a protective cover 7 is provided on the top front side of the transformer 4, and the protective cover 7 covers the knife switch 10. The protective cover 7 is made of corrosion-resistant material. The protective cover 7 plays a role in preventing rain and dirt, and protects the knife switch 10.

[0056] Based on the above self-loading and unloading load transfer equipment, this embodiment also proposes a method for realizing temporary power supply through bypass connection during operation, and the method specifically includes the following steps:

[0057] Preparation: Ensure that the self-loading and unloading load transfer equipment has arrived at the maintenance site and is in normal working condition. Check the equipment's electrical control box, intelligent circuit breaker, low-voltage line connector, and high-voltage line connector to ensure that all connectors are not damaged to avoid leakage.

[0058] Connect the low-voltage cable: Open the electric control box and connect the low-voltage cable to the low-voltage terminal of the transformer through the cable quick connector. Ensure that the connection is firm to avoid looseness or poor contact.

[0059] Connect high-voltage cables: Make sure that the high-voltage cables are well connected to the three sets of high-voltage cable connectors. Make sure that the high-voltage side connector is electrically connected to the high-voltage side of the transformer without damage or corrosion.

[0060] Setting up bypass connection: Determine the power supply line that needs to be bypassed, and ensure that the line load allows and can withstand temporary power supply needs. Use the wires corresponding to the bypass connection to connect the bypass line to the low-voltage side of the equipment. Ensure that the connection is clearly marked to avoid misoperation.

[0061] Enable the smart circuit breaker: Use the remote controller to start the smart circuit breaker and set its closing state to on. Confirm that the smart circuit breaker is working properly and the connection with the low-voltage line connector is unobstructed.

[0062] Provide temporary power supply: After confirming that all connections are stable, start to temporarily power the area through the bypass connection. Monitor the power supply to ensure that the voltage is stable and the current is within the safe range. During the work, continue to observe the status of the equipment and deal with any abnormalities immediately to ensure safety.

[0063] Maintenance and monitoring: During the maintenance of transformers in the substation, regularly check the temperature and operating status of all connection points to ensure that there is no overheating or abnormal noise. If there is a need for adjustment, the circuit should be closed and opened in time through the intelligent circuit breaker to ensure safe operation.

[0064] Steps after the operation is completed: Once the transformer maintenance is completed, immediately use the remote controller to open the intelligent circuit breaker and cut off the temporary power supply. Remove all connecting cables, ensure the site is clean, and properly store the self-loading and unloading load transfer equipment.

[0065] Through the above steps, the self-loading and unloading load transfer equipment can be effectively utilized to realize temporary power supply to the transformer in the maintenance work area through bypass connection, thus ensuring the smooth progress of maintenance work.

[0066] Based on the above self-loading and unloading load transfer equipment, this embodiment also proposes a method for withdrawing and temporarily supplying power to the transformer in the maintenance operation area, and the method includes the following steps:

[0067] Preparation stage: Confirm the model, specification and operating status of the transformer to be evacuated. Check the function and integrity of the self-loading and unloading load transfer equipment, including trailers, transformers, intelligent circuit breakers, switches and related connectors. Prepare the tools and instruments required for maintenance to ensure on-site safety.

[0068] Temporary power supply preparation: Drag the self-loading and unloading load transfer equipment to the designated location of the maintenance workbench. Connect the low-voltage cable to the cable quick connector on the low-voltage side terminal of the equipment to ensure that the connection is firm. Check all high-voltage and low-voltage lines connected to the equipment to ensure that they are not damaged and have good insulation. Open the electrical control box and check the circuit breaker and switch.

[0069] Switch power supply: remotely operate on the intelligent circuit breaker control system, first disconnect the original power supply line to ensure that the circuit is completely isolated. Use the intelligent circuit breaker to transfer the self-loading and unloading load to the regional load to achieve temporary power supply. After confirming that the temporary power supply is normal, monitor the current, voltage and other parameters to ensure the power supply quality.

[0070] Evacuate the transformer: After confirming that the temporary power supply is normal, gradually cut off the connections of the transformer to be evacuated: first cut off the low-voltage side connection, then cut off the high-voltage side connection. Use the electric hydraulic lifting function of the equipment to safely lift the transformer to be evacuated to avoid damage to the ground, and move it to the predetermined location.

[0071] Follow-up inspection: After removing the transformer, check the connection of the original transformer and temporary power supply equipment to ensure that all wiring meets safety standards. Clean up the site to ensure that there are no cables or equipment that pose potential safety hazards.

[0072] Power supply restoration: After completing the replacement or maintenance of the transformer, reconnect to the original power supply line. Check the connected power supply through the intelligent circuit breaker to ensure the safety of power restoration. Finally, conduct comprehensive electrical parameter monitoring to ensure that the restored power supply meets technical standards.

[0073] In summary, based on the self-loading and unloading load transfer equipment, the distribution network line engineering technical transformation, maintenance, emergency repair and other projects are completed, so that users can achieve the effect of no power outage during the maintenance period; for line overhaul technical transformation, infrastructure engineering and emergency treatment work, it can also achieve the effect of reducing the number of households with power outages, improve power supply reliability and the efficiency of live distribution network operations. The self-loading and unloading load transfer equipment has its own transportation and loading function, which can realize single-person loading and unloading, single-person operation, reduce manpower, material and capital investment, and is easy and quick to install, and the operation method saves time and effort. The self-loading and unloading load transfer equipment is designed for different substation scenes and small vehicles, and meets the 10kV voltage level. Compared with the substations that traditional operation equipment and operation methods cannot reach, this equipment can realize diversified substation scene operations and achieve efficient arrival operations. The self-loading and unloading load transfer equipment adopts a miniaturized switch isolation unit, which can be connected to the cable line, disconnect the load current at the same time, and has an obvious disconnection point to ensure the safety of the operation.

[0074] At the same time, it should be pointed out that the above description is only a typical embodiment of the present invention and does not limit the present invention in any form. Any changes made to the above embodiments based on the ideas and technical essence of the present invention are within the protection scope of the present invention.

Claims

1. A self-loading and unloading load transfer device, characterized in that: The self-loading and unloading load transfer equipment includes a trailer, on which a transformer is installed, the low-voltage side of the transformer can be connected to a low-voltage cable through a low-voltage side terminal, and the high-voltage side of the transformer can be connected to a high-voltage cable through a high-voltage side terminal; The low-voltage side terminal includes four groups of cable quick connectors capable of plugging low-voltage cables, an intelligent circuit breaker fixedly installed on the outside of the front side of the transformer, a knife switch and a low-voltage line connector fixedly installed on the front side of the top of the transformer; the intelligent circuit breaker is wired to the cable quick connector, the knife switch is wired to the intelligent circuit breaker, the four groups of low-voltage line connectors are wired to the knife switch, and the low-voltage line connector extends to the inside of the transformer and is electrically connected to the transformer; The high-voltage side terminal includes three sets of high-voltage line connectors fixedly installed on the rear side of the top of the transformer. The high-voltage line connectors are connected to the high-voltage cables and extend into the interior of the transformer to be electrically connected to the transformer.

2. The self-loading and unloading load transfer equipment according to claim 1 is characterized in that: The trailer is an electric hydraulic lifting trailer.

3. The self-loading and unloading load transfer equipment according to claim 1 is characterized in that: An electric control box is installed at the front radiator of the transformer, and the cable quick connector and the intelligent circuit breaker are installed in the electric control box.

4. The self-loading and unloading load transfer equipment according to claim 3 is characterized in that: The electric control box is provided with a wiring window which can be opened or closed at a corresponding position of the cable quick connector.

5. The self-loading and unloading load transfer equipment according to claim 1, characterized in that: A protective cover is arranged on the front side of the top of the transformer, and the protective cover covers the top of the knife switch.

6. The self-loading and unloading load transfer equipment according to claim 5, characterized in that: The protective cover is made of corrosion-resistant material.

7. The self-loading and unloading load transfer equipment according to claim 1 is characterized in that: The intelligent circuit breaker is equipped with a remote controller, and the intelligent circuit breaker can be remotely controlled to close and open via the remote controller.

8. The self-loading and unloading load transfer equipment according to claim 1, characterized in that: The self-loading and unloading load transfer equipment is used to realize temporary power supply through bypass connection during operation.

9. The self-loading and unloading load transfer equipment according to claim 1, characterized in that: The self-loading and unloading load transfer equipment is used for evacuating and temporarily supplying power to transformers in maintenance work areas.

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