A large-capacity wind power-specific new energy box-type substation

Abstract

A large-capacity wind power-dedicated new energy prefabricated substation, belonging to the field of substation technology, includes a prefabricated substation enclosure. Inside the enclosure are a high-voltage compartment, a transformer compartment, and a low-voltage compartment. The transformer compartment houses an oil tank with radiators extending to the outside of the enclosure on both sides. An oil conservator is located above the oil tank, connected to it via pipelines. The oil tank contains the transformer core and coils. The high-voltage compartment houses a high-voltage circuit breaker, with one side connected to a high-voltage insulator and the other side connected to the oil tank. The low-voltage compartment houses a low-voltage circuit breaker, with one side connected to the oil tank and the other side connected to the low-voltage incoming cable. The radiators extending to the outside of the tank, combined with the top oil conservator, form a natural oil circulation cooling channel, increasing the heat dissipation contact area and significantly improving the heat dissipation efficiency of the large-capacity transformer under high load, thus solving the problem of high-temperature operation of the unit.

Description

Technical Field

[0001] This utility model belongs to the field of substation technology, specifically a large-capacity wind power-specific new energy box-type substation. Background Technology

[0002] Wind power prefabricated substations (hereinafter referred to as wind power box substations) are an indispensable and important component of wind power generation systems. They integrate transformers, high-voltage switchgear, low-voltage switchgear, control and protection equipment, etc., forming a compact, modular, prefabricated substation. The main function of wind power box substations is to transform and distribute the electrical energy generated by wind turbines to meet the needs of grid connection or subsequent electrical equipment.

[0003] Wind turbine box-type substations are widely used in onshore and offshore wind farms. In onshore wind farms, these substations are typically installed at or near the base of the wind turbine tower, responsible for converting the voltage of the electricity generated by the wind turbine before connecting it to the power grid. In offshore wind farms, due to harsher environmental conditions, the protection performance and reliability requirements for wind turbine box-type substations are higher, therefore, more robust and durable designs and materials are usually adopted.

[0004] Wind power generation refers to the process of generating electricity by utilizing wind resources on land or at sea, converting wind energy into mechanical energy, and then converting mechanical energy into electrical energy. Throughout this process, it reduces dependence on traditional fossil fuels, produces no greenhouse gases, and achieves sustainable development and environmental protection. To match the ever-increasing single-unit generating capacity of wind turbines and overcome the environmental challenges faced by wind power generation, such as areas with large diurnal temperature variations, the corrosive effects of wind and sand on the turbine housing and components, complex terrain, high altitudes, and fragile ecosystems, coupled with the fact that most wind power projects are built in sparsely populated areas with limited local power absorption capacity, and the intermittent and unstable nature of wind power further complicates grid dispatch and absorption, large-capacity dedicated step-up transformers for wind power are needed to meet the demands of wind power systems. However, after meeting the increasing generating capacity, issues arise such as high operating temperatures and low heat dissipation efficiency of the turbine units. Utility Model Content

[0005] To address the problem of high operating temperatures caused by low heat dissipation efficiency after increasing the power generation capacity of generator sets, this utility model provides a large-capacity wind power-specific new energy box-type substation.

[0006] This utility model is achieved through the following technical solution:

[0007] A large-capacity wind power-dedicated new energy prefabricated substation includes a prefabricated substation enclosure. Inside the enclosure, a high-voltage chamber, a transformer chamber, and a low-voltage chamber are arranged sequentially. The transformer chamber contains an oil tank with radiators extending to the outside of the enclosure on both sides. An oil conservator is mounted on the top surface of the enclosure above the oil tank, connected to the tank via pipelines. The oil tank contains a transformer core and coils wound around it. The high-voltage chamber contains a high-voltage circuit breaker, with one side connected to a high-voltage insulator and the other side connected to the oil tank. The low-voltage chamber contains a low-voltage circuit breaker, with one side connected to the oil tank and the other side connected to a low-voltage incoming cable.

[0008] The high-voltage compartment, transformer compartment, and low-voltage compartment are arranged in sequence to achieve clear functional zoning, high space utilization, and facilitate rapid installation and maintenance, adapting to the complex deployment environment of onshore and offshore wind farms. The radiators extending from both sides of the oil tank to the outside of the tank, combined with the top oil conservator, form a natural oil circulation heat dissipation channel, increasing the heat dissipation contact area and significantly improving the heat dissipation efficiency of large-capacity transformers under high load, thus solving the problem of high-temperature operation of the unit.

[0009] A further improvement of this invention is that the oil storage tank and the oil container are connected by a metal corrugated pipe, which is connected to the bottom of the oil storage tank via a connecting flange steel pipe. This flexible metal corrugated pipe connection can compensate for the expansion and contraction of oil volume caused by temperature changes, preventing seal failure, and is particularly suitable for environments with large day-night temperature differences or marine salt spray corrosion.

[0010] A further improvement of this invention is that a gas relay is installed on the aforementioned metal bellows. The gas relay monitors the gas content in the oil circuit in real time, quickly identifying internal short circuits or insulation faults in the transformer, thus improving equipment operational safety.

[0011] A further improvement of this utility model is that the aforementioned transformer substation housing includes a channel steel base, a steel structural frame, an outer door panel, and a detachable top cover. The steel structural frame is mounted on the channel steel base, and the outer door panel is mounted on the side of the steel structural frame. The detachable top cover is mounted on the top of the steel structural frame and corresponds to the high-voltage compartment and the low-voltage compartment, respectively. The combined design of the channel steel base and the steel structural frame enhances the overall resistance to wind and sand, impact, and seismic activity, making it suitable for harsh working conditions such as high altitude and strong winds and sandstorms. The detachable top cover and outer door panel facilitate the maintenance of internal equipment, reducing downtime and maintenance costs.

[0012] A further improvement of this utility model is that the aforementioned transformer substation casing also includes two partitions, which are respectively disposed between the high-voltage compartment and the transformer compartment, and between the low-voltage compartment and the transformer compartment, and both partitions are mounted on the steel structure frame. The partitions effectively isolate electromagnetic interference between the high-voltage compartment, the low-voltage compartment, and the transformer compartment, improving the operational stability of the equipment; the physical isolation can delay the spread of fire, meeting the safety specifications for high-risk scenarios such as offshore wind power.

[0013] A further improvement of this utility model is that a high-voltage bushing and a low-voltage bushing are provided on the side of the aforementioned oil tank; the high-voltage bushing extends into the high-voltage chamber and is connected to the high-voltage circuit breaker via a copper busbar; the low-voltage bushing extends into the low-voltage chamber and is connected to the low-voltage circuit breaker via a copper busbar. The copper busbar reduces contact resistance and energy loss, improving substation efficiency; the bushing sealing design can resist the corrosion of conductive components by wind, sand, humidity, and other environmental factors, extending equipment life.

[0014] A further improvement of this utility model is that a high-voltage current transformer is connected in series on the aforementioned copper busbar.

[0015] A further improvement of this utility model is that a high-voltage voltage transformer is connected in parallel to the output terminal of the above-mentioned high-voltage circuit breaker.

[0016] A further improvement of this utility model is that a low-voltage current transformer is connected in series with the aforementioned low-voltage incoming cable.

[0017] A further improvement of this utility model is that a low-voltage voltage transformer is connected in parallel on the aforementioned low-voltage incoming cable.

[0018] Current and voltage transformers collect electrical parameters in real time, supporting precise grid dispatch and mitigating the impact of intermittent wind power on the grid. Circuit breakers and transformers work together to provide overcurrent and overvoltage protection, ensuring that the system can quickly disconnect faulty lines under abnormal conditions and guarantee grid stability.

[0019] As can be seen from the above technical solutions, the beneficial effects of this utility model are: the high-voltage chamber, transformer chamber and low-voltage chamber are arranged in sequence, which realizes clear functional zoning, high space utilization, facilitates rapid installation and maintenance, and adapts to the complex deployment environment of onshore and offshore wind farms; the radiators extending to the outside of the tank on both sides of the tank, combined with the top oil tank, form a natural oil circulation heat dissipation channel, increase the heat dissipation contact area, significantly improve the heat dissipation efficiency of large-capacity transformers under high load, and solve the problem of high-temperature operation of the unit. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an internal top view of a specific embodiment of the present invention.

[0022] Figure 2 This is an internal side view schematic diagram of a specific embodiment of the present utility model.

[0023] Figure 3 This is a schematic diagram of the low-pressure chamber structure according to a specific embodiment of the present invention.

[0024] Figure 4 This is a partial structural diagram of the transformer substation housing according to a specific embodiment of the present invention.

[0025] In the attached diagram: 10. Transformer enclosure; 11. Channel steel base; 12. Steel structure frame; 13. Outer door panel; 14. Detachable top cover; 15. Partition; 20. High-voltage compartment; 21. High-voltage cabinet; 22. High-voltage circuit breaker; 23. High-voltage insulator; 24. High-voltage connecting copper busbar; 25. High-voltage surge arrester; 26. Copper busbar 1; 27. High-voltage current transformer; 28. High-voltage voltage transformer; 30. Low-voltage compartment; 31. Low-voltage cabinet; 32. Low-voltage circuit breaker; 33. Low-voltage connecting copper busbar; 34. Low-voltage incoming cable; 35. Low-voltage voltage transformer; 36. Low-voltage current transformer; 37. Surge protector; 38. Knife fuse switch; 39. Copper busbar II; 40. Transformer compartment; 41. High-voltage bushing; 42. Low-voltage bushing; 43. Oil tank; 44. Transformer core; 45. Coil; 46. Radiator; 47. Oil conservator; 48. Corrugated metal pipe; 481. Gas relay; 49. Connecting flange steel pipe. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0027] like Figures 1-4As shown, this utility model discloses a large-capacity wind power-dedicated new energy box-type substation, including a box-type substation shell 10. A high-voltage chamber 20, a transformer chamber 40, and a low-voltage chamber 30 are arranged sequentially inside the box-type substation shell 10. An oil tank 43 is provided inside the transformer chamber 40. Radiators 46 extending to the outside of the box-type substation shell 10 are provided on both sides of the oil tank 43. An oil storage tank 47 is installed on the top surface of the box-type substation shell 10 above the oil tank 43. The oil storage tank 47 is connected to the oil tank 43 through a pipeline. The oil tank 43 contains insulating oil, a transformer core 44, and coils 45 wound around the transformer core 44. Multiple coils 45 wound around the transformer core 44 are arranged sequentially between the high-voltage chamber 20 and the low-voltage chamber 30, and the axis of the coils 45 is vertically aligned. The high-voltage compartment 20, transformer compartment 40, and low-voltage compartment 30 are arranged in sequence to achieve clear functional zoning, high space utilization, and facilitate rapid installation and maintenance, adapting to the complex deployment environment of onshore and offshore wind farms. The radiators 46 extending from both sides of the oil tank 43 to the outside of the tank, combined with the top oil conservator 47, form a natural oil circulation heat dissipation channel, increasing the heat dissipation contact area and significantly improving the heat dissipation efficiency of large-capacity transformers under high load, thus solving the problem of high-temperature operation of the unit.

[0028] The number of radiators 46 on either side of the oil tank 43 is equal, and the number of coils 45 inside the oil tank 43 is correspondingly arranged. This helps to improve heat dissipation efficiency.

[0029] The oil tank 47 and the oil reservoir 43 are connected by a metal bellows 48, which is connected to the bottom of the oil tank 47 via a connecting flange steel pipe 49. The flexible connection of the metal bellows 48 can compensate for the expansion and contraction of oil volume caused by temperature changes, avoid sealing failure, and is especially suitable for environments with large day-night temperature differences or marine salt spray corrosion.

[0030] A gas relay 481 is installed on the metal bellows 48. The gas relay 481 monitors the gas content in the oil circuit in real time, quickly identifies internal short circuits or insulation faults in the transformer, and improves the safety of equipment operation.

[0031] The transformer substation housing 10 includes a channel steel base 11, a steel structural frame 12, an outer door panel 13, and a detachable top cover 14. The steel structural frame 12 is mounted on the channel steel base 11, and the outer door panel 13 is mounted on the side of the steel structural frame 12. The detachable top cover 14 is mounted on top of the steel structural frame 12 and corresponds to the high-voltage chamber 20 and the low-voltage chamber 30, respectively. The combined design of the channel steel base 11 and the steel structural frame 12 enhances the overall resistance to wind and sand, impact, and seismic activity, making it suitable for harsh working conditions such as high altitude and strong winds and sandstorms. The detachable top cover 14 and the outer door panel 13 facilitate the maintenance of internal equipment, reducing downtime and maintenance costs.

[0032] The transformer substation enclosure 10 also includes two partitions 15, which are respectively located between the high-voltage chamber 20 and the transformer chamber 40, and between the low-voltage chamber 30 and the transformer chamber 40, and both partitions 15 are mounted on the steel structure frame 12. The partitions 15 effectively isolate electromagnetic interference between the high-voltage chamber 20, the low-voltage chamber 30, and the transformer chamber 40, improving the operational stability of the equipment; the physical isolation can delay the spread of fire, meeting the safety specifications for high-risk scenarios such as offshore wind power.

[0033] The steel structure frame 12 is mainly made of cold-rolled steel plates bent and welded and then connected to the channel steel base 11; the outer door panel 13 is installed on the steel structure frame 12 by welding or hinge. The detachable top cover 14 is bolted to the top of the steel structure frame 12.

[0034] The steel frame 12 also houses a high-voltage cabinet 21 and a low-voltage cabinet 31. The high-voltage cabinet 21 is located in the high-voltage chamber 20, and the low-voltage cabinet 31 is located in the low-voltage chamber 30. All components in the high-voltage chamber 20 are mounted on the high-voltage cabinet 21; all components in the low-voltage chamber 30 are mounted on the low-voltage cabinet 31.

[0035] A high-voltage circuit breaker 22 is installed in the high-voltage compartment 20, and a low-voltage circuit breaker 32 is installed in the low-voltage compartment 30. A high-voltage bushing 41 and a low-voltage bushing 42 are installed on the side of the oil tank 43. The high-voltage bushing 41 extends into the high-voltage compartment 20 and is connected to the high-voltage circuit breaker 22 via a copper busbar 26. The low-voltage bushing 42 extends into the low-voltage compartment 30 and is connected to the low-voltage circuit breaker 32 via a copper busbar 39. The copper busbars reduce contact resistance and energy loss, improving substation efficiency. The sealed bushing design resists corrosion of conductive components by wind, sand, and humidity, extending equipment life.

[0036] A high-voltage current transformer 27 is connected in series on the copper busbar 26. A high-voltage voltage transformer 28 is connected in parallel at the output terminal of the high-voltage circuit breaker 22.

[0037] The high-pressure bushing 41 penetrates the partition 15 and extends into the high-pressure chamber 20, while the low-pressure bushing 42 penetrates the partition 15 and extends into the low-pressure chamber 30.

[0038] One side of the high-voltage circuit breaker 22 is connected to the high-voltage insulator 23, and the other side is connected to the oil tank 43. The high-voltage insulator 23 is connected to the high-voltage circuit breaker 22 via a high-voltage connecting copper busbar 24. The high-voltage circuit breaker 22 is installed on the upper part of the high-voltage cabinet 21, and the high-voltage circuit breaker 22 is a high-voltage vacuum circuit breaker, with a vacuum bulb installed on the side of the high-voltage vacuum circuit breaker near the transformer compartment 40.

[0039] Below the high-voltage circuit breaker 22, there is a high-voltage surge arrester 25 installed at the bottom of the high-voltage cabinet 21. The high-voltage surge arrester 25 is connected to the high-voltage circuit breaker 22 via a cable.

[0040] One side of the low-voltage circuit breaker 32 is connected to the oil tank 43, and the other side of the low-voltage circuit breaker 32 is connected to the low-voltage incoming cable 34. The low-voltage circuit breaker 32 is installed on the upper part of the low-voltage cabinet 31, and the low-voltage circuit breaker 32 is connected to the low-voltage incoming cable 34 through the low-voltage connecting copper busbar 33.

[0041] A low-voltage current transformer 36 is connected in series with the low-voltage incoming cable 34 or the low-voltage connecting copper busbar 33.

[0042] A low-voltage voltage transformer 35 is connected in parallel to the low-voltage incoming cable 34 or the low-voltage connecting copper busbar 33.

[0043] Current and voltage transformers collect electrical parameters in real time, supporting precise grid dispatch and mitigating the impact of intermittent wind power on the grid. Circuit breakers and transformers work together to provide overcurrent and overvoltage protection, ensuring that the system can quickly disconnect faulty lines under abnormal conditions and guarantee grid stability.

[0044] The low-voltage compartment 30 is also equipped with a knife-blade fuse 38, a UPS, and a surge protector 37. The knife-blade fuse 38 is installed on the low-voltage incoming cable 34 and can control the circuit's on / off state. The UPS (Uninterruptible Power Supply) connects a backup battery pack in parallel to the low-voltage connecting copper busbar 33 to provide power backup after a power outage. The surge protector 37 is connected to the low-voltage circuit breaker 32 via a cable, forming a lightning protection system.

[0045] This utility model describes a large-capacity wind power-specific new energy box-type substation. The high-voltage room, transformer room, and low-voltage room are arranged sequentially, achieving clear functional zoning, high space utilization, and facilitating rapid installation and maintenance. It is adaptable to the complex deployment environment of onshore and offshore wind farms. The radiators extending from both sides of the oil tank to the outside of the box, combined with the top oil conservator, form a natural oil circulation heat dissipation channel, increasing the heat dissipation contact area and significantly improving the heat dissipation efficiency of the large-capacity transformer under high load, thus solving the problem of high-temperature operation of the unit.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large-capacity wind power dedicated new energy box-type substation, comprising a box-type transformer shell (10), a high-voltage chamber (20), a transformer chamber (40) and a low-voltage chamber (30) are arranged in the box-type transformer shell (10) in sequence; characterized in that, The transformer compartment (40) is equipped with an oil tank (43). On both sides of the oil tank (43) are radiators (46) extending to the outside of the transformer housing (10). Above the oil tank (43) is an oil storage tank (47) installed on the top surface of the transformer housing (10). The oil storage tank (47) is connected to the oil tank (43) through a pipeline. The oil tank (43) is equipped with a transformer core (44) and a coil (45) wound on the transformer core (44). The high-voltage compartment (20) is equipped with a high-voltage circuit breaker (22). One side of the high-voltage circuit breaker (22) is connected to a high-voltage insulator (23), and the other side of the high-voltage circuit breaker (22) is connected to the oil tank (43). The low-voltage compartment (30) is equipped with a low-voltage circuit breaker (32). One side of the low-voltage circuit breaker (32) is connected to the oil tank (43), and the other side of the low-voltage circuit breaker (32) is connected to a low-voltage incoming cable (34).

2. The large-capacity wind power dedicated new energy box-type substation according to claim 1, characterized in that, The oil storage tank (47) and the oil tank (43) are connected by a metal corrugated pipe (48), and the metal corrugated pipe (48) is connected to the bottom of the oil storage tank (47) through a connecting flange steel pipe (49).

3. The large-capacity wind power dedicated new energy box-type substation according to claim 2, characterized in that, A gas relay (481) is provided on the metal bellows (48).

4. The large-capacity wind power dedicated new energy box-type substation according to any one of claims 1 to 3, characterized in that, The transformer substation housing (10) includes a channel steel base (11), a steel structure frame (12), an outer door panel (13), and a detachable top cover (14). The steel structure frame (12) is installed on the channel steel base (11), and the outer door panel (13) is installed on the side of the steel structure frame (12). The detachable top cover (14) is installed on the top of the steel structure frame (12) and corresponds to the high-voltage chamber (20) and the low-voltage chamber (30) respectively.

5. A large-capacity wind power-dedicated new energy box-type substation according to claim 4, characterized in that, The transformer housing (10) also includes two partitions (15), which are respectively located between the high-voltage chamber (20) and the transformer chamber (40) and between the low-voltage chamber (30) and the transformer chamber (40), and both partitions (15) are installed on the steel structure frame (12).

6. The large-capacity wind power dedicated new energy box-type substation according to claim 5, characterized in that, The oil tank (43) is provided with a high-voltage bushing (41) and a low-voltage bushing (42) on its side; the high-voltage bushing (41) extends into the high-voltage chamber (20) and is connected to the high-voltage circuit breaker (22) via a copper busbar (26); the low-voltage bushing (42) extends into the low-voltage chamber (30) and is connected to the low-voltage circuit breaker (32) via a copper busbar (39).

7. The large-capacity wind power dedicated new energy box-type substation according to claim 6, characterized in that, A high-voltage current transformer (27) is connected in series on the copper busbar (26).

8. The large-capacity wind power dedicated new energy box-type substation according to claim 5, characterized in that, A high-voltage voltage transformer (28) is connected in parallel to the output terminal of the high-voltage circuit breaker (22).

9. The large-capacity wind power dedicated new energy box-type substation according to claim 5, characterized in that, The low-voltage incoming cable (34) is connected in series with a low-voltage current transformer (36).

10. The large-capacity wind power dedicated new energy box-type substation according to claim 5, characterized in that, A low-voltage voltage transformer (35) is connected in parallel on the low-voltage incoming cable (34).

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