Box-type substation for wind power generation

Abstract

The invention relates to the technical field of power transformation and distribution, and particularly discloses a box-type substation for wind power generation, which comprises a 35kV high-voltage chamber, a transformer chamber, a 10kV medium-voltage chamber and a 1.14 kV low-voltage chamber, a single box-type substation for wind power generation can be applied to a complex wind power plant with 1.14 kV and 10 kV wind power generation output voltages at the same time, and the input economy of the wind power plant is remarkably improved; the transformer chamber is an open chamber, and the two sides of the oil-immersed transformer are provided with cooling fins, so that natural heat dissipation is fully realized, and the long-term operation reliability of the box-type transformer substation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of power transformation and distribution, and in particular to a box-type substation for wind power generation. Background Art

[0002] At present, wind power generation is a renewable and clean energy. The power output of wind turbines is boosted and connected to the grid through a box-type substation for wind power generation. The box-type substation for wind power generation on the market is mainly a three-chamber structure, including a high-voltage chamber, a transformer chamber, and a low-voltage chamber. The transformer chamber is equipped with a double-winding transformer to boost the output of the wind turbine from 1.14kV or 10kV to 35kV, thereby realizing power collection and grid connection.

[0003] In the prior art, complex wind farms have voltage outputs of 1.14kV and 10kV wind turbines at the same time. In this scenario, two wind power box-type substations are currently required to achieve 1.14kV / 35kV and 10kV / 35kV boost outputs respectively.

[0004] However, in the prior art, two wind power box-type substations are required to achieve wind power output voltages of 1.14 kV and 10 kV, which increases the economic cost. Summary of the invention

[0005] The purpose of the present invention is to provide a box-type substation for wind power generation, aiming to solve the technical problem in the prior art that two box-type substations for wind power generation need to be configured to achieve 1.14kV and 10kV wind power generation output voltages, resulting in increased economic costs.

[0006] To achieve the above-mentioned purpose, the present invention adopts a box-type substation for wind power generation, including a 35kV high-voltage room, a transformer room, a 10kV medium-voltage room and a 1.14kV low-voltage room, wherein the 35kV high-voltage room is composed of a 35kV soft-connected copper strip, a 35kV insulator, a 35kV current transformer, a 35kV three-position vacuum circuit breaker, a 35kV lightning arrester, a 35kV sensor, two groups of 35kV live displays, a 35kV electromagnetic lock, a first dehumidifier and a first fan, and the 10kV medium-voltage room is composed of a 10kV soft-connected copper strip, two groups of 10kV insulators, a 10kV current transformer, a 10k The 1.14kV low-voltage room is composed of a 1.14kV soft-connect copper strip, a 1.14kV frame circuit breaker, a 1.14kV current transformer, a 1.14kV surge protector, a 1.14kV voltage transformer, a 1.14kV auxiliary transformer, a temperature and humidity controller, a third fan, a 1.14kV measurement and control device, a UPS uninterruptible power supply, a 1.14kV electromagnetic lock and a third dehumidifier.

[0007] The transformer chamber is an open chamber, which is provided with an oil-immersed transformer. Heat sinks are provided on both sides of the oil-immersed transformer. The oil-immersed transformer is a three-winding structure, and the oil-immersed transformer is provided with 35kV bushing terminals, 10kV bushing terminals and 1.14kV copper busbar terminals matching the 35kV high-voltage chamber, the 10kV medium-voltage chamber and the 1.14kV low-voltage chamber.

[0008] Among them, the first dehumidifier and the first fan are arranged inside the 35kV high-voltage chamber, the second dehumidifier and the second fan are arranged inside the 10kV medium-voltage chamber, and the third fan and the third dehumidifier are arranged inside the 1.14kV low-voltage chamber. When the temperature and humidity controller detects that the humidity exceeds a threshold value, the first dehumidifier, the second dehumidifier and the third dehumidifier are started to dehumidify each chamber. When the temperature and humidity controller detects that the oil temperature of the oil-immersed transformer exceeds a threshold value, the first fan, the second fan and the third fan are started to force air cooling to cool the oil-immersed transformer.

[0009] Among them, the 35kV bushing terminal is electrically connected to the 35kV high-voltage chamber using the 35kV soft connection copper strip, the 10kV bushing terminal is electrically connected to the 10kV medium-voltage chamber using the 10kV soft connection copper strip, and the 1.14kV copper busbar terminal is electrically connected to the 1.14kV low-voltage chamber using the 1.14kV soft connection copper strip.

[0010] The 1.14kV auxiliary transformer and the UPS uninterruptible power supply provide power for the secondary control circuits in the 35kV high-voltage chamber, the 10kV medium-voltage chamber and the 1.14kV low-voltage chamber.

[0011] The beneficial effect of the box-type substation for wind power generation of the present invention is that through the 35kV high-voltage chamber, the transformer chamber, the 10kV medium-voltage chamber and the 1.14kV low-voltage chamber, a single box-type substation for wind power generation can be used in a complex wind farm with both 1.14kV and 10kV wind power generation output voltages, thereby significantly improving the investment economy of the wind farm. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The present invention is a top view of a box-type substation for wind power generation.

[0014] Figure 2 It is a front view of a box-type substation for wind power generation according to the present invention.

[0015] Figure 3 It is a rear view of a box-type substation for wind power generation according to the present invention.

[0016] Figure 4 This is a system diagram of a box-type substation for wind power generation according to the present invention.

[0017] In the figure: 1 is a 35kV high voltage room, 2 is a transformer room, 3 is a 10kV medium voltage room, 4 is a 1.14kV low voltage room, 5 is a 35kV soft connection copper strip, 6 is a 35kV insulator, 7 is a 35kV current transformer, 8 is a 35kV three-position vacuum circuit breaker, 9 is a 35kV lightning arrester, 10 is a 35kV sensor, 11 is a 35kV live display, 12 is a 35kV electromagnetic lock, 13 is the first dehumidifier, 14 is the first fan, 15 is a 10kV soft connection copper strip, 16 is a 10kV insulator, 17 is a 10kV current transformer, 18 is a 10kV voltage transformer, 19 is a 10kV three-position vacuum circuit breaker, 20 is a 10kV lightning arrester, 21 is a 10kV sensor, 22 is 10 kV live display, 23 is 10kV electromagnetic lock, 24 is the second dehumidifier, 25 is the second fan, 26 is 1.14kV soft connection copper strip, 27 is 1.14kV frame circuit breaker, 28 is 1.14kV current transformer, 29 is 1.14kV surge protector, 30 is 1.14kV voltage transformer, 31 is 1.14kV auxiliary transformer, 32 is temperature and humidity controller, 33 is the third fan, 34 is 1.14kV measurement and control device, 35 is UPS uninterruptible power supply, 36 is 1.14kV electromagnetic lock, 37 is the third dehumidifier, 38 is oil-immersed transformer, 39 is heat sink, 40 is 35kV bushing terminal, 41 is 10kV bushing terminal, 42 is 1.14kV copper bus terminal. DETAILED DESCRIPTION

[0018] See also Figures 1 to 4 , Figure 1 It is a top view of a box-type substation for wind power generation according to the present invention;

[0019] Figure 2 It is a front view of a box-type substation for wind power generation according to the present invention; Figure 3 It is a rear view of a box-type substation for wind power generation according to the present invention; Figure 4 This is a system diagram of a box-type substation for wind power generation according to the present invention.

[0020] The present invention provides a box-type substation for wind power generation, comprising a 35kV high-voltage chamber 1, a transformer chamber 2, a 10kV medium-voltage chamber 3 and a 1.14kV low-voltage chamber 4, wherein the 35kV high-voltage chamber 1 is composed of a 35kV soft-connected copper strip 5, a 35kV insulator 6, a 35kV current transformer 7, a 35kV three-position vacuum circuit breaker 8, a 35kV lightning arrester 9, a 35kV sensor 10, two groups of 35kV live displays 11, a 35kV electromagnetic lock 12, a first dehumidifier 13 and a first fan 15, and the 10kV medium-voltage chamber 3 is composed of a 10kV soft-connected copper strip 15, two groups of 10kV insulators 16, a 10kV current transformer 17, a 10kV voltage transformer 18, a 10kV kV three-position vacuum circuit breaker 19, 10kV lightning arrester 20, 10kV sensor 21, two groups of 10kV live display 22, 10kV electromagnetic lock 23, the second dehumidifier 24 and the second fan 25. The 1.14kV low-voltage chamber 4 is composed of a 1.14kV soft-connect copper strip 26, a 1.14kV frame circuit breaker 27, a 1.14kV current transformer 28, a 1.14kV surge protector 29, a 1.14kV voltage transformer 30, a 1.14kV auxiliary transformer 31, a temperature and humidity controller 32, a third fan 33, a 1.14kV measurement and control device 34, a UPS uninterruptible power supply 35, a 1.14kV electromagnetic lock 36 and a third dehumidifier 37.

[0021] Furthermore, the transformer chamber 2 is an open chamber, which is provided with an oil-immersed transformer 38. Heat sinks 39 are provided on both sides of the oil-immersed transformer 38. The oil-immersed transformer 38 is a three-winding structure, and the oil-immersed transformer 38 is provided with 35kV bushing terminals 40, 10kV bushing terminals 41 and 1.14kV copper busbar terminals 42 that match the 35kV high-voltage chamber 1, the 10kV medium-voltage chamber 3 and the 1.14kV low-voltage chamber 4.

[0022] Furthermore, the first dehumidifier 13 and the first fan 14 are arranged inside the 35kV high-voltage chamber 1, the second dehumidifier 24 and the second fan 25 are arranged inside the 10kV medium-voltage chamber 3, and the third fan 33 and the third dehumidifier 37 are arranged inside the 1.14kV low-voltage chamber 4. When the temperature and humidity controller 32 detects that the humidity exceeds a threshold value, the first dehumidifier 13, the second dehumidifier 24 and the third dehumidifier 37 are started to dehumidify each chamber. When the temperature and humidity controller 32 detects that the oil temperature of the oil-immersed transformer 38 exceeds a threshold value, the first fan 14, the second fan 25 and the third fan 33 are started to force air cooling to cool the oil-immersed transformer 38.

[0023] Furthermore, the 35kV bushing terminal 40 is electrically connected to the 35kV high-voltage chamber 1 using the 35kV soft-connection copper strip 5, the 10kV bushing terminal 41 is electrically connected to the 10kV medium-voltage chamber 3 using the 10kV soft-connection copper strip 15, and the 1.14kV copper busbar terminal 42 is electrically connected to the 1.14kV low-voltage chamber 4 using the 1.14kV soft-connection copper strip 26.

[0024] Furthermore, the 1.14kV auxiliary transformer 31 and the UPS uninterruptible power supply 35 provide power for the secondary control circuits in the 35kV high-voltage chamber 1 , the 10kV medium-voltage chamber 3 and the 1.14kV low-voltage chamber 4 .

[0025] Furthermore, two ends of the 35kV soft-connect copper strip 5 are electrically connected to the 35kV bushing terminal 40 and the 35kV insulator 6 respectively, the other end of the 35kV insulator 6 is electrically connected to one end of the 35kV current transformer 7, the other end of the 35kV current transformer 7 is electrically connected to the 35kV three-position vacuum circuit breaker 8, the 35kV lightning arrester 9 and the 35kV sensor 10 are electrically connected to the 35kV three-position vacuum circuit breaker 8 respectively, the two groups of the 35kV live displays 11 are electrically connected to the 35kV sensors 10 respectively, and the 35kV electromagnetic lock 12 is electrically connected to the two groups of the 35kV live displays 11.

[0026] Furthermore, one end of the 10kV soft-connect copper strip 15 is electrically connected to the 10kV bushing terminal 41, the other end of the 10kV soft-connect copper strip 15 is electrically connected to the 10kV current transformer 17 through the 10kV insulator 16, the 10kV voltage transformer 18 and the 10kV three-position vacuum circuit breaker 19 are electrically connected to the other end of the 10kV current transformer 17 respectively, the 10kV insulator 16, the 10kV lightning arrester 20 and the 10kV sensor 21 are electrically connected to the other end of the 10kV three-position vacuum circuit breaker 19, the two groups of the 10kV live displays 22 are electrically connected to the 10kV sensor 21 respectively, and the 10kV electromagnetic lock 23 is electrically connected to the two groups of the 10kV live displays 22.

[0027] Furthermore, one end of the 1.14kV soft-connect copper strip 26 is electrically connected to the 1.14kV copper bus terminal 42, the 1.14kV frame circuit breaker 27, the 1.14kV voltage transformer 30 and the 1.14kV auxiliary transformer 31 are respectively electrically connected to the other end of the 1.14kV soft-connect copper strip 26, the other end of the 1.14kV frame circuit breaker 27 is electrically connected to the 1.14kV current transformer 28, the 1.14kV surge protector 29 is connected in parallel between the 1.14kV frame circuit breaker 27 and the 1.14kV current transformer 28, and the UPS uninterruptible power supply 35 is electrically connected to the other end of the 1.14kV auxiliary transformer 31.

[0028] In this embodiment, through the 35kV high-voltage chamber 1, the transformer chamber 2, the 10kV medium-voltage chamber 3 and the 1.14kV low-voltage chamber 4, wherein the oil-immersed transformer 38 is a three-winding structure corresponding to the three voltages, a single wind power generation box-type substation can be used for a complex wind farm with 1.14kV and 10kV wind power generation output voltages, thereby significantly improving the investment economy of the wind farm;

[0029] The transformer chamber 2 is an open chamber, and the oil-immersed transformer 38 is provided with heat sinks 39 on both sides to fully realize natural heat dissipation and improve the long-term operation reliability of the box transformer;

[0030] The 35kV bushing terminal 40, the 10kV bushing terminal 41 and the 1.14kV copper busbar terminal 42 of the oil-immersed transformer 38 are connected to the corresponding 35kV high-voltage chamber 1, the 10kV medium-voltage chamber 3 and the 1.14kV low-voltage chamber 4 using a soft connection method, which can compensate for the connection stress or vibration stress during assembly, transportation and operation, effectively avoiding the output terminal of the oil-immersed transformer 38 from being damaged by additional stress or oil leakage at its sealing and matching parts, and has the effect of reducing the overall operating noise of the box-type substation;

[0031] The 35kV high voltage chamber 1 is provided with the 35kV electromagnetic lock 12, the 10kV medium voltage chamber 3 is provided with the 10kV electromagnetic lock 23, and the 1.14kV low voltage chamber 4 is provided with a 1.14kV electromagnetic lock 36, which can effectively prevent personnel from mistakenly entering the live compartment and ensure personnel safety;

[0032] The 35kV high-voltage chamber 1 is provided with the first dehumidifier 13, the 10kV medium-voltage chamber 3 is provided with the second dehumidifier 24, and the 1.14kV low-voltage chamber 4 is provided with the third dehumidifier 37. When the temperature and humidity controller 32 detects that the humidity exceeds the threshold, the first dehumidifier 13, the second dehumidifier 24 and the third dehumidifier 37 are started to dehumidify each chamber, which can effectively avoid condensation inside the switchgear and cause insulation failure;

[0033] The 1.14kV auxiliary transformer 31 has an input of 1.14kV and an output of AC220V, which provides working electricity for the equipment in each room. The 35kV high-voltage room 1, the 10kV medium-voltage room 3 and the 1.14kV low-voltage room 4 are all connected to the oil-immersed transformer 38. When the heavy load and the ambient temperature are high, the primary limit threshold of the temperature and humidity controller 32 is triggered to start the first fan 15, the second fan 25 and the third fan 33. Forced ventilation is performed on the corresponding 35kV high-voltage chamber 1, the 10kV medium-voltage chamber 3 and the 1.14kV low-voltage chamber 4 to ensure the reliable operation of the oil-immersed transformer 38. When the secondary limit threshold of the temperature and humidity controller 32 is triggered, a protection action signal is sent to the 35kV three-position vacuum circuit breaker 8, the 10kV three-position vacuum circuit breaker 19 and the 1.14kV frame circuit breaker 27 to prevent the oil-immersed transformer 38 from overheating and being damaged.

[0034] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A box-type substation for wind power generation, characterized in that: It includes a 35kV high-voltage room, a transformer room, a 10kV medium-voltage room and a 1.14kV low-voltage room. The 35kV high-voltage room is composed of a 35kV soft-connected copper strip, a 35kV insulator, a 35kV current transformer, a 35kV three-position vacuum circuit breaker, a 35kV lightning arrester, a 35kV sensor, two groups of 35kV live displays, a 35kV electromagnetic lock, the first dehumidifier and the first fan. The 10kV medium-voltage room is composed of a 10kV soft-connected copper strip, two groups of 10kV insulators, a 10kV current transformer, a 10kV voltage transformer, a 10kV three-position vacuum circuit breaker, a 35kV lightning arrester, a 35kV sensor, two groups of 35kV live displays, a 35kV electromagnetic lock, a first dehumidifier and a first fan. The 1.14kV low-voltage room is composed of a 1.14kV vacuum circuit breaker, a 10kV lightning arrester, a 10kV sensor, two sets of 10kV live displays, a 10kV electromagnetic lock, a second dehumidifier and a second fan. The 1.14kV low-voltage room is composed of a 1.14kV soft-connect copper strip, a 1.14kV frame circuit breaker, a 1.14kV current transformer, a 1.14kV surge protector, a 1.14kV voltage transformer, a 1.14kV auxiliary transformer, a temperature and humidity controller, a third fan, a 1.14kV measurement and control device, a UPS uninterruptible power supply, a 1.14kV electromagnetic lock and a third dehumidifier.

2. A box-type substation for wind power generation as claimed in claim 1, characterized in that: The transformer chamber is an open chamber, which is equipped with an oil-immersed transformer. Heat sinks are provided on both sides of the oil-immersed transformer. The oil-immersed transformer has a three-winding structure and is provided with 35kV bushing terminals, 10kV bushing terminals and 1.14kV copper busbar terminals that match the 35kV high-voltage chamber, the 10kV medium-voltage chamber and the 1.14kV low-voltage chamber.

3. A box-type substation for wind power generation as claimed in claim 1, characterized in that: The first dehumidifier and the first fan are arranged inside the 35kV high-voltage chamber, the second dehumidifier and the second fan are arranged inside the 10kV medium-voltage chamber, and the third fan and the third dehumidifier are arranged inside the 1.14kV low-voltage chamber. When the temperature and humidity controller detects that the humidity exceeds a threshold value, the first dehumidifier, the second dehumidifier and the third dehumidifier are started to dehumidify each chamber. When the temperature and humidity controller detects that the oil temperature of the oil-immersed transformer exceeds a threshold value, the first fan, the second fan and the third fan are started to force air cooling to cool the oil-immersed transformer.

4. A box-type substation for wind power generation as claimed in claim 1, characterized in that: The 35kV bushing terminal is electrically connected to the 35kV high-voltage chamber using the 35kV soft-connection copper strip, the 10kV bushing terminal is electrically connected to the 10kV medium-voltage chamber using the 10kV soft-connection copper strip, and the 1.14kV copper busbar terminal is electrically connected to the 1.14kV low-voltage chamber using the 1.14kV soft-connection copper strip.

5. A box-type substation for wind power generation as claimed in claim 1, characterized in that: The 1.14kV auxiliary transformer and the UPS uninterruptible power supply provide power for the secondary control circuits in the 35kV high-voltage chamber, the 10kV medium-voltage chamber and the 1.14kV low-voltage chamber.

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