Frequency converter cooling system for wind turbine generator

Abstract

The utility model discloses a frequency converter cooling system for a wind turbine generator, and belongs to the technical field of wind turbine generator cooling. Comprising a frequency conversion cabinet, a mounting plate is fixedly arranged in the frequency conversion cabinet, and cooling fins are fixedly arranged at the top of the mounting plate; the cabinet door is arranged on one side of the frequency conversion cabinet, and a flow guide assembly is arranged on the inner side of the cabinet door and used for guiding gas at the top of the mounting plate to the bottom of the frequency conversion cabinet; according to the application, the frequency conversion cabinet and the cabinet door are adopted to place the radiating fins in the sealed space, and cooling gas is input into the frequency conversion cabinet through the external cooler on the outer side of the frequency conversion cabinet and is pumped out for recycling after heat exchange; the problems that the service life of a cooling part is shortened, the reliability of the cooling part is reduced and the failure rate of a wind turbine generator is high due to erosion of sand, dust, particles, catkins and salt mist in the field environment are solved, and impurities in air can be prevented from entering the frequency conversion cabinet in the air cooling heat dissipation process; and the influence on the service life and the reliability of the radiating fins is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbine cooling, and more specifically, to a frequency converter cooling system for a wind turbine. Background Art

[0002] Faced with the escalating pressure of the energy crisis, countries around the world have made the development of wind energy a research focus of new energy technology, promoting the continuous development of wind power generation technology; in recent years, with the strong support of various policies, the application design and research and development level of wind turbines has been further improved; however, as wind turbine technology develops, the heat dissipation of wind turbines has also increased. Among them, the wind turbine tower base inverter is connected between the generator rotor and the power grid, installed at the tower base, and its main components include the frequency conversion cabinet and the control cabinet; it controls the power devices of the control device to achieve wind turbine output power control and adjust the operating status of the wind turbine, and is the core component of the wind turbine connected to the power grid.

[0003] At present, air cooling technology is the most commonly used cooling method for wind turbines. However, with the continuous increase in single-unit power and total installed capacity, conventional air cooling technology has reached the limit of its cooling capacity. In addition, due to the erosion of sand, dust, particles, catkins and salt spray in the on-site environment, the service life and reliability of cooling components have decreased, resulting in frequent failures of wind turbines. Therefore, it is urgent to develop new and efficient cooling technologies to ensure the long-term, reliable and safe operation of future wind turbines.

[0004] In view of this, we propose a frequency converter cooling system for wind turbines. Utility Model Content

[0005] The purpose of the present application is to provide a frequency converter cooling system for a wind turbine, which can effectively solve the problem in the prior art that the service life and reliability of cooling components are reduced due to erosion by dust, particles, catkins and salt spray in the field environment, resulting in frequent failure rates of wind turbines.

[0006] The present application provides a frequency converter cooling system for a wind turbine, comprising a frequency converter cabinet, wherein heat dissipation fins are installed in the frequency converter cabinet through a mounting plate, and the heat dissipation fins are arranged in an array; a cabinet door is arranged on one side of the frequency converter cabinet, and further comprising:

[0007] An external cooler, arranged outside the frequency conversion cabinet, for inputting circulating cooling gas into the frequency conversion cabinet;

[0008] An air duct is arranged on a side of the frequency converter cabinet away from the cabinet door, the air duct is connected to one end of an external cooler, and is used to blow cooling and heat dissipation gas to the heat dissipation fins;

[0009] A flow guide component, arranged on a side of the cabinet door facing the frequency conversion cabinet, and used for guiding the gas entering the frequency conversion cabinet through the air duct to the lower part of the mounting plate;

[0010] Wherein, the external cooler comprises:

[0011] A first tube body connected to the air duct;

[0012] The second pipe body is connected to one side of the frequency conversion cabinet, and the second pipe body is connected to the portion of the frequency conversion cabinet located below the mounting plate.

[0013] In some embodiments, a partition is further provided in the inverter, and the partition is provided above the heat dissipation fins;

[0014] Electrical components are installed above the partition and below the mounting plate.

[0015] In some embodiments, an air inlet is provided on one side of the air duct facing the first tube body;

[0016] A jet port is arranged on one side of the air duct close to the heat dissipation fins, and a plurality of the jet ports are arranged, each of the jet ports being arranged corresponding to a group of heat dissipation fins.

[0017] In some embodiments, the jet port includes a first air port, and the first air port is arranged toward the top of the frequency conversion cabinet.

[0018] In some of the embodiments, a first guide plate is provided in the frequency conversion cabinet;

[0019] The first guide plate is arranged at the top of the frequency conversion cabinet corresponding to the first gas port, and is used to guide the gas passing through the first gas port.

[0020] In some embodiments, the jet port includes a second air port, and the second air port is arranged toward the corresponding heat dissipation fin.

[0021] In some embodiments, a cavity is opened inside the cabinet door, and the flow guide component is located inside the cavity;

[0022] The flow guide assembly comprises:

[0023] A baffle, which is fixedly arranged on one side of the cabinet door close to the mounting plate. In a working state, the baffle is located outside the mounting plate;

[0024] The second guide plate is fixedly arranged in the cavity with a downward tilt, and is used for guiding the gas flowing through the top of the mounting plate and the inside of the cavity to the bottom of the frequency conversion cabinet.

[0025] In some embodiments, a side sealing plate is slidably provided on a side of the jet port close to the heat dissipation fins, a top sealing plate is slidably provided on the top of the jet port, and the side sealing plate and the top sealing plate are fixedly provided;

[0026] An electric push rod is arranged on the top of the top sealing plate, and the electric push rod is fixedly arranged inside the frequency conversion cabinet to drive the top sealing plate to slide;

[0027] Among them, a second through hole is opened on the inner side of the side sealing plate corresponding to the second air port, and a first through hole is opened on the inner side of the top sealing plate corresponding to the first air port. The first through hole and the second through hole are staggered in the vertical direction and are used to separately close the first air port and the second air port respectively.

[0028] In some of the embodiments, a grid plate is fixedly disposed inside the cavity on the inner side of the cabinet door, and the grid plate is tilted upward to prevent the gas flowing through the heat dissipation fins from flowing upward.

[0029] In some embodiments, a guide member is fixedly provided on the outer side of the frequency conversion cabinet, a sliding member is fixedly provided on the outer side of the cabinet door, and the sliding member is slidably provided on the inner side of the guide member.

[0030] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0031] The present application adopts a frequency converter cabinet and a cabinet door to place the heat dissipation fins in a sealed space, inputs cooling gas into the frequency converter cabinet through an external cooler on the outside of the frequency converter cabinet, and extracts it for recycling after heat exchange, thereby solving the problem of frequent failure rates of wind turbines caused by reduced service life and reliability of cooling components due to erosion by dust, particles, catkins and salt spray in the on-site environment, and thereby preventing impurities in the air from entering the interior of the frequency converter cabinet during the air-cooling heat dissipation process, thereby preventing the service life and reliability of the heat dissipation fins from being affected.

[0032] The present application arranges a guide component on the inner side of the cabinet door so that after the gas passes through the heat dissipation fins for heat exchange, the gas is guided to the bottom of the frequency converter cabinet for recovery under the action of the guide component, and at the same time, the electrical components at the bottom of the frequency converter cabinet are cooled, so that the heat dissipation gas is fully utilized.

[0033] The present application slides side sealing plates and top sealing plates on the outside of the jet port so that the side sealing plates and top sealing plates can be slidably adjusted according to the working conditions of the heat dissipation fins and electrical components inside the frequency converter cabinet, thereby adjusting the air outlet direction of the jet port so that the jet port can perform fixed-point jet heat dissipation to the heat dissipation fins and electrical components respectively, thereby ensuring the heat dissipation efficiency of the electrical components and the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of a frequency converter cooling system for a wind turbine generator system disclosed in a preferred embodiment of the present application;

[0035] Figure 2 A schematic side view of the structure of a frequency converter cooling system for a wind turbine generator system disclosed in a preferred embodiment of the present application;

[0036] Figure 3 A schematic cross-sectional view of a frequency converter cabinet in a frequency converter cooling system for a wind turbine generator system disclosed in a preferred embodiment of the present application;

[0037] Figure 4 This is a schematic diagram of the exploded structure of the air duct in the inverter cooling system for a wind turbine generator set disclosed in a preferred embodiment of the present application;

[0038] Figure 5 This is a schematic diagram of the structure of a cabinet door in a frequency converter cooling system for a wind turbine generator system disclosed in a preferred embodiment of the present application;

[0039] Description of the numbers in the figure:

[0040] 1. Frequency conversion cabinet; 11. Mounting plate; 12. Heat dissipation fins; 13. Partition plate; 14. Electrical components; 15. Guide member; 16. Air outlet; 17. First guide plate;

[0041] 2. Cabinet door; 21. Sliding member; 22. Door lock; 23. Handle; 24. Baffle; 25. Second guide plate; 26. Grid plate;

[0042] 3. External cooler; 31. First tube body; 32. Second tube body;

[0043] 4. Air duct; 41. Air inlet; 42. Jet port; 421. Second air port; 422. First air port; 43. Side sealing plate; 431. Second through hole; 44. Top sealing plate; 441. First through hole; 45. Electric push rod. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with the accompanying drawings.

[0045] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5The embodiment of the present application discloses a frequency converter cooling system for a wind turbine, including a frequency converter cabinet 1, a mounting plate 11 is fixedly arranged inside the frequency converter cabinet 1, and a heat dissipation fin 12 for heat dissipation of the frequency converter is fixedly arranged on the top of the mounting plate 11, which serves as the main heat dissipation structure inside the frequency converter cabinet 1; an air outlet 16 is opened on one side of the frequency converter cabinet 1 below the mounting plate 11, and an air duct 4 is fixedly arranged on one side of the frequency converter cabinet 1 for blowing air to the heat dissipation fin 12; an external cooler 3 is arranged on the outside of the frequency converter cabinet 1, and a first tube body 31 and a second tube body 32 are fixedly arranged on the outside of the external cooler 3, the other end of the first tube body 31 is fixedly connected to the air inlet end of the air duct 4, and the other end of the second tube body 32 is fixedly connected to the frequency converter cabinet 1 corresponding to the air outlet 16; a cabinet door 2 is arranged on the side of the frequency converter cabinet 1 away from the air duct 4, and a guide component is arranged on the inner side of the cabinet door 2, which is used to guide the gas input from the air duct 4 to the bottom of the mounting plate 11 to form a circulating cooling system.

[0046] In the above technical scheme, the cabinet door 2 is sealed with the frequency conversion cabinet 1, and the frequency converter is installed inside the frequency conversion cabinet 1 for sealed protection. After starting the external cooler 3 outside the frequency conversion cabinet 1, the external cooler 3 is used to cool the external air and then input it into the first tube body 31. The first tube body 31 then inputs the cooling gas into the interior of the frequency conversion cabinet 1 through the air duct 4, and blows it to the heat dissipation fins 12 to dissipate heat in a jet manner. When the gas passes through the heat dissipation fins 12, it absorbs heat. When the gas reaches the inside of the cabinet door 2, the gas is guided to the bottom of the mounting plate 11 through the guide component inside the cabinet door 2, so that the gas after heat exchange is sucked out again by the external cooler 3 through the second tube body 32, and is reused after being cooled again by the external cooler 3, so as to realize the circulating cooling of the frequency converter, and the internal air is recycled, so as to prevent external impurities from entering the interior of the frequency conversion cabinet 1 to pollute the frequency converter and components such as the heat dissipation fins 12, and ensure the normal heat dissipation inside the frequency conversion cabinet 1. The cooling principle of the external cooler 3 is the existing technology and will not be repeated here.

[0047] Reference Figure 3 and Figure 4 , heat dissipation fins 12 are evenly distributed on the top of the mounting plate 11 along the horizontal direction, and jet ports 42 are evenly distributed on the side of the air duct 4 close to the heat dissipation fins 12. The jet ports 42 are arranged one by one corresponding to the heat dissipation fins 12, and are used to blow the gas inside the air duct 4 to each heat dissipation fin 12 for heat dissipation. A second air port 421 is opened on the side of the heat dissipation fin 12 close to the jet port 42, and an air inlet 41 is opened on one side of the air duct 4 corresponding to the first tube body 31.

[0048] In the above technical solution, the cooled gas is input into the interior of the air duct 4 through the first tube body 31, and then the gas is diverted and blown to each cooling fin 12 through the jet port 42 on one side of the air duct 4, thereby achieving the effect of fixed-point jet cooling to ensure that each cooling fin 12 inside the frequency converter cabinet 1 dissipates heat evenly.

[0049] Reference Figure 1 and Figure 3 In order to ensure the integrity of the generator set function, a partition 13 is fixedly installed inside the frequency converter cabinet 1. The partition 13 is located above the heat dissipation fins 12. Electrical components 14 are fixedly installed at the bottom of the frequency converter cabinet 1 and the top of the partition 13.

[0050] In order to achieve heat dissipation for the electrical components 14, a cavity is opened on the inner side of the cabinet door 2, and the guide assembly is located inside the cavity. The guide assembly includes a baffle 24 and a second guide plate 25. The baffle 24 is fixedly arranged on the side of the cabinet door 2 close to the mounting plate 11, and the baffle 24 is located on the outside of the mounting plate 11. The second guide plate 25 is tilted downward and fixedly arranged inside the cavity, and is used to guide the gas flowing through the top of the mounting plate 11 and the inside of the cavity to the bottom of the frequency converter cabinet 1 to dissipate heat for the electrical components 14.

[0051] When the gas blown out through the jet port 42 passes through the top of the mounting plate 11 to dissipate heat on the heat dissipating fins 12 and then enters the interior of the cavity, the gas flows downward under the action of the baffle 24, and is guided by the second guide plate 25 and then blown to the bottom of the frequency converter cabinet 1 to dissipate heat for the electrical components 14, so as to ensure that the electrical components 14 arranged at the bottom of the frequency converter cabinet 1 dissipate heat normally.

[0052] Reference Figure 3 and Figure 4 In order to achieve effective heat dissipation of the electrical components 14 on the top of the partition 13, a first guide plate 17 is fixedly arranged on the inner side of the frequency conversion cabinet 1, which is used to guide the gas to the top of the partition 13 for flow and heat dissipation; a first air port 422 is opened on the top of the jet port 42, and a side sealing plate 43 is slidably arranged on the side of the jet port 42 close to the heat dissipation fins 12, and a top sealing plate 44 is slidably arranged on the top of the jet port 42, the side sealing plate 43 and the top sealing plate 44 are fixedly arranged, and an electric push rod 45 is arranged on the top of the top sealing plate 44, and the electric push rod 45 is fixedly arranged inside the frequency conversion cabinet 1 for driving the top sealing plate 44 to slide; wherein, a second through hole 431 is opened on the inner side of the side sealing plate 43 corresponding to the second air port 421, and a first through hole 441 is opened on the inner side of the top sealing plate 44 corresponding to the first air port 422, and the first through hole 441 and the second through hole 431 are staggered in the vertical direction, and are respectively used to separately close the first air port 422 and the second air port 421.

[0053] Specifically, a sensor for detecting the temperature of the electrical component 14 is fixedly arranged inside the frequency converter cabinet 1. When the temperature of the electrical component 14 is too high, the electric push rod 45 drives the top sealing plate 44 to drive the side sealing plate 43 to slide, so that the first through hole 441 on the inner side of the top sealing plate 44 is aligned with the first air port 422 at the top of the jet port 42. At this time, the second through hole 431 on the inner side of the side sealing plate 43 and the second air port 421 are staggered with each other, so that the side sealing plate 43 seals the second air port 421 to ensure that the gas flows upward through the first air port 422 and is blown toward the electrical component 14 under the action of the first guide plate 17, thereby realizing efficient heat dissipation of the electrical component 14.

[0054] Reference Figure 3 and Figure 5 A grid plate 26 is fixedly installed inside the cavity on the inner side of the cabinet door 2. The grid plate 26 is tilted upward to hinder the upward flow of gas flowing through the heat dissipation fins 12 to ensure the stability of the downward flow of gas. At the same time, it can ensure that the air flowing through the top of the partition 13 flows downward through the grid inside the grid plate 26 to realize the circulation of gas.

[0055] Reference Figure 1 , Figure 2 and Figure 3 A guide member 15 is fixedly provided on the outer side of the frequency converter cabinet 1 , a sliding member 21 is fixedly provided on the outer side of the cabinet door 2 , the sliding member 21 is slidably provided on the inner side of the guide member 15 , and a door lock 22 and a handle 23 are fixedly provided on the outer side of the cabinet door 2 .

[0056] The cabinet door 2 is pushed and pulled by the handle 23 to move horizontally, so that the cabinet door 2 drives the sliding member 21 to slide along the guide member 15 to ensure the stability of the cabinet door 2 when it is opened and closed. At this time, the guide component located on the inner side of the cabinet door 2 will not cause interference during the movement.

[0057] In summary, when the inverter cooling system for a wind turbine disclosed in the embodiment of the present application is in use, the cabinet door 2 is pulled by the handle 23 to slide along the guide member 15, and then the cabinet door 2 and the inverter cabinet 1 are locked to each other by the door lock 22. At this time, the heat dissipation fins 12 and the electrical components 14 inside the inverter cabinet 1 are in a sealed state, and the external cooler 3 outside the inverter cabinet 1 is started, and the external air is cooled by the external cooler 3 and then input into the interior of the first tube body 31, and the cooled gas is input into the interior of the air duct 4 through the first tube body 31, and then the gas is blown to each heat dissipation fin 1 through the jet port 42 on one side of the air duct 4. 2. When the gas blown out through the jet port 42 passes through the top of the mounting plate 11 to dissipate heat to the heat dissipating fins 12 and then enters the interior of the cavity, the gas flows downward under the action of the baffle 24, and is guided by the second guide plate 25 to blow to the bottom of the frequency converter cabinet 1 to dissipate heat to the electrical components 14, so as to ensure that the electrical components 14 arranged at the bottom of the frequency converter cabinet 1 dissipate heat normally, so that the gas after heat exchange is sucked out again by the external cooler 3 through the second pipe body 32, and is cooled again by the external cooler 3 and reused, so as to realize the circulating cooling of the frequency converter, and the internal air is recycled to prevent external impurities from entering the interior of the frequency converter cabinet 1.

[0058] In addition, during operation, the operating temperature of the electrical component 14 is detected by the sensor inside the frequency converter cabinet 1. When the temperature of the electrical component 14 is too high, the electric push rod 45 drives the top sealing plate 44 to drive the side sealing plate 43 to slide, so that the first through hole 441 on the inner side of the top sealing plate 44 is aligned with the first air port 422 at the top of the jet port 42. At this time, the second through hole 431 on the inner side of the side sealing plate 43 and the second air port 421 are staggered with each other, so that the side sealing plate 43 seals the second air port 421 to ensure that the gas flows upward through the first air port 422 and is blown toward the electrical component 14 under the action of the first guide plate 17, thereby achieving efficient heat dissipation of the electrical component 14, and achieving sealing and heat dissipation of the heat dissipation fins 12 while ensuring the normal operation of the electrical component 14.

Claims

1. A frequency converter cooling system for a wind turbine generator system, comprising a frequency converter cabinet (1), wherein heat dissipation fins (12) are installed in the frequency converter cabinet (1) via a mounting plate (11), wherein the heat dissipation fins (12) are arranged in an array; a cabinet door (2) is arranged on one side of the frequency converter cabinet (1), wherein: Also includes: An external cooler (3) is arranged outside the frequency conversion cabinet (1) and is used to input circulating cooling gas into the frequency conversion cabinet (1); An air duct (4) is arranged on a side of the frequency conversion cabinet (1) away from the cabinet door (2), the air duct (4) being connected to one end of the external cooler (3) and being used for blowing cooling and heat dissipation gas toward the heat dissipation fins (12); a flow guide component, arranged on a side of the cabinet door (2) facing the frequency conversion cabinet (1), and used for guiding the gas entering the frequency conversion cabinet (1) through the air duct (4) to a portion below the mounting plate (11); Wherein, the external cooler (3) comprises: A first tube body (31) connected to the air duct (4); The second pipe body (32) is connected to one side of the frequency conversion cabinet (1), and the second pipe body (32) is connected to a portion of the frequency conversion cabinet (1) located below the mounting plate (11).

2. The inverter cooling system for a wind turbine according to claim 1, characterized in that: A partition plate (13) is also provided in the frequency converter, and the partition plate (13) is provided above the heat dissipation fins (12); Electrical components (14) are installed above the partition (13) and below the mounting plate (11).

3. The inverter cooling system for a wind turbine according to claim 1, characterized in that: An air inlet (41) is provided on a side of the air duct (4) facing the first tube body (31); A jet port (42) is provided on one side of the air duct (4) close to the heat dissipation fins (12), and a plurality of the jet ports (42) are provided, each of the jet ports (42) being provided corresponding to a group of heat dissipation fins (12).

4. The inverter cooling system for a wind turbine according to claim 3, characterized in that: The jet port (42) comprises a first air port (422), and the first air port (422) is arranged towards the top of the frequency conversion cabinet (1).

5. The inverter cooling system for a wind turbine according to claim 4, characterized in that: A first guide plate (17) is provided in the frequency conversion cabinet (1); The first guide plate (17) is arranged at the top of the frequency conversion cabinet (1) corresponding to the first gas port (422), and is used to guide the gas passing through the first gas port (422).

6. The inverter cooling system for a wind turbine according to claim 4, characterized in that: The jet port (42) comprises a second air port (421), and the second air port (421) is arranged towards the corresponding heat dissipation fin (12).

7. The inverter cooling system for a wind turbine according to claim 6, characterized in that: A cavity is provided on the inner side of the cabinet door (2), and the flow guide component is located inside the cavity; The flow guide assembly comprises: a baffle (24), the baffle (24) being fixedly arranged on a side of the cabinet door (2) close to the mounting plate (11); in a working state, the baffle (24) is located outside the mounting plate (11); A second guide plate (25), the second guide plate (25) is fixedly arranged in a downwardly inclined manner inside the cavity, and is used to guide the gas flowing through the top of the mounting plate (11) and the inside of the cavity to the bottom of the frequency conversion cabinet (1).

8. The inverter cooling system for a wind turbine according to claim 6, characterized in that: A side sealing plate (43) is slidably provided on a side of the jet port (42) close to the heat dissipation fin (12), and a top sealing plate (44) is slidably provided on the top of the jet port (42); the side sealing plate (43) and the top sealing plate (44) are fixedly arranged; An electric push rod (45) is arranged on the top of the top sealing plate (44); the electric push rod (45) is fixedly arranged inside the frequency conversion cabinet (1) and is used to drive the top sealing plate (44) to slide; A second through hole (431) is provided on the inner side of the side sealing plate (43) corresponding to the second air port (421), and a first through hole (441) is provided on the inner side of the top sealing plate (44) corresponding to the first air port (422). The first through hole (441) and the second through hole (431) are arranged alternately in the vertical direction and are used to separately close the first air port (422) and the second air port (421), respectively.

9. The inverter cooling system for a wind turbine according to claim 6, characterized in that: A grid plate (26) is fixedly arranged inside the cavity on the inner side of the cabinet door (2), and the grid plate (26) is arranged to be tilted upwards, so as to prevent the gas flowing through the heat dissipation fins (12) from flowing upwards.

10. The inverter cooling system for a wind turbine according to claim 1, characterized in that: A guide member (15) is fixedly provided on the outer side of the frequency conversion cabinet (1), a sliding member (21) is fixedly provided on the outer side of the cabinet door (2), and the sliding member (21) is slidably provided on the inner side of the guide member (15).

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