Wind power grid-connected frequency modulation control device with superconducting current limiter and control method

Abstract

The invention provides a wind power grid-connected frequency modulation control device with a superconducting current limiter and a control method. A superconducting current limiter body is arranged at the side part of a wind power grid-connected frequency modulation controller body; the wind power integration frequency modulation controller body comprises a protective shell and a mounting plate; the connecting assembly comprises a rubber telescopic sleeve, a first spring, a connecting rod, a second spring and a connecting plate; the connecting rod penetrates through the mounting plate; a preformed groove is formed in the surface of the base; the bottom end of the connecting rod is inserted into and slidably connected with the reserved groove. The bottom end of the connecting rod of each connecting assembly is fixed to a connecting plate, and the connecting plate is in sliding connection with the reserved groove. The two ends of the connecting plate are connected with the reserved grooves through second springs. The outer side of the connecting rod is sleeved with two first springs, and a rubber telescopic sleeve is arranged on the outer side of the connecting rod. The wind power integration frequency modulation controller body can be effectively buffered by moving up and down and back and forth by a certain distance; an automatic locking mode is adopted between the covering plate and the protective shell, the anti-theft effect is enhanced, and opening and closing are convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power grid-connected frequency modulation control equipment, and in particular to a wind power grid-connected frequency modulation control device with a superconducting current limiter and a control method. Background Art

[0002] The wind power grid-connected frequency control device is a power electronic control device specially used at the interface between wind farms and power grids to coordinate the power exchange between wind farms and power grids and ensure the stability of power grid frequency. It can monitor the changes in power grid frequency in real time and automatically adjust the output power of wind farms according to the preset control strategy to help maintain the stability of power grid frequency.

[0003] Existing wind power grid-connected frequency modulation control devices are generally box-type structures. In order to save wiring, many wind power grid-connected frequency modulation control devices are directly installed outdoors. When the wind power grid-connected frequency modulation control devices installed outdoors are subjected to external forces such as wind, they are easily damaged by wind vibration. In addition, the wind power grid-connected frequency modulation control devices usually use bolts to fix the box cover and the box body. The bolt fixing method is time-consuming to disassemble and assemble, and is prone to rust. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a wind power grid-connected frequency modulation control device and a control method with a superconducting current limiter, which can solve the existing problems.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] The present invention is realized through the following technical scheme: a wind power grid-connected frequency modulation control device and control method with a superconducting current limiter, comprising a wind power grid-connected frequency modulation controller body, the side of the wind power grid-connected frequency modulation controller body is provided with a superconducting current limiter body; the wind power grid-connected frequency modulation controller body comprises a protective shell and a mounting plate, the mounting plates are fixed on both sides of the protective shell, and the mounting plates are connected to the base through a plurality of connecting components; the connecting component comprises a rubber expansion sleeve, a first spring, a connecting rod, a second spring and a connecting plate; the connecting rod passes through the mounting plate, and a reserved groove is provided on the surface of the base; the bottom end of the connecting rod is inserted into and slidably connected to the reserved groove; the bottom end of the connecting rod of each of the connecting components is fixed to the connecting plate, and the connecting plate is slidably connected to the reserved groove; the two ends of the connecting plate are connected to the reserved groove through a second spring; the outer side of the connecting rod is sleeved with two first springs, and the outer side of the connecting rod is provided with a rubber expansion sleeve.

[0007] Furthermore, the connecting rod adopts a "T"-shaped structure, wherein one of the first springs is located at the top end of the mounting plate; and the other first spring is located at the bottom end of the mounting plate.

[0008] Furthermore, the wind power grid-connected frequency modulation controller body also includes a covering plate, heat dissipation holes and a protective net; the top of the protective shell is cooperatively connected with the covering plate, and a cooling fan is installed inside the protective shell; heat dissipation holes are opened on both side walls of the protective shell, and a protective net is arranged inside the heat dissipation holes.

[0009] Furthermore, the cross-section of the heat dissipation hole is an inverted "V" shaped structure, a water receiving plate is fixed to the inner wall of the protective shell, and the wind power grid-connected frequency regulation controller body also includes a circulation channel, which is opened inside the protective shell, and the bottom end of the water receiving plate is connected to the inclined part of the outer edge of the heat dissipation hole through the circulation channel.

[0010] Furthermore, locking grooves are provided on both sides of the covering plate, and a plurality of plate teeth are provided on the bottom end of the side of the covering plate; the locking grooves and the plate teeth are cooperatively connected to a locking assembly; the locking assembly includes a connecting rope, a finger ring, a locking rod and a gear; the inner wall of the protective shell is rotatably connected to a gear, and the gear is cooperatively connected to the plate teeth; a locking rod is fixed to the side of the gear, and the locking rod is cooperatively connected to the locking groove; a connecting rope is fixed to the side of the gear, and the other end of the connecting rope passes through the protective shell and is connected to the finger ring.

[0011] Furthermore, the cross section of the locking rod adopts an "L"-shaped structure, and the cross section of the covering plate adopts a "T"-shaped structure.

[0012] Furthermore, the heat dissipation holes are arranged in two rows, with a plurality of heat dissipation holes in each row; the heat dissipation holes are cooperatively connected to a cleaning component; the cleaning component is used to clean the protective net on the surface of the heat dissipation holes.

[0013] Furthermore, the cleaning assembly includes a protective plate, a fixing rod and a brush; the fixing rod is fixed to the top surface of the base, and a plurality of protective plates are fixed to the top of the fixing rod; the protective plates are arranged at intervals, and the protective plates are connected to the heat dissipation holes; a brush is provided on the side of the protective plate.

[0014] Furthermore, a plurality of rubber expansion plates are distributed on the top of the reserved groove, and a plurality of fixing holes are provided on the top of the base.

[0015] A wind power grid-connected frequency modulation control method with a superconducting current limiter includes collecting the wind farm grid operating frequency and wind speed, and judging whether the collected grid operating frequency is within a reference frequency range;

[0016] If so, the wind turbine will adjust the frequency of the wind power grid-connected system based on the collected grid operating frequency and wind speed;

[0017] Otherwise, the wind power grid-connected system shall be subjected to secondary frequency regulation.

[0018] Compared with the prior art, the beneficial effects of the present invention include:

[0019] The wind power grid-connected frequency modulation control device with a superconducting current limiter of the present invention separately arranges a wind power grid-connected frequency modulation controller body and an installation base, and connects the two through a connecting component, so that the wind power grid-connected frequency modulation controller body is kept away from the installation ground to avoid moisture problems. At the same time, the connecting component has a good buffering effect. When the wind power grid-connected frequency modulation controller body is vibrated by wind or other external factors, the wind power grid-connected frequency modulation controller body can be effectively buffered by moving up and down and forward and backward for a certain distance.

[0020] The wind power grid-connected frequency modulation controller body of the present invention utilizes the method of pressing down the cover plate to drive the gear to rotate when the cover plate is closed, and cooperates with the locking groove and the locking rod to realize that the cover plate can be locked with the protective shell when it is closed, and when opening, it is only necessary to pull the finger ring to drive the gear to reverse; the cover plate of the present invention utilizes an automatic locking method between the cover plate and the protective shell to enhance the anti-theft effect, and it is easy to open and close. Compared with traditional bolt fixing, the present invention is more convenient to use, has a more concealed structure, a better anti-theft effect, and is easy to operate.

[0021] The heat dissipation holes on the side of the wind power grid-connected frequency modulation controller body of the present invention can drive the brush to move when the wind power grid-connected frequency modulation controller body is moved and buffered by external forces such as wind. The heat dissipation holes and the surface of the protective net can be self-cleaned by the brush, thereby avoiding clogging of the protective net during long-term ventilation and heat dissipation, which affects the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of a wind power grid-connected frequency modulation control device with a superconducting current limiter according to the present invention;

[0024] Figure 2 This is a schematic diagram of the structure inside the wind power grid-connected frequency modulation controller body according to an implementation example of the present invention;

[0025] Figure 3 This invention is implemented as a case Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 4 This invention is implemented as a case Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 5 It is a structural schematic diagram of the connection components of the implementation case of the present invention.

[0028] Notes in the figure: 1. Wind power grid-connected frequency modulation controller body; 11. Mounting plate; 12. Cover plate; 121. Locking groove; 122. Plate teeth; 13. Protective shell; 14. Heat dissipation hole; 15. Flow channel; 16. Protective net; 2. Superconducting current limiter body; 3. Connecting assembly; 31. Rubber expansion sleeve; 32. First spring; 33. Connecting rod; 34. Second spring; 35. Connecting plate; 4. Base; 41. Fixing hole; 42. Reserved groove; 5. Rubber expansion plate; 6. Cooling fan; 7. Water receiving plate; 8. Locking assembly; 81. Connecting rope; 82. Finger ring; 83. Locking rod; 84. Gear; 9. Cleaning assembly; 91. Protective plate; 92. Fixing rod; 93. Brush. DETAILED DESCRIPTION

[0029] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0030] A wind power grid-connected frequency control device with a superconducting current limiter, such as Figure 1 As shown, it includes a wind power grid-connected frequency modulation controller body 1, and a superconducting current limiter body 2 is provided on the side of the wind power grid-connected frequency modulation controller body 1; the added superconducting current limiter body 2 is mainly used to limit the short-circuit current in the entire power system. Based on the properties of superconducting materials, the superconducting current limiter body 2 can present a very low resistance in normal operation, allowing current to pass without loss; when a fault occurs, the superconducting material loses its superconducting properties, and the resistance suddenly increases, thereby effectively limiting the rising rate and peak value of the fault current, protecting the key equipment in the power system from damage; the wind power grid-connected frequency modulation controller body 1 includes a protective shell 13 and a mounting plate 11, as shown Figure 2 and Figure 5As shown, mounting plates 11 are fixed on both sides of the protective shell 13, and the mounting plates 11 are connected to the base 4 through a plurality of connecting components 3; the connecting component 3 includes a rubber telescopic sleeve 31, a first spring 32, a connecting rod 33, a second spring 34 and a connecting plate 35; the cross-section of the mounting plate 11 adopts a trapezoidal structure, the connecting rod 33 passes through the mounting plate 11, and a reserved groove 42 is provided on the surface of the base 4; the bottom end of the connecting rod 33 is inserted into and slidably connected to the reserved groove 42; the bottom end of the connecting rod 33 of each of the connecting components 3 is fixed to the connecting plate 35, that is, a plurality of connecting rods 33 are connected by the connecting plate 35, and the connecting plate 35 is slidably connected to the reserved groove 42; the two ends of the connecting plate 35 are connected to the reserved groove 42 by the second spring 34; the outer side of the connecting rod 33 is sleeved with two first springs 32, and the outer side of the connecting rod 33 is provided with a rubber telescopic sleeve 31. The connecting rod 33 adopts a "T"-shaped structure, wherein one of the first springs 32 is located at the top of the mounting plate 11; the other first spring 32 is located at the bottom of the mounting plate 11. This allows the wind power grid-connected frequency modulation controller body 1 to float up and down and forward and backward for buffering when subjected to vibrations caused by wind or other external factors; specifically, when the wind power grid-connected frequency modulation controller body 1 compresses the first springs 32 at both ends of the mounting plate 11, it can float up and down for buffering; when the wind power grid-connected frequency modulation controller body 1 compresses the second springs 34 at both ends of the connecting plate 35, it can float forward and backward for buffering.

[0031] The wind power grid-connected frequency modulation control device with a superconducting current limiter of the present invention separately arranges a wind power grid-connected frequency modulation controller body 1 and an installed base 4, and connects the two through a connecting component 3, so that the wind power grid-connected frequency modulation controller body 1 is kept away from the installed ground to avoid moisture problems. At the same time, the connecting component 3 has a good buffering effect. When the wind power grid-connected frequency modulation controller body 1 is vibrated by wind or other external factors, the wind power grid-connected frequency modulation controller body 1 can be effectively buffered by moving up and down and forward and backward for a certain distance.

[0032] In order to facilitate the inspection of the internal condition of the wind power grid-connected frequency modulation controller body 1, the wind power grid-connected frequency modulation controller body 1 also includes a cover plate 12, a heat dissipation hole 14 and a protective net 16; the top of the protective shell 13 is connected with the cover plate 12, and opening and closing the cover plate 12 is used to inspect the electronic components in the protective shell 13; in order to extend the service life of the internal components and dissipate heat when the wind power grid-connected frequency modulation controller body 1 is working, a cooling fan 6 is installed inside the protective shell 13; heat dissipation holes 14 are opened on both side walls of the protective shell 13, and the heat dissipation holes 14 on both sides of the protective shell 13 are used to form a channel for the circulation of heat dissipation air inside, which is convenient for the heat dissipation air to enter and exit and take away heat, and in order to prevent mosquitoes and the like from entering the wind power grid-connected frequency modulation controller body 1, a protective net 16 is provided in the heat dissipation hole 14.

[0033] In order to avoid the entry of external moisture as much as possible, the cross section of the heat dissipation hole 14 is an inverted "V" shaped structure, and a water receiving plate 7 is fixed to the inner wall of the protective shell 13. The cross section of the water receiving plate 7 adopts a triangular structure. The water receiving plate 7 is used to collect water vapor generated on the surface of the protective shell 13, especially during the return of the south wind. The wind power grid-connected frequency modulation controller body 1 also includes a circulation channel 15, which is opened inside the protective shell 13, and the bottom end of the water receiving plate 7 is connected to the inclined part of the outer edge of the heat dissipation hole 14 through the circulation channel 15, so as to facilitate the discharge of water. When water enters the protective shell 13 through the connection between the cover plate 12 and the protective shell 13 or water vapor condenses into water droplets and gathers on the inner wall of the protective shell, it will be collected by the water receiving plate 7, and the water receiving plate 7 can be discharged through the circulation channel 15 in conjunction with the heat dissipation hole 14. Therefore, the wind power grid-connected frequency modulation controller body 1 of the present invention can collect and discharge a small amount of water entering the connection and the water droplets condensed on the inner wall to avoid affecting the internal electronic devices.

[0034] In order to achieve the locking of the cover plate 12 and facilitate the opening of the cover plate 12 by the maintenance personnel, locking grooves 121 are provided on both sides of the cover plate 12, and a plurality of plate teeth 122 are provided at the bottom end of the side of the cover plate 12; the locking grooves 121 and the plate teeth 122 cooperate to connect the locking assembly 8; the locking assembly 8 includes a connecting rope 81, a finger ring 82, a locking rod 83 and a gear 84; Figure 2 and Figure 3 As shown, the inner wall of the protective shell 13 is rotatably connected with a gear 84, and the gear 84 cooperates with the connecting plate teeth 122; a locking rod 83 is fixed to the side of the gear 84, and the locking rod 83 cooperates with the locking groove 121; a connecting rope 81 is fixed to the side of the gear 84, and the connecting rope 81 passes through the protective shell 13 and is connected to the finger ring 82. The cross section of the locking rod 83 adopts an "L"-shaped structure, and the cross section of the cover plate 12 adopts a "T"-shaped structure. When the covering plate 12 is pressed down to cover the top of the protective shell 13, as the covering plate 12 moves downward, the plate teeth 122 of the covering plate 12 mesh with the gear 84, and the covering plate 12 continues to move downward, which can drive the gear 84 to rotate until it rotates to the locking rod 83 and inserts into the locking groove 121, thereby completing the locking of the covering plate 12 and the protective shell 13; when it is necessary to open the covering plate 12, the connecting rope 81 is pulled through the finger ring 82, and the gear 84 is driven to reverse through the connecting rope 81, so that the locking rod 83 is pulled out of the locking groove 121, and the covering plate 12 is driven to move upward through the reversal of the gear 84, so as to facilitate the opening of the covering plate 12.

[0035] The wind power grid-connected frequency modulation controller body 1 of the present invention, when the covering plate 12 is closed, uses the method of pressing down the covering plate 12 to drive the gear 84 to rotate, cooperates with the locking groove 121 and the locking rod 83, so that the covering plate 12 can be locked with the protective shell 13 when it is closed, and when opening, it is only necessary to pull the finger ring 82 to drive the gear 84 to reverse; the covering plate 12 of the present invention and the protective shell 13 use an automatic locking method to enhance the anti-theft effect, and it is easy to open and close. Compared with traditional bolt fixing, the present invention is more convenient to use, the structure is more concealed, the anti-theft effect is better, and it is easy to operate.

[0036] In order to clean the protective net 16 on the surface of the heat dissipation hole 14, the heat dissipation hole 14 is provided with two rows, each row is provided with a plurality of; the heat dissipation hole 14 is connected with a cleaning component 9; the cleaning component 9 is used to clean the protective net 16 on the surface of the heat dissipation hole 14. The cleaning component 9 includes a protective plate 91, a fixing rod 92 and a brush 93; Figure 4 As shown, the fixing rod 92 is fixed to the top surface of the base 4, and a plurality of protective plates 91 are fixed to the top of the fixing rod 92; the protective plates 91 are arranged at intervals, that is, a protective plate 91 is arranged for every other heat dissipation hole 14, and the protective plates 91 are connected to the heat dissipation holes 14; a brush 93 is provided on the side of the protective plate 91. A plurality of rubber expansion plates 5 are distributed at the top of the reserved groove 42, and a plurality of fixing holes 41 are provided at the top of the base 4. Exemplarily, in the initial state, a row of heat dissipation holes 14 at the bottom are connected to the cleaning component 9, and a protective plate 91 is connected to every other heat dissipation hole 14 in the bottom row, so that the protective plates 91 can be used to clean the surrounding heat dissipation holes 14 when the wind power grid-connected frequency modulation controller body 1 is moved for buffering.

[0037] When the wind power grid-connected frequency modulation controller body 1 shakes due to wind force or the like, for example, when it shakes up and down, since the position of the cleaning component 9 remains unchanged, the brush 93 brushes and cleans the protective nets 16 on the sides of the upper and lower rows of heat dissipation holes 14 when the wind power grid-connected frequency modulation controller body 1 moves up and down; when the wind power grid-connected frequency modulation controller body 1 moves forward and backward, the wind power grid-connected frequency modulation controller body 1 can move in the reserved slot 42, and since the position of the cleaning component 9 remains unchanged, the brush 93 brushes and cleans the protective nets 16 on the sides of the front and rear heat dissipation holes 14 of the corresponding heat dissipation holes 14 when the wind power grid-connected frequency modulation controller body 1 moves forward and backward.

[0038] The heat dissipation holes 14 on the side of the wind power grid-connected frequency modulation controller body 1 of the present invention can drive the brush 93 to move when the wind power grid-connected frequency modulation controller body 1 is moved and buffered by external forces such as wind. The heat dissipation holes 14 and the surface of the protective net 16 can be self-cleaned by the brush 93 to avoid clogging of the protective net 16 during long-term ventilation and heat dissipation, thereby affecting the heat dissipation effect.

[0039] When the present invention is in use, the entire control device is fixed by means of the fixing hole 41 with bolts, etc. When in use, when the wind power grid-connected frequency modulation controller body 1 moves up and down, forward and backward due to external forces such as wind, the first spring 32 and the second spring 34 can buffer the fluctuations. At the same time, when the wind power grid-connected frequency modulation controller body 1 moves, the fixed cleaning component 9 can clean the heat dissipation hole 14 and the surface of the protective net 16; when it is necessary to open the cover plate 12 for the inspection of the internal electrical components, the connecting rope 81 is pulled by the finger ring 82, and the connecting rope 81 is pulled by the finger ring 82. The gear 84 is driven to reverse, so that the locking rod 83 is pulled out from the locking groove 121, and the covering plate 12 is driven to move upward by the reverse rotation of the gear 84 to facilitate opening of the covering plate 12; when the inspection is completed and the covering plate 12 needs to be closed, when the covering plate 12 is pressed down to the top of the protective shell 13, as the covering plate 12 moves downward, the plate teeth 122 engage with the gear 84, and the covering plate 12 continues to move downward, which can drive the gear 84 to rotate until it rotates to the locking rod 83 and is inserted into the locking groove 121, thereby completing the locking of the covering plate 12 and the protective shell 13.

[0040] The present invention also provides a wind power grid-connected frequency modulation control method with a superconducting current limiter, comprising:

[0041] Collect the wind farm grid operating frequency and wind speed, and determine whether the collected grid operating frequency is within the reference frequency range;

[0042] If so, the wind turbine will adjust the frequency of the wind power grid-connected system based on the collected grid operating frequency and wind speed;

[0043] Otherwise, the wind power grid-connected system shall be subjected to secondary frequency regulation.

[0044] The present invention monitors the grid operating frequency and wind speed in real time, and the controller can dynamically adjust the operating parameters of the wind turbine set, thereby achieving grid frequency stability; at the same time, frequency deviation feedback control is used to achieve frequency self-recovery while reducing power fluctuations, ensuring that no over-limit problems occur during the entire frequency regulation process.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0048] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A wind power grid-connected frequency modulation control device with a superconducting current limiter, characterized in that: The invention comprises a wind power grid-connected frequency modulation controller body (1), wherein a superconducting current limiter body (2) is arranged on the side of the wind power grid-connected frequency modulation controller body (1); the wind power grid-connected frequency modulation controller body (1) comprises a protective shell (13) and a mounting plate (11), the mounting plates (11) are fixed on both sides of the protective shell (13), and the mounting plates (11) are connected to a base (4) through a plurality of connecting components (3); the connecting components (3) comprise a rubber expansion sleeve (31), a first spring (32), a connecting rod (33), a second spring (34) and a connecting plate (35); the connecting rod (33) penetrates The surfaces of the mounting plate (11) and the base (4) are provided with a reserved groove (42); the bottom end of the connecting rod (33) is inserted into and slidably connected to the reserved groove (42); the bottom end of the connecting rod (33) of each connecting assembly (3) is fixed to a connecting plate (35), and the connecting plate (35) is slidably connected to the reserved groove (42); the two ends of the connecting plate (35) are connected to the reserved groove (42) via a second spring (34); the outer side of the connecting rod (33) is sleeved with two first springs (32), and the outer side of the connecting rod (33) is provided with a rubber telescopic sleeve (31).

2. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 1, characterized in that: The connecting rod (33) adopts a "T"-shaped structure, wherein one of the first springs (32) is located at the top end of the mounting plate (11); and the other first spring (32) is located at the bottom end of the mounting plate (11).

3. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 1, characterized in that: The wind power grid-connected frequency modulation controller body (1) also includes a cover plate (12), a heat dissipation hole (14) and a protective net (16); the top of the protective shell (13) is cooperatively connected with the cover plate (12), and a heat dissipation fan (6) is installed inside the protective shell (13); the two side walls of the protective shell (13) are provided with heat dissipation holes (14), and a protective net (16) is arranged inside the heat dissipation holes (14).

4. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 3, characterized in that: The cross section of the heat dissipation hole (14) is an inverted "V"-shaped structure, a water receiving plate (7) is fixed to the inner wall of the protective shell (13), and the wind power grid-connected frequency modulation controller body (1) also includes a circulation channel (15), the circulation channel (15) is opened inside the protective shell (13), and the bottom end of the water receiving plate (7) is connected to the inclined portion of the outer edge of the heat dissipation hole (14) through the circulation channel (15).

5. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 3, characterized in that: The two sides of the covering plate (12) are provided with locking grooves (121), and the bottom end of the side of the covering plate (12) is provided with a plurality of plate teeth (122); the locking grooves (121) and the plate teeth (122) are matched to be connected to the locking assembly (8); the locking assembly (8) comprises a connecting rope (81), a finger ring (82), a locking rod (83) and a gear (84); the inner wall of the protective shell (13) is rotatably connected to a gear (84), and the gear (84) is matched to be connected to the plate teeth (122); a locking rod (83) is fixed to the side of the gear (84), and the locking rod (83) is matched to be connected to the locking groove (121); a connecting rope (81) is fixed to the side of the gear (84), and the other end of the connecting rope (81) passes through the protective shell (13) and is connected to the finger ring (82).

6. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 5, characterized in that: The cross section of the locking rod (83) is an "L"-shaped structure, and the cross section of the covering plate (12) is a "T"-shaped structure.

7. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 3, characterized in that: The heat dissipation holes (14) are provided in two rows, with a plurality of heat dissipation holes in each row; the heat dissipation holes (14) are connected to a cleaning assembly (9); the cleaning assembly (9) is used to clean the protective net (16) on the surface of the heat dissipation holes (14).

8. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 7, characterized in that: The cleaning assembly (9) comprises a protective plate (91), a fixing rod (92) and a brush (93); the fixing rod (92) is fixed to the top surface of the base (4), and a plurality of protective plates (91) are fixed to the top of the fixing rod (92); the protective plates (91) are arranged at intervals, and the protective plates (91) are connected to the heat dissipation holes (14); and the side of the protective plate (91) is provided with a brush (93).

9. A wind power grid-connected frequency modulation control device with a superconducting current limiter according to claim 1, characterized in that: A plurality of rubber expansion plates (5) are distributed on the top of the reserved groove (42), and a plurality of fixing holes (41) are provided on the top of the base (4).

10. A method for controlling wind power grid-connected frequency modulation with a superconducting current limiter, according to the control method of a wind power grid-connected frequency modulation control device with a superconducting current limiter according to any one of claims 1 to 9, characterized in that: include Collect the wind farm grid operating frequency and wind speed, and determine whether the collected grid operating frequency is within the reference frequency range; If so, the wind turbine will adjust the frequency of the wind power grid-connected system according to the collected grid operating frequency and wind speed; Otherwise, the wind power grid-connected system shall be subjected to secondary frequency regulation.

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