A vibration damping and exciting integrated device for a wind turbine support structure

Abstract

The application relates to the field of wind turbine structure control and monitoring, in particular to a wind turbine support structure damping and exciting integrated device. The wind turbine support structure damping and exciting integrated device comprises a shell, a mass block arranged in the shell and connected to the shell, an exciting system connected to the mass block, and a damping system connected to the mass block and the exciting system. The application solves the problems of the prior art, such as the large height of the wind turbine, the large time cost and labor cost required for installing the exciting device, the poor timeliness of the wind turbine dynamic characteristic test, and the limited internal space of the wind turbine support structure, and the limited exciting effect of the separately-installed exciter.

Description

Technical Field

[0001] This invention relates to the field of wind turbine structure control and monitoring, and particularly to an integrated device for vibration reduction and excitation of wind turbine support structure. Background Technology

[0002] With the overexploitation and utilization of traditional fossil fuels such as coal and oil, the energy shortage crisis has intensified, and global environmental pollution has become increasingly serious. Wind energy, as a typical clean and renewable energy source, is an important direction for the global green and low-carbon energy transition. Wind farm construction is gradually expanding from plains and coastal areas to plateaus, deserts, and deep seas. The natural environment in which wind turbines operate is becoming increasingly harsh and complex, making them highly susceptible to severe weather events such as blizzards, typhoons, and high waves. Furthermore, with breakthroughs in low-wind-speed wind power generation technology, wind turbine structures are becoming larger to further improve wind energy utilization. This results in increasingly flexible wind turbine structures, making them more prone to wind-induced vibrations such as vortex-induced vibration, flutter, and buffeting, which in turn affect the power generation efficiency and fatigue life of wind turbines.

[0003] Because wind turbines are subjected to vibrations caused by wind loads during operation, long-term vibrations can lead to wear, fatigue, or even damage to mechanical components, affecting equipment lifespan and operational safety. Therefore, wind turbines need to employ vibration reduction measures to effectively absorb and disperse these vibrations, protecting the structure and components.

[0004] Vibration reduction measures for wind turbine structures mainly include passive, active, semi-active, and hybrid control. Passive vibration reduction devices primarily include damping energy dissipation, vibration isolation, and tuned vibration reduction. Active vibration reduction devices mainly include direct actuator control and active mass dampers. Semi-active vibration reduction devices provide variable damping or variable stiffness based on passive vibration reduction devices. Hybrid control combines the aforementioned three types of vibration reduction devices. Wind turbines are tall structures, with the largest amplitude vibrations occurring near the tower top. For such highly flexible structures, the most efficient vibration reduction devices are TMD (Tuned Mass Damper), AMD (Active Mass Damper), or a combination of both.

[0005] After encountering severe weather or operating for a period of time, wind turbines require retesting of their dynamic characteristics. Modal parameter identification of the wind turbine structure allows for the acquisition of its current dynamic characteristics and assessment of its operational status. This facilitates the development of subsequent maintenance and repair strategies, improves the power generation efficiency of the wind turbine, and ultimately enables intelligent operation and maintenance of the wind farm. Currently, vibration data is collected using sensors installed in the wind turbine (such as accelerometers and strain sensors). Modal analysis methods, such as the random subspace method, natural excitation technology, and frequency domain decomposition, are then applied to the collected vibration data under environmental excitation to obtain the wind turbine's modal parameters. Furthermore, actively exciting the wind turbine with a vibrator provides a rapid and effective way to test its dynamic characteristics.

[0006] Currently, vibration damping devices for wind turbines are mostly installed during the turbine's initial installation, while excitation devices are typically installed after a period of use. Due to the high flexibility of the wind turbine tower structure, the process of installing and arranging excitation devices is not only time-consuming but also requires repeated installation and disassembly. This increases the manpower and time costs of conducting dynamic characteristic tests on the wind turbine structure and makes it impossible to obtain the current modal parameters of the wind turbine in a timely manner, thus reducing the timeliness of dynamic characteristic testing. Furthermore, due to the limited space within the wind turbine support structure, direct excitation using excitation devices may require a reduction in the volume of the excitation device's mass block, affecting the excitation effect. Summary of the Invention

[0007] The purpose of this invention is to overcome the problems existing in the prior art, such as the large height of the wind turbine itself, the large time and manpower costs required to install the excitation device, which leads to poor timeliness of wind turbine dynamic characteristic testing, and the limited internal space of the wind turbine support structure, which limits the excitation effect of installing the exciter alone. The invention provides an integrated vibration reduction and excitation device for wind turbine support structure.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] This invention provides an integrated vibration reduction and excitation device for wind turbine support structures, comprising:

[0010] case;

[0011] A mass block, the mass block being disposed inside the housing and connected to the housing;

[0012] A vibration system, wherein the vibration system is disposed inside the housing;

[0013] A vibration damping system is disposed inside the housing, and the vibration damping system and the excitation system act on the same mass block.

[0014] The casing is housed on a platform inside the wind turbine. A mass block, also located inside the casing, adjusts the excitation and damping frequencies, thereby amplifying the excitation or damping effect and ensuring the excitation or damping force is transmitted to all parts of the wind turbine. The mass block is connected to the casing, allowing wind turbine vibrations to be transmitted through the platform to the casing, and then through the casing to the mass block; similarly, the mass block's vibrations can be transmitted through the casing to the platform, and then through the platform to the wind turbine. Since the excitation system acts on the mass block, and the mass block is connected to the casing, the excitation system does not directly contact the wind turbine, reducing damage caused by direct contact. Existing technologies use two separate excitation and damping devices, both requiring mass blocks. However, the limited internal space of the wind turbine's support structure necessitates reducing the mass block's volume, thus limiting both excitation and damping effects. This device connects the excitation and damping systems to the same mass block. Compared to existing technologies that install the excitation and damping devices separately, it eliminates the need for an additional casing and other auxiliary equipment. This provides sufficient space on the mass block, preventing limitations on both excitation and damping effects due to reduced block size. Furthermore, since both systems are connected to the same mass block, and most existing wind turbines require damping devices, this device can provide both systems in a single installation, saving time and labor costs compared to multiple installations. Moreover, when excitation is required, there's no need to install the device before testing; it can be started immediately, minimizing disruption to the timeliness of wind turbine dynamic characteristic testing.

[0015] Preferably, the mass block is connected to a walking device;

[0016] The vibration damping system includes a conductor and a magnet. The conductor and the magnet are respectively disposed on the inner wall of the housing. When the mass block moves inside the housing, it drives the conductor to cut the magnetic field lines of the magnet.

[0017] The conductor and magnet can be arranged in the following ways: the conductor is placed on the inner wall of the shell, and the magnet is placed on the mass block; or the conductor is placed on the mass block, and the magnet is placed on the inner wall of the shell. The conductor material includes, but is not limited to, iron, aluminum, and tungsten, as long as it can interact with the magnet and generate eddy currents during movement, thus functioning as an eddy current damper. The traveling device can be located on the top or bottom surface of the mass block. When the mass block is connected to the traveling device, it will move within the shell when the wind turbine vibrates due to external factors. The movement of the mass block within the shell causes the conductor to cut magnetic field lines, converting the kinetic energy of the wind turbine vibration into heat energy, thereby reducing the wind turbine's vibration.

[0018] Preferably, a back iron is provided between the conductor and the housing.

[0019] Setting up a back iron allows the magnetic field lines of the magnet to pass through the back iron as much as possible, thus making the magnetic field lines more concentrated and ensuring that more magnetic field lines can cut the conductor when the mass moves.

[0020] Preferably, the walking device is a swivel wheel.

[0021] Preferably, the vibration damping system includes a housing, the interior of which is used to hold liquid.

[0022] Preferably, the excitation system comprises:

[0023] A rotating shaft, one end of which is connected to the mass block;

[0024] An eccentric mass block is fitted around the rotating shaft, and the rotating shaft drives the eccentric mass block to rotate along the shaft.

[0025] The rotation of the shaft is driven by electricity, and the shaft rotation excites vibration. The shaft is connected to a mass block, and the eccentric mass block can move along the shaft, generating an outward centrifugal force that excites the mass block, thereby exciting the wind turbine and conducting dynamic characteristic tests on the wind turbine.

[0026] Preferably, the excitation system includes at least two shafts, with one of the eccentric mass blocks fitted over one of the shafts.

[0027] Preferably, when the excitation system includes two rotating shafts, the two eccentric mass blocks are respectively fitted onto the two rotating shafts, and the two rotating shafts rotate in opposite directions and at the same speed.

[0028] When two eccentric blocks rotate at the same speed but in opposite directions, the centrifugal forces they generate cancel each other out in space. This means that the vibrator as a whole will not produce displacement along the length of the axis of rotation, but will instead convert these forces into a resultant force perpendicular to the axis of rotation, i.e., the desired vibration direction, generating twice the simple harmonic excitation force in a single direction. This can reduce unnecessary vibration and wear of the equipment, and improve the stability and service life of the equipment.

[0029] Preferably, the excitation system comprises:

[0030] A slide rail, which is connected to the mass block;

[0031] A sliding member is slidably connected to the slide rail, and the movement of the sliding member along the slide rail causes the mass block to move.

[0032] The sliding component is driven by a motor. Moving along the slide rail, the sliding component excites the mass block, thereby causing the fan to vibrate.

[0033] Preferably, the mass block is connected to the inner wall of the housing by a spring.

[0034] The mass block is connected to the inner wall of the shell by a spring, which allows the force of the wind turbine's vibration to be transmitted to the mass block, and the mass block can also be used for vibration frequency modulation.

[0035] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0036] An integrated vibration damping and excitation device for a wind turbine support structure includes a mass block installed inside a housing and connected to the interior of the housing. This allows the wind turbine's vibrations to be directly transmitted to the mass block, and the excitation or damping forces can also be transmitted to the wind turbine through the mass block. Since the excitation and damping systems are connected to the same mass block, one less housing and other auxiliary devices are needed. The mass block has sufficient space, avoiding the limitation of limited excitation and damping effects due to reduced mass block size. Furthermore, because the excitation and damping systems are connected to the same mass block, and existing wind turbines generally require damping devices, this device can provide both systems in a single installation, saving time and labor costs compared to multiple installations. It also allows for timely activation when excitation is needed, minimizing disruption to the timeliness of wind turbine dynamic characteristic testing. This device solves the problems of existing technologies, such as the large height of wind turbines, the high time and manpower costs required to install excitation devices, the poor timeliness of wind turbine dynamic characteristic testing, and the limited internal space of wind turbine support structures, which limits the excitation effect of installing exciters alone. Attached Figure Description

[0037] Figure 1 This is a perspective view of an integrated vibration reduction and excitation device for a wind turbine support structure as described in Embodiment 1;

[0038] Figure 2 This is a front view of an integrated vibration reduction and excitation device for a wind turbine support structure as described in Embodiment 1;

[0039] Figure 3 This is a top view of an integrated vibration reduction and excitation device for a wind turbine support structure as described in Example 1;

[0040] Figure 4 This is a bottom view of an integrated vibration reduction and excitation device for a wind turbine support structure as described in Example 1;

[0041] Figure 5 This is an exploded view of an integrated vibration reduction and excitation device for a wind turbine support structure as described in Example 1;

[0042] Figure 6 This is a cross-sectional view of an integrated vibration reduction and excitation device for a wind turbine support structure as described in Embodiment 1;

[0043] Figure 7 This is a schematic diagram of the omnidirectional wheel described in Embodiment 1;

[0044] Icons: 1-Shell, 2-Top plate, 3-Back iron, 4-Copper plate, 5-Magnet, 6-Mass block, 7-Spring, 8-Motor, 9-Shaft, 10-Eccentric mass block, 11-Wheel caster, 12-Base plate. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0046] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0047] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0048] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing between identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0049] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0050] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0051] Example 1

[0052] like Figures 1 to 6 As shown, an integrated vibration damping and excitation device for a wind turbine support structure includes: a housing 1; a mass block 6 disposed inside the housing 1 and connected to the housing 1; an excitation system connected to the mass block 6; and a damping system connected to and acting on the same mass block 6. The dimensions of the mass block 6 are determined according to the specific characteristics of the wind turbine.

[0053] This device integrates the excitation component into the mass block 6 of the vibration damping system. It can dampen the wind turbine structure during vibrations and allows for real-time dynamic characteristic testing of the wind turbine structure without the need to reinstall and adjust the exciter on the wind turbine support structure. This effectively saves time and cost associated with dynamic characteristic testing, thus improving the efficiency and timeliness of the testing. Furthermore, compared to the traditional method of directly installing the exciter, this device effectively reduces the additional mass added to the wind turbine support structure during dynamic characteristic testing, ensuring the accuracy of structural dynamic characteristic identification.

[0054] Mass block 6 is connected to a walking device. This is necessary in this embodiment, such as... Figure 1 , Figure 2 and Figure 4 As shown, the bottom surface of the mass block 6 is connected to eight casters 11, enabling it to move on the top surface of the base plate 12 of the housing 1. The specific form of the casters 11 is as follows: Figure 7 As shown. In practical use, the traveling device can also be placed on the top surface of the mass block 6. If the traveling device is placed on the top surface of the mass block 6, a corresponding track needs to be installed on the bottom surface of the top plate 2 of the housing 1 to prevent the mass block 6 from falling. However, placing the traveling device on the top surface of the mass block 6 is not suitable for applications such as... Figure 1 and Figure 2This is the case where the magnet 5 is placed on the top surface of the mass block 6.

[0055] like Figures 1-6 As shown, the vibration damping system includes a conductor and a magnet 5. The conductor is disposed on the inner wall of the housing 1, and the magnet 5 is disposed on the walking device. When the mass block 6 moves inside the housing 1, the conductor cuts the magnetic field lines of the magnet 5. In this embodiment, as... Figures 1-2 and Figures 5-6 As shown, the conductor is a copper plate 4, which is disposed on the bottom surface of the top plate 2, and the plane of the copper plate 4 is parallel to the plane of the top plate 2. The conductor material includes, but is not limited to, iron, aluminum, and tungsten, as long as it can interact with the magnet and generate eddy currents when rotating, thus functioning as an eddy current damper. When the wind turbine vibrates due to external factors, the mass block 6 moves inside the housing 1. The movement of the mass block 6 inside the housing 1 drives the magnet to move, thereby causing the conductor to cut the magnetic field lines. The kinetic energy of the wind turbine vibration is converted into heat energy, thus reducing the vibration of the wind turbine. A back iron 3 is provided between the conductor and the housing 1. In this embodiment, the back iron 3 is in the form of an iron plate, disposed between the copper plate 4 and the top plate 2. The back iron can prevent the magnetic field lines of the magnet from diffusing into the air as much as possible, thereby ensuring that more magnetic field lines can cut the conductor when the mass block 6 moves. In practical use, the conductor can be placed on the inner wall of the housing 1, and the mass block 6 is connected to the inner wall of the housing 1. In this case, the back iron 3 is placed between the conductor and the inner wall of the housing 1, and the magnet 5 is also placed on the side of the mass block 6. At this time, the mass block 6 moves inside the housing 1, and the conductor will cut the magnetic field lines, forming eddy current damping. Another alternative is that the conductor can also be placed on the bottom plate 12 of the housing 1. In this case, the magnet 5 is placed on the bottom surface of the mass block 6, and the back iron 3 is placed between the conductor and the bottom plate 12.

[0056] In this embodiment, the magnet 5 is detachably mounted on the top surface of the mass block 6. For example... Figure 3 and Figures 5-6 As shown, the top surfaces of two adjacent magnets 5 have different magnetic poles; that is, the top surfaces of two adjacent magnets 5 are the N pole and the S pole, respectively. In this embodiment, the mass block 6 is a cylindrical component. Multiple magnets 5 are arranged at radial intervals along the mass block 6. In this embodiment, the magnets 5 are permanent magnets, which helps to save costs. Because in actual use, the smaller the damping of this device, the larger the excitation amplitude of the wind turbine support structure can be achieved. Therefore, when the magnets 5 are permanent magnets, the eddy current damping of the entire invention device can be adjusted by adjusting the number and arrangement of the permanent magnets, thereby achieving significant and effective excitation of the wind turbine support structure. The magnets 5 can also be replaced with electromagnets.

[0057] like Figures 4-6As shown, the excitation system includes: a rotating shaft 9, one end of which is connected to a mass block 6; and an eccentric mass block 10, which is fitted around the rotating shaft 9 and can rotate along the rotating shaft 9. The rotating shaft 9 is connected to the mass block 6, and the eccentric mass block 10 can move along the rotating shaft 9, generating an outward centrifugal force to excite the mass block 6, thereby exciting the fan and performing a dynamic characteristic test on the fan. In this embodiment, the excitation system includes two rotating shafts 9, both connected to the bottom surface of the mass block 6, and the distances from the two rotating shafts 9 to the center of the mass block 6 are equal. Two eccentric mass blocks 10 of equal size and weight are fitted around the two rotating shafts 9 respectively, and the two rotating shafts 9 rotate in opposite directions and at equal speeds. When the two eccentric blocks rotate at the same speed but in opposite directions, the centrifugal forces they generate cancel each other out in space. This means that the vibrator as a whole will not produce displacement along the length of the shaft 9, but will instead convert these forces into a resultant force perpendicular to the shaft 9, i.e., the desired vibration direction, generating a single-direction, twice-harmonic excitation force. This reduces unnecessary vibration and wear on the equipment, improving its stability and service life. Both shafts 9 are driven by motors 8, and their rotation speed is determined according to the actual conditions of the wind turbine. The weight of the mass block 6 can also be determined according to the actual conditions. In this embodiment, both shafts 9 are located on the bottom surface of the mass block 6, which not only enables excitation but also increases the mass of the mass block 6, thus enhancing the excitation and damping effects. When the magnet 5 is an electromagnet, it can be de-energized and lose its magnetism as needed during the operation of the excitation system. This avoids interference from the damping system when the excitation system is started to test the dynamic characteristics of the wind turbine, resulting in more accurate data. In practical use, the shaft 9 can consist of one shaft or three or more shafts. Furthermore, the rotation speeds of different rotating shafts 9 need not be the same.

[0058] In this embodiment, the rotating shaft 9 can also be set on the top surface of the mass block 6, but in this case, the magnet 5 needs to be set on the side or bottom surface of the mass block 6.

[0059] This device avoids direct excitation on the wind turbine's support structure and instead employs a non-destructive, non-contact excitation method. Because the excitation components are concentrated in the mass block 6 of the vibration damping system, the excitation components drive the entire mass block 6 to move during excitation, thereby completing the excitation of the wind turbine structure through the spring system. Compared with the traditional direct excitation method, the displacement amplitude of the wind turbine support structure can be significantly increased by the present invention, thus enabling accurate identification of the dynamic characteristics of the wind turbine structure.

[0060] Mass block 6 is connected to the inner wall of housing 1 via springs 7. This connection allows the force of the wind turbine's vibration to be transmitted to mass block 6, and mass block 6 can also perform vibration frequency modulation. Springs 7 also restrict the movement of mass block 6. Multiple springs 7 are evenly spaced along the circumference of mass block 6. In this embodiment, eight springs 7 are connected to the inner wall of housing 1, and the axis of each spring 7 is perpendicular to the tangent at its connection point to the inner wall of housing 1. This design ensures that both the force transmitted from housing 1 to mass block 6 and the force transmitted from mass block 6 to housing 1 are horizontal forces, which helps to guarantee the effects of excitation and vibration reduction.

[0061] The vibration damping system can also be replaced with the following:

[0062] The vibration damping system includes a housing containing a liquid. The type of liquid inside the housing is determined based on the specific circumstances. In practical use, a device with through holes can also be installed inside the housing, in which case oil is used as the liquid. When the mass block 6 moves, the liquid inside is also disturbed, and the damping force generated by the oil passing through the through holes absorbs the vibration energy. This configuration is not shown in the accompanying drawings. In this embodiment, the housing is positioned on top of the mass block 6. This arrangement not only dampens vibrations through the housing but also increases the weight of the mass block 6, thereby amplifying the excitation and damping effects.

[0063] The vibration reduction system can also be replaced with an active vibration reduction device, which uses a motor to drive the fan to vibrate autonomously by acquiring wind-induced vibrations, thereby counteracting the wind-induced vibrations.

[0064] The excitation system can also be replaced with the following:

[0065] The vibration system includes: a slide rail connected to the mass block 6; and a slider slidably connected to the slide rail. The movement of the slider is driven by a motor 8, and the size and weight of the slider are determined according to actual conditions.

[0066] The excitation system can also be replaced by: magnetostrictive exciter, electric exciter and electromagnetic exciter.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind turbine support structure vibration-damping and excitation-integrating device, characterized by, The application relates to a vibration isolation device, which comprises a shell (1), a mass block (6) arranged in the shell (1) and connected to the shell (1), a vibration exciting system arranged in the shell (1), and a vibration damping system arranged in the shell (1) and acting on the same mass block (6). The mass block (6) is connected with a walking device; the vibration damping system comprises a conductor and a magnet (5), and the conductor and the magnet (5) are arranged on the inner wall of the shell (1) and the mass block (6) respectively; when the mass block (6) moves in the shell (1), the conductor cuts the magnetic induction lines of the magnet (5). The walking device is a universal wheel (11). The vibration exciting system comprises a rotating shaft (9), one end of which is connected to the mass block (6), and an eccentric mass block (10) sleeved on the rotating shaft (9), wherein the rotating shaft (9) drives the eccentric mass block (10) to rotate along the rotating shaft (9). The vibration exciting system comprises two rotating shafts (9), and two eccentric mass blocks (10) are respectively sleeved on the two rotating shafts (9); the rotating directions of the two rotating shafts (9) are opposite, and the rotating speeds of the two rotating shafts (9) are equal. The mass block (6) is connected to the inner wall of the shell (1) through a spring (7). The shell (1) comprises a top plate (2), the conductor is a copper plate (4), the copper plate (4) is arranged on the bottom surface of the top plate (2), and the plane where the copper plate (4) is arranged is parallel to the plane where the top plate (2) is arranged. The magnet (5) is detachably arranged on the top surface of the mass block (6).

2. The integrated vibration reduction and excitation device for a wind turbine support structure according to claim 1, wherein A back iron (3) is arranged between the conductor and the shell (1).

3. The integrated vibration reduction and excitation device for a wind turbine support structure according to claim 1, wherein The vibration damping system comprises a box body, and the box body is used for containing liquid.

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