A high-voltage slip ring device and system applied to an offshore wind turbine

Abstract

The application discloses a high-voltage slip ring device applied to an offshore wind driven generator, which comprises a shell, a high-voltage guide part arranged in the shell, a transmission assembly electrically connected with the high-voltage guide part and used for current output or input, and a monitoring assembly comprising a monitoring element arranged in the shell and a collector electrically connected with the monitoring element. The high-voltage guide part is arranged in the shell, the transmission assembly is electrically connected with the high-voltage guide part, and the current of the high-voltage guide part can be converted and conducted. Meanwhile, the monitoring assembly is arranged in the shell to monitor the high-voltage guide part in real time and feedback. That is, the working process of the high-voltage guide part is monitored. The reliability and stability of the movement of the high-voltage guide part are ensured. The requirement of monitoring and protecting the voltage transmission equipment in the prior art is met.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a high-voltage slip ring device and a system thereof applied to an offshore wind turbine. Background Art

[0002] Energy is the foundation of all economic development. With increasing environmental pollution and global demand for renewable energy, wind power technology is rapidly developing due to its advantages of cleanliness, short construction cycles, and low operating costs. Based on the application environment, wind power can be categorized as plateau, land, or marine. Currently, most land resources are already occupied, while the oceans offer vast expanses and abundant resources. Therefore, offshore wind power is becoming a growing trend in renewable energy development.

[0003] Offshore wind power generation technology presents greater challenges than onshore wind power generation. First, the highly corrosive marine environment can cause corrosion to various components in the wind turbine system, including slip rings. This necessitates real-time monitoring of the equipment to ensure safety during operation and facilitate maintenance. This, in turn, necessitates monitoring and protection of voltage transmission equipment. Summary of the Invention

[0004] The purpose of the present invention is to meet the requirement of monitoring and protecting voltage transmission equipment in the prior art, and to propose a high-voltage slip ring device for offshore wind turbines.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-voltage slip ring device for an offshore wind turbine, comprising:

[0007] case;

[0008] A high-voltage guide portion, which is disposed in the housing and is used for current input or output;

[0009] A transmission component, the transmission component being electrically connected to the high-voltage guide portion and used for current output or input;

[0010] The monitoring component includes: a monitoring element and a collector. The monitoring element is arranged in the shell. The collector is electrically connected to the monitoring element. The monitoring component is used to monitor and feedback the conditions of the high-voltage guide part and the inside of the shell.

[0011] Optionally, the monitoring element includes one or more combinations of an arc sensor, a temperature sensor, a humidity sensor, and a tilt angle sensor.

[0012] Optionally, the high-voltage guide portion includes:

[0013] Two support plates, the two support plates are respectively connected to the housing and are coaxial;

[0014] an inner rotor, the inner rotor being disposed between the two support plates and being rotatably connected to the support plates;

[0015] A plurality of collector rings, wherein the collector rings are sleeved up and down on the outside of the rotor through conductive rods;

[0016] A plurality of carbon brushes, each of which is disposed on the outer wall of the slip ring via a support rod and is electrically connected to the transmission assembly;

[0017] A connecting head is provided on one of the supporting plates and is electrically connected to the collector ring.

[0018] Optionally, the transmission component includes:

[0019] transfer box;

[0020] A transmission interface end, the transmission interface end is provided on the transmission box, and the transmission interface end is electrically connected to the carbon brush;

[0021] A transmission outlet end, wherein the transmission outlet end is arranged on the transmission box, and the transmission outlet end is electrically connected to the transmission interface end.

[0022] Optionally, it further includes: an auxiliary component, the auxiliary component is electrically connected to the high voltage transmission part and / or the monitoring component

[0023] Optionally, the auxiliary components include: one or more combinations of optical fiber slip rings, signal control slip rings, communication slip rings and low-voltage power slip rings.

[0024] An offshore wind power generation system based on a high-voltage slip ring device adopts the above-mentioned high-voltage slip ring device applied to an offshore wind turbine, and further includes: a central control system;

[0025] Wherein, the central control system is electrically connected to the monitoring component, and the central control system is electrically connected to the high-voltage transmission part.

[0026] The beneficial effects of the present invention are:

[0027] By placing the high-voltage guide unit inside the housing and electrically connecting the transmission assembly to the high-voltage guide unit, the current in the high-voltage guide unit can be converted and conducted. Simultaneously, a monitoring assembly inside the housing monitors the high-voltage guide unit in real time and provides feedback, effectively monitoring the workflow of the high-voltage guide unit. This ensures the reliability and stability of the high-voltage guide unit's movement, meeting the existing requirements for monitoring and protecting voltage transmission equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a high-voltage slip ring device applied to an offshore wind turbine provided in the first embodiment of the present invention;

[0029] Figure 2 This is a schematic plan view of the overall structure of a high-voltage slip ring device for an offshore wind turbine provided in Example 1 of the present invention (viewed from the front);

[0030] Figure 3 This is a schematic plan view of the overall structure of a high-voltage slip ring device for an offshore wind turbine provided in Example 1 of the present invention (looking from above);

[0031] Figure 4 This is a schematic structural diagram of an auxiliary component of a high-voltage slip ring device applied to an offshore wind turbine provided in the first embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the inner rotor structure of a high-voltage slip ring device applied to an offshore wind turbine provided in Example 1 of the present invention.

[0033] The markings in the figure are as follows:

[0034] 1. Housing; 11. Outer stator; 111. Leading head; 112. Support plate; 12. Inner rotor; 121. Collector ring; 122. Support rod; 123. Conductive rod; 124. Carbon brush;

[0035] 2. Auxiliary components; 21. Support seat; 22. Low-voltage power slip ring; 23. Communication slip ring; 24. Fiber optic slip ring; 25. Signal control slip ring; 26. Support sleeve;

[0036] 3. Transmission assembly; 31. Transmission box; 32. Transmission outlet; 33. Transmission interface; 331. Wire;

[0037] 4. Monitoring components. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their 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 at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] Example 1

[0043] Reference Figures 1-5A high-voltage slip ring device is used in an offshore wind turbine. In actual use, the slip ring system is generally used in conjunction with a wind turbine. It can be set up and used in an offshore environment. It can also be used on land and on plateaus. In actual operation, the slip ring system needs to be connected to a central control system for communication. This allows the slip ring system to feedback data signals to the central control system at any time. This ensures that the central control system monitors and processes the feedback data signals. In this embodiment, the central control system can be a controller to receive and process the feedback data signals.

[0044] Specifically, the slip ring system includes a housing 1, a high-voltage guide, a monitoring assembly 4, and a transmission assembly 3. The high-voltage guide is located within the housing 1 and is used to transmit high-voltage power between the relative dynamic and static structures. This ensures the input and output of wind power generation. The monitoring assembly 4 is located within the housing 1, and its monitoring element is located within the high-voltage guide, meaning that the monitoring element is located within the housing 1. This facilitates real-time monitoring of the high-voltage guide and the internal environment of the housing 1, while also providing feedback to a central control system. The transmission assembly 3 is located within the housing 1 and is electrically connected to the high-voltage guide. The transmission assembly 3 converts and outputs the current signal from the high-voltage guide, ensuring voltage stability within the high-voltage guide and overall safety of the housing 1. In this embodiment, by locating the high-voltage guide within the housing 1 and electrically connecting the transmission assembly 3 to the high-voltage guide, the current in the high-voltage guide can be converted and transmitted. Simultaneously, a monitoring assembly 4 within the housing 1 monitors the high-voltage guide unit in real time and provides feedback. This monitoring ensures the reliability and stability of the high-voltage guide unit's movement, meeting existing requirements for monitoring and protecting voltage transmission equipment.

[0045] The high-voltage guide portion includes: an inner rotor 12, two outer stators 11, a plurality of carbon brushes 124, a plurality of collector rings 121, and conductive rods 123. In this embodiment, the outer stator 11 includes two support plates 112, each of which is connected to the housing 1 and coaxially arranged. The support plates 112 are used for support. The inner rotor 12 is coaxially arranged with the two support plates 112 and is rotationally connected to the two support plates 112 to enable the inner rotor 12 to rotate between the two support plates 112. The collector rings 121 are sleeved on the outer wall of the inner rotor 12 and are fixed to the outside of the inner rotor 12 via a plurality of conductive rods 123 to facilitate the transmission and transfer of electrical signals. The carbon brush 124 is in contact with the collector ring 121, and the carbon brush 124 is electrically connected to the lead-out assembly so that the current on the high-voltage output part is converted and transmitted to the transmission assembly 3, and then the transmission assembly 3 outputs the current. The carbon brush 124 is connected to the stator through the support rod 122, that is, the carbon brush 124 is supported and arranged at the collector ring 121 by the support rod 122, and is in contact with the collector ring 121. The support plate 112 is also provided with a connector 111, and the connector 111 is electrically connected to the collector ring 121 through a wire 331, so as to facilitate electrical connection with the wind turbine from the connector 111. This makes it easier to introduce current into the collector ring 121 and the inner rotor 12, and facilitates the circulation of current. In this embodiment, the number of the collector ring 121, the conductive rod 123 and the support rod 122 can be set according to the equipment requirements to meet the electrical clearance and relevant standard requirements. In this embodiment, the current of the wind turbine is introduced into the slip ring 121 inside the housing 1 through the lead 111. At this time, the slip ring 121 is energized, driving the rotor to rotate. At this time, the carbon brush 124 contacts the slip ring 121, so that the carbon brush 124 transmits the current signal to the transmission component 3 for output. That is, the stator is connected and assembled with the rotor through two support plates 112, so that the rotor can drive the slip ring 121 to rotate. The slip ring 121 and the carbon brush 124 cut the magnetic lines of force, thereby generating an induced electromotive force. Through the transmission component 3, it is connected to the loop, thereby generating current. In this embodiment, reverse input is also possible (that is, the transmission component 3 inputs current, the current enters the slip ring 121 through the carbon brush 124, and is provided to the winding (excitation winding) of the inner rotor 12 through the slip ring on the slip ring, causing the inner rotor 12 to rotate, so that the current is connected from the lead 111).

[0046] In this embodiment, to ensure the tightness of the rotational connection between the inner rotor 12 and the stator, a combined sealing structure or a magnetic fluid sealing structure is used to seal the rotational connection between the inner rotor 12 and the outer stator 11. In this embodiment, the combined sealing structure includes a clamping assembly and a sealing assembly at each end of the bearing seat and the bearing sleeve, thereby ensuring the airtightness and connection strength of the entire sealing structure. The sealing assembly and the clamping assembly are detachably connected to the bearing sleeve, facilitating disassembly and installation, as well as later replacement of components. Furthermore, the clamping assembly and the sealing assembly at each end of the bearing seat and the bearing sleeve do not interfere with the rotation between the bearing seat and the bearing sleeve, ensuring smooth rotation of the bearing seat and the bearing sleeve.

[0047] In this embodiment, the transmission assembly 3 includes a transmission box 31, a transmission interface 33, and a transmission outlet 32. The transmission box 31 is mounted on the housing 1 and supports the transmission assembly 3. The transmission interface 33 and transmission outlet 32 ​​are respectively located on the transmission box 31 and are electrically connected to each other via a wire 331 (not shown) to facilitate current input or output. The transmission interface 33 is electrically connected to the high-voltage output unit via the wire 331. Specifically, the transmission interface 33 is connected to the upper terminal on the carbon brush 124 via the wire 331 to facilitate transmission and output of the electrical signal from the carbon brush 124. In this embodiment, there are three transmission interface 33 and three transmission outlet 32, and each transmission interface 33 and transmission outlet 32 ​​are interconnected, forming three output units. In actual operation, the connection of two output units enables circuit flow, i.e., the output or input of electrical signals. In this embodiment, the output units can be configured as two or more groups (including three groups), which will not be described in detail here.

[0048] In this embodiment, the monitoring component 4 can be configured as an arc sensor (not shown in the figure), a temperature sensor (not shown in the figure), a humidity sensor (not shown in the figure) and a tilt angle sensor (not shown in the figure). It can collect the temperature and humidity inside the shell 1 in real time, and collect the tilt angle and arc signal of the high-voltage output part in real time. In this embodiment, the arc sensor, temperature sensor, humidity sensor and tilt angle sensor are all located inside the shell 1. The arc sensor is located near the carbon brush 124 on the high-voltage guide part to monitor the voltage arc in the high-voltage guide part and generate an arc signal. The temperature sensor and humidity sensor are arranged near the connection between the high-voltage output part and the shell 1 to monitor the temperature and humidity inside the shell 1 and generate a temperature and humidity signal. The tilt angle sensor is arranged on the inner wall of the shell 1. The tilt angle sensor is used to collect the fluctuating tilt angle of the shell 1 as the waves move and generate a tilt angle data signal. The monitoring component 4 also includes: a collector (not shown in the figure), which is used to receive and process the arc light signal, temperature and humidity signal, and tilt angle data signal mentioned above, and process the arc light signal, temperature and humidity signal, and tilt angle data signal, and transmit the processed data signal to the central control system for processing by the central control system. In this embodiment, the collector has a highly sensitive pulse trigger circuit that can capture rapidly flashing arc light pulse signals. A telesignaling report is sent within 10ms after the arc light occurs. At the same time, telemetry values ​​can be sent every 5 minutes. The telemetry values ​​include three-axis angles, acceleration, angular velocity, and real-time temperature and humidity.

[0049] In this embodiment, the monitoring elements in the monitoring assembly 4 include but are not limited to the arc sensor, temperature sensor, humidity sensor and tilt angle sensor.

[0050] In this embodiment, to enhance the signal feedback of the monitoring assembly 4 and ensure the normal operation of the input and output of the high-voltage guide unit, an auxiliary assembly 2 is also installed on the housing 1. This auxiliary assembly 2 includes a support base 21 and several support sleeves 26. The support base 21 is installed on the housing 1 and provides overall support. The support sleeves 26 are used to support various auxiliary components, thereby providing support and extending the service life of each auxiliary component. In this embodiment, the support sleeves 26 are provided in three different sizes. A fiber optic slip ring 24, a signal control slip ring 25, a communication slip ring 23, and a low-voltage power slip ring 22 are installed within each of these three support sleeves 26. These fiber optic slip rings 24, signal control slip rings 25, communication slip rings 23, and low-voltage power slip rings 22 are electrically connected to the inner rotor 12, ensuring the operation of the fiber optic slip rings 24, signal control slip rings 25, communication slip rings 23, and low-voltage power slip rings 22. In this embodiment, the fiber optic slip ring 24, signal control slip ring 25, communication slip ring 23, and low-voltage power slip ring 22 are arranged vertically and sequentially on the support base 21. Furthermore, the fiber optic slip ring 24 and signal control slip ring 25 can be housed within the same support sleeve, or they can be housed separately. It should be noted that in actual operation, the support sleeve 26 is positioned externally of the fiber optic slip ring 24, signal control slip ring 25, communication slip ring 23, and low-voltage power slip ring 22. That is, the fiber optic slip ring 24, signal control slip ring 25, communication slip ring 23, and low-voltage power slip ring 22 are each housed within a different type of support sleeve to extend the service life of the fiber optic slip ring 24, signal control slip ring 25, communication slip ring 23, and low-voltage power slip ring 22. Furthermore, it should be noted that in actual operation, the fiber optic slip ring 24, signal control slip ring 25, communication slip ring 23, and low-voltage power slip ring 22 can be installed according to actual requirements. That is, the optical fiber slip ring 24, the signal control slip ring 25, the communication slip ring 23 and the low-voltage power slip ring 22 can be used in conjunction with each other, or they can be set up individually, which will not be described in detail here. In this embodiment, the optical fiber slip ring 24 is set to solve the problem of optical signal transmission between relatively rotating parts, ensuring that the transmission of optical fiber signals is not interrupted due to rotation. That is, the optical fiber signal is further enhanced to facilitate the stability of the transmission and reception data signals in the monitoring component 4. The signal control slip ring 25 and the communication slip ring are used for signal transmission and exchange, that is, they can transmit the signal of the monitoring component 4 and stably ensure the accuracy and stability of signal transmission. The low-voltage power slip ring 22 is used for use in low-voltage current conditions and to power the monitoring component 4 and other equipment. The stable operation of the monitoring component 4 is guaranteed.

[0051] In the embodiment, since the shell 1 needs to be arranged on the sea surface for a long time, the inside and outside of the shell 1 need to be arranged with moisture-proof and seawater corrosion-resistant treatment. The use strength of the shell 1 is enhanced, that is, the service life of the slip ring system is indirectly increased.

[0052] Embodiment two

[0053] The offshore wind power generation system based on the high-voltage slip ring device adopts the high-voltage slip ring device applied to the offshore wind turbine, and further comprises a central control system, wherein the central control system is electrically connected with the monitoring component 4, and the central control system is electrically connected with the high-voltage transmission part. So that the slip ring system can feed back data signals to the central control system at any time. To ensure that the central control system monitors and processes according to the feedback data signals. In the embodiment, the central control system can be a controller to realize receiving and processing of the feedback data signals.

[0054] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A high-voltage slip ring device for offshore wind turbines, characterized in that: Bag include: case; A high-voltage guide portion, which is disposed in the housing and is used for current input or output; A transmission component, the transmission component being electrically connected to the high-voltage guide portion and used for current output or input; A monitoring assembly, comprising: a monitoring element and a collector, wherein the monitoring element is disposed within the housing, the collector is electrically connected to the monitoring element, and the monitoring assembly is used to monitor and provide feedback on conditions within the high-voltage guide portion and the housing; The high-voltage guide portion includes: Two support plates, the two support plates are respectively connected to the housing and are coaxial; an inner rotor, the inner rotor being disposed between the two support plates and being rotatably connected to the support plates; A plurality of collector rings, wherein the collector rings are sleeved up and down on the outside of the rotor through conductive rods; A plurality of carbon brushes, each of which is disposed on the outer wall of the slip ring via a support rod and is electrically connected to the transmission assembly; A connector, the connector being disposed on one of the support plates and electrically connected to the collector ring; The transmission component includes: transfer box; A transmission interface end, the transmission interface end is provided on the transmission box, and the transmission interface end is electrically connected to the carbon brush; A transmission outlet end, wherein the transmission outlet end is arranged on the transmission box, and the transmission outlet end is electrically connected to the transmission interface end.

2. A high-voltage slip ring device for an offshore wind turbine according to claim 1, characterized in that: The monitoring element includes: one or more combinations of an arc sensor, a temperature sensor, a humidity sensor and a tilt angle sensor.

3. The high-voltage slip ring device for offshore wind turbines according to claim 1, characterized in that: Also includes: An auxiliary component is electrically connected to the high-voltage guide portion and / or the monitoring component.

4. A high-voltage slip ring device for an offshore wind turbine according to claim 3, characterized in that: The auxiliary components include: one or more combinations of optical fiber slip rings, signal control slip rings, communication slip rings and low-voltage power slip rings.

5. An offshore wind power generation system based on a high-voltage slip ring device, using a high-voltage slip ring device for an offshore wind turbine according to any one of claims 1 to 4, characterized in that: Also includes: Central control system; Wherein, the central control system is electrically connected to the monitoring component, and the central control system is electrically connected to the high-voltage transmission part.

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