A high-voltage flexible cable for wind power generation with an internal monitoring module

Abstract

The application relates to the technical field of power cables, in particular to a high-voltage flexible cable with an internal monitoring module for wind power generation, which comprises a conductor and an optical fiber, and the outer side of the conductor is sequentially wrapped with a first wrapping tape, an inner shielding layer, an insulation layer, an outer shielding layer, a second wrapping tape, a metal shielding layer, a third wrapping tape and an outer sheath. The high-voltage flexible cable with the internal monitoring module for wind power generation is provided with an internal detection cover with an internally-mounted built-in signal transmission line on the inner side of the outer sheath, and the internal detection cover is provided with a detachable pressure module, a temperature sensor module and a humidity sensor module which are matched with the built-in signal transmission line, so that the states of different positions of the cable can be monitored, and the safety of the wind power generator set is improved; and through the detachable structure design, the front assembly and the later maintenance and repair can be facilitated.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, and in particular to a high-voltage flexible cable for wind power generation with an internal monitoring module. Background Technology

[0002] Due to geographical location and wind resource constraints, future offshore wind farms will gradually expand into deeper waters, with wind turbine capacities increasing and power transmission systems reaching higher voltage levels. Compared to 66kV high-voltage torsion-resistant cables, 110kV high-voltage torsion-resistant cables have higher requirements in terms of cable materials, manufacturing processes, and operation and maintenance. Limited by the availability of flexible high-voltage insulation materials, shielding materials, and high-cleanliness processes for high-voltage torsion-resistant cables, the highest voltage level for wind power cables both domestically and internationally currently only reaches 66kV, hindering the development of ultra-high-power offshore wind turbines in China. Therefore, there is an urgent need to overcome these technological bottlenecks, and the market urgently requires the development of a 110kV high-voltage torsion-resistant cable suitable for high-power offshore wind turbines.

[0003] Currently, the torsion-resistant cables on the market only improve the torsion resistance of the cables through their internal structure, but they cannot monitor the internal operating state of the cable in real time when it is twisted. Their functionality is very limited and their safety is not high. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an improved high-voltage flexible cable for wind power generation with an internal monitoring module in order to solve the problems of existing torsion-resistant cables on the market that cannot monitor the internal operating state of the cable in real time, have very limited functionality, and are not very safe.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: a high-voltage flexible cable for wind power generation with an internal monitoring module, comprising a conductor and an optical fiber. The outer surface of the conductor is sequentially wrapped with a first wrapping tape, an inner shielding layer, an insulation layer, an outer shielding layer, a second wrapping tape, a metal shielding layer, a third wrapping tape, and an outer sheath. The optical fiber is disposed between the metal shielding layer and the third wrapping tape. An internal detection cover is disposed between the metal shielding layer and the third wrapping tape. Multiple circular detection holes are opened on the side wall of the internal detection cover. An external recessed mounting groove is opened on the outer side of the internal detection cover at the opening position of the circular detection holes. A detachable pressure module for monitoring internal pressure changes is inserted into the external recessed mounting groove. An internal signal transmission line for transmitting signals from the detachable pressure module is installed inside the internal detection cover.

[0006] An internal support frame is provided between the internal detection cover and the built-in signal transmission line. One end of the internal support frame is fixedly connected to the inner side of the internal detection cover, and the other end of the internal support frame has an integrated arc-shaped support foot for improving the protection of the built-in signal transmission line.

[0007] The outer side of the internal detection cover is provided with a lateral mounting slot on one side of the external sunken assembly groove.

[0008] The detachable pressure module has an integrated limiting seat that protrudes into the circular detection hole near the end of the built-in signal transmission line.

[0009] The limiting seat has an external sealing cover located inside the lateral mounting slot on its outer side.

[0010] The internal detection cover has an internal limiting strip protruding into the gap between the metal shielding layer and the third package end.

[0011] The internal limiting strip has a built-in detection chamber, and a temperature sensor module is fixedly installed inside the built-in detection chamber.

[0012] A humidity sensor is fixedly mounted on the inner side of the outer sealing cover.

[0013] The output terminals of the detachable pressure module, temperature sensor module, and humidity sensor are all electrically connected to the built-in signal transmission line receiver via a signal transmission line.

[0014] The beneficial effects of this invention are:

[0015] (1) The high-voltage flexible cable for wind power generation with an internal monitoring module of the present invention has an internal detection cover with an internally installed built-in signal transmission line on the inner side of the outer sheath. The internal detection cover is equipped with a detachable pressure module, a temperature sensor module and a humidity sensor that cooperate with the built-in signal transmission line, which can monitor the status of the cable at different positions and improve the safety of the wind turbine generator set.

[0016] (2) By adopting a detachable structural design, it is convenient for pre-assembly and subsequent maintenance and repair;

[0017] (3) Through the built-in structure design, while ensuring the safety of the cable, the temperature, pressure and humidity values ​​inside the cable can be monitored in real time, and the data can be transmitted to the remote monitoring terminal in real time and quickly, thereby improving the efficiency of later management and reducing the cost of testing and maintenance.

[0018] (4) An internal limiting strip protrudes into the metal shielding layer on the end of the internal detection cover near the third wrapping, which not only improves the internal assembly stability of the internal detection cover and improves the monitoring accuracy, but also further improves the anti-torsion performance. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal detection cover in this invention.

[0022] Figure 3 This is an inner sectional view of the inner detection cover in this invention. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Figure 1 , Figure 2 and Figure 3 The high-voltage flexible cable for wind power generation shown includes a conductor 1 and an optical fiber 2. The outer surface of the conductor 1 is wrapped with a first wrapping tape 3, an inner shielding layer 4, an insulation layer 5, an outer shielding layer 6, a second wrapping tape 7, a metal shielding layer 8, a third wrapping tape 9, and an outer sheath 10. The optical fiber 2 is disposed between the metal shielding layer 8 and the third wrapping tape 9. An internal detection cover 11 is disposed between the metal shielding layer 8 and the third wrapping tape 9. Two circular detection holes are opened on the side wall of the internal detection cover 11. An external recessed mounting groove is opened on the outer side of the internal detection cover 11 at the opening position of the circular detection holes. A detachable pressure module 12 for monitoring internal pressure changes is inserted into the external recessed mounting groove. An internal signal transmission line 13 for transmitting signals from the detachable pressure module 12 is installed inside the internal detection cover 11.

[0026] Circular detection holes are made on three planes of the cross-section of the internal detection cover 11. The angle and position of the cable twist are determined by the pressure change of the detachable pressure module 12 on different cross-sections. When the pressure decreases, it indicates that the cable is bent in the opposite direction, and when it increases, it indicates that the cable is bent in the direction of the detachable pressure module 12.

[0027] To improve the internal support and limiting performance, an internal support frame 14 is provided between the internal detection cover 11 and the built-in signal transmission line 13. One end of the internal support frame 14 is fixedly connected to the inner side of the internal detection cover 11, and the other end of the internal support frame 14 has an integrated arc-shaped support foot 15 for improving the protection of the built-in signal transmission line 13.

[0028] To facilitate lateral assembly, the outer side of the internal inspection cover 11 is provided with lateral mounting slots on one side of the external recessed assembly groove.

[0029] To facilitate assembly, the detachable pressure module 12 has an integral limiting seat 16 protruding into the circular detection hole near the end of the built-in signal transmission line 13.

[0030] To facilitate lateral limiting and sealing, the outer side of the limiting seat 16 has an external sealing cover 17 located within the lateral mounting slot.

[0031] The inner wall of the side mounting slot opening has a narrow strip, which is secured inside the side mounting slot by inserting the outer sealing cap 17 into the narrow strip.

[0032] To enhance the limiting capability of the internal detection cover 11, the internal detection cover 11 has an internal limiting strip 18 protruding into the lateral gap of the metal shielding layer 8 on the end near the third packing strap 9.

[0033] To facilitate the detection of the temperature inside the cable, the internal limit clip 18 has a built-in detection chamber, and a temperature sensor module 19 is fixedly installed inside the built-in detection chamber.

[0034] In order to monitor the humidity at the assembly end, a humidity sensor 20 is fixedly mounted on the inner side of the outer sealing cover 17.

[0035] The detachable pressure module 12, temperature sensor module 19, and humidity sensor 20 are all existing technologies.

[0036] To facilitate the connection and signal transmission of internal devices, the outputs of the detachable pressure module 12, temperature sensor module 19, and humidity sensor 20 are all electrically connected to the receiver of the built-in signal transmission line 13 via the signal transmission line.

[0037] Multiple signal transmission lines are set at the receiving end of the built-in signal transmission line 13, and then connected to the contacts at the output ends of the detachable pressure module 12, temperature sensor module 19 and humidity sensor 20.

[0038] The high-voltage flexible cable for wind power generation of the present invention, with an internal monitoring module, has an internal detection cover 11 with an internally mounted built-in signal transmission line 13 on the inner side of the outer sheath 10. The internal detection cover 11 is equipped with a detachable pressure module 12, a temperature sensor module 19, and a humidity sensor 20 that cooperate with the built-in signal transmission line 13. This allows for monitoring of the cable's condition at different locations, improving the safety of the wind turbine generator. The detachable structure design facilitates pre-assembly and subsequent maintenance. The built-in structure design ensures cable safety while allowing real-time monitoring of internal temperature, pressure, and humidity values, transmitting data quickly and efficiently to a remote monitoring terminal, improving subsequent management efficiency and reducing inspection and maintenance costs. An internal limiting strip 18 protrudes laterally into the metal shielding layer 8 near the end of the internal detection cover 11 near the third sheath 9, which not only improves the internal assembly stability and monitoring accuracy of the internal detection cover 11 but also further enhances its torsional resistance.

[0039] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-voltage flexible cable for wind power generation with an internal monitoring module, comprising a conductor (1) and an optical fiber (2), characterized in that: The conductor (1) is wrapped with a first wrapping tape (3), an inner shielding layer (4), an insulating layer (5), an outer shielding layer (6), a second wrapping tape (7), a metal shielding layer (8), a third wrapping tape (9), and an outer sheath (10) in sequence. The optical fiber (2) is disposed between the metal shielding layer (8) and the third wrapping tape (9). An internal detection cover (11) is disposed between the metal shielding layer (8) and the third wrapping tape (9). Multiple circular detection holes are opened on the side wall of the internal detection cover (11). An external recessed assembly groove is opened on the outer side of the internal detection cover (11) at the opening position of the circular detection holes. A detachable pressure module (12) for monitoring internal pressure changes is inserted into the external recessed assembly groove. An internal signal transmission line (13) for transmitting signals of the detachable pressure module (12) is installed inside the internal detection cover (11). The outer side of the internal detection cover (11) is provided with a lateral mounting slot on one side of the external sunken assembly groove; The detachable pressure module (12) has an integral structure limiting seat (16) protruding into the circular detection hole near the end of the built-in signal transmission line (13). The limiting seat (16) has an external sealing cover (17) located in the lateral mounting slot on the outside.

2. A high-voltage flexible cable for wind power generation with an internal monitoring module as described in claim 1, characterized in that: An internal support frame (14) is provided between the internal detection cover (11) and the built-in signal transmission line (13). One end of the internal support frame (14) is fixedly connected to the inner side of the internal detection cover (11), and the other end of the internal support frame (14) has an integrated arc-shaped support foot (15) for improving the protection of the built-in signal transmission line (13).

3. A high-voltage flexible cable for wind power generation with an internal monitoring module as described in claim 1, characterized in that: The internal detection cover (11) has an internal limiting strip (18) protruding into the metal shielding layer (8) at the end near the third wrapping (9).

4. A high-voltage flexible cable for wind power generation with an internal monitoring module as described in claim 3, characterized in that: The internal limiting strip (18) has a built-in detection chamber, and a temperature sensor module (19) is fixedly installed inside the built-in detection chamber.

5. A high-voltage flexible cable for wind power generation with an internal monitoring module as described in claim 1, characterized in that: A humidity sensor (20) is fixedly mounted on the inner side of the outer sealing cover (17).

6. A high-voltage flexible cable for wind power generation with an internal monitoring module according to claim 5, characterized in that: The output terminals of the detachable pressure module (12), temperature sensor module (19) and humidity sensor (20) are all electrically connected to the receiver of the built-in signal transmission line (13) via the signal transmission line.

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