Offshore wind turbine GIS

Abstract

The invention relates to the field of GIS box body structures, in particular to an offshore wind turbine GIS which comprises a circuit breaker and cable cabins arranged on the two opposite sides of the circuit breaker, a control cubicle is installed on the top of one cable cabin, the cable cabins and the control cubicle use the same box body, the box body comprises a U-shaped main box plate which is integrally bent, and the U-shaped main box plate is provided with a U-shaped groove. An opening of the U-shaped main box plate faces the arrangement direction of the circuit breaker and the cable cabin, the box body further comprises box wall plates connected to the two sides of the U-shaped main box plate, a reinforcing support is arranged above the circuit breaker, the two ends of the reinforcing support are connected with the cable cabin and the control cubicle on the two sides of the circuit breaker respectively, and the box wall plates are welded to the two sides of the U-shaped main box plate. And the reinforcing bracket is clamped between the cable cabin and the control cubicle on the two sides of the circuit breaker, so that the structure of the box body is reinforced, the welding seam is effectively prevented from cracking, the shock resistance of the offshore wind turbine GIS is enhanced, and the problem of poor shock resistance of the offshore wind turbine GIS in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of GIS framework, and in particular to an offshore wind turbine GIS. Background Art

[0002] Wind turbine power generation is currently the most common power generation mode in offshore wind power technology. The current generated by the rotation of the wind turbine rotor is input into the switch device through the wind turbine end cable, and then transmitted to the outside through the sea end cable. Since offshore wind turbines vibrate with the seawater during operation and earthquakes occur frequently at sea, switchgear installed at high positions may collapse and be damaged due to high-frequency vibrations. Switchgear cannot be installed at high positions. Therefore, offshore wind turbine power generation technology often uses a relatively small GIS installed at the bottom of the wind turbine tower as a switchgear for power transmission operations. The current generated by the rotation of the wind turbine is transmitted from the wind turbine end cable to the sea end cable through the GIS installed at the bottom of the wind turbine. For example, a tower high-voltage switchgear cable compartment provided by the Chinese utility model patent with announcement number CN218549306U is provided with a modular wind turbine end cable compartment and a sea cable end cable compartment, and pressure relief devices are provided on both cable compartments. The number of cable compartments can be flexibly adjusted according to actual on-site usage requirements; multiple flanges are provided on the cable compartment shell to connect other electronic components. This solution uses modularly arranged cable compartments and pressure relief devices to improve the overall safety of the cable compartment, and the cable compartment can also integrate various components such as mutual inductors and lightning arresters, which is highly intensive.

[0003] However, the problem with the prior art is that the cable compartment is mainly installed in the wind turbine tower, and the operating environment of the wind turbine is characterized by large swaying with the waves. In addition, earthquakes occur frequently at sea, and the cable compartment needs to be able to withstand earthquakes of magnitude 9 or above during actual use. In the prior art, the shell frames of the cable compartment and the control cabinet are easily torn by the vibration of the waves, and the welds are easily torn. Summary of the invention

[0004] The object of the present invention is to provide an offshore wind turbine GIS to solve the problem that the shell welds of the cable compartment and the control cabinet in the offshore wind turbine GIS in the prior art are prone to cracking.

[0005] To achieve the above-mentioned purpose, the present invention provides an offshore wind turbine GIS, comprising a circuit breaker and cable compartments arranged on opposite sides of the circuit breaker, a control cabinet is installed above the cable compartment on one side of the circuit breaker, the cable compartment and the control cabinet both include a box body, the box body includes an integrally bent U-shaped main box plate, the opening of the U-shaped main box plate faces the arrangement direction of the circuit breaker and the cable compartment, the box body also includes box wall panels connected to both sides of the U-shaped main box plate, and a reinforcing bracket is arranged above the circuit breaker, with its two ends respectively connected to the cable compartment and the control cabinet on both sides of the circuit breaker.

[0006] Furthermore, the U-shaped main box panel opening of the cable compartment is arranged to face away from the circuit breaker, and a box door is installed at the opening.

[0007] Furthermore, the bottom of the reinforcing bracket is connected to the upper end surface of the circuit breaker.

[0008] Furthermore, the reinforcing bracket includes a connecting base for fixedly connecting to the top of the circuit breaker and a top frame for transversely bridging the cable compartment and the control cabinet, and a reinforcing support is provided between the connecting base and the top frame.

[0009] Furthermore, the reinforcing support includes a vertical support in the middle and oblique supports on both sides of the vertical support.

[0010] Furthermore, reinforcing ribs are provided between two adjacent bent wall panels of the U-shaped main box panel.

[0011] Furthermore, there are two cable compartments on one side of the circuit breaker, which are stacked up and down and fixedly connected, and the control cabinet is connected to the upper cable compartment on the other side of the circuit breaker through the reinforcing bracket.

[0012] Furthermore, the offshore wind turbine GIS also includes a skid-mounted base, and the circuit breaker and the cable compartment are fixedly installed on the skid-mounted base.

[0013] Furthermore, the electrical components in the control cabinet are installed in the control cabinet through a flexible buffer structure.

[0014] Furthermore, a pressure relief channel extending upward is installed on the rear side of the cable compartment.

[0015] Beneficial effects: The present invention provides a pioneering offshore wind turbine GIS, including a circuit breaker and cable compartments arranged on opposite sides of the circuit breaker, a control cabinet installed on the top of the cable compartment on one side, the cable compartment and the control cabinet using the same box body, the box body including an integrally bent U-shaped main box plate, the opening of the U-shaped main box plate facing the arrangement direction of the circuit breaker and the cable compartment, the box body also includes box wall plates connected to both sides of the U-shaped main box plate, and a reinforcing bracket with two ends respectively connected to the cable compartment and the control cabinet on both sides of the circuit breaker is arranged above the circuit breaker. The U-shaped structure of the main box plate strengthens the structural strength of the box body, and by clamping the reinforcing bracket between the cable compartment and the control cabinet on both sides of the circuit breaker, the structure of the box body is strengthened, the cracking of the weld is effectively avoided, the seismic resistance of the offshore wind turbine GIS is strengthened, and the problem of poor seismic resistance of the offshore wind turbine GIS in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall assembly diagram of the offshore wind turbine GIS; Figure 2 This is a top view structural diagram of the offshore wind turbine GIS; Figure 3 This is a schematic diagram of the cable compartment structure of the offshore wind turbine GIS; Figure 4 This is a side view of the cable compartment bulkhead plate of the offshore wind turbine GIS with a pressure relief hole; Figure 5 A front view of one end of the main side plate of the cable compartment of the offshore wind turbine GIS provided with a mounting protrusion; Figure 6 This is a schematic diagram of the structure of the auxiliary bracket of the offshore wind turbine GIS; Figure 7 This is the main view of the auxiliary bracket of the offshore wind turbine GIS; Figure 8 This is a top view of the auxiliary bracket of the offshore wind turbine GIS; Fig. 9 This is a schematic diagram of the structure of the pressure relief channel of the offshore wind turbine GIS.

[0017] In the figure: 1. Circuit breaker; 2. Cable compartment; 3. Control cabinet; 4. Box body; 41. U-shaped main box panel; 42. Box wall panel; 43. Box door; 44. Pressure relief hole; 5. Reinforcement bracket; 51. Connecting base; 52. Top frame; 53. Vertical support; 54. Oblique support; 6. Skid-mounted base; 7. Pressure relief channel; 71. Trough body; 72. Protective cover. DETAILED DESCRIPTION

[0018] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0019] The principle and concept of the present invention is to provide an offshore wind turbine GIS, including a circuit breaker and cable compartments placed opposite to each other on both sides of the circuit breaker, a control cabinet is installed on the top of the cable compartment on one side of the circuit breaker, and the cable compartment and the control cabinet use the same box body, which uses an integrally bent U-shaped main box plate, box wall plates are welded on both sides of the U-shaped main box plate, and a reinforcing bracket bridging the cable compartment and the control cabinet is also connected to the upper end surface of the circuit breaker. The box body structure is strengthened by the reinforcing bracket between the box body with a special structure and the cable compartment and the control cabinet, effectively avoiding the cracking of the weld of the box body caused by the vibration of the wind turbine swaying with the waves, and improving the overall structural strength of the GIS.

[0020] Based on the above principles, in a basic embodiment, as Figure 1-7In the embodiment provided, the offshore wind turbine GIS includes a circuit breaker 1 and a cable compartment 2 installed on opposite sides of the circuit breaker 1, wherein a control cabinet 3 is installed on the top of the cable compartment 2 on one side, and the cable compartment 2 and the control cabinet 3 use a box body 4 of similar design, which includes an integrally bent U-shaped main box plate 41 and box wall plates 42 fixed on both sides of the U-shaped main box plate; the U-shaped main box plate 41 of the box body 4 opens toward the arrangement direction of the circuit breaker 1 and the cable compartment 2, and the cable compartment 2 and the control cabinet 3 facing in this way improve the load resistance of the box body 4 in the lateral direction; a reinforcing bracket 5 is also installed above the circuit breaker 1, and its two ends are respectively connected to the cable compartment 2 and the control cabinet 3 on both sides of the circuit breaker 1. The circuit breaker 1 has docking ports for docking with each cable compartment, so that the conductor in the circuit breaker is connected to the cable. The connection relationship between the circuit breaker and the cable compartment is common knowledge in the field and will not be described in detail herein.

[0021] Based on the above embodiments, in one embodiment, Figure 1 , Figure 2 In the provided embodiment, the box door 43 is installed at the opening of the U-shaped main box plate 41 of the box body 4, and the U-shaped main box plate opening of the cable compartment 2 is arranged with its back facing the circuit breaker 1. In another embodiment, the box door 43 can also be arranged on the box wall plate 42 of the box body 4.

[0022] On the basis of the above embodiments, in one embodiment, the two ends of the reinforcing bracket are respectively connected to the cable compartment 2 and the control cabinet 3, and the reinforcing bracket is placed in the air as a whole. Figure 1 , Figure 2 In the provided embodiment, the bottom of the reinforcing bracket 5 is connected to the upper end surface of the circuit breaker 1. The reinforcing bracket 5 arranged in this way has support in the vertical direction, and the support structure is more stable.

[0023] Based on the above embodiments, in one embodiment, Figure 6-8 In the provided embodiment, the reinforcing bracket 5 includes a connecting base 51 fixedly connected to the top of the circuit breaker 1 and a top frame 52 transversely bridging the cable compartment and the control cabinet, and a reinforcing brace is provided between the connecting base 51 and the top frame 52 to improve the structural strength of the reinforcing bracket 5.

[0024] Based on the above embodiments, in one embodiment, Figure 1-8 In the embodiment provided, the reinforcing brace in the above embodiment includes a vertical brace 53 and an oblique brace 54, which can meet the structural strength requirements and adapt to the assembly structure of the offshore wind turbine GIS. In another embodiment, the truss connecting the control cabinet 3 and the cable compartment 2 on the other side of the circuit breaker 1 can also be used as the reinforcing brace of the reinforcing bracket 5.

[0025] On the basis of the above-mentioned embodiment, in one embodiment, a reinforcing rib plate is welded between two adjacent bent wall plates of the U-shaped main box plate 41 to strengthen the structural strength of the box body 4 .

[0026] Based on the above embodiments, in one embodiment, Figure 1-4 In the provided embodiment, two cable compartments 2 are stacked and fixedly installed one above the other side of the circuit breaker 1, and the reinforcing bracket 5 is installed between the control cabinet 3 on the other side where the two cable compartments 2 are stacked and fixedly installed and the high cable compartment 2 on that side.

[0027] Based on the above embodiments, in one embodiment, Figure 1-9 In the provided embodiment, the offshore wind turbine GIS also includes a skid-mounted base 6, on which the circuit breaker 1 and the cable compartment 2 are fixed. The skid-mounted base 6 can be used to realize modular installation of the circuit breaker 1 and the cable compartment 2, thereby improving the overall structural strength of the offshore GIS.

[0028] On the basis of the above embodiments, in one embodiment, the electrical components inside the control cabinet 3 are fixed in the control cabinet 3 by bolts and nuts. In a more preferred embodiment, the base in the control cabinet 3 for installing the electrical components uses a spring base as a flexible buffer structure for installing the electrical components, which can effectively avoid damage to the electrical components caused by the swing vibration of the offshore wind turbine GIS.

[0029] Based on the above embodiments, in one embodiment, Figure 1-9 In the provided embodiment, a pressure relief channel 7 extending upward is installed on the rear side of the cable compartment 2. The pressure relief channel 7 includes a slot body 71 and a protective cover 72. An air inlet is provided near the bottom of the slot body 71, corresponding to the pressure relief hole 44 provided on the box wall plate 42. A bursting disc is also installed between the pressure relief hole 44 and the air inlet on the slot body 71. When the internal pressure of the cable compartment 2 increases abnormally, the high-temperature and high-pressure arcing gas breaks through the bursting disc and passes through the slot body 71 and pushes open the protective cover 72 to be discharged. In another embodiment, the pressure relief channel 7 can also be provided in the cylinder of the cable compartment 2 and extend to the top of the box body of the cable compartment 2, and the arcing gas is discharged from the top of the cable compartment 2.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An offshore wind turbine GIS, characterized in that: It includes a circuit breaker and cable compartments arranged on opposite sides of the circuit breaker. A control cabinet is installed above the cable compartment on one side of the circuit breaker. The cable compartment and the control cabinet both include a box body. The box body includes an integrally bent U-shaped main box plate. The opening of the U-shaped main box plate faces the arrangement direction of the circuit breaker and the cable compartment. The box body also includes box wall plates connected to both sides of the U-shaped main box plate. A reinforcing bracket is arranged above the circuit breaker, with its two ends respectively connected to the cable compartment and the control cabinet on both sides of the circuit breaker.

2. The offshore wind turbine GIS according to claim 1, characterized in that: The U-shaped main box panel opening of the cable compartment is arranged to face away from the circuit breaker, and a box door is installed at the opening.

3. An offshore wind turbine GIS according to claim 1 or 2, characterized in that: The bottom of the reinforcing bracket is connected to the upper end surface of the circuit breaker.

4. The offshore wind turbine GIS according to claim 3 is characterized in that: The reinforcing bracket includes a connecting base for fixed connection with the top of the circuit breaker and a top frame for transversely bridging the cable compartment and the control cabinet, and a reinforcing support is provided between the connecting base and the top frame.

5. The offshore wind turbine GIS according to claim 4 is characterized in that: The reinforcing support includes a vertical support in the middle and oblique supports on both sides of the vertical support.

6. An offshore wind turbine GIS according to claim 1 or 2, characterized in that: A reinforcing rib is arranged between two adjacent bent wall panels of the U-shaped main box panel.

7. An offshore wind turbine GIS according to claim 1 or 2, characterized in that: There are two cable compartments on one side of the circuit breaker, which are stacked up and down and fixedly connected. The control cabinet is connected to the upper cable compartment on the other side of the circuit breaker through the reinforcing bracket.

8. An offshore wind turbine GIS according to claim 1 or 2, characterized in that: The offshore wind turbine GIS also includes a skid-mounted base, on which the circuit breaker and cable compartment are fixedly installed.

9. An offshore wind turbine GIS according to claim 1 or 2, characterized in that: The electrical components in the control cabinet are installed in the control cabinet through a flexible buffer structure.

10. An offshore wind turbine GIS according to claim 1 or 2, characterized in that: A pressure relief channel extending upward is installed on the rear side of the cable compartment.

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