A gas enclosed switchgear system

Abstract

The application relates to a gas-enclosed switch device system, which comprises a mounting base plate, a total isolation grounding switch module mounted on the mounting base plate, an incoming line isolation grounding switch module mounted on a first connecting hole and electrically connected with the total isolation grounding switch module, and an outgoing line isolation grounding switch module mounted on a second connecting hole and electrically connected with the total isolation grounding switch module. The total isolation grounding switch module is provided with the first connecting hole and the second connecting hole which are arranged in the same direction and are spaced from top to bottom. The incoming line isolation grounding switch module has an incoming line interface which is different from the direction of the first connecting hole. The outgoing line isolation grounding switch module has an outgoing line interface which is different from the direction of the second connecting hole. Compared with a traditional longitudinal arrangement scheme, the device is miniaturized, the problem of the too large longitudinal size of an offshore wind power layout is solved, intensive and modular design is realized, and the special requirements of the offshore wind power layout on the gas-insulated switch device are met.

Description

Technical Field

[0001] This utility model relates to the field of high voltage switchgear technology, and in particular to a gas-sealed switchgear system. Background Technology

[0002] High-voltage switchgear is a crucial piece of equipment for ensuring the safe operation of power systems. Its function is to interrupt normal load current and short-circuit fault current in circuits. When some equipment within the system needs to be put into operation or under maintenance, the switching operations of the high-voltage switchgear within the system are used to achieve power distribution and transmission or equipment isolation.

[0003] The basic requirements for the design of high-voltage switchgear are: 1. Equipment safety and personal safety; 2. Power supply reliability requirements for primary and secondary loads. The conventional layout of existing high-voltage switchgear is linearly arranged along the cable extension direction, resulting in a large longitudinal dimension. While this is not particularly difficult to install on land, it is problematic for offshore wind power layouts. The limited installation space, often consisting of tower structures, hinders the placement of large-sized equipment. Furthermore, the limited working space and harsh environment during offshore hoisting operations significantly increase the difficulty of installation. The large size of existing high-voltage switchgear undoubtedly increases the cost of hoisting operations. Utility Model Content

[0004] Given that existing high-voltage switchgear is too large to be suitable for installation in offshore wind power layouts, it is necessary to provide a gas-sealed switchgear system.

[0005] This application provides a gas-sealed switchgear system, comprising:

[0006] Install base plate;

[0007] The main isolating grounding switch module is installed on the mounting base plate. The main isolating grounding switch module has first and second docking holes with the same orientation and arranged at intervals from top to bottom on its periphery.

[0008] An incoming line isolating grounding switch module is installed in the first mating hole and electrically connected to the main isolating grounding switch module, and has an incoming line interface with an orientation different from that of the first mating hole; and

[0009] The outgoing line isolating grounding switch module is installed in the second docking hole and electrically connected to the main isolating grounding switch module, and has an outgoing line interface facing a different direction than the second docking hole.

[0010] In one embodiment, the main isolating grounding switch module includes a first housing providing a first mating hole and a second mating hole, a first isolating grounding switch body installed in the first housing, and a circuit breaker device electrically connected to the first isolating grounding switch body;

[0011] The first isolating grounding switch body is electrically connected to the incoming isolating grounding switch module, and the circuit breaker device is also electrically connected to the outgoing isolating grounding switch module.

[0012] In one embodiment, the incoming line isolation grounding switch module includes a second housing, a second isolation grounding switch body installed inside the second housing, and a second socket fixedly connected to the second housing and providing an incoming line interface;

[0013] The second isolating grounding switch body is electrically connected to the circuit breaker device.

[0014] In one embodiment, the end of the first housing away from the mounting base plate is also provided with a third docking hole facing away from the mounting base plate, and the main isolation grounding switch module also includes a first operating mechanism installed at the third docking hole, the first operating mechanism being driven and connected to the body of the first isolation grounding switch.

[0015] In one embodiment, the first operating mechanism extends from the third mating hole along the orientation of the first mating hole and the second mating hole to be vertically stacked with the incoming line isolation grounding switch module and the outgoing line isolation grounding switch module.

[0016] In one embodiment, a fourth mating hole with a different orientation from the first mating hole and the second mating hole is also provided on the periphery of the first housing;

[0017] The circuit breaker device includes a cabinet mounted on a mounting base plate, a second operating mechanism mounted in the cabinet, and a circuit breaker body mounted at a fourth docking hole. The two electrical terminals of the circuit breaker body are electrically connected to the circuit breaker bodies of the incoming line isolating grounding switch module and the outgoing line isolating grounding switch module, respectively. The second operating mechanism is driven and connected to the circuit breaker body.

[0018] In one embodiment, the orientation of the fourth mating hole is perpendicular to the orientation of the first mating hole and the second mating hole.

[0019] In one embodiment, the circuit breaker body is filled with insulating gas, and the pressure of the insulating gas is 0.58 MPa.

[0020] In one embodiment, the outgoing line isolation grounding switch module includes at least two outgoing devices arranged sequentially along the orientation of the second docking hole, at least one outgoing device for docking with an outgoing line, and the remaining outgoing devices for docking with a collector line.

[0021] In one embodiment, the outgoing device includes a third housing, a third isolating grounding switch body installed in the third housing, and a third socket fixedly connected to the third housing and providing an outgoing interface;

[0022] The third isolating grounding switch body is electrically connected to the main isolating grounding switch module.

[0023] In summary, this application achieves a prefabricated, compact overall solution by vertically stacking the incoming and outgoing isolating ground switch modules and extending the main isolating ground switch module vertically, and then connecting the three main modules through multiple mating holes on the main isolating ground switch module. Compared with the traditional gas-insulated switchgear (GIS) layout scheme, this solution achieves equipment miniaturization, solves the problem of excessively large longitudinal dimensions in offshore wind farms, and provides a compact and modular design, meeting the special requirements of the specific operating environment of offshore wind farms for gas-insulated switchgear (GIS). Attached Figure Description

[0024] Figure 1 A front view of a gas-sealed switchgear system according to an embodiment of this application;

[0025] Figure 2 for Figure 1 Side view of the gas-sealed switchgear system shown;

[0026] Figure 3 for Figure 1 A plan view of the gas-sealed switchgear system shown.

[0027] Figure 4 for Figure 1 The circuit diagram of the gas-sealed switchgear system is shown below.

[0028] Figure 5 A front view of a gas-sealed switchgear system provided in another embodiment of this application;

[0029] Figure 6 for Figure 5 Side view of the gas-sealed switchgear system shown;

[0030] Figure 7 for Figure 5 A plan view of the gas-sealed switchgear system shown.

[0031] Figure 8 for Figure 5 The circuit diagram shown is of a gas-sealed switchgear system.

[0032] Figure label:

[0033] 10. Mounting base plate; 20. Main isolating grounding switch module; 201. First mating hole; 202. Second mating hole; 203. Third mating hole; 21. First housing; 22. Circuit breaker device; 221. Cabinet; 23. First operating mechanism; 30. Incoming line isolating grounding switch module; 301. Incoming line interface; 31. Second housing; 32. Second socket; 40. Outgoing line isolating grounding switch module; 401. Outgoing line interface; 41. Outgoing line device; 411. Third housing; 412. Third socket; 50. Elbow cable in / outgoing line module. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] High-voltage switchgear is a crucial piece of equipment for ensuring the safe operation of power systems. Its function is to interrupt normal load current and short-circuit fault current in circuits. When some equipment within the system needs to be put into operation or under maintenance, the switching operations of the high-voltage switchgear within the system are used to achieve power distribution and transmission or equipment isolation.

[0041] The basic requirements for the design of high-voltage switchgear are: 1. Equipment safety and personal safety; 2. Power supply reliability requirements for primary and secondary loads. The conventional layout of existing high-voltage switchgear is linearly arranged along the cable extension direction, resulting in a large longitudinal dimension. While this is not particularly difficult to install on land, it is problematic for offshore wind power layouts. The limited installation space, often consisting of tower structures, hinders the placement of large-sized equipment. Furthermore, the limited working space and harsh environment during offshore hoisting operations significantly increase the difficulty of installation. The large size of existing high-voltage switchgear undoubtedly increases the cost of hoisting operations.

[0042] Therefore, it is necessary to provide a gas-sealed switchgear system that is compact and occupies little space.

[0043] Please see Figure 1 The gas-sealed switchgear system provided in this application includes a mounting base plate 10, a main isolating grounding switch module 20, an incoming line isolating grounding switch module 30, and an outgoing line isolating grounding switch module 40. The main isolating grounding switch module 20 is mounted on the mounting base plate 10 and extends upward from the mounting base plate 10. The main isolating grounding switch module 20 has a first mating hole 201 and a second mating hole 202 arranged at intervals from top to bottom with the same orientation on its periphery. The incoming line isolating grounding switch module 30 is mounted in the first mating hole 201 and is electrically connected to the main isolating grounding switch module 20. The outgoing line isolating grounding switch module 40 is mounted in the second mating hole 202 and is electrically connected to the main isolating grounding switch module 20. The incoming line isolating grounding switch module 30 has an outgoing interface 401 with an orientation different from that of the second mating hole 202. The outgoing line isolating grounding switch module 40 also has an outgoing interface 401 with an orientation different from that of the first mating hole 201. By stacking the incoming isolation grounding switch module 30 and the outgoing isolation grounding switch vertically, while extending the main isolation grounding switch module 20 vertically, this horizontal and vertical combination layout reduces the volume occupied by the gas-sealed switchgear system. The two docking holes face the same direction, as do the incoming interface 301 and the outgoing interface 401, which facilitates wiring and connection. The modules are neatly arranged, making it easier to troubleshoot installation problems.

[0044] like Figures 2 to 4As shown, the main isolating grounding switch module 20 includes a first housing 21, a first isolating grounding switch body installed inside the first housing 21, and a circuit breaker device 22 electrically connected to the first isolating grounding switch body. The incoming isolating grounding switch module 30, the first isolating grounding switch body, the circuit breaker device 22, and the outgoing isolating grounding switch module 40 are connected in series. The end of the first housing 21 away from the mounting base plate 10 is also provided with a third docking hole 203 facing away from the mounting base plate 10. The main isolating grounding switch module 20 also includes a first operating mechanism 23 installed at the third docking hole 203. The first operating mechanism 23 is driven and connected to the first isolating grounding switch body. That is, the first operating mechanism 23 is located at the top and is in a prominent position, which facilitates the operator to isolate the circuit to be repaired in time during maintenance and ensures the circuit safety during the maintenance process. The first operating mechanism 23 extends from the third docking hole 203 along the orientation of the first docking hole 201 and the second docking hole 202 to be vertically stacked with the incoming isolation grounding switch module 30 and the outgoing isolation grounding switch module 40, thereby further improving the compactness of the gas-sealed switchgear system layout. The circuit breaker device 22 includes a cabinet 221 mounted on the mounting base plate 10, a second operating mechanism mounted in the cabinet 221, and a circuit breaker body mounted at the fourth docking hole. The two terminals of the circuit breaker body are electrically connected to the circuit breaker bodies of the incoming isolation grounding switch module 30 and the outgoing isolation grounding switch module 40, respectively. The second operating mechanism is driven and connected to the circuit breaker body.

[0045] like Figures 2 to 4 As shown, the incoming line isolating grounding switch module 30 includes a second housing 31, a second isolating grounding switch body installed inside the second housing 31, and a second socket 32 ​​fixedly connected to the second housing 31 and providing an incoming line interface 301. The second isolating grounding switch body is electrically connected to the circuit breaker device 22. The incoming line isolating grounding switch module 30 has the ability to transmit rated current and has the function of delivering wind turbine power to the system.

[0046] like Figures 2 to 4As shown, the outgoing line isolating grounding switch module 40 includes at least two outgoing line devices 41 arranged sequentially along the orientation of the second docking hole 202. At least one outgoing line device 41 is used to dock with an outgoing line, and the remaining outgoing line devices 41 are used to dock with a collector line. Specifically, the outgoing line device 41 includes a third housing 411, a second isolating grounding switch body installed within the third housing 411, and a third socket 412 fixedly connected to the third housing 411 and providing an outgoing line interface 401. The third isolating grounding switch body is electrically connected to the circuit breaker device 22. The outgoing line device 41 for docking with the outgoing line has the capability to transmit rated current and has the function of transmitting electrical energy in the system to the next system. The outgoing line device 41 for docking with the collector line has the capability to transmit rated current and has the function of collecting electrical energy from nearby wind turbines through cables in the system.

[0047] Optional, such as Figure 2 and Figure 6 As shown, in order to maintain a safe distance between cables, in one embodiment provided in this application, the gas-sealed switchgear uses an elbow-type cable inlet / outlet module 50 to connect to the second socket 32 ​​or the third socket 412.

[0048] Optional, such as Figure 2 As shown, in order to ensure the structural strength of the entire gas-sealed switchgear system, in the embodiment provided in this application, a first reinforcing bracket 61 is provided between the incoming line isolating grounding switch module 30 and the outgoing line isolating grounding switch module 40, and a second reinforcing bracket 62 is provided between the outgoing line isolating grounding switch module 40 and the mounting base plate. By adding two reinforcing brackets to provide vertical auxiliary support for the outgoing line isolating grounding switch module 40 and the incoming line isolating grounding switch module 30, the problem of reduced air tightness caused by the large shear force on the connecting flange between the incoming line isolating grounding switch module 30 and the main isolating grounding switch module 20 is avoided. The same applies to the connection between the outgoing line isolating grounding switch module 40 and the main isolating grounding switch module 20.

[0049] For ease of description, the orientation of the first mating hole 201 and the second mating hole 202 is horizontal, the orientation of the inlet interface 301, the outlet interface 401 and the fourth mating hole (not shown) is vertical, the direction perpendicular to and away from the mounting base plate 10 is vertical, and the orientation of the third mating hole 203 is vertical.

[0050] Optionally, in the embodiments provided in this application, the first housing 21 extends vertically, the second housing 31 and the third housing 411 are distributed vertically in layers, multiple outgoing devices 41 are arranged horizontally, the second socket 32 ​​is arranged vertically with the second housing 31, the third socket 412 is arranged vertically with the third housing 411, and the cabinet 221 is arranged vertically with the first housing 21. Through such horizontal and vertical arrangement, multiple components of the gas-sealed switchgear are integrated onto the mounting base plate 10, resulting in a compact layout.

[0051] like Figure 1 As shown, the inlet interface 301 and the two outlet interfaces 401 are neatly arranged, facilitating wiring; as Figure 2 As shown, the three modules are of roughly the same length along the longitudinal direction, and the vertical hierarchy is clearly defined; as Figure 3 As shown, after all components are installed, they do not exceed the structure of the mounting base plate 10. All of the above indicate that the gas-sealed switchgear system provided in this application has achieved miniaturization and can meet the compact layout requirements of offshore wind power.

[0052] Please see Figures 5 to 8 In this embodiment, the structure of the gas-sealed switchgear system includes two collector lines, one outgoing line and one incoming line. That is, the outgoing isolation grounding switch module 40 in the gas-sealed switchgear system includes three outgoing devices 41 arranged laterally. This application uses this arrangement to strictly separate the incoming line and outgoing line by layer to avoid the problem of incorrect connection or missing connection.

[0053] Optionally, the circuit breaker body is filled with an insulating gas at a pressure of 0.58 MPa. This insulating gas can be, but is not limited to, SF6 gas, N2 gas, air, or a mixture of the aforementioned gases. It is understood that the first housing 21, the second housing 31, and the third housing 411 are also filled with the aforementioned insulating gas.

[0054] Optionally, the first housing 21, the second housing 31 and the third housing 411 are all four-way housings, and the unused interfaces are sealed with insulating basins.

[0055] The above Figure 4 and Figure 8 The markings in the diagram have the following meanings: CSE indicates cable termination connection; ESDS, isolating grounding switch; VD, live indicator; CB, circuit breaker.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas-sealed switchgear system, characterized in that, include: Install base plate (10); The main isolating grounding switch module (20) is installed on the mounting base plate (10). The main isolating grounding switch module (20) has a first docking hole (201) and a second docking hole (202) with the same orientation and arranged at intervals from top to bottom on its periphery. An incoming line isolation grounding switch module (30) is installed in the first docking hole (201) and electrically connected to the main isolation grounding switch module (20), and has an incoming line interface (301) with an orientation different from that of the first docking hole (201); and Outgoing line isolation grounding switch module (40) is installed in the second docking hole (202) and electrically connected to the main isolation grounding switch module (20), and has an outgoing line interface (401) facing a different direction from the second docking hole (202).

2. The gas-sealed switchgear system according to claim 1, characterized in that, The main isolation grounding switch module (20) includes a first housing (21) providing the first docking hole (201) and the second docking hole (202), a first isolation grounding switch body installed in the first housing (21), and a circuit breaker device (22) electrically connected to the first isolation grounding switch body. The first isolating grounding switch body is electrically connected to the incoming isolating grounding switch module (30), and the circuit breaker device (22) is also electrically connected to the outgoing isolating grounding switch module (40).

3. The gas-sealed switchgear system according to claim 2, characterized in that, The incoming line isolation grounding switch module (30) includes a second housing (31), a second isolation grounding switch body installed in the second housing (31), and a second socket (32) fixedly connected to the second housing (31) and providing the incoming line interface (301). The second isolating grounding switch body is electrically connected to the circuit breaker device (22).

4. The gas-sealed switchgear system according to claim 2 or 3, characterized in that, The first housing (21) is provided with a third docking hole (203) facing away from the mounting base plate (10) at one end. The main isolation grounding switch module (20) also includes a first operating mechanism (23) installed in the third docking hole (203). The first operating mechanism (23) is driven and connected to the first isolation grounding switch body.

5. The gas-sealed switchgear system according to claim 4, characterized in that, The first operating mechanism (23) extends from the third docking hole (203) along the orientation of the first docking hole (201) and the second docking hole (202) to be vertically stacked with the incoming line isolation grounding switch module (30) and the outgoing line isolation grounding switch module (40).

6. The gas-sealed switchgear system according to claim 2 or 3, characterized in that, The periphery of the first outer shell (21) is also provided with a fourth docking hole, which has a different orientation from the first docking hole (201) and the second docking hole (202); The circuit breaker device (22) includes a cabinet (221) mounted on the mounting base plate (10), a second operating mechanism mounted in the cabinet (221), and a circuit breaker body mounted at the fourth docking hole. The two electrical terminals of the circuit breaker body are electrically connected to the circuit breaker bodies of the incoming isolation grounding switch module (30) and the outgoing isolation grounding switch module (40), respectively. The second operating mechanism is driven and connected to the circuit breaker body.

7. The gas-sealed switchgear system according to claim 6, characterized in that, The orientation of the fourth mating hole is perpendicular to the orientations of the first mating hole (201) and the second mating hole (202).

8. The gas-sealed switchgear system according to claim 6, characterized in that, The circuit breaker body is filled with insulating gas, and the pressure of the insulating gas is 0.58 MPa.

9. The gas-sealed switchgear system according to claim 1, characterized in that, The outgoing isolation grounding switch module (40) includes at least two outgoing devices (41) arranged sequentially along the orientation of the second docking hole (202), at least one of the outgoing devices (41) is used to dock the outgoing line, and the remaining outgoing devices (41) are used to dock the collector line.

10. The gas-sealed switchgear system according to claim 9, characterized in that, The outgoing device (41) includes a third housing (411), a third isolation grounding switch body installed in the third housing (411), and a third socket (412) fixedly connected to the third housing (411) and providing the outgoing interface (401). The third isolating grounding switch body is electrically connected to the main isolating grounding switch module (20).

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