Integrated isolating switch
By designing an integrated disconnector, including a housing, ground cover, assembly parts and a transmission system, the large workload and space occupation of individual ground switches or quick ground switch modules in the prior art are solved, and efficient integrated arrangement in a limited space is achieved.
Patent Information
- Application Number
- CN202420796516.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-04-16
AI Technical Summary
In the prior art, it is necessary to set up a separate ground switch or a quick ground switch module, which is very large in assembly and transportation, making it difficult to meet the integrated layout requirements in limited spaces such as offshore wind power platforms.
An integrated isolating switch is designed, including a housing, a static and dynamic grounding cover, assembled parts, a static contact, a grounding switch and a switch opening and closing resistor. The grounding switch/fast grounding switch is realized through the transmission system, and a grounding contact is provided on the static grounding cover to realize integrated grounding of the three-station structure.
It realizes the integration of the partial closing resistor, grounding switch and fast grounding switch without changing the product floor area and phase spacing, reducing the number of individual modules and assembly workload, facilitating integrated transportation and installation and debugging, and adapting to the layout needs of limited space such as offshore wind power platforms.
Smart Images
Figure CN222838753U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of isolating switches and relates to an integrated isolating switch. Background Art
[0002] As the offshore wind power industry gradually develops from offshore to mid-sea, offshore wind turbines will inevitably develop in the direction of high voltage, large capacity and scale, which puts forward higher requirements on the reliability, integration and economy of switchgear. During the opening and closing operation of the disconnector when the transformer of the offshore wind power platform is put into operation (commissioning and withdrawal), multiple reignitions will occur between the break points, causing VFTO (fast transient overvoltage).
[0003] At present, the main method of limiting overvoltage is to connect the disconnector in parallel with the disconnector resistor. However, the existing disconnector with parallel disconnector resistor can only be combined with a single grounding switch, and a grounding switch or a fast grounding switch module needs to be set up separately, which has the problems of large assembly workload and multiple transportation forms. In addition, the product occupies a large area and is difficult to meet the requirements of integrated layout in limited spaces such as offshore wind power platforms.
[0004] In summary, there is an urgent need to develop an integrated, compact isolating switch that can flexibly combine and install grounding switches and fast grounding switches according to actual project needs. Utility Model Content
[0005] The purpose of the utility model is to solve the technical problems in the prior art that a separate grounding switch or a quick grounding switch module needs to be set up, the assembly and transportation workload is large, and it is difficult to meet the requirements of integrated layout in limited spaces such as offshore wind power platforms, and to provide an integrated isolating switch.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The utility model provides an integrated isolating switch, comprising a shell; a static side grounding cover plate and a dynamic side grounding cover plate are respectively installed at both ends of the shell; a static side assembly component is arranged on one side of the shell close to the static side grounding cover plate, and a dynamic side assembly component is arranged on the other side; a static contact is connected to one end of the static side assembly component; the static contact is connected to a grounding switch through a matching dynamic contact; the grounding switch is connected to a static side operating mechanism; and a grounding contact is arranged on the dynamic side grounding cover plate.
[0008] Furthermore, the static side assembly component is used for current flow and support; the static side assembly component is connected to the static side outlet pot insulator; the static side outlet pot insulator is installed on the side wall of the shell.
[0009] Furthermore, the moving side assembly component is used for current flow and support; the moving side assembly component is connected to the moving side incoming line basin insulator; the moving side incoming line basin insulator is installed on the side wall of the shell.
[0010] Furthermore, a first shielding cover and a second shielding cover are respectively provided at two ends of the static side assembly component; and the second shielding cover is connected to the static contact.
[0011] Furthermore, a switching resistor is provided between the first shielding cover and the second shielding cover.
[0012] Furthermore, a recessed platform is provided on the second shielding cover; the recessed platform is used for assembling the static contact.
[0013] Furthermore, the recessed platform and the assembled static contact are connected by bolts.
[0014] Furthermore, one side of the movable side assembly component is connected to a movable side operating mechanism; the movable side operating mechanism is located outside the housing.
[0015] Furthermore, an insulating torsion bar is connected between the movable side assembly component and the movable side operating mechanism for transmission.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] The utility model discloses an integrated isolating switch, wherein the operating mechanism realizes the opening and closing operations of the grounding switch / quick grounding switch through a transmission system. When closing, the grounding of the inner conductor and the shell is realized through the static contact and the static side grounding cover. If the composite grounding switch / quick grounding switch is not needed, the static contact can be cancelled, and the static side grounding cover is replaced with a closed cover for blocking. The utility model arranges a grounding contact on the moving side grounding cover, and realizes the integration of the grounding switch on the moving side of the isolating switch through a three-station structure. When the grounding contact side is closed, the grounding contact is connected to the moving side grounding cover to realize the grounding of the inner conductor and the shell. The utility model integrates the opening and closing resistor, the grounding switch, and the quick grounding switch in the same shell, with high integration and compact structure, and reduces the number of separate three-way grounding modules and the assembly workload, so as to facilitate integrated transportation, installation and commissioning, and save manpower and material resources; it can realize the layout of the entire station in a limited space such as an offshore wind power platform without changing the original product footprint and phase spacing. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 This is an enlarged schematic diagram of the connection between the second shielding cover and the static contact of the utility model;
[0021] Figure 3 This is the whole bay arrangement with double grounding switches in the embodiment of the utility model;
[0022] Figure 4 This is an embodiment of the utility model with an entire compartment arrangement of a grounding switch and a fast grounding switch.
[0023] Among them: 1-dynamic side incoming line basin insulator; 2-first shielding cover; 3-housing; 4-opening and closing resistor; 5-second shielding cover; 6-earthing switch; 7-static side operating mechanism; 8-static side grounding cover; 9-static contact; 10-static side assembly parts; 11-static side outgoing line basin insulator; 12-dynamic side assembly parts; 13-dynamic side operating mechanism; 14-insulating torsion bar; 15-grounding contact; 16-dynamic side grounding cover; 17-circuit breaker; 18-branch bus; 19-three-way grounding module; 20-grid side disconnector; 21-current transformer; 22-first three-way transfer module; 23-first short branch bus; 24-valve side disconnector; 25-second short branch bus; 26-second three-way transfer module 26; 27-expansion joint; 28-main bus; 29-four-way transfer module. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0027] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0028] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0029] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] The utility model is further described in detail below with reference to the accompanying drawings:
[0031] See also Figure 1 (a) with Figure 1(b), the utility model embodiment discloses an integrated isolating switch, characterized in that it includes a housing 3; the two ends of the housing 3 are respectively installed with a static side grounding cover plate 8 and a dynamic side grounding cover plate 16; a static side assembly component 10 is arranged on one side of the housing 3 close to the static side grounding cover plate 8, and a dynamic side assembly component 12 is arranged on the other side; one end of the static side assembly component 10 is connected with a static contact 9; the static contact 9 is connected to a grounding switch (or a fast grounding switch) 6 through a matching dynamic contact; the grounding switch 6 is connected to a static side operating mechanism 7; a grounding contact 15 is arranged on the dynamic side grounding cover plate 16, and a grounding switch is integrated on the dynamic side of the isolating switch through a three-station structure. When the grounding contact side is closed, the grounding contact 15 is connected to the dynamic side grounding cover plate 16 to realize the grounding of the inner conductor and the housing 3. The static side operating mechanism 7 realizes the opening and closing operations of the grounding switch / fast grounding switch through a transmission system. When the switch is closed, the inner conductor and the housing 3 are grounded through the static contact 9 and the static side grounding cover plate 8. If a composite grounding switch / fast grounding switch is not needed, the static contact 9 can be removed and the static side grounding cover plate 8 can be replaced with a closed cover plate for sealing.
[0032] In a feasible implementation manner of the utility model, the static side assembly component 10 is used for current flow and support; the static side assembly component 10 is connected to a static side outlet pot insulator 11; the static side outlet pot insulator 11 is installed on the side wall of the housing 3.
[0033] In a feasible implementation manner of the utility model, the moving side assembly component 12 is used for current flow and support; the moving side assembly component 12 is connected to the moving side incoming line basin insulator 1; the moving side incoming line basin insulator 1 is installed on the side wall of the housing 3.
[0034] In a feasible implementation of the utility model, the two ends of the static side assembly component 10 are respectively provided with a first shielding cover 2 and a second shielding cover 5; a switching resistor 4 is also provided between the first shielding cover 2 and the second shielding cover 5; and the second shielding cover 5 is connected to the static contact 9. Figure 2 The second shielding cover 5 is provided with a recessed platform, which is used to assemble the static contact 9. The recessed platform is connected to the assembled static contact 9 by bolts.
[0035] In a feasible implementation manner of the present invention, one side of the moving side assembly component 12 is connected to the moving side operating mechanism 13 through an insulating torsion bar 14 for transmission to achieve the three station operations of opening, closing and grounding.
[0036] The integrated isolating switch disclosed in the utility model can integrate the opening and closing resistors, the grounding switch or the fast grounding switch as needed, meeting the flexible and diverse main wiring requirements in actual engineering, reducing the number of modules and the assembly workload, facilitating integrated transportation and installation and commissioning, and saving manpower and material resources.
[0037] Example:
[0038] The utility model embodiment discloses an application mode of an integrated isolating switch in actual engineering layout.
[0039] 1) See Figure 1 The structure shown in (a) is suitable for the application requirements of double grounding switches. The layout in the interval is as follows: Figure 3 As shown, it mainly includes a circuit breaker 17, a branch bus 18, a three-way grounding module 19, a grid-side disconnector 20, a current transformer 21, a first three-way transfer module 22, a first short branch bus 23, a valve-side disconnector 24, a second short branch bus 25, a second three-way transfer module 26, an expansion joint 27, a main bus 28, and a four-way transfer module 29. The grid-side disconnector 20 is a conventional disconnector, which can be a composite grounding switch or a fast grounding switch. No opening and closing resistors are installed inside. It is arranged horizontally. The dynamic side is connected to the current transformer 21, and the static side is connected to the inlet and outlet bushings through the three-way grounding module 19 and the branch bus 18. The valve-side isolating switch 24 is an integrated isolating switch proposed in the utility model, which is arranged vertically. The dynamic side incoming line basin insulator 1 is connected to the current transformer 21 through the first short branch bus 23 and the first three-way adapter module 22, and the static side outgoing line basin insulator 11 is connected to the expansion joint 27 through the second short branch bus 25 and the second three-way adapter module 26, so as to meet the incoming and outgoing line requirements of the main bus 28.
[0040] This embodiment realizes the whole station layout without changing the product's external dimensions and phase spacing, which not only meets the demand for isolating switches to suppress VFTO in the field of offshore wind power flexible direct current transmission, but also meets the requirements for product integrated layout in limited spaces such as offshore wind power platforms.
[0041] 2) See Figure 1 The structure shown in (b) is suitable for scenarios that include both grounding switches and fast grounding switches. The layout within the interval is as follows: Figure 4 The isolating switch in this embodiment is also arranged vertically, which effectively avoids the discharge risk caused by foreign objects generated during mechanical operation falling on the horizontally placed pot-type insulator, thereby improving the operating reliability of the equipment.
[0042] The valve-side isolating switch 24 described in this embodiment can integrate the opening and closing resistors, the grounding switch, and the fast grounding switch in the same housing, with high integration and compact structure, reducing the number of separate three-way grounding modules 19 and the assembly workload, facilitating integrated transportation and installation and commissioning, and saving manpower and material resources; and is particularly suitable for ultra-high voltage and large-capacity converter station scenarios that need to suppress VFTO. A vertical arrangement is adopted in the station, which can effectively avoid the discharge risk caused by foreign objects falling onto the horizontally placed pot-type insulators, while not changing the product footprint and phase spacing, and can adapt to the layout requirements in limited spaces such as offshore wind power platforms.
[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An integrated isolating switch, characterized in that: The invention comprises a shell (3); a static side grounding cover plate (8) and a dynamic side grounding cover plate (16) are respectively installed at two ends of the shell (3); a static side assembly component (10) is arranged on one side of the shell (3) close to the static side grounding cover plate (8), and a dynamic side assembly component (12) is arranged on the other side; a static contact (9) is connected to one end of the static side assembly component (10); the static contact (9) is connected to a grounding switch (6) through a matching dynamic contact; the grounding switch (6) is connected to a static side operating mechanism (7); and a grounding contact (15) is arranged on the dynamic side grounding cover plate (16).
2. The integrated isolating switch according to claim 1, characterized in that: The static side assembly component (10) is used for current flow and support; the static side assembly component (10) is connected to a static side outlet basin insulator (11); the static side outlet basin insulator (11) is installed on the side wall of the housing (3).
3. The integrated isolating switch according to claim 2, characterized in that: The moving side assembly component (12) is used for current flow and support; the moving side assembly component (12) is connected to a moving side incoming line basin insulator (1); the moving side incoming line basin insulator (1) is installed on the side wall of the housing (3).
4. An integrated isolating switch according to claim 2 or 3, characterized in that: A first shielding cover (2) and a second shielding cover (5) are respectively provided at both ends of the static side assembly component (10); the second shielding cover (5) is connected to the static contact (9).
5. The integrated isolating switch according to claim 4, characterized in that: A switching resistor (4) is also provided between the first shielding cover (2) and the second shielding cover (5).
6. The integrated isolating switch according to claim 5, characterized in that: The second shielding cover (5) is provided with a recessed platform; the recessed platform is used for assembling the stationary contact (9).
7. The integrated isolating switch according to claim 6, characterized in that: The recessed platform is connected to the assembled static contact (9) via bolts.
8. The integrated isolating switch according to claim 7, characterized in that: One side of the movable side assembly component (12) is connected to a movable side operating mechanism (13); the movable side operating mechanism (13) is located outside the housing (3).
9. The integrated isolating switch according to claim 8, characterized in that: An insulating torsion bar (14) is connected between the movable side assembly component (12) and the movable side operating mechanism (13) for transmission.