CN217281849U - High-voltage alternating-current metal-enclosed switchgear - Google Patents
High-voltage alternating-current metal-enclosed switchgear Download PDFInfo
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- CN217281849U CN217281849U CN202220270445.1U CN202220270445U CN217281849U CN 217281849 U CN217281849 U CN 217281849U CN 202220270445 U CN202220270445 U CN 202220270445U CN 217281849 U CN217281849 U CN 217281849U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The utility model relates to a high pressure exchanges metal enclosed switchgear, include: the cabinet body is internally divided into a breaker chamber and a bus chamber; the solid insulation circuit breaker is arranged in the circuit breaker chamber, and the solid insulation bus is arranged in the bus chamber and connected with the output end of the circuit breaker chamber; the bus sleeve is installed on the cabinet body, one end of the bus sleeve is located in the bus chamber, the other end of the bus sleeve is located on the outer surface of the cabinet body, and the solid insulation bus penetrates through the bus sleeve to penetrate out of the cabinet body. Above-mentioned high pressure exchanges metal enclosed switchgear, because solid insulation breaker adopts several groups of switches and relevant electrified part whole to adopt epoxy to pour, so make the switch inside alternate and to the safe insulating distance of ground shorten to 6-8mm from air-insulated 1250mm, so just so greatly reduced solid insulation breaker's volume to reduce high pressure and exchange metal enclosed switchgear's volume. And can be used in places with severe environment, and is particularly suitable for offshore and offshore wind turbine generators.
Description
Technical Field
The utility model relates to an offshore wind power technical field especially relates to a high pressure exchanges metal enclosed switchgear.
Background
With the rapid development of the electric power industry in China, offshore wind turbine generators enter the 10MW era. With the increase of the system capacity of the wind turbine generator, the system voltage is required to be greatly increased in order to reduce the transmission loss. Therefore, the voltage of the transformer for the fan, the switch equipment, the space between the fans and the cable connected with the offshore power transformation platform is also increased from 40.5kV to 72.5 kV.
Due to the limitation of the internal space of the wind power tower, higher requirements are put forward for the miniaturization and maintenance-free of the high-voltage switch equipment. However, the existing alternating current metal-enclosed high-voltage switchgear which is applied more frequently and mainly insulated by air has larger volume, occupies more building area, is sensitive to the quality of ambient air, and is difficult to adapt to the operating conditions of offshore wind turbines.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to provide a high voltage ac metal-enclosed switchgear that improves the above-mentioned drawbacks, in order to solve the problem that the existing ac metal-enclosed high voltage switchgear is difficult to adapt to the operating conditions of offshore wind turbines.
A high voltage ac metal enclosed switchgear comprising:
the cabinet body is internally divided into a breaker chamber and a bus chamber;
a solid insulated circuit breaker mounted in the breaker chamber,
the solid insulation bus is arranged in the bus chamber and is connected with the output end of the solid insulation circuit breaker; and
the bus sleeve is installed on the cabinet body, one end of the bus sleeve is located in the bus chamber, the other end of the bus sleeve is located on the outer surface of the cabinet body, and the solid insulation bus is arranged in the bus sleeve in a penetrating mode.
In one embodiment, the rated voltage of the solid insulated switchgear is.KV.
In one embodiment, the solid insulated circuit breaker is provided with an embedded pole, and the embedded pole comprises an insulating cylinder formed by injection molding of epoxy resin and a vacuum arc-extinguishing chamber arranged in the insulating cylinder.
In one embodiment, the vacuum arc-extinguishing chamber comprises a vacuum tube, and a moving contact, a fixed contact and a grounding electrode which are all positioned in the vacuum tube, wherein the fixed contact and the grounding electrode are mounted on the vacuum tube at intervals along a first direction, and the moving contact is movably arranged between the fixed contact and the grounding electrode along the first direction;
the movable contact can move along the first direction to be in electrical contact with the fixed contact or the grounding electrode.
In one embodiment, the vacuum interrupter further comprises an electric pole and a three-position isolation grounding switch, a sliding hole is formed in the vacuum tube, the electric pole is movably arranged in the sliding hole in a penetrating mode, one end, located in the vacuum tube, of the electric pole is connected with the movable contact, one end, penetrating out of the vacuum tube, of the electric pole is connected with the three-position isolation grounding switch, and the three-position isolation grounding switch is used for driving the electric pole to move along the sliding hole.
In one embodiment, the three-position isolation grounding switch has a closing state, an opening state and a grounding state, and when the three-position isolation grounding switch is in the closing state, the three-position isolation grounding switch drives the moving contact to be in electrical contact with the fixed contact; when the three-station isolation grounding switch is in the opening state, the moving contact is driven to be not in electric contact with the static contact and the grounding electrode; and when the three-station isolation grounding switch is in the grounding state, the moving contact is driven to be in electrical contact with the grounding electrode.
In one embodiment, the cabinet further has a cable chamber for accommodating a cable, and the input end of the solid-insulated circuit breaker is exposed to the cable chamber and connected to the cable.
In one embodiment, the high-voltage alternating-current metal enclosed switchgear further comprises a T-shaped cable head and an arrester, wherein the T-shaped cable head is connected between the cable and the arrester.
In one embodiment, the cabinet body is provided with a pressure relief opening communicated with the cable chamber, and the pressure relief opening is provided with a plurality of pressure relief cover plates.
In one embodiment, the cabinet further has an instrument chamber for placing instrument equipment, and the instrument chamber is located above the breaker chamber in the gravity direction.
Above-mentioned high voltage alternating current metal enclosed switchgear changes traditional circuit breaker with air insulation for solid insulation circuit breaker, can reduce high voltage alternating current metal enclosed switchgear's volume greatly. Specifically, solid insulation circuit breaker adopts array switch and relevant electrified part whole to adopt epoxy to pour, so make the switch inside alternate and to the safe insulating distance of ground shorten to 6-8mm from air-insulated 1250mm, so just greatly reduced solid insulation circuit breaker's volume to reduce high-pressure interchange metal closed switchgear's volume. Furthermore, all the connecting parts of the solid insulation circuit breaker are poured by epoxy resin, so that compared with the traditional air insulation circuit breaker, the strength of the connecting part of the solid insulation circuit breaker is greatly enhanced, the solid insulation circuit breaker can be used in places with severe environments, is particularly suitable for offshore wind turbine generators, and meets the requirements of miniaturization and maintenance-free of the offshore wind turbine generators on high-voltage switch equipment.
Drawings
Fig. 1 is a schematic structural diagram of a high-voltage ac metal-enclosed switchgear according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the high voltage AC metal enclosed switchgear of FIG. 1 from another perspective;
fig. 3 is a schematic structural view of the solid insulated switchgear of fig. 1;
fig. 4 is a sectional view of the solid insulation circuit breaker of fig. 3;
fig. 5 is a schematic structural diagram of the T-shaped cable head in fig. 1.
A cabinet body 10; a breaker chamber 11; a bus bar room 12; an instrument room 13; a cable chamber 14; a pressure relief cover plate 15;
a solid insulated switchgear (20); a solid-sealed polar pole 21; an insulating cylinder 22; a vacuum arc-extinguishing chamber 23; a movable contact 231; a static contact 232; a ground electrode 233; an electric pole 234; a bellows 235; a vacuum tube 236; a three-station mechanism box 24;
a solid insulated bus bar 30; a three-position isolation ground switch 32; a T-shaped cable head 33; cable 34, lightning arrester 35.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1 and 2, an embodiment of the present invention provides a high voltage ac metal-enclosed switchgear, including: the cabinet 10, the solid-insulated circuit breaker 20, the solid-insulated bus bar 30 and the bus bar bushing.
The cabinet 10 is divided into a circuit breaker chamber 11 and a bus chamber 12, the solid insulated circuit breaker 20 is installed in the circuit breaker chamber 11, and the solid insulated bus 30 is installed in the bus chamber 12 and connected to an output terminal of the solid insulated circuit breaker 20. The bus sleeve is installed on the cabinet body 10, one end of the bus sleeve is located in the bus chamber 12, the other end of the bus sleeve is located on the outer surface of the cabinet body 10, and the solid insulated bus 30 penetrates through the bus sleeve to penetrate out of the cabinet body 10.
Above-mentioned high voltage metal enclosed switchgear, with traditional circuit breaker with air insulation change for solid insulation circuit breaker 20, can reduce high voltage metal enclosed switchgear's volume greatly. Specifically, the solid insulated switchgear 20 is formed by pouring a plurality of groups of switches and relevant charged components by using epoxy resin, so that the safe insulation distance between the internal phases of the switches and the ground is shortened from 1250mm of air insulation to 6-8mm, the size of the solid insulated switchgear 20 is greatly reduced, and the size of high-voltage alternating-current metal closed switchgear is reduced. Further, all the connecting parts of the solid insulated circuit breaker 20 are poured by epoxy resin, so that compared with the traditional air insulated circuit breaker, the strength of the connecting part of the solid insulated circuit breaker 20 is greatly enhanced, the solid insulated circuit breaker can be used in places with severe environment, is particularly suitable for offshore wind turbine generators, and meets the requirements of miniaturization and maintenance-free of the offshore wind turbine generators on high-voltage switch equipment.
In the embodiment of the present invention, the rated voltage of the solid-insulated switchgear 20 is 72.5 KV. Therefore, the voltage grade transmitted by the high-voltage alternating-current metal-enclosed switch equipment can also reach 72.5KV, so that the current of the whole system of the high-voltage alternating-current metal-enclosed switch is reduced, the section of the cable 34 is reduced, and the production and construction cost is reduced.
In the embodiment of the present invention, referring to fig. 3 and 4, the solid insulated switchgear 20 has a solid-sealed pole 21, and the solid-sealed pole 21 includes an insulating cylinder 22 formed by injection molding of epoxy resin and a vacuum interrupter 23 disposed in the insulating cylinder 22. By simultaneously embedding the vacuum arc-extinguishing chamber 23 and the related conductive parts in an easily curable solid insulating material such as epoxy resin to form the embedded pole 21, the embedded pole 21 can form an integral component which is not affected by the external environment, can ensure the operation reliability and the personal safety, and is maintenance-free.
In some embodiments, the vacuum interrupter 23 includes a vacuum tube 236, and a movable contact 231, a fixed contact 232, and a ground electrode 233 all located in the vacuum tube 236, wherein the fixed contact 232 and the ground electrode 233 are mounted on the vacuum tube 236 at an interval along a first direction, the movable contact 231 is controllably movable along the first direction, the movable contact 231 is movably disposed between the fixed contact 232 and the ground electrode 233 along the first direction, and the movable contact 231 is capable of moving along the first direction to be in electrical contact with the fixed contact 232 or in electrical contact with the ground electrode 233. Specifically, when the moving contact 231 is in contact with the fixed contact 232, the solid insulated switchgear 20 is in a conducting state; when the movable contact 231 is in contact with the grounding electrode 233, the solid-insulated switchgear 20 is in a grounding state; when the movable contact 231 is not in contact with the fixed contact 232 and the ground electrode 233, the solid insulated switchgear 20 is in an open circuit state.
In the embodiment of fig. 4 in particular, the first direction is an up-down direction.
In the embodiment, vacuum interrupter 23 further includes an electric pole 234 and a bellows 235, electric pole 234 is connected to movable contact 231, vacuum tube 236 has a sliding hole, electric pole 234 is inserted into the sliding hole,
specifically to the embodiment, the vacuum interrupter 23 further includes an electric pole 234 and a three-position isolation grounding switch 32, a sliding hole is opened on the vacuum tube 236, the electric pole 234 movably penetrates through the sliding hole, one end of the electric pole 234 located in the vacuum tube 236 is connected to the movable contact 231, one end of the electric pole 234 penetrating out of the vacuum tube 236 is connected to the three-position isolation grounding switch 32, and the three-position isolation grounding switch 32 is used for driving the electric pole 234 to move along the sliding hole.
Specifically, the three-position isolating and grounding switch 32 has a closing state, an opening state and a grounding state, when the three-position isolating and grounding switch 32 is in the closing state, the moving contact 231 is in contact with the fixed contact 232, and the solid-state isolation circuit breaker 20 is in a conducting state; when the three-station isolation grounding switch 32 is in the open state, the moving contact 231 is not in contact with the fixed contact 232 and the grounding electrode 233, and the solid insulated circuit breaker 20 is in the open state; when the three-position isolation grounding switch 32 is in a grounding state, the movable contact 231 is in contact with the grounding electrode 233, and the solid-insulated switchgear 20 is in a grounding state.
Further, vacuum interrupter 23 still includes bellows 235, and bellows 235 is located on pole 234, and the one end that bellows 235 deviates from moving contact 231 is installed in vacuum tube 236 and sealed the slip hole.
Further, the solid-insulated switchgear 20 further includes a three-position mechanism box 234, and the three-position mechanism box 234 is configured to control the three-position isolation grounding switch 32 to be in a closing state, an opening state, or a grounding state, so as to achieve an effect of adjusting the solid-insulated switchgear 20 through the three-position mechanism box 234.
In the embodiment of the present invention, the cabinet 10 further has a cable chamber 14 for installing the cable 34, and the input end of the solid-insulated switchgear 20 is exposed to the cable chamber 14 and connected to the cable 34. In this way, when the cable 34 needs to be inserted into the solid-insulated switchgear 20, the cable can be directly operated in the cable chamber 14 without entering the switchgear chamber 11, and the sealing performance of the switchgear chamber 11 is ensured.
Further, the cabinet body 10 is provided with a pressure relief opening communicated with the cable chamber 14, and the pressure relief opening is provided with a plurality of pressure relief cover plates 15. Through the pressure relief cover plate 15, high-pressure gas in the cabinet body 10 can be released when the high-voltage alternating-current metal-enclosed switchgear breaks down, so that the accident is prevented from being enlarged.
In the embodiment of the utility model, referring to fig. 5, high pressure exchanges metal enclosed switchgear still includes T type cable head 33, and T type cable head 33 is connected between cable 34 and arrester 35. Specifically, the lightning arrester 35 is a rear plug-in type lightning arrester 35, the lightning arrester 35 connects the cable 34 with the ground through the T-shaped cable head 33, and once abnormal voltage occurs, the lightning arrester 35 acts to guide high-voltage impact current to the ground, thereby playing a role in protecting high-voltage alternating-current metal-enclosed switchgear.
The embodiment of the utility model provides an in, cable 34 has corrosion-resistant protective layer, and this corrosion-resistant protective layer can be used to the protection salt fog corruption, can improve cable 34 to the adaptability of overseas offshore wind farm environment.
The embodiment of the utility model provides an in, cabinet body 10 has still been offered the utensil and has been used for setting up instrument equipment's instrument room 13, and instrument room 13 is located circuit breaker room 11 in the top of direction of gravity. The instrument room 13 is arranged at the high position of the cabinet body 10, so that a user can conveniently observe the index of the instrument equipment.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A high voltage AC metal enclosed switchgear characterized in that it comprises:
a cabinet body (10) which is internally divided into a breaker chamber (11) and a bus chamber (12);
a solid insulated circuit breaker (20) mounted to the breaker chamber (11),
the solid insulation bus (30) is arranged in the bus chamber (12) and is connected with the output end of the solid insulation circuit breaker (20); and
the bus sleeve is installed on the cabinet body (10), one end of the bus sleeve is located in the bus chamber (12), the other end of the bus sleeve is located on the outer surface of the cabinet body (10), and the solid insulation bus (30) penetrates through the bus sleeve.
2. High voltage alternating current metal enclosed switchgear according to claim 1, characterized in that the rated voltage of the solid insulated switchgear (20) is 72.5 KV.
3. A high voltage alternating current metal enclosed switchgear according to claim 1, characterized in that the solid insulated circuit breaker (20) has a solid encapsulated pole (21), the solid encapsulated pole (21) comprising an epoxy injection molded insulating cylinder (22) and a vacuum interrupter (23) arranged inside the insulating cylinder (22).
4. The high-voltage alternating-current metal-enclosed switchgear device according to claim 3, wherein the vacuum interrupter (23) comprises a vacuum tube (236), and a movable contact (231), a fixed contact (232) and a grounding electrode (233) which are all located in the vacuum tube (236), wherein the fixed contact (232) and the grounding electrode (233) are mounted on the vacuum tube (236) at intervals along a first direction, and the movable contact (231) is movably disposed between the fixed contact (232) and the grounding electrode (233) along the first direction;
the movable contact (231) is movable in the first direction into electrical contact with the stationary contact (232) or with the earth electrode (233).
5. The high-voltage alternating-current metal-enclosed switchgear as claimed in claim 4, wherein the vacuum interrupter (23) further comprises an electric pole (234) and a three-position isolated grounding switch (32), the vacuum tube (236) is provided with a sliding hole, the electric pole (234) is movably inserted into the sliding hole, one end of the electric pole (234) located in the vacuum tube (236) is connected to the movable contact (231), one end of the electric pole (234) extending out of the vacuum tube (236) is connected to the three-position isolated grounding switch (32), and the three-position isolated grounding switch (32) is configured to drive the electric pole (234) to move along the sliding hole.
6. High-voltage alternating-current metal-enclosed switchgear according to claim 5,
the three-station isolation grounding switch (32) has a closing state, an opening state and a grounding state, and when the three-station isolation grounding switch (32) is in the closing state, the moving contact (231) is driven to be in electrical contact with the static contact (232); when the three-station isolation grounding switch (32) is in the opening state, the moving contact (231) is driven to be not in electric contact with the static contact (232) and the grounding electrode (233); when the three-position isolation grounding switch (32) is in the grounding state, the moving contact (231) is driven to be in electric contact with the grounding electrode (233).
7. The high-voltage alternating-current metal-enclosed switchgear device according to claim 1, characterized in that said cabinet (10) further has a cable chamber (14) for housing a cable (34), said solid-insulated switchgear device (20) having an input exposed to said cable chamber (14) and connected to said cable (34).
8. The high voltage ac metal enclosed switchgear according to claim 7, further comprising a T-shaped cable head (33) and a surge arrester (35), said T-shaped cable head (33) being connected between said cable (34) and said surge arrester (35).
9. The high-voltage alternating-current metal-enclosed switchgear according to claim 8, wherein the cabinet body (10) is provided with a pressure relief opening communicated with the cable chamber (14), and the pressure relief opening is provided with a plurality of pressure relief cover plates (15).
10. A high voltage alternating current metal enclosed switchgear according to claim 1, characterized in that said cabinet (10) further has an instrument enclosure (13) for the arrangement of instruments, said instrument enclosure (13) being located above said breaker compartment in the direction of gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220270445.1U CN217281849U (en) | 2022-02-10 | 2022-02-10 | High-voltage alternating-current metal-enclosed switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220270445.1U CN217281849U (en) | 2022-02-10 | 2022-02-10 | High-voltage alternating-current metal-enclosed switchgear |
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| CN217281849U true CN217281849U (en) | 2022-08-23 |
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| CN202220270445.1U Active CN217281849U (en) | 2022-02-10 | 2022-02-10 | High-voltage alternating-current metal-enclosed switchgear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024124714A1 (en) * | 2022-12-13 | 2024-06-20 | 广东明阳电气股份有限公司 | Offshore wind power-based 72.5 kv voltage level insulation structure |
-
2022
- 2022-02-10 CN CN202220270445.1U patent/CN217281849U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024124714A1 (en) * | 2022-12-13 | 2024-06-20 | 广东明阳电气股份有限公司 | Offshore wind power-based 72.5 kv voltage level insulation structure |
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