CN111048351A - Novel transmission and transformation station device - Google Patents

Novel transmission and transformation station device Download PDF

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Publication number
CN111048351A
CN111048351A CN202010045585.4A CN202010045585A CN111048351A CN 111048351 A CN111048351 A CN 111048351A CN 202010045585 A CN202010045585 A CN 202010045585A CN 111048351 A CN111048351 A CN 111048351A
Authority
CN
China
Prior art keywords
transformer
vacuum arc
chamber
extinguishing chamber
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010045585.4A
Other languages
Chinese (zh)
Inventor
梁宏
唐超
徐贤忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Jinrui Switch Electric Co Ltd
Original Assignee
Anhui Jinrui Switch Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Jinrui Switch Electric Co Ltd filed Critical Anhui Jinrui Switch Electric Co Ltd
Priority to CN202010045585.4A priority Critical patent/CN111048351A/en
Publication of CN111048351A publication Critical patent/CN111048351A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B7/00—Enclosed substations, e.g. compact substations
    • H02B7/06—Distribution substations, e.g. for urban network
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • H01H2033/66223—Details relating to the sealing of vacuum switch housings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

The invention discloses a novel power transmission and transformation station device, which belongs to the technical field of power transmission and transformation settings and comprises a low-voltage cabinet and a transformer, wherein the low-voltage cabinet is hung on one side of the transformer, the transformer is connected with a transformer sleeve, a vacuum arc-extinguishing chamber is arranged in the transformer sleeve, and a first insulating gel layer for fixing the vacuum arc-extinguishing chamber and isolating the vacuum arc-extinguishing chamber from transformer oil is filled between the vacuum arc-extinguishing chamber and the transformer sleeve; the lower end of the vacuum arc extinguish chamber is directly connected with the transformer, and the pull rod at the upper end of the vacuum arc extinguish chamber is connected with an operating mechanism for controlling the opening/closing action of the vacuum arc extinguish chamber. The vacuum arc-extinguishing chamber is arranged in the transformer bushing, the vacuum arc-extinguishing chamber can be opened/closed frequently for ten thousand times, and the problems that an oil load switch of the device in an oil tank of the traditional American box transformer cannot be operated frequently, a tubular fuse needs to be replaced after short-circuit current is passed once, and the tubular fuse is difficult to be opened and closed by small current are solved.

Description

Novel transmission and transformation station device
Technical Field
The invention belongs to the technical field of power transmission and transformation settings, and particularly relates to a novel power transmission and transformation station device.
Background
The common power transmission and transformation station devices comprise an European box transformer substation and an American box transformer substation, wherein a low-voltage cabinet, a transformer and a high-voltage cabinet are combined in mutually isolated boxes, and the boxes are large in size and large in occupied area.
The American box transformer is characterized in that a low-voltage cabinet is hung on one side of a transformer, an oil type load switch and a tubular fuse are installed in an oil tank of the transformer, line faults are protected, load dispatching is switched, and high-voltage cables directly lead out, so that the size of the American box transformer is greatly reduced compared with that of an European box transformer, the occupied area is reduced by about 30%, and the American box transformer is mostly used in photovoltaic power generation and wind power generation equipment in China. However, the oil load switch of the oil tank device of the American-style tank transformer cannot be frequently operated, the small current is difficult to cut off, the oil quality of the transformer is deteriorated when the transformer is cut off, the insulation level is reduced, the potential danger of explosion and ignition exists, and the tubular fuse in the oil tank needs to be replaced after short-circuit current is passed once, so that the replacement is difficult.
Disclosure of Invention
The invention aims to provide a novel transmission and transformation station device, which solves the problems that an oil load switch arranged in an oil tank of an American box-type transformer cannot be frequently operated, small current is difficult to cut off, the oil quality of a transformer is deteriorated when the transformer is cut off, the insulation level is reduced, more hidden dangers of explosion and ignition exist, and a tubular fuse in the oil tank needs to be replaced after short-circuit current every time, so that the replacement is difficult.
In order to achieve the purpose, the invention adopts the following technical scheme: a novel power transmission and transformation station device comprises a low-voltage cabinet and a transformer, wherein the low-voltage cabinet is hung on one side of the transformer, a transformer sleeve is connected onto the transformer, a vacuum arc-extinguishing chamber is arranged in the transformer sleeve, and a first insulating gel layer used for fixing the vacuum arc-extinguishing chamber and isolating the vacuum arc-extinguishing chamber from transformer oil is filled between the vacuum arc-extinguishing chamber and the transformer sleeve; the lower end of the vacuum arc extinguish chamber is directly connected with the transformer, and the pull rod at the upper end of the vacuum arc extinguish chamber is connected with an operating mechanism for controlling the opening/closing action of the vacuum arc extinguish chamber.
Preferably, vacuum interrupter sets up in the explosion chamber sleeve, and the explosion chamber sleeve pipe setting of installing vacuum interrupter is intraductal at the transformer sleeve, fills the second insulating gel layer that is used for fixed explosion chamber sleeve pipe and keeps apart vacuum interrupter and transformer oil between explosion chamber sleeve pipe and the transformer sleeve pipe.
Preferably, an electric field voltage-sharing device is arranged at the direct connection position of the vacuum arc-extinguishing chamber and the transformer.
Preferably, the lower end of the transformer bushing is provided with an electronic voltage/current transformer.
Preferably, the operating mechanism is a permanent magnet operating mechanism or a spring operating mechanism.
Preferably, the arc extinguish chamber sleeve is a capacitor sleeve wound by epoxy glass cloth or an epoxy resin sleeve cast by epoxy resin.
Compared with the prior art, the invention has the beneficial effects that:
1. the vacuum arc-extinguishing chamber is arranged in the transformer bushing, the short-circuit fault protection and load distribution transfer of the power transmission and distribution line are realized by the dividing/closing operation of the vacuum arc-extinguishing chamber by the operating mechanism, the vacuum arc-extinguishing chamber can be opened/closed frequently for ten thousand times, and the American box is changed for about 10 times, so that the problems that an oil load switch of the oil tank device of the traditional American box transformer cannot be operated frequently, a tubular fuse needs to be replaced after short-circuit current every time, and the small current is difficult to cut off are solved. In addition, the vacuum arc-extinguishing chamber is sealed in the insulating sleeve, is filled with insulating gel and is isolated from transformer oil, so that the opening/closing of the vacuum arc-extinguishing chamber does not influence the oil quality, and the vacuum arc-extinguishing chamber sleeve are sealed in the transformer sleeve as a whole, so that the vacuum arc-extinguishing chamber has the advantages of moisture resistance, fire resistance and explosion resistance, and the safety of a power system is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is an enlarged view of part A of FIG. 2;
FIG. 4 is a schematic structural diagram of an electric field voltage equalizing mechanism according to a second embodiment;
FIG. 5 is a schematic structural diagram of a third embodiment of the present invention;
in the figure: the low-voltage cabinet 100, the transformer 200, the transformer bushing 300, the vacuum arc-extinguishing chamber 400, the first insulating gel layer 500, the electronic voltage/current transformer 600, the permanent magnet operating mechanism 700, the controller 800, the guide rod 900, the spring operating mechanism 1000, the operating rod 1001, the crank arm 1002, the electric field voltage-sharing device 1100, the high-voltage conductor 1101, the zero screen 1102, the shielding layer 1103, the voltage dividing screen 1104 and the insulating cylinder 1105.
Detailed Description
In order that those skilled in the art will better understand the present invention, the invention will now be further described with reference to the following specific embodiments:
as shown in fig. 1, a novel power transmission and transformation station device comprises a low voltage cabinet 100 and a transformer 200, wherein the low voltage cabinet 100 is hung on one side of the transformer 200, the transformer 200 is connected with a transformer bushing 300, a vacuum arc-extinguishing chamber 400 is arranged in the transformer bushing 300, and a first insulating gel layer 500 for fixing the vacuum arc-extinguishing chamber 400 and isolating the vacuum arc-extinguishing chamber 400 from transformer oil is filled between the vacuum arc-extinguishing chamber 400 and the transformer bushing 300; the lower end of the vacuum arc extinguish chamber 400 is directly connected with the transformer 200, the lower end of the transformer bushing 300 is provided with the electronic voltage/current transformer 600, the pull rod at the upper end of the vacuum arc extinguish chamber 400 is connected with an operating mechanism for controlling the opening/closing action of the vacuum arc extinguish chamber 400, the operating mechanism is a permanent magnet operating mechanism or a spring operating mechanism, the operating mechanism in the embodiment is a permanent magnet operating mechanism 700 arranged at the top of the transformer bushing 300, the transformer 200 is provided with a controller 800 for controlling the permanent magnet operating mechanism, and the permanent magnet operating mechanism 700 is in the conventional design. The transformer bushing 300 is provided with a guide 900 for connecting a high voltage line, which can be directly connected to an overhead transmission line.
Example two
The second embodiment is basically the same as the first embodiment in technical solution, and the difference is that: as shown in fig. 2-4, an electric field voltage-sharing device 1100 is disposed at a direct connection between the vacuum interrupter 400 and the transformer 200, the electric field voltage-sharing device 1100 includes an insulating cylinder 1105, a high-voltage conductor 1101, a zero screen 1102, a shielding layer 1103 and a plurality of partial pressure screens 1104, the zero screen 1102, the shielding layer 1103 and the partial pressure screens 1104 are all made of conductive materials, the shielding layer 1103 is a conductive cylinder sleeved outside the high-voltage conductor 1101, the shielding layer 1103 is sleeved with a plurality of partial pressure screens 1104, the shielding layer 1103 and the plurality of partial pressure screens 1104 are coaxial, the length of the plurality of partial pressure screens 1104 decreases from inner to outer in sequence to form a date core shape, the shielding layer 1103 and the partial pressure screens 1104 are separated by insulating layers, the zero screen 1102 is sleeved outside the partial pressure screens 1104, the zero screen 1102 is cylindrical, the inner wall of the zero screen 1102 is connected with the outermost partial pressure screens 1104 by the insulating layers, the outer wall of, the middle part of the outer wall of the insulating cylinder 1105 is provided with a connecting flange 1200, the insulating cylinder 1105 is connected with the transformer 200 through the connecting flange 1200, and the bottom end of the transformer bushing 300 is connected with the flange of the insulating cylinder 1105.
In this embodiment, the multi-layer voltage dividing screen 1104 divides voltage layer by layer, the high voltage on the high-voltage conductor 1101 is gradually reduced, and the voltage is zero when reaching the zero screen 1102, the voltage dividing screens 1104 and the voltage dividing screens 1104 are connected with the zero screen 1102 or the shielding layer 1103 through insulating layers to bear the voltage between layers, when the vacuum interrupter 400 is in different static states or different action states, the electric field voltage equalizing mechanism 1100 can perform high voltage equalizing operation, thereby greatly improving the overall voltage withstand level of the transformer bushing 300, and solving the problem that the overall voltage withstand is not too high after the vacuum interrupter 400 is additionally arranged in the transformer bushing 300.
EXAMPLE III
The third embodiment is basically the same as the first embodiment in technical solution, and the difference is that: as shown in fig. 5, the operating mechanism in this embodiment is a spring operating mechanism 1000, the spring operating mechanism 1000 is connected to a connecting lever 1002 through an operating rod 1001, and the connecting lever is connected to a pull rod at the upper end of the vacuum interrupter 400. The spring operating mechanism is of conventional design.
Example four
The fourth embodiment is basically the same as the first embodiment in technical solution, and the difference is that: the vacuum interrupter 400 in this embodiment is disposed in an interrupter sleeve, the interrupter sleeve in which the vacuum interrupter 400 is installed is disposed in a transformer sleeve 300, and a second insulating gel layer for fixing the interrupter sleeve and isolating the vacuum interrupter 400 from transformer oil is filled between the interrupter sleeve and the transformer sleeve 300. The arc extinguish chamber sleeve is a capacitor sleeve wound by epoxy glass cloth or an epoxy resin sleeve cast by epoxy resin. The arc extinguish chamber sleeve in the embodiment is a capacitor sleeve wound by epoxy glass cloth.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. The utility model provides a novel transmission and transformation substation device, includes low-voltage cabinet (100), transformer (200), and low-voltage cabinet (100) are hung and are leaned on in transformer (200) one side, are connected with transformer bushing (300) on transformer (200), its characterized in that: a vacuum arc-extinguishing chamber (400) is arranged in the transformer bushing (300), and a first insulating gel layer (500) for fixing the vacuum arc-extinguishing chamber (400) and isolating the vacuum arc-extinguishing chamber (400) from transformer oil is filled between the vacuum arc-extinguishing chamber (400) and the transformer bushing (300); the lower end of the vacuum arc extinguish chamber (400) is directly connected with the transformer (200), and the pull rod at the upper end of the vacuum arc extinguish chamber (400) is connected with an operating mechanism for controlling the opening/closing action of the vacuum arc extinguish chamber.
2. The new transmission and substation device of claim 1, characterized in that: vacuum interrupter (400) set up in the explosion chamber sleeve pipe, and the explosion chamber sleeve pipe setting of installing vacuum interrupter (400) is in transformer bushing (300), and it is used for fixed explosion chamber sleeve pipe and with the second insulating gel layer of vacuum interrupter and transformer oil isolation to fill between explosion chamber sleeve pipe and transformer bushing (300).
3. A novel electric power transmission and transformation station apparatus as claimed in claim 1 or 2, wherein: and an electric field voltage-sharing device is arranged at the direct connection position of the vacuum arc-extinguishing chamber and the transformer.
4. The new transmission and substation device of claim 3, wherein: the lower end of the transformer bushing (400) is provided with an electronic voltage/current transformer (600).
5. The new transmission and substation device of claim 4, wherein: the operating mechanism is a permanent magnet operating mechanism (700) or a spring operating mechanism (1000).
6. The new transmission and substation device of claim 5, wherein: the arc extinguish chamber sleeve is a capacitor sleeve wound by epoxy glass cloth or an epoxy resin sleeve cast by epoxy resin.
CN202010045585.4A 2020-01-16 2020-01-16 Novel transmission and transformation station device Pending CN111048351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010045585.4A CN111048351A (en) 2020-01-16 2020-01-16 Novel transmission and transformation station device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010045585.4A CN111048351A (en) 2020-01-16 2020-01-16 Novel transmission and transformation station device

Publications (1)

Publication Number Publication Date
CN111048351A true CN111048351A (en) 2020-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010045585.4A Pending CN111048351A (en) 2020-01-16 2020-01-16 Novel transmission and transformation station device

Country Status (1)

Country Link
CN (1) CN111048351A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023070779A1 (en) * 2021-10-27 2023-05-04 中国南方电网有限责任公司超高压输电公司检修试验中心 Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023070779A1 (en) * 2021-10-27 2023-05-04 中国南方电网有限责任公司超高压输电公司检修试验中心 Vacuum arc-extinguishing chamber test system for transformer on-load tap-changer and method therefor

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