CN116799684A - Box auto-change over device of on-load tap-changer - Google Patents
Box auto-change over device of on-load tap-changer Download PDFInfo
- Publication number
- CN116799684A CN116799684A CN202310822572.7A CN202310822572A CN116799684A CN 116799684 A CN116799684 A CN 116799684A CN 202310822572 A CN202310822572 A CN 202310822572A CN 116799684 A CN116799684 A CN 116799684A
- Authority
- CN
- China
- Prior art keywords
- box body
- box
- changer
- over switch
- load tap
- 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
Links
- 230000007704 transition Effects 0.000 claims description 14
- 239000012212 insulator Substances 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- 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
-
- 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
- H02B1/46—Boxes; 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
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
- H02B1/48—Mounting of devices therein
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a box-type switching device of an on-load tap-changer, which comprises a box body, wherein a high-voltage equipment area and a low-voltage equipment area are arranged in the box body; a three-phase change-over switch is arranged in a high-voltage equipment area of the box body, an alternating current-direct current integrated distribution box and a control cabinet are arranged in a low-voltage equipment area of the box body, and cable bridges are arranged on two sides of the box body; the alternating current-direct current integrated distribution box provides alternating current-direct current working voltage for a control cabinet, a three-phase change-over switch and box auxiliary control equipment, and the control cabinet provides control output logic fixed value for the three-phase change-over switch. The device provides a scheme of a box-type movable on-load tap-changer switching device with engineering implementation, and can realize oilless and overall process state monitoring and high reliability of the tap-changer.
Description
Technical Field
The invention relates to a box-type switching device of an on-load tap-changer.
Background
With the rapid development of the power grid construction in China, the on-load tap-changer is widely used as an on-line voltage regulating device. The existing on-load tap-changer, whether it is of a non-vacuum type or a vacuum type, needs to adopt insulating oil as a medium for switching off or radiating, and because the on-load tap-changer is installed inside a transformer, the on-load tap-changer is extremely easy to generate fire explosion when the on-load tap-changer fails, so that the whole transformer is completely burnt, and the consequence is serious.
In order to reduce the influence of the fault of the on-load tap-changer on the transformer body, fundamentally solve the problems that the existing on-load tap-changer has breakdown of an insulating oil gap, the switching action cannot be controlled after mechanical parts are damaged, no effective state monitoring means exists and the like, avoid the ignition of the transformer, and provide a novel on-load tap-changer box-type switching device.
Disclosure of Invention
The invention aims to provide a box-type switching device of an on-load tap-changer, which adopts an external container pre-installation mode for the switching device in the on-load tap-changer and can realize oilless and overall process state monitoring and high reliability of the tap-changer.
In order to achieve the above object, the solution of the present invention is:
the on-load tap-changer box-type switching device comprises a box body, wherein a high-voltage equipment area and a low-voltage equipment area are arranged in the box body; a three-phase change-over switch is arranged in a high-voltage equipment area of the box body, an alternating current-direct current integrated distribution box and a control cabinet are arranged in a low-voltage equipment area of the box body, and cable bridges are arranged on two sides of the box body;
the alternating current-direct current integrated distribution box provides alternating current-direct current working voltage for a control cabinet, a three-phase change-over switch and box auxiliary control equipment, and the control cabinet provides control output logic fixed value for the three-phase change-over switch.
The box body is of a section bar frame structure, equipment inlet and outlet double-opening doors are arranged along the length direction of the box body, and personnel overhaul single-opening doors are arranged along the width direction of the box body.
The auxiliary control equipment for the box body comprises an industrial air conditioner, a lamplight lighting device, an emergency lamp, a smoke alarm device and a fire extinguisher which are arranged on the box body.
The three-phase change-over switch comprises A, B, C three phases which are independently arranged; each phase adopts symmetrical arrangement and comprises a transition resistor, a wall bushing, a vacuum switch, a lightning arrester, a post insulator, an isolation transformer, a control unit and a current transformer, wherein each phase of the phase-change switch comprises a switch layer and a control driving layer, the switch layer comprises N groups of vacuum switches, the control driving layer comprises N groups of switch opening and closing control units, and N is an integer larger than 1;
the upper side of each phase of the change-over switch is provided with 1 first wall bushing, N second wall bushing and N third wall bushing which are fixed on the box body, wherein the first wall bushing is arranged in the center and is used as a neutral point outlet end and electrically connected with a pipe nut on the upper side of the cable bridge; n second wall bushings are arranged on two sides of the first wall bushing, and after each second wall bushing is respectively connected with the transition resistor in series, the second wall bushing is correspondingly connected with N groups of vacuum switches in parallel; the N third wall bushings are arranged on the outer sides of the second wall bushings, the outer sides of the third wall bushings are electrically connected with the outlet ends of the converter transformer through cables, and the inner sides of the third wall bushings are correspondingly and electrically connected with the N groups of vacuum switches respectively;
the lightning arresters are arranged on two sides of the switch layer and are bridged between wall bushings on the same side; the support insulator is arranged at the bottom of the change-over switch through a screw, and the bottom of the support insulator is fixed on the bottom plate of the box body; the isolation transformer is arranged at the lower side of the change-over switch and is fixed on the bottom plate of the box body; the current transformer is fixed on the upper side of the change-over switch through a bracket.
One side of the cable bridge is connected with the converter transformer, and the other side is connected with the wall bushing at the top of the box body.
The transition resistor is arranged at the top of the box body.
The top of the box body adopts a slope top.
After the scheme is adopted, the invention has the following positive effects: after the on-load tap-changer box-type switching device is adopted, the on-load tap-changer box-type switching device comprises a box body, wherein a high-voltage equipment area and a low-voltage equipment area are arranged in the box body, a three-phase change-over switch is arranged in the high-voltage equipment area of the box body, an alternating-current and direct-current integrated distribution box and a control cabinet are arranged in the low-voltage equipment area of the box body, the alternating-current and direct-current integrated distribution box provides alternating-current and direct-current working voltages for the three-phase change-over switch and the control cabinet, and the control cabinet provides control output logic fixed values for the three-phase change-over switch. In addition, the top of the box body adopts a slope top scheme design, so that the area of the top of the box body can be increased, and the equipment installation and arrangement capacity is improved; the transition resistor of the change-over switch is arranged at the top of the box body, and the transition resistor is cooled through natural heat dissipation, so that the high-temperature influence of the conventional on-load tap-changer on surrounding equipment caused by the arrangement of the transition resistor inside the box body is avoided. The invention provides a scheme of a box type movable on-load tap-changer switching device with engineering implementation.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a top view of one embodiment of the present invention;
FIG. 3 is a side view of a particular embodiment of the present invention;
FIG. 4 is another schematic view of FIG. 3;
fig. 5 is a front view of the single phase transfer switch of the present invention;
fig. 6 is a perspective view of a single-phase change-over switch of the present invention.
Reference numerals:
1-box body, 2-three-phase change-over switch, 3-control cabinet, 4-AC/DC integrated distribution box and 5-cable bridge;
21-transition resistance, 22-wall bushing, 23-vacuum switch, 24-arrester, 25-post insulator,
26-isolation transformer, 27-control unit, 28-current transformer, 29-shorting stub.
Detailed Description
The technical scheme and beneficial effects of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a box-type switching device of an on-load tap changer, which comprises a box body 1, wherein a high-voltage equipment area and a low-voltage equipment area are divided into the box body 1, a three-phase change-over switch 2 is arranged in the high-voltage equipment area of the box body 1, an alternating-current and direct-current integrated distribution box 4 and a control cabinet 3 are arranged in the low-voltage equipment area of the box body 1, the alternating-current and direct-current integrated distribution box 4 provides alternating-current and direct-current working voltages for the control cabinet 3, the three-phase change-over switch 2 and auxiliary control equipment of the box body, and the control cabinet 3 provides control output logic fixed values for the three-phase change-over switch; two sides of the box body 1 are provided with cable bridges 5, one side of the cable bridges is connected with the converter transformer, and the other side of the cable bridges is connected with a wall bushing at the top of the box body.
The box 1 is in a profile frame structure, is provided with equipment in-out double-opening doors on the side wall of the box in the length direction, is provided with personnel overhaul single-opening doors in the width direction, and is provided with related auxiliary control equipment such as an industrial air conditioner, a lamplight illumination device, an emergency lamp, a smoke alarm device, a fire extinguisher and the like for the convenience of installation and maintenance and protection of external wiring.
As shown in fig. 5 and fig. 6, the three-phase change-over switch 2 includes a transition resistor 21, a wall bushing 22, a vacuum switch 23, a lightning arrester 24, a post insulator 25, an isolation transformer 26, a control unit 27, a current transformer 28 and a shorting stub 29, wherein the three-phase change-over switch includes A, B, C three phases, and the three phases are separately arranged, so that single-phase independent switching can be realized, and mechanical operations do not affect each other; A. each phase of the B, C three-phase change-over switch adopts symmetrical arrangement, each phase of the change-over switch comprises a switch layer and a control driving layer, the switch layer comprises 16 groups of vacuum switches 23 with long service life, and the control driving layer comprises 16 groups of switch opening and closing control units; 9 wall bushings 22 are arranged on the upper side of each phase of the three-phase change-over switch and are fixed on the box body 1, when the 9 wall bushings 22 are arranged, 1 wall bushing is arranged in the center, then 4 wall bushings are arranged on two sides of the wall bushing in a group, and 4 wall bushings are arranged on the outer side of the wall bushing in a group, wherein the outer sides of the 4 wall bushings on the outermost side are electrically connected with an outlet end of a converter transformer through cables, the inner sides of the wall bushings are electrically connected with 4 groups of vacuum switches of a switch layer respectively, and the 4 wall bushings on the inner sides of the wall bushing are respectively connected with 4 groups of vacuum switches 23 of the switch layer in parallel after being connected in series through shorting wires 29 and 4 groups of transition resistors 21 respectively; the central 1 wall bushing is a neutral point outlet end and is electrically connected with a pipe nut on the upper side of the cable bridge; the lightning arresters 24 are arranged on two sides of the switch layer and are bridged between 2 wall bushings 22 on the same side; the support insulator 25 is mounted at the bottom of the change-over switch through a screw and is used for supporting the single-phase change-over switch, and the bottom of the support insulator 25 is fixed with the bottom plate of the box body 1 through the screw; the isolation transformer 26 is arranged at the lower side of each phase change switch and is fixed on the bottom plate of the box body 1 through screws; the current transformer 28 is fixed to the upper side of each phase change switch by a bracket.
As a preferred embodiment of the present invention, the transition resistor 21 of the three-phase change-over switch 2 is installed at the top of the box 1, so that the transition resistor 21 is cooled by natural heat dissipation, and the high-temperature influence of the on-load tap-changer in the conventional structure on surrounding equipment caused by the arrangement of the transition resistor inside is avoided.
As a preferred embodiment of the invention, the top of the box body 1 adopts a slope top scheme design, so that the top area of the box body is increased, and the equipment installation and arrangement capacity is improved.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereto, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the present invention.
Claims (7)
1. The utility model provides an on-load tap-changer box auto-change over device which characterized in that: comprises a box body (1), wherein the box body (1) is divided into a high-voltage equipment area and a low-voltage equipment area; a three-phase change-over switch (2) is arranged in a high-voltage equipment area of the box body (1), an alternating current-direct current integrated distribution box (4) and a control cabinet (3) are arranged in a low-voltage equipment area of the box body (1), and cable bridges (5) are arranged on two sides of the box body (1);
the alternating current-direct current integrated distribution box (4) provides alternating current-direct current working voltage for auxiliary control equipment of a control cabinet (3), a three-phase change-over switch (2) and a box body (4), and the control cabinet (3) provides control output logic fixed value for the three-phase change-over switch.
2. The on-load tap-changer box-type switching device of claim 1 wherein: the box body (1) is of a section bar frame structure, equipment inlet and outlet double-opening doors are arranged along the length direction of the box body, and personnel overhaul single-opening doors are arranged along the width direction of the box body.
3. The on-load tap-changer box-type switching device of claim 1 wherein: the auxiliary control equipment of the box body (4) comprises an industrial air conditioner, a lamplight lighting device, an emergency lamp, a smoke alarm device and a fire extinguisher which are arranged on the box body.
4. The on-load tap-changer box-type switching device of claim 1 wherein: the three-phase change-over switch (2) comprises A, B, C three phases which are independently arranged; each phase adopts symmetrical arrangement and comprises a transition resistor (21), a wall bushing (22), a vacuum switch (23), a lightning arrester (24), a post insulator (25), an isolation transformer (26), a control unit (27) and a current transformer (28), wherein each phase of the phase-change switch comprises a switch layer and a control driving layer, the switch layer comprises N groups of vacuum switches (23), the control driving layer comprises N groups of switch opening and closing control units (27), and N is an integer greater than 1;
the upper side of each phase of the change-over switch is provided with 1 first wall bushing, N second wall bushing and N third wall bushing which are fixed on the box body (1), wherein the first wall bushing is arranged in the center and is used as a neutral point outlet end and electrically connected with a pipe nut on the upper side of the cable bridge; n second wall bushings are arranged on two sides of the first wall bushing, and after each second wall bushing is respectively connected with the transition resistor in series, the second wall bushing is correspondingly connected with N groups of vacuum switches in parallel; the N third wall bushings are arranged on the outer sides of the second wall bushings, the outer sides of the third wall bushings are electrically connected with the outlet ends of the converter transformer through cables, and the inner sides of the third wall bushings are correspondingly and electrically connected with the N groups of vacuum switches respectively;
the lightning arresters (24) are arranged on two sides of the switch layer and are bridged between the wall bushings on the same side; the post insulator (25) is arranged at the bottom of the change-over switch through a screw, and the bottom of the post insulator (25) is fixed on the bottom plate of the box body (1); the isolation transformer (26) is arranged at the lower side of the change-over switch and is fixed on the bottom plate of the box body (1); the current transformer (28) is fixed on the upper side of the change-over switch through a bracket.
5. The on-load tap-changer box-type switching device of claim 4 wherein: one side of the cable bridge is connected with the converter transformer, and the other side of the cable bridge is connected with the wall bushing at the top of the box body.
6. The on-load tap-changer box-type switching device of claim 4 wherein: the transition resistor is arranged at the top of the box body.
7. The on-load tap-changer box-type switching device of claim 1 wherein: the top of the box body adopts a slope top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310822572.7A CN116799684A (en) | 2023-07-06 | 2023-07-06 | Box auto-change over device of on-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310822572.7A CN116799684A (en) | 2023-07-06 | 2023-07-06 | Box auto-change over device of on-load tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116799684A true CN116799684A (en) | 2023-09-22 |
Family
ID=88037430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310822572.7A Pending CN116799684A (en) | 2023-07-06 | 2023-07-06 | Box auto-change over device of on-load tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116799684A (en) |
-
2023
- 2023-07-06 CN CN202310822572.7A patent/CN116799684A/en active Pending
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