CN202736729U - Electronic current and voltage transformer for 126kV GIS (Global Information System) - Google Patents
Electronic current and voltage transformer for 126kV GIS (Global Information System) Download PDFInfo
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- CN202736729U CN202736729U CN 201220313492 CN201220313492U CN202736729U CN 202736729 U CN202736729 U CN 202736729U CN 201220313492 CN201220313492 CN 201220313492 CN 201220313492 U CN201220313492 U CN 201220313492U CN 202736729 U CN202736729 U CN 202736729U
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Abstract
The utility model discloses an electronic current and voltage transformer for a 126kV GIS (Global Information System), wherein the electronic current and voltage transformer comprises three shielding cylinders, a fixing flange plate and a shell; each shielding cylinder comprises a capacitance shielding cylinder and a current shielding cylinder, which are fixedly connected with each other, the current shielding cylinders are fixedly connected with the fixing flange plate and are fastened with the shell to form ground shielding; the three shielding cylinders are uniformly arranged along the circumference, and a segment of a convex ring is arranged at the middle part of each capacitance shielding cylinder; three primary conductors are passed through the axes of the shielding cylinders and are insulated from the shielding cylinders; three capacitance rings are insulated from the capacitance shielding cylinders through insulating pads and are clamped and fixed on the inner sides of the convex rings of the three capacitance shielding cylinders, three current coils are integrally poured and are sleeved on the outer walls of the three current shielding cylinders. The structure is used as the structure of a novel transformer and is capable of simultaneously measuring voltage signals and current signals to combine voltage measurement with current measurement, the measuring precision is high, the assembly is simple and the cost is low.
Description
Technical field:
The utility model relates to a kind of 126kV Cubicle Gas-Insulated Switchgear (GIS) and uses electronic current-voltage combination transformer, and it is applicable to electric energy metrical, relaying protection and the electric quantity monitoring of three-phase combined type 126kV GIS switch.
Background technology:
Current transformer and voltage transformer traditional among the 126kV GIS are induction, its complex structure, volume are large, Heavy Weight, analog output, especially second open circuit and short circuit problem can bring harm to equipment and personnel, and because the principle restriction, both can not structurally unite two into one.Along with the development of intelligent grid, the requirement of the intellectuality of its switching devices, miniaturization, Composite, high reliability is also more and more higher.
The utility model content:
The utility model is in order to solve the Intelligent transformer station requirement; provide a kind of current transformer and voltage transformer to combine; realize digital output, satisfy the 126kV Cubicle Gas-Insulated Switchgear (GIS) of measurement, metering and protection required precision and use the electronic type current-voltage transformer.
For reaching above purpose, the utility model takes following technical scheme to be achieved:
A kind of 126kV GIS electronic type current-voltage transformer comprises three shielding cylinders, a mounting flange plate and a shell; Shielding cylinder comprises capacitance shield cylinder and the current shielding cylinder that is mutually permanently connected, and is fastening with shell after current shielding cylinder and mounting flange plate are fastenedly connected, and forms over the ground to shield; Three shielding cylinders are evenly arranged by the circumference mode, and one section bulge loop is arranged in the middle of the capacitance shield cylinder; Three Primary Conductor are passed by the shielding cylinder axle center of correspondence respectively, and insulate with shielding cylinder; Three electric capacity rings are by insulation cushion and the insulation of capacitance shield cylinder and be fixedly clamped inboard in the bulge loop of three capacitance shield cylinders; Three current coils are integrated poured, are enclosed within the outer wall of three current shielding cylinders; Terminal box places the open outer side of shell, and the sealed end daughter board is positioned at terminal box, and with the closure of openings of shell; Three current coils and three electric capacity rings are by the sealed end daughter board of shielded type cable connecting band epoxy casting copper plug, and the sealing terminal board is outside to join with signal processing unit.
The utility model further improves and is: described 126KV GIS also comprises three screw rods and three crimping flanges with the electronic type current-voltage transformer, and an end of screw rod is fastened on the mounting flange plate, and the other end is fixed on the crimping flange; Three shielding cylinders all are fastenedly connected with mounting flange plate, crimping flange and screw rod, and cantilever-shaped is fixed on the mounting flange plate.
The utility model further improves and is: between crimping flange and the electric capacity ring shielding cylinder insulating case is housed.
The utility model further improves and is: corresponding electric capacity ring, electric capacity ring shielding cylinder and Primary Conductor consist of capacitor voltage divider.
The utility model further improves and is: per two semi-rings cooperation is connected to the outer wall of current shielding cylinder and is fastenedly connected, and described semi-ring is provided with fin, and current shielding cylinder periphery is provided with the groove of the fin of clamping semi-ring.
The utility model further improves and is: described three shielding cylinders all are connected with mounting flange, place in the air chamber, arrange by the circumference mode, respectively as A, B, C three-phase.
In the such scheme, the electric capacity ring clamps by the two ends dead ring, and the unsettled bulge loop of capacitance shield cylinder that places is inboard, and this structure can prevent the phase mutual interference of voltage on the three-phase conductor, affects the certainty of measurement of voltage.
In the such scheme, each current coil is pressed on the plane of mounting flange by the crimping screw pressure on two semi-rings; Adopt this fixed form, fixedly the current coil of differing heights.
In the such scheme, carry out the partition of electric loop between capacitance shield cylinder and the crimping flange with dead ring, prevent from forming the induced current loop between current shielding cylinder, capacitance shield cylinder, screw rod and mounting flange, the crimping flange, affect the certainty of measurement of current coil.
In the such scheme, an end of screw rod relies on fastening nuts on the mounting flange plate, and the other end adopts same method to be fastened on the crimping flanged plate, plays fastening, as to connect two side flanges effect, and the three-phase combining structure is fixed together, and forms overall structure.
With respect to prior art, the utility model has the advantage of: insulation system is simple, volume is little, lightweight, cost is low; The harm that the second short circuit that has overcome the second open circuit of current transformer and voltage transformer brings equipment and personnel; Electric capacity ring summation current transformer is combined cleverly, realized the fusion design of voltage, current transformer, utilize current coil sensing primary current, utilize electric capacity ring sensing primary voltage; Export direct and digitlization secondary device interface, can adapt to the demand of digital transformer substation development; The convex design of capacitance shield cylinder can prevent the phase mutual interference of three-phase voltage simultaneously, affects the certainty of measurement of voltage; Current coil relies on the mode that holds out against of bolt, and the current coil that can adapt to differing heights is installed.Whole cantilever beam structure has reduced the operation that is connected with shell, has increased the reliability of equipment, simultaneously simple installation.
Description of drawings:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is cutaway view of the present utility model;
Among the figure: 1, mounting flange plate; 2, shell; 3, screw rod; 4, crimping flange; 5, Primary Conductor; 6, insulation cushion; 7, electric capacity ring; 8, capacitance shield cylinder; 9, semi-ring; 10, current coil; 11, current shielding cylinder; 12, sealed end daughter board; 13, terminal box; 14, dead ring; 15, shielded type cable.
Embodiment:
Below in conjunction with accompanying drawing and instantiation structure of the present utility model and operation principle are further described.
As shown in Figure 1, 2, the utility model provides a kind of 126kV gas-insulated switch (GIS) with electronic type current-voltage transformer (EVCT), comprises a mounting flange plate 1, three screw rods 3, crimping flange 4, three Primary Conductor 5, six insulation cushions 6, three electric capacity rings 7, three capacitance shield cylinders 8, six semi-rings 9, three current coils 10, three current shielding cylinders 11, sealed end daughter board 12, terminal box 13, three dead rings 14, shielded type cable 15.
Capacitance shield cylinder 8 and current shielding cylinder 11 are mutually permanently connected, after three groups of current shielding cylinders 11 are fastenedly connected with mounting flange plate 1 and shell 2 fastening, three groups of current shielding cylinders 11 arrange respectively as A, B, C three-phase, one section bulge loop is arranged in the middle of the capacitance shield cylinder 8 by the circumference mode; Three Primary Conductor 5 are passed by the axle center of three shielding cylinders respectively, and the insulation distance certain with the shielding cylinder maintenance; Three electric capacity rings 7 are by 6 insulation of teflon insulation pad and be fixedly clamped inboardly in the bulge loop of three capacitance shield cylinders 8, and electric capacity ring 7 and capacitance shield cylinder 8, Primary Conductor 5 consist of capacitor voltage dividers like this, for the tested primary voltage information of sensing; Three current coils 10 are integrated poured, are enclosed within the outer wall of three current shielding cylinders 11; Terminal box 13 places the open outer side of shell 2, and sealed end daughter board 12 is positioned at terminal box 13, and with the closure of openings of shell 2, guarantees the sealing of internal gas; The output line of three current coils 10, three electric capacity rings 7 respectively by with the sealed end daughter board 12 of epoxy cast copper plug be connected secondary device and connect.
Current coil 10 utilizes screw to hold out against on mounting flange 1 by two semi-rings 9 that are connected on the current shielding cylinder 11.
One end of screw rod 3 is fastened on the crimping flange 4, and the other end is fastened on the mounting flange plate 1, forms one-sided cantilever design.
When capacitance shield cylinder 8 is fastenedly connected with crimping flange 4, the centre installs insulating case 14 additional, be used for blocking Primary Conductor 5 when charged, the induced current loop that forms between current shielding cylinder 11, capacitance shield cylinder 8, crimping flange 4, mounting flange 1 guarantees the certainty of measurement of current coil 10.
During the utility model work, the tested primary current information of current coil 10 sensing three-phases; The three phase capacitance voltage divider that electric capacity ring 7, capacitance shield cylinder 8 and Primary Conductor 5 consist of is the tested primary voltage information of sensing three-phase respectively; Current coil 10 and electric capacity ring 7 composite designs are in the same place herein, measure when can realize three-phase primary current and voltage, then the signal of three-phase current coil 10 and electric capacity ring 7 is connected on the sealed end daughter board 12 with epoxy cast copper plug by shielded type cable 15, and the external signal processing unit that is installed in the terminal box 13 joins.
The master is noted that three electric capacity rings 7 are inboard by the bulge loop that insulation cushion 6 is individually fixed in capacitance shield cylinder 8, and wherein, electric capacity ring 7 consists of high-voltage capacitances with Primary Conductor 5, and the medium of this high-voltage capacitance is SF
6Gas, electric capacity ring 7 consists of low-voltage capacitance with capacitance shield cylinder 8.
Above content is the detailed description of the utility model being done in conjunction with concrete optimal way; can not assert that execution mode of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; all any simple modification and equivalent structure transformation or modifications of doing according to the utility model Spirit Essence all belong to the definite scope of patent protection of claims that the utility model is submitted to.
Claims (6)
1. a 126kV GIS electronic type current-voltage transformer is characterized in that: comprise three shielding cylinders, a mounting flange plate (1) and a shell (2); Shielding cylinder comprises capacitance shield cylinder (8) and the current shielding cylinder (11) that is mutually permanently connected, and is fastening with shell (2) after current shielding cylinder (11) and mounting flange plate (1) are fastenedly connected, and forms over the ground to shield; Three shielding cylinders are evenly arranged by the circumference mode, and one section bulge loop is arranged in the middle of the capacitance shield cylinder (8); Three Primary Conductor (5) are passed by the shielding cylinder axle center of correspondence respectively, and insulate with shielding cylinder; Three electric capacity rings (7) insulate by insulation cushion (6) and are fixedly clamped in the bulge loop inboard of three capacitance shield cylinders (8), and three current coils (10) are integrated poured, are enclosed within the outer wall of three current shielding cylinders (11); Terminal box (13) places the open outer side of shell (2), and sealed end daughter board (12) is positioned at terminal box (13), and with the closure of openings of shell (2); Three current coils (10) and three electric capacity rings (7) are by the sealed end daughter board (12) of shielded type cable (15) connecting band epoxy casting copper plug, and sealing terminal board (12) connects the external signal processing unit.
2. 126kV GIS electronic type current-voltage transformer according to claim 1, it is characterized in that: described 126KV GIS also comprises three screw rods (3) and a crimping flange (4) with the electronic type current-voltage transformer, one end of screw rod (3) is fastened on the mounting flange plate (1), and the other end is fixed on the crimping flange (4); Three shielding cylinders all are fastenedly connected with mounting flange plate (1), crimping flange (4) and screw rod (3), and cantilever-shaped is fixed on the mounting flange plate (1).
3. 126kV GIS electronic type current-voltage transformer according to claim 2 is characterized in that: between crimping flange (4) and the electric capacity ring shielding cylinder (8) dead ring (14) is housed.
4. 126kV GIS electronic type current-voltage transformer according to claim 1 is characterized in that: corresponding electric capacity ring (7), electric capacity ring shielding cylinder (8) and Primary Conductor (5) formation capacitor voltage divider.
5. 126kV GIS electronic type current-voltage transformer according to claim 1, it is characterized in that: per two semi-rings (9) cooperation is connected to the outer wall of current shielding cylinder (11) and is fastenedly connected, and semi-ring (9) holds out against current coil (10) on mounting flange (1) by screw.
6. 126kV GIS electronic type current-voltage transformer according to claim 5, it is characterized in that: described semi-ring (9) is provided with fin; Current shielding cylinder (11) periphery is provided with the groove of clamping semi-ring (9) fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220313492 CN202736729U (en) | 2012-06-29 | 2012-06-29 | Electronic current and voltage transformer for 126kV GIS (Global Information System) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220313492 CN202736729U (en) | 2012-06-29 | 2012-06-29 | Electronic current and voltage transformer for 126kV GIS (Global Information System) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202736729U true CN202736729U (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220313492 Expired - Lifetime CN202736729U (en) | 2012-06-29 | 2012-06-29 | Electronic current and voltage transformer for 126kV GIS (Global Information System) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202736729U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761913A (en) * | 2016-02-03 | 2016-07-13 | 四方继保（武汉）软件有限公司 | Electromagnetic shielding structure of GIS electronic mutual inductor |
| CN113871177A (en) * | 2021-08-25 | 2021-12-31 | 河南平高电气股份有限公司 | GIS and external current transformer |
-
2012
- 2012-06-29 CN CN 201220313492 patent/CN202736729U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761913A (en) * | 2016-02-03 | 2016-07-13 | 四方继保（武汉）软件有限公司 | Electromagnetic shielding structure of GIS electronic mutual inductor |
| CN105761913B (en) * | 2016-02-03 | 2017-07-18 | 四方继保（武汉）软件有限公司 | A kind of electromagnetic armouring structure of GIS electronic transformer |
| CN113871177A (en) * | 2021-08-25 | 2021-12-31 | 河南平高电气股份有限公司 | GIS and external current transformer |
| CN113871177B (en) * | 2021-08-25 | 2024-04-09 | 河南平高电气股份有限公司 | GIS and external current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |