CN106872750A - A kind of equal potential shielded capacitor voltage transformer insulator - Google Patents
A kind of equal potential shielded capacitor voltage transformer insulator Download PDFInfo
- Publication number
- CN106872750A CN106872750A CN201510920389.6A CN201510920389A CN106872750A CN 106872750 A CN106872750 A CN 106872750A CN 201510920389 A CN201510920389 A CN 201510920389A CN 106872750 A CN106872750 A CN 106872750A
- Authority
- CN
- China
- Prior art keywords
- insulator
- capacitor
- voltage transformer
- flange
- equal potential
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The present invention relates to a kind of equal potential shielded capacitor voltage transformer insulator, the voltage transformer includes the equivalent potential screen capacitor unit that the pivot flange being provided with by its two ends is connected with each other, and the equivalent potential screen capacitor unit includes being arranged on main capacitor, interior insulation material, annular electrode and insulating sleeve between the pivot flange up and down, be sequentially coaxially provided with from inside to outside；Insulator is provided between the main capacitor and the pivot flange, the insulator is located on the axle center of the insulating sleeve, the insulator bottom is arranged in the pivot flange central recess, and the insulator top is connected by guide flange with the main capacitor.The special compact structure design of insulator in the present invention also causes that its inner space is fully used, volume is minimized, so as to reduce the height and diameter dimension of equivalent potential screen capacitor unit, and then make whole capacitance type potential transformer weight of equipment light, strengthen its antidetonation mechanical performance.
Description
Technical field
The present invention relates to a kind of capacitance type potential transformer, in particular to a kind of equal potential shielded capacitor voltage transformer is with absolutely
Edge.
Background technology
AC extra high voltage technology of transmission of electricity is developed rapidly, and the accurate measurement to extra-high voltage grid voltage proposes high request.It is existing
High voltage meter mainly has following three kinds：Electromagnetic potential transformer, capacitance type potential transformer and electronic type voltage mutual inductance
Device.Electromagnetic potential transformer is used for the voltage measurement of below 110kV voltage class, and capacitance type potential transformer is commonly used to
The voltage measurement of 110kV aboves.Electronic type voltage transformer is still within research and development and experimental stage, its voltage at present
The problems such as certainty of measurement, laser life-span, system reliability, need to further be researched and solved, and engineer applied is had not been put at present.
Voltage class for more than 500kV, especially for extra-high voltage grade (1000kV), because insulation is difficult and easily exists
There is ferromagnetic resonance and then trigger electric power accident, electromagnetic potential transformer not to use in primary side.Because its simple structure, making
Valency is cheap, primary side will not occur ferromagnetic resonance, high reliability with power network, and capacitance type potential transformer has been widely used
In the measurement of ultra-high/extra-high voltage voltage class line voltage.
But ultra-high/extra-high voltage field is applied to, capacitance type potential transformer is remained in following technical difficulty：
(1) stray capacitance can influence capacitance type potential transformer accuracy of measurement
NORTHWEST CHINA power network 750kV capacitance type potential transformer actual measured results show that the measurement that stray capacitance causes over the ground is missed
Difference up to more than 0.2%.Shadow of the stray capacitance to accuracy measurement is reduced by the method using increase capacitance in the industry at present
Ring.But for extra-high voltage grade (1000kV and more than), stray capacitive currents are significantly increased, up to 20mA.Now
Capacitance type potential transformer, even if capacitance increases to 10000pf, its class of accuracy is also unable to reach 0.1 grade of standard.
(2) field-checking is difficult
Usual capacitance type potential transformer install at the scene after, it is necessary to carry out field-checking so that timely contrast differences and angular difference are repaiied
Just.But in ultra-high voltage transformer station, because the factors such as the serious electromagnetic interference in transformer station's place situation, scene are present, so right
It is extremely difficult that extra-high voltage capacitor voltage transformer carries out field-checking.
(3) transient state individual features problem
The extensive use of digital relay protection system proposes higher and higher requirement to the response characteristic of voltage transformer, it is desirable to
Transformer secondary voltage should quick and precisely reflect the change of primary voltage.Relevant regulatory requirements, after transformer primary shorted to earth,
Secondary voltage should be down to less than the 0.1 of initial value within 0.2 second.Existing CVT is using the ferromagnetic resonance of energy-storage travelling wave tube composition
Damper, to suppress issuable ferromagnetic resonance in electromagnetic unit.The introducing of energy-storage travelling wave tube makes the response characteristic of transformer be deteriorated,
It is difficult to meet the requirement that extra-high voltage grid relay protection is quick and precisely acted.
Equivalent potential screen capacitor unit and the invention without energy-storage travelling wave tube ferromagnetic resonance damper and use, thoroughly solve above-mentioned skill
Art problem.Equivalent potential screen capacitor unit of the invention is for realizing the high precision electro of equal potential shielded capacitor voltage transformer
Pressure measurement plays a key effect.
The content of the invention
It is an object of the invention to provide a kind of equal potential shielded capacitor voltage transformer insulator, the capacitance type potential transformer
Certainty of measurement is high, and measurement stability is high, and lightweight, its antidetonation mechanical performance is stronger.
To achieve the above object, the present invention uses following technical scheme：A kind of equal potential shielded capacitor voltage transformer insulation
Son, the voltage transformer includes the capacitor unit that the pivot flange being provided with by its two ends is connected with each other, the capacitor list
Unit includes being arranged on capacitor, interior insulation material, annular between the upper and lower pivot flange, be sequentially coaxially provided with from inside to outside
Electrode and insulating sleeve；Insulator is provided between the capacitor and the pivot flange, the insulator is located at the insulation sleeve
Cylinder axle center on, the insulator bottom is arranged in the pivot flange, the insulator top by guide flange with it is described
Main capacitor is connected.
The axle of a kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, the insulator top and bottom
Circular groove is provided with line, Mume flower contact component is respectively equipped with the groove, two contact assemblies are by recessed through two
The metal embedded part connection of groove.
A kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, in touching for the insulator top and bottom ends
Head assembly is inserted into metal stick electrode；The insulator side is corrugated surface.
Another preferred a kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, it is characterised in that：Institute
It is the compact structure that once electrical connection, structure, insulation and sealing are integrated with the confined space to state insulator.
Another preferred a kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, the insulating sleeve
Top and bottom are respectively equipped with the sleeve flange being connected with the pivot flange.
Another preferred a kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, the guide flange
Inner headed face is arranged on outside the periphery of the insulator bottom, the inner circle of the guide flange being arranged at the top of the main capacitor
There is certain down suction between face and the insulator periphery, the size in the gap is by the guide flange, the insulator
Relative installation and the capacitor maximum swelling amount determine.
Another preferred a kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, sets in the gap
There is the valve rubber being affixed with the insulator periphery, the rubber mat thickness is less than the clearance distance；
The guide flange inner headed face of the capacitor bottom passes through rubber with the periphery of the insulator bottom corresponding thereto
Leather packing is connected.
Another preferred a kind of equal potential shielded capacitor voltage transformer insulator that the present invention is provided, is arranged on the electric capacity
The guide flange at the top of device is lived by the both sides of its inner headed face with the top periphery both sides of the insulator corresponding thereto
Dynamic connection；
The guide flange for being arranged on the capacitor bottom is flexibly connected with the insulator corresponding thereto.
A kind of another preferred equal potential shielded capacitor voltage transformer insulator that the present invention is provided, the insulator is installed
In circular groove at the pivot flange axis, the groove depth dimensions are highly determined by insulator installation bolt.
With immediate prior art ratio, the present invention provides technical scheme has following excellent effect：
1st, the part in the capacitance type potential transformer in the present invention can make each part when transport is jolted again with normal expansion
Buffered, it is to avoid destruction screened condenser；
2nd, the insulator in the present invention uses compact design, be integrated with the confined space once electrically, structure, insulation and close
Envelope design；
3rd, the special compact structure design of insulator in the present invention also causes that its inner space is fully used, exhausted meeting
Be minimized for volume on the premise of insulating by edge ectonexine, so as to reduce the height and diameter chi of equivalent potential screen capacitor unit
It is very little, and then make whole capacitance type potential transformer weight of equipment light, strengthen its antidetonation mechanical performance；
4th, it is relatively independent between the capacitor and insulator in the present invention, not over bolt connection, can at any time to electricity during installation
The position of container is finely adjusted, it is to avoid the generation of eccentricity issues；
5th, the valve rubber in the present invention serves cushioning effect, it is ensured that capacitor will not be damaged because jolting in transportation；
6th, the interstitial structure being provided with the present invention had both met the fixed requirement of capacitor, was avoided that capacitor due to volumetric expansion again
Damage.
Brief description of the drawings
Fig. 1 is equal potential shielded capacitor voltage transformer structural representation of the present invention；
Fig. 2 is that the equivalent potential screen capacitor unit of B in Fig. 1 of the present invention is connected with each other amplification axial section；
Fig. 3 is insulator front view of the invention；
Fig. 4 is insulator top view of the invention；
Fig. 5 is insulator upward view of the invention；
Fig. 6 is insulator sectional view of the invention；
Wherein, 1- capacitors, 2- insulating sleeves, 3- interior insulation materials, 4- sleeve flanges, 5- pivot flanges, 6- contact assemblies,
7- metal stick electrodes, 8- metal embedded parts, 9- insulators, 10- valve rubbers, 11- gaps, 12- guide flanges.
Specific embodiment
With reference to embodiment, the invention will be described in further detail.
As shown in figures 1 to 6, the invention equal potential shielded capacitor voltage transformer A of this example includes the support being provided with by its two ends
The capacitor unit that flange 5 is connected with each other, the capacitor unit include being arranged on it is between the upper and lower pivot flange 5, by interior
To the capacitor 1, interior insulation material 3, sleeve flange 4 and the insulating sleeve 2 that are sequentially coaxially provided with outward；The capacitor 1 with
Insulator 9 is provided between the pivot flange 5, the insulator 9 is located on the axle center of the insulating sleeve 2, the insulator 9
Bottom is arranged in the pivot flange 5, and the top of the insulator 9 is connected by guide flange 12 with the capacitor 1.
Circular groove is provided with the axis of the top of the insulator 9 and bottom, Mume flower contact component 6 is respectively equipped with the groove,
Two Mume flower contact components 6 are connected by through the metal embedded part 8 of two grooves.In the contact of the bottom of the insulator 9
Component 6 is inserted into metal stick electrode 7；The side of the insulator 9 is corrugated surface.The insulator 9 is in limited sky
The interior compact structure for being integrated with once electrical connection, structure, insulation and sealing.
The inner headed face of the guide flange 12 is arranged on outside the periphery of the bottom of the insulator 9, is arranged on the capacitor 1 and is pushed up
There are certain gap 11, the chi in the gap 11 between the inner headed face and the periphery of the insulator 9 of the guide flange 12 in portion
It is very little to need to come true by the maximum swelling amount of relative installation and the capacitor 1 of the guide flange 12 and the insulator 9
It is fixed.
Because in the presence of environment temperature and equipment itself operating temperature, the volume of capacitor 1 can accordingly change, especially
In the axial direction.The structure in the gap 11 had both met the fixed requirement of capacitor 1, was avoided that capacitor 1 due to volumetric expansion again
And damage.
The valve rubber 10 being affixed with the periphery of the insulator 9 is provided with the gap 11, the thickness of the valve rubber 10 is less than
The distance of the gap 11；The inner headed face of the guide flange 12 of the bottom of the capacitor 1 and the insulator corresponding thereto
The periphery of 9 bottoms is connected by valve rubber 10.The valve rubber 10 serves cushioning effect, it is ensured that electric capacity in transportation
Device 1 will not be damaged because jolting.Be arranged on the guide flange 12 at the top of the capacitor 1 by the both sides of its inner headed face with
The top periphery both sides of the insulator 9 corresponding thereto are flexibly connected；The described of the bottom of the capacitor 1 is arranged on to lead
It is flexibly connected with the insulator 9 corresponding thereto to flange 12.Due to being relative only between the capacitor 1 and insulator 9
It is vertical to be flexibly connected, fixed not over bolt, therefore can be carried out in time in the axial direction when eccentricity issues occurs in capacitor 1 micro-
Adjust, it is ensured that the smooth installation at the two ends of capacitor 1 is fixed.The two ends of the capacitor 1 are solid with the insulator 9 by said structure
It is fixed, capacitor 1 is diametrically moved, will not topple over due to jolting in transit, reach fixed purpose.
Radial insulation between capacitor 1 and sleeve flange 4 and pivot flange 5 is：With gas insulating material, insulating oil or its
He is met between the holding capacitor device unit of the interior insulation material 3 inside main capacitor 1 of requirement and sleeve flange 4 and pivot flange 5
The good insulation of radial direction.
Axial dielectric between capacitor 1 and sleeve flange 4 and pivot flange 5 is：Sleeve flange 4 and pivot flange 5 etc.
Current potential, thus 1 liang of end flanges of capacitor and the two ends pivot flange 5 of insulating sleeve 2 the axle of capacitor 1 upwardly through it is multi-functional absolutely
Edge 9 realizes good insulation.The exterior lateral sides of the insulator 9 design corrugated surface to ensure enough creep age distances, together
When farthest reduce the vertical height of insulator 9.
The electrical connection of the capacitor 1 is：The top and bottom of Multifunctional insulator 9 designs fluted, two Mume flower contact groups
Part 6 is located in two grooves respectively, is connected with the metal embedded part 8 on the central axis of insulator 9, in both sides plum blossom
Contact assembly 6 is inserted into metal stick electrode 7, respectively the pivot flange 5 with capacitor 1 and the plum blossom of neighboring capacitors unit
Contact is electrically connected.This connected mode is simple and easy to apply.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, although with reference to upper
State embodiment to be described in detail the present invention, those of ordinary skill in the art should be understood：Still can be to the present invention
Specific embodiment modify or equivalent, and any modification without departing from spirit and scope of the invention or equally replace
Change, it all should cover in the middle of present claims scope.
Claims (8)
1. a kind of equal potential shielded capacitor voltage transformer insulator, the voltage transformer includes what is be provided with by its two ends
The equivalent potential screen capacitor unit that pivot flange is connected with each other, the equivalent potential screen capacitor unit includes being arranged on upper and lower institute
State main capacitor, interior insulation material, annular electrode and insulating sleeve between pivot flange, be sequentially coaxially provided with from inside to outside；
Insulator is provided between the main capacitor and the pivot flange, the insulator is located on the axle center of the insulating sleeve, its
It is characterised by, the insulator bottom is arranged in the pivot flange central circular groove, the insulator top is by being oriented to
Flange is connected with the main capacitor.
2. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 1, it is characterised in that described
Circular groove is provided with the axis of insulator top and bottom, Mume flower contact component, the sets of contacts are respectively equipped with the groove
Part is connected by the metal embedded part through groove.
3. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 2, it is characterised in that in institute
The contact assembly for stating insulator top and bottom end is inserted into metal stick electrode；The insulator side is corrugated surface.
4. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 1, it is characterised in that described
Insulator is the compact structure that electrical connection, structure, insulation and sealing are integrated with the confined space.
5. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 1, it is characterised in that described
The inner headed face of guide flange is arranged on outside the periphery of the insulator bottom, is arranged on the guiding at the top of the main capacitor
Have certain down suction between the inner headed face of flange and the insulator periphery, the size in the gap by the guide flange,
The relative installation of the insulator and the main capacitor maximum swelling amount determine.
6. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 5, it is characterised in that：Institute
The valve rubber for being provided with gap and being affixed with the insulator periphery is stated, the rubber mat thickness is less than the clearance distance；
The periphery of the guide flange inner headed face of the main capacitor bottom insulator bottom corresponding thereto passes through rubber
Leather packing is connected.
7. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 6, it is characterised in that set
Outside the top of the insulator of the guide flange at the top of the main capacitor by the both sides of its inner headed face corresponding thereto
Disc both sides are flexibly connected；
The guide flange of the main capacitor bottom insulator corresponding thereto is arranged on to be flexibly connected.
8. a kind of equal potential shielded capacitor voltage transformer insulator as claimed in claim 1, it is characterised in that described
Insulator is installed in the circular groove at the pivot flange axis, the groove depth dimensions by insulator installation bolt highly
To determine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510920389.6A CN106872750A (en) | 2015-12-11 | 2015-12-11 | A kind of equal potential shielded capacitor voltage transformer insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510920389.6A CN106872750A (en) | 2015-12-11 | 2015-12-11 | A kind of equal potential shielded capacitor voltage transformer insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106872750A true CN106872750A (en) | 2017-06-20 |
Family
ID=59178180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510920389.6A Pending CN106872750A (en) | 2015-12-11 | 2015-12-11 | A kind of equal potential shielded capacitor voltage transformer insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106872750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716098A (en) * | 2019-10-25 | 2020-01-21 | 江苏祥源电气设备有限公司 | Composite insulator wet power frequency rain test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051429Y (en) * | 2007-06-18 | 2008-04-23 | 温州益坤电气有限公司 | A novel compound pole insulator for power engine |
| CN101609737A (en) * | 2009-07-20 | 2009-12-23 | 唐苑雯 | A kind of tensioning-type compound all-purpose insulator |
| CN201804696U (en) * | 2010-05-04 | 2011-04-20 | 中国电力科学研究院 | Ultra-high voltage isoelectric shielding CVT |
| CN104678155A (en) * | 2013-11-26 | 2015-06-03 | 国家电网公司 | Equipotential shielding capacitor type voltage transformer |
| CN104678145A (en) * | 2013-11-26 | 2015-06-03 | 国家电网公司 | Equipotential shielding capacitor type voltage transformer |
-
2015
- 2015-12-11 CN CN201510920389.6A patent/CN106872750A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201051429Y (en) * | 2007-06-18 | 2008-04-23 | 温州益坤电气有限公司 | A novel compound pole insulator for power engine |
| CN101609737A (en) * | 2009-07-20 | 2009-12-23 | 唐苑雯 | A kind of tensioning-type compound all-purpose insulator |
| CN201804696U (en) * | 2010-05-04 | 2011-04-20 | 中国电力科学研究院 | Ultra-high voltage isoelectric shielding CVT |
| CN104678155A (en) * | 2013-11-26 | 2015-06-03 | 国家电网公司 | Equipotential shielding capacitor type voltage transformer |
| CN104678145A (en) * | 2013-11-26 | 2015-06-03 | 国家电网公司 | Equipotential shielding capacitor type voltage transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716098A (en) * | 2019-10-25 | 2020-01-21 | 江苏祥源电气设备有限公司 | Composite insulator wet power frequency rain test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106872752B (en) | A kind of capacitance type potential transformer | |
| CN201804696U (en) | Ultra-high voltage isoelectric shielding CVT | |
| CN202307503U (en) | Electronic current and voltage combined transformer with high-voltage support pillar type suspension structure | |
| CN104681261B (en) | A kind of equal potential shielded capacitor voltage transformer | |
| CN101819868B (en) | Extra-high-voltage equal potential shielded capacitor voltage transformer | |
| CN103730247B (en) | A kind of full-shield high_voltage isolation type voltage transformer | |
| CN203250630U (en) | Capacitor voltage transformer electromagnetism unit intermediate transformer | |
| CN103575951B (en) | A kind of coupling capacitive divider of band electric potential gradient shielding | |
| CN101958190B (en) | Shielding and isolating voltage mutual inductor | |
| CN106872750A (en) | A kind of equal potential shielded capacitor voltage transformer insulator | |
| CN201282018Y (en) | Extra-high voltage capacitor voltage transformer | |
| CN202614820U (en) | Capacitance voltage divider used in gas insulated switchgear (GIS) | |
| CN104678155B (en) | A kind of equal potential shielded capacitor voltage transformer | |
| CN208672702U (en) | The capacitive voltage transformer of high pressure dry | |
| CN102998496B (en) | Series capacitor anti-interference layer structure and manufacturing method thereof | |
| CN103760395A (en) | Multiple-output electronic voltage transformer for GIS | |
| CN207264926U (en) | Dry type equalizing capacitor, dry-type capacitance divider and high-voltage mutual inductor | |
| CN207336610U (en) | A kind of capacitance voltage mutual inductor for carrying current monitoring function | |
| CN203774078U (en) | Multiple output electronic type current and voltage combined mutual inductor used for GIS (Gas Insulated Switchgear) | |
| CN104678145A (en) | Equipotential shielding capacitor type voltage transformer | |
| CN204228796U (en) | A kind of joint flange of equal potential shielded capacitor voltage transformer | |
| CN109358278A (en) | The scene extra-high voltage SF6 exchanges Insulation Test reactor | |
| CN104316740A (en) | Coupling capacitance voltage divider with shielding capacitor core | |
| CN105699726A (en) | Installation method of capacitor units of equipotential shielding capacitor voltage transformer | |
| CN205427013U (en) | Hierarchical formula voltage transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |