CN204228796U - A kind of joint flange of equal potential shielded capacitor voltage transformer - Google Patents
A kind of joint flange of equal potential shielded capacitor voltage transformer Download PDFInfo
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- CN204228796U CN204228796U CN201420712816.2U CN201420712816U CN204228796U CN 204228796 U CN204228796 U CN 204228796U CN 201420712816 U CN201420712816 U CN 201420712816U CN 204228796 U CN204228796 U CN 204228796U
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- 239000003990 capacitor Substances 0.000 title claims abstract description 96
- 239000012212 insulator Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Abstract
The utility model relates to a kind of joint flange of equal potential shielded capacitor voltage transformer, this joint flange is installed on the two ends of the container unit that often economizes on electricity, its end face is designed with O type circle seal groove, is equipped with the O type circle of dimension, achieves the sealing of capacitor unit.This joint flange Center has circular hole, and main capacitance supporting insulator inserts circular hole in a vertical manner, is realized the double-deck positiver sealing of this place's node by the radial O type circle Seal Design on end face axial O type circle herein and medial surface.The joint flange that the utility model provides successfully solves capacitor unit assembling, deposits and seal a difficult problem, while meeting requirement of mechanical strength, achieves again the electrical connection of capacitor unit internal shield capacitor as electrode.
Description
Technical field
The utility model relates to a kind of electric system transformer device, specifically relates to a kind of joint flange of equal potential shielded capacitor voltage transformer.
Background technology
Along with extra-high voltage (exchange 1000kV and the more than) application of technology of transmission of electricity in engineering, need Measurement accuracy extra-high voltage grid voltage and corresponding technical equipment.The power frequency high voltage meter of electric system widespread use mainly contains electromagnetic potential transformer and capacitance type potential transformer two kinds (both all belong to passive voltage measurement system), substantially can meet the requirement of 500kV and following electric pressure voltage measurement and relay protection.Belong to the Optical Potential Transformer of active voltage measuring system, electronic type voltage transformer to be also at present in research and development and trial run process, need research and solve further problems such as voltage measurement accuracy, laser life-span, system reliabilities.
Due to the difficulty that insulate, so electromagnetic potential transformer seldom adopts in the electrical network of ultra-high/extra-high voltage grade.Because capacitance type potential transformer (CVT) structure is simple, reliability is high, cost is lower, be still the major equipment of ultra-high/extra-high voltage level Grid voltage measurement.But in extra-high voltage grid, there is following technical difficulty in the design ap-plication of domestic and international existing CVT:
1) stray capacitive currents affects accuracy of measurement:
Traditional capacitance type potential transformer (CVT), owing to there is stray capacitance between capacitive divider high-voltage arm and grounding body around or electrified body, under action of high voltage, stray capacitive currents flows out or flows into high-voltage arm, causes voltage measurement error.This error strengthens along with increasing of electric pressure.NORTHWEST CHINA 750kV electrical network capacitance type potential transformer measured result, the measuring error that stray current (comprising capacitance current and insulation sleeve surface leakage current) causes can up to more than 0.2%.Electric Field Simulation shows, the CVT of 1000kV, and the capacitance current flowing into the earth from voltage divider high-voltage arm can reach 20mA, causes significant measuring error.The measure of usual employing increasing voltage divider main capacitance amount reduces the impact of stray current, even if but electric capacity increases to 10000pf, the class of accuracy also difficult standard reaching 0.1 grade of extra-high voltage CVT.
2) on-the-spot effect difficulty:
Existing CVT measuring error is by stray capacitance influences, thus relevant with installation site.After the CVT of ultra-high/extra-high voltage electric pressure installs at the scene, need to carry out on-the-spot effect, to revise the ratio and angular difference that measure when dispatching from the factory.The on-the-spot effect of carrying out mutual inductor at ultra-high voltage transformer station is by no means easy.Except extra-high voltage reference capacitor manufacture difficulty, the on-the-spot electromagnetic interference (EMI) of ultra-high voltage transformer station is also the important restriction factor carrying out on-the-spot accurately effect comparison.
3) CVT response characteristic problem:
The response characteristic of widespread use to voltage transformer (VT) of digital relay protection system proposes more and more higher requirement, requires that transformer secondary voltage quick and precisely should reflect the change of primary voltage.Respective rules requirement, after transformer primary shorted to earth, secondary voltage should be down to less than 0.1 of initial value within 0.2 second.The ferroresonance damper that existing CVT all adopts energy-storage travelling wave tube to form, to suppress issuable ferroresonance in electromagnetic unit.The introducing of energy-storage travelling wave tube makes the response characteristic of mutual inductor be deteriorated, and is difficult to the requirement meeting extra-high voltage grid relay protection quick and precisely action.
For this series of problem, propose equal potential shielded capacitor voltage transformer, this mutual inductor has high precision, responds, exempts from the feature of on-the-spot effect fast.Equal potential shielded capacitor voltage transformer has unique structure compared to traditional C VT, by carrying out reasonable computation and Design of Mechanical Structure to equal potential shielded capacitor voltage transformer to meet the requirements such as electric, the physical strength of equivalent potential screen CVT.How realizing the equal potential shielded capacitor voltage transformer assembling of respectively economizing on electricity between container unit is a difficult problem.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of joint flange of equal potential shielded capacitor voltage transformer, successfully solve capacitor unit assembling, deposit and seal a difficult problem, while meeting requirement of mechanical strength, achieve again the electrical connection of capacitor unit internal shield capacitor as electrode.
The purpose of this utility model adopts following technical proposals to realize:
The utility model provides a kind of joint flange of equal potential shielded capacitor voltage transformer, described equal potential shielded capacitor voltage transformer comprises equivalent potential screen capacitor unit, its improvements are, described joint flange is installed on the two ends of equivalent potential screen capacitor unit, and axial vertical with equivalent potential screen capacitor unit.
Further, described equivalent potential screen capacitor unit comprises that be arranged between upper and lower described joint flange, coaxial successively from inside to outside main capacitor, interior insulating material, ring electrode and insulating sleeve; Described main capacitor upper and lower side is equipped with the supporting insulator be connected with described joint flange, and described supporting insulator is positioned on the axle center of described insulating sleeve;
Top and the bottom of described insulating sleeve are respectively equipped with the sleeve flange be connected with described joint flange; Several auxiliary capacitors are arranged symmetrically with along insulating sleeve inwall circumference between upper and lower described ring electrode; Described auxiliary capacitor is connected with described ring electrode with nut by stud, and described stud extends through the described joint flange of described auxiliary capacitor to its correspondence; Described stud is provided with spring.
Further, have certain distance between the described pivot flange that described stud end face is corresponding with it, described certain distance is at least greater than described auxiliary capacitor axial expansion amount.
Further, the bottom of described auxiliary capacitor is connected with described joint flange by nut.
Further, described supporting insulator comprises Mume flower contact assembly, the circular hole coaxial at described Mume flower contact assembly and joint flange center to.
Further, described joint flange center is provided with the homoaxial circular hole with supporting insulator, and described supporting insulator vertically inserts in circular hole.
Further, the end face of described joint flange is provided with O type circle seal groove, with the O type circle of the axial O type circle of joint flange and the vertical with axial direction of supporting insulator with the use of, realize the sealing of capacitor unit.
Further, the O type circle of the axial O type circle of described joint flange and the vertical with axial direction of main capacitance supporting insulator with the use of, realize the double-layer seal of node.
Further, the O type circle vertical with axial direction of described supporting insulator is positioned on the medial surface of supporting insulator.
Further, described joint flange by as capacitor unit internal shield electrode for capacitors, concerning single-unit equivalent potential screen capacitor unit, is all pressed for the ring electrode shielded in equivalent potential screen capacitor unit; Concerning adjacent equivalent potential screen capacitor unit for connecting electrode, electrically the upper screened condenser assembly connected in equivalent potential screen capacitor unit (comprises that be arranged between upper and lower described joint flange, coaxial successively from inside to outside main capacitor, interior insulating material, ring electrode and insulating sleeve; Top and the bottom of described insulating sleeve are respectively equipped with the sleeve flange be connected with described joint flange; Auxiliary capacitor is provided with) between described ring electrode upper and lower side and the joint flange corresponding with its upper and lower side.
Compared with the prior art, the beneficial effect that the utility model reaches is:
The joint flange that the utility model provides achieve to equal potential shielded capacitor voltage transformer CVT reasonable, safe, fast install.The planform of each parts of capacitance type potential transformer CVT, material properties, intensity, electric property is fully taken into account in installation process, select rational installation steps, parts connected mode cleverly, and avoid using large complicated Work tool thus make that installment work is simpler and more direct, safety.Achieve the aspect functions such as screened condenser is all pressed, is electrically connected, capacitor unit sealing, storage.Meet the aspect requirements such as the design of mutual inductor electric field, physical strength, antidetonation, front face area.This joint flange integrates several functions, and holding structure is simple simultaneously, with low cost.
The joint flange that the utility model provides successfully solves capacitor unit assembling, deposits and seal a difficult problem, while meeting requirement of mechanical strength, achieves again the electrical connection of capacitor unit internal shield capacitor as electrode.
Accompanying drawing explanation
Fig. 1 is equal potential shielded capacitor voltage transformer structural representation;
Fig. 2 is that the equivalent potential screen capacitor unit of B in Fig. 1 is interconnected amplification axial section;
Fig. 3 is the joint flange scheme of installation of the equal potential shielded capacitor voltage transformer that the utility model provides; Wherein: A-equal potential shielded capacitor voltage transformer, B-equivalent potential screen capacitor unit, 1-main capacitor, 2-insulating sleeve, 3-auxiliary capacitor, 4-ring electrode, 5-supporting insulator, 6-joint flange; 7-sleeve flange.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
The joint flange of a kind of capacitor unit for equal potential shielded capacitor voltage transformer that the utility model provides, also known as end part seal flange.Described equal potential shielded capacitor voltage transformer comprises equivalent potential screen capacitor unit, and described joint flange is installed on the two ends of equivalent potential screen capacitor unit, and axial vertical with equivalent potential screen capacitor unit.
Equivalent potential screen capacitor unit comprises that be arranged between upper and lower described joint flange, coaxial successively from inside to outside main capacitor, interior insulating material, ring electrode and insulating sleeve; Described main capacitor upper and lower side is equipped with the supporting insulator be connected with described joint flange, and described supporting insulator is positioned on the axle center of described insulating sleeve; Top and the bottom of described insulating sleeve are respectively equipped with the sleeve flange be connected with described joint flange; Auxiliary capacitor is provided with between described ring electrode upper and lower side and the joint flange corresponding with its upper and lower side.Several auxiliary capacitors are arranged symmetrically with along insulating sleeve inwall circumference between upper and lower described ring electrode; Described auxiliary capacitor is connected with described ring electrode with nut by stud, and described stud extends through the described joint flange of described auxiliary capacitor to its correspondence; Described stud is provided with spring.Have certain distance between the described pivot flange that stud end face is corresponding with it, described certain distance is at least greater than described auxiliary capacitor axial expansion amount.The bottom of auxiliary capacitor is connected with described joint flange by nut.
In equal potential shielded capacitor voltage transformer structural representation and Fig. 1, the equivalent potential screen capacitor unit of B is interconnected and amplifies axial section respectively as illustrated in fig. 1 and 2.
As shown in Figure 3, this joint flange is installed on the two ends of the container unit that often economizes on electricity to the scheme of installation of joint flange, its end face is designed with O type circle seal groove, is equipped with the O type circle of dimension, achieves the sealing of capacitor unit.Joint flange center is provided with the homoaxial circular hole with supporting insulator, and described supporting insulator vertically inserts in circular hole.The double-deck positiver sealing of this place's node is realized by radial O type circle (with the O type circle on the axially vertical direction) Seal Design on end face axial O type circle herein and medial surface.Rational structural design makes its installment work simple and safe.
After supporting insulator and this joint flange install; guarantee that the low end face of supporting insulator can not exceed the low end face of joint flange by reasonably designing, thus ensure that depositing of single-unit capacitor unit requires and play a protective role to supporting insulator and internal electrode.
This joint flange is simultaneously by the electrode as capacitor unit internal shield capacitor, and concerning single-unit capacitor unit, it serves all pressures effect for screened condenser electrode; Concerning neighboring capacitors unit, it serves the effect of connecting electrode, and electrically the upper screened condenser assembly connected in each economize on electricity container unit (comprises that be arranged between upper and lower described joint flange, coaxial successively from inside to outside main capacitor, interior insulating material, ring electrode and insulating sleeve; Top and the bottom of described insulating sleeve are respectively equipped with the sleeve flange be connected with described joint flange; Auxiliary capacitor is provided with) between described ring electrode upper and lower side and the joint flange corresponding with its upper and lower side.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; although be described in detail the utility model with reference to above-described embodiment; those of ordinary skill in the field still can modify to embodiment of the present utility model or equivalent replacement; these do not depart from any amendment of the utility model spirit and scope or equivalent replacement, are all applying within the claims of the present utility model awaited the reply.
Claims (10)
1. the joint flange of an equal potential shielded capacitor voltage transformer, described equal potential shielded capacitor voltage transformer comprises equivalent potential screen capacitor unit, it is characterized in that, described joint flange is installed on the two ends of equivalent potential screen capacitor unit, and axial vertical with equivalent potential screen capacitor unit supporting insulator.
2. joint flange as claimed in claim 1, it is characterized in that, described equivalent potential screen capacitor unit comprises that be arranged between upper and lower described joint flange, coaxial successively from inside to outside main capacitor, interior insulating material, ring electrode and insulating sleeve; Described main capacitor upper and lower side is equipped with the supporting insulator be connected with described joint flange, and described supporting insulator is positioned on the axle center of described insulating sleeve;
Top and the bottom of described insulating sleeve are equipped with the sleeve flange be connected with described joint flange; Several auxiliary capacitors are arranged symmetrically with along insulating sleeve inwall circumference between upper and lower described ring electrode; Described auxiliary capacitor is connected with described ring electrode with nut by stud, and described stud extends through the described joint flange of described auxiliary capacitor to its correspondence; Described stud is provided with spring.
3. joint flange as claimed in claim 2, it is characterized in that there is certain distance between the described pivot flange that described stud end face is corresponding with it, described certain distance is at least greater than described auxiliary capacitor axial expansion amount.
4. joint flange as claimed in claim 3, it is characterized in that, the bottom of described auxiliary capacitor is connected with described joint flange by nut.
5. joint flange as claimed in claim 1 or 2, it is characterized in that, described supporting insulator comprises Mume flower contact assembly, the circular hole coaxial at described Mume flower contact assembly and joint flange center to.
6. joint flange as claimed in claim 1, it is characterized in that, described joint flange center is provided with the homoaxial circular hole with supporting insulator, and described supporting insulator vertically inserts in circular hole.
7. joint flange as claimed in claim 1, it is characterized in that, the end face of described joint flange is provided with O type circle seal groove, with the O type circle of the axial O type circle of joint flange and the vertical with axial direction of supporting insulator with the use of, realize the sealing of capacitor unit.
8. joint flange as claimed in claim 7, is characterized in that, the O type circle of the axial O type circle of described joint flange and the vertical with axial direction of supporting insulator with the use of, realize the double-layer seal of node.
9. joint flange as claimed in claim 8, it is characterized in that, the O type circle vertical with axial direction of described supporting insulator is positioned on the medial surface of supporting insulator.
10. joint flange as claimed in claim 1, it is characterized in that, described joint flange by as capacitor unit internal shield electrode for capacitors, concerning single-unit equivalent potential screen capacitor unit, is all pressed for the ring electrode shielded in equivalent potential screen capacitor unit; Concerning adjacent equivalent potential screen capacitor unit for connecting electrode, the electrically upper screened condenser assembly connected in equivalent potential screen capacitor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420712816.2U CN204228796U (en) | 2014-11-24 | 2014-11-24 | A kind of joint flange of equal potential shielded capacitor voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420712816.2U CN204228796U (en) | 2014-11-24 | 2014-11-24 | A kind of joint flange of equal potential shielded capacitor voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN204228796U true CN204228796U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420712816.2U Active CN204228796U (en) | 2014-11-24 | 2014-11-24 | A kind of joint flange of equal potential shielded capacitor voltage transformer |
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| CN (1) | CN204228796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872751A (en) * | 2015-12-11 | 2017-06-20 | 国网智能电网研究院 | A kind of equivalent-circuit model of equal potential shielded capacitor voltage transformer |
-
2014
- 2014-11-24 CN CN201420712816.2U patent/CN204228796U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872751A (en) * | 2015-12-11 | 2017-06-20 | 国网智能电网研究院 | A kind of equivalent-circuit model of equal potential shielded capacitor voltage transformer |
| CN106872751B (en) * | 2015-12-11 | 2020-11-03 | 国网智能电网研究院 | Equivalent circuit model of equipotential shielding capacitor voltage transformer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170601 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: China-EPRI Electric Power Engineering Co., Ltd. Patentee after: State Grid Corporation of China Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: State Grid Smart Grid Institute Patentee before: State Grid Corporation of China Co-patentee before: China-EPRI Electric Power Engineering Co., Ltd. |