CN205427012U - Resistance -capacitance partial -voltage type voltage transformer - Google Patents
Resistance -capacitance partial -voltage type voltage transformer Download PDFInfo
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- CN205427012U CN205427012U CN201521000386.2U CN201521000386U CN205427012U CN 205427012 U CN205427012 U CN 205427012U CN 201521000386 U CN201521000386 U CN 201521000386U CN 205427012 U CN205427012 U CN 205427012U
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- 239000000725 suspension Substances 0.000 claims description 29
- 238000009413 insulation Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 4
- 230000005684 electric field Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 2
- 229910018503 SF6 Inorganic materials 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 6
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 6
- 229960000909 sulfur hexafluoride Drugs 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a resistance -capacitance partial -voltage type voltage transformer, including the high voltage electrode that the axis extends along upper and lower direction, high voltage electrode's inboard is provided with low -voltage electrode, and low -voltage electrode's inboard is provided with the telluric electricity field who sets up with the high voltage electrode coaxial line. Telluric electricity field, low -voltage electrode and high voltage electrode from interior to exterior coaxial line are arranged, are favorable to product compact structure, still are favorable to the distribution of electric field simultaneously.
Description
Technical field
This utility model relates to a kind of resistance-capacitance differential pressure type voltage transformer.
Background technology
In view of optical profile type voltage transformer technology is the most ripe, in intelligent substation process of construction, commonly used electromagnetic potential transformer adds the mode of electronics modular converter, the digital quantity signal needed for providing for intelligent substation.Resistance-capacitance differential pressure type voltage transformer is of paramount importance one big class in electromagnetic potential transformer, common resistance-capacitance differential pressure type voltage transformer has closed assembly condenser type and coaxial capacitance formula, it is little that resistance-capacitance differential pressure type voltage transformer possesses energy consumption, be conducive to the characteristic of power system reactive power balance, coaxial-type resistance-capacitance differential pressure type voltage transformer uses sulfur hexafluoride gas as internal major insulation medium simultaneously, there is insulating reliability high, the advantage of stable accuracy.
Existing resistance-capacitance differential pressure type voltage transformer such as Chinese patent CN201853571U is disclosed " a kind of voltage transformer based on capacitance-resistance voltage division principle ", including pressure vessel, high-field electrode it is provided with in pressure vessel, low-field electrode it is provided with inside high-field electrode, high-field electrode forms electric capacity with low-field electrode, it is additionally provided with on pressure vessel and high-field electrode, the vertically disposed ground electrode of low-field electrode, low-field electrode is provided with the pin configuration for being connected with corresponding resistor.During use, coupling resistance on the circuit between low-field electrode and ground electrode.Existing this resistance-capacitance differential pressure type voltage transformer there is a problem in that ground electrode is vertically arranged with high-field electrode, low-field electrode, causes whole product structure the compactest, and Electric Field Distribution is not very good；Single-sensor output can only be realized, be unfavorable for the stability of the measurement data measured.
Utility model content
The purpose of this utility model is to provide the resistance-capacitance differential pressure type voltage transformer of a kind of compact conformation.
In order to solve the problems referred to above, the technical solution of the utility model is:
Resistance-capacitance differential pressure type voltage transformer, including the high-field electrode that axis is vertically extending, the inner side of high-field electrode is provided with low-field electrode, and the inner side of low-field electrode is provided with the ground electrode being coaxially set with high-field electrode.
Low-field electrode has at least two, and each low-field electrode coaxial line is arranged, one of them low-field electrode is connected with described ground electrode, and remaining low-field electrode is provided with the pin configuration for being connected with corresponding resistor.
Low-field electrode is the tile like structure being coaxially set with ground electrode, and each low-field electrode is along the circumferentially-spaced layout of ground electrode.
Low-field electrode is the tubular construction being coaxially set with ground electrode, and each low-field electrode is spaced setting along the vertical direction.
The suspension electrode being coaxially set with high-field electrode, suspension electrode and high-field electrode, low-field electrode Insulation Coordination it is provided with between high-field electrode and low-field electrode.
Suspension electrode is coordinated with high voltage electrode insulation by the insulating gas between suspension electrode with high-field electrode, and suspension electrode is arranged on low-field electrode by realizing the insulating sleeve of suspension electrode and low-field electrode Insulation Coordination.
The interior table of described low-field electrode is exposed.
The beneficial effects of the utility model are: ground electrode, low-field electrode and high-field electrode coaxial line from the inside to the outside is arranged, beneficially product with compact structure also helps the distribution of electric field simultaneously.
Further, the low-field electrode of coaxial structure has multiple, and each low-field electrode can realize single channel, multichannel change of disease output flexibly；One of them low-field electrode is directly grounded, and can eliminate the impact on other low-field electrode place circuit of the transient state high pressure.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1 of the present utility model；
Fig. 2 be in this utility model A-A to sectional view；
Fig. 3 is the electrical schematic diagram of Fig. 1；
Fig. 4 is the electrical schematic diagram of embodiment 2 of the present utility model；
Fig. 5 is the electrical schematic diagram of embodiment 3 of the present utility model.
Detailed description of the invention
The embodiment 1 of resistance-capacitance differential pressure type voltage transformer is as shown in Figures 1 to 3: include pressure vessel 1, in pressure vessel, the most sequentially coaxially line is provided with high-field electrode 2, suspension electrode 3, low-field electrode and ground electrode 8, suspension electrode provides mechanical support for low-field electrode, ground electrode is solid bar structure (or hollow cylinder structure), high-field electrode realizes insulation with suspension electrode by its insulating gas therebetween, and the insulating gas in the present embodiment is sulfur hexafluoride gas.Low-field electrode has three, three low-field electrodes are respectively the first low-field electrode the 7, second low-field electrode 9 and the 3rd low-field electrode 6, three low-field electrode coaxial lines are arranged, low-field electrode is the tile like structure being coaxially set with ground electrode, the inner peripheral surface of low-field electrode is exposed, each low-field electrode, along the circumferentially-spaced layout of ground electrode, is all insulated by insulating gas between gap and low-field electrode and the ground electrode between adjacent low-field electrode, and insulating gas 5 is sulfur hexafluoride gas.Suspension electrode 3 is arranged on low-field electrode by realizing the insulating sleeve 4 of suspension electrode 3 and low-field electrode Insulation Coordination.Insulation fabric part is had to support between low-field electrode and ground electrode.First low-field electrode 7 is directly connected with ground electrode, the pin configuration for being connected it is provided with corresponding resistor on other two low-field electrode, pin configuration on low-field electrode be secondary output signal just, ground electrode is provided with the secondary output signal the most corresponding with secondary output signal bear.Fig. 1 middle term 10 represents transformer supporting leg.
During use, need to go here and there respectively between secondary output signal is just negative with corresponding secondary output signal and set resistance R1 and R2, its principle is as shown in Figure 3: high-field electrode forms Ca with suspension electrode, suspension electrode and each low-field electrode form Cb, C1 and C2 respectively, C1, C2 meet dual output needs, wherein Cb is directly connected with ground electrode, difference coupling resistance R1 and resistance R2 between C1, C2 and ground electrode.
In other embodiments of the present utility model: low-field electrode can also is that the tubular construction that axis is vertically extending, the most each low-field electrode are spaced setting along the vertical direction.
The embodiment 2 of resistance-capacitance differential pressure type voltage transformer is as shown in Figure 4: embodiment 2 is as different from Example 1, low-field electrode has two, one of them low-field electrode forms C3 with suspension electrode, another one low-field electrode forms C2 with suspension electrode, C3 is directly connected with ground electrode, and C2 needs coupling resistance R when using.The present embodiment can realize single output.
As a example by single output, i.e. low-field electrode divides subdivision to be two pieces, capacitance parameter between high-field electrode and suspension electrode is designated as C1, capacitance parameter between suspension electrode and the low-field electrode that earthing mode is resistance coupling grounding is designated as C2, suspension electrode and earthing mode are that the capacitance parameter between low-field electrode directly is designated as C3, then have:
Uo delayed phase Ui
AIS resistance-capacitance differential pressure type voltage transformer involved by this utility model is as it was previously stated, its change of disease stability depends mainly on C1, C2, C3, R parameter.For resistance parameter R, service precision is high, and the high-accuracy resistance of stability of characteristics can meet requirement.For C1, C2, C3, appropriate design high-field electrode, suspension electrode, ground electrode can realize electric lines of force along cylinder radial distribution, are as good as with endless coaxial capacitance calculation in terms of capacitance parameter.Therefore its capacitor theory computing formula is
A is coaxial capacitance internal diameter, b coaxial capacitance external diameter, εoFor permittivity of vacuum, εrFor dielectric relative dielectric constant, l is coaxial shape capacitor length, it is known that electric capacity stability withεo、εr, l be correlated with, high-field electrode, suspension electrode, low-field electrode use same material metal, it is ensured thatFor constant, between high-field electrode and suspension electrode, dielectric is sulfur hexafluoride gas, proves through correlation test, in the case of sulfur hexafluoride gas density is constant, sulfur hexafluoride gas dielectric constant is basicly stable, and its change is negligible for current transformer required precision.It it is insulating medium layer between suspension electrode and low-field electrode, its material can be engineering plastics or composite, selection relative dielectric constant is big, the material that dielectric strength is big makes, its structure is carried out rational Design on Plane, when ensureing external environment change, its integral capacitor parameter meets transformer measuring accuracy requirement.
Embodiment 3 of the present utility model is as shown in Figure 5: embodiment 3 is as different from Example 1, low-field electrode has at least four, to realize multi output, each low-field electrode forms C1～Cn with suspension electrode, and the resistance being connected between corresponding electric capacity and ground electrode is respectively R1～Rn.
Claims (7)
1. resistance-capacitance differential pressure type voltage transformer, including the high-field electrode that axis is vertically extending, the inner side of high-field electrode is provided with low-field electrode, it is characterised in that: the inner side of low-field electrode is provided with the ground electrode being coaxially set with high-field electrode.
Resistance-capacitance differential pressure type voltage transformer the most according to claim 1, it is characterized in that: low-field electrode has at least two, each low-field electrode coaxial line is arranged, one of them low-field electrode is connected with described ground electrode, and remaining low-field electrode is provided with the pin configuration for being connected with corresponding resistor.
Resistance-capacitance differential pressure type voltage transformer the most according to claim 2, it is characterised in that: low-field electrode is the tile like structure being coaxially set with ground electrode, and each low-field electrode is along the circumferentially-spaced layout of ground electrode.
Resistance-capacitance differential pressure type voltage transformer the most according to claim 2, it is characterised in that: low-field electrode is the tubular construction being coaxially set with ground electrode, and each low-field electrode is spaced setting along the vertical direction.
Resistance-capacitance differential pressure type voltage transformer the most according to claim 3, it is characterised in that: it is provided with the suspension electrode being coaxially set with high-field electrode, suspension electrode and high-field electrode, low-field electrode Insulation Coordination between high-field electrode and low-field electrode.
Resistance-capacitance differential pressure type voltage transformer the most according to claim 5, it is characterized in that: suspension electrode is coordinated with high voltage electrode insulation by the insulating gas between suspension electrode with high-field electrode, suspension electrode is arranged on low-field electrode by realizing the insulating sleeve of suspension electrode and low-field electrode Insulation Coordination.
7. according to the resistance-capacitance differential pressure type voltage transformer described in claim 1～6 any one, it is characterised in that: the interior table of described low-field electrode is exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521000386.2U CN205427012U (en) | 2015-12-04 | 2015-12-04 | Resistance -capacitance partial -voltage type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521000386.2U CN205427012U (en) | 2015-12-04 | 2015-12-04 | Resistance -capacitance partial -voltage type voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN205427012U true CN205427012U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521000386.2U Withdrawn - After Issue CN205427012U (en) | 2015-12-04 | 2015-12-04 | Resistance -capacitance partial -voltage type voltage transformer |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467185A (en) * | 2015-12-04 | 2016-04-06 | 国家电网公司 | A capacitance-resistance voltage-dividing type voltage transformer |
| CN107843760A (en) * | 2017-10-26 | 2018-03-27 | 武汉三龙天成电力设备有限公司 | A kind of facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type three |
-
2015
- 2015-12-04 CN CN201521000386.2U patent/CN205427012U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467185A (en) * | 2015-12-04 | 2016-04-06 | 国家电网公司 | A capacitance-resistance voltage-dividing type voltage transformer |
| CN107843760A (en) * | 2017-10-26 | 2018-03-27 | 武汉三龙天成电力设备有限公司 | A kind of facies tract zero sequence AC voltage sensor of resistance-capacitance differential pressure type three |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee after: Xuji Group Co., Ltd. Patentee after: State Grid Corporation of China Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: Xuji Group Co., Ltd. Patentee before: State Grid Corporation of China |
|
| CP01 | Change in the name or title of a patent holder | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20190326 |
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| AV01 | Patent right actively abandoned |