CN105467187A - A graded type voltage transformer - Google Patents
A graded type voltage transformer Download PDFInfo
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- CN105467187A CN105467187A CN201510886208.2A CN201510886208A CN105467187A CN 105467187 A CN105467187 A CN 105467187A CN 201510886208 A CN201510886208 A CN 201510886208A CN 105467187 A CN105467187 A CN 105467187A
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- metal level
- layer
- field electrode
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- insulation dielectric
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- 239000002184 metal Substances 0.000 claims abstract description 85
- 229910052751 metal Inorganic materials 0.000 claims abstract description 85
- 238000009422 external insulation Methods 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims description 12
- 238000007667 floating Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract 5
- 238000000034 method Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The invention relates to a graded type voltage transformer comprising an inner insulation dielectric layer and an external insulation dielectric layer which are arranged in a coaxial mode; the interior surface of the inner insulation dielectric layer is bonded with a first metal layer; the external surface of the insulation dielectric layer is bonded with a second metal layer; the interior surface of the external insulation dielectric layer is bonded with a third metal layer positioned on the outer side of the second metal layer; the external surface of the external insulation dielectric layer is bonded with a fourth metal layer; the second metal layer comprises at least one inner side low-voltage electrode; the third metal layer comprises an outer side low-voltage electrode which is the same with the inner side low-voltage electrode in terms of quantity; and the inner side low-voltage electrode is in short circuit with the outer side low-voltage electrode. According to the invention, problems that a continuous arranged structure of a metal layer, an insulation dielectric layer, a metal layer, an insulation dielectric layer and a metal layer has relatively high requirements for processing technology in the prior art are solved.
Description
Technical field
The present invention relates to a kind of stagewise voltage transformer (VT).
Background technology
Along with electric system is to Large Copacity, UHV (ultra-high voltage) and extra-high voltage future development; to power equipment miniaturization; intelligent; the requirement of high reliability is also more and more higher; national grid proposes the principle of two protection to intelligent grid 110KV and above power station measuring system; in order to meet current intelligent grid requirement, need that a kind of miniaturization, reliability are high, the much higher output type voltage transformer (VT) of precision badly.This type of voltage transformer (VT) existing is " GIS multi output electronic type voltage transformer " disclosed in Chinese patent CN203772925U, this voltage transformer (VT) comprises pressure vessel, Primary Conductor is provided with from the inside to the outside in pressure vessel, suspension cylindrical shell, the first metal layer, second metal level and the 3rd metal level, the first metal layer is attached on suspension electrode, second metal level comprises the low-field electrode of two tile structures, each low-field electrode is arranged along the circumferential interval of Primary Conductor, in being respectively arranged with between the first metal layer and the second metal level and between the second metal level and the 3rd metal level, external insulation dielectric layer.This voltage transformer (VT) adopts capacitance partial pressure structure; use Primary Conductor and suspension cylindrical shell as high-voltage capacitance; the coaxial metal Rotating fields separated with insulating is as low-voltage capacitance; collector is introduced in low-voltage capacitance side also upper resistance; after integration, amplification, double A/D conversion, be converted into light signal after intelligent acess merge cells synchronously processes on measuring and protecting equipment by photoelectric conversion device.Existing this stagewise voltage transformer (VT) existence is in problem: the technique arranging metal level at the surfaces externally and internally of an insulating medium layer more easily realizes, but metal level, insulating medium layer, metal level, insulating medium layer, metal level this being close to continuously arranges the more difficult realization of technique, processing technology requires high, be not easy to realize, cost is relatively high.
Summary of the invention
The object of the present invention is to provide a kind of stagewise voltage transformer (VT), to solve metal level in prior art, insulating medium layer, metal level, this structure that arranges continuously of insulating medium layer, metal level require higher problem to processing technology.
In order to solve the problem, technical scheme of the present invention is:
A kind of stagewise voltage transformer (VT), comprise the interior insulating medium layer and external insulation dielectric layer that are coaxially set, the inside surface of interior insulating medium layer has been sticked the first metal layer, the outside surface of interior insulating medium layer has been sticked the second metal level, the inside surface of external insulation dielectric layer is sticked the 3rd metal level be located at interval at outside the second metal level, the outside surface of external insulation dielectric layer has been sticked the 4th metal level, second metal level comprises low-field electrode inside at least one, 3rd metal level comprises and inner side low-field electrode number outside low pressure electrode one to one, inner side low-field electrode and corresponding outside low pressure electrode short circuit.
Insulating gel is filled with in gap between second metal level and the 3rd metal level.
The inner coaxial line of the first metal layer has been sticked floating potential cylinder, and the inner coaxial line of floating potential cylinder is provided with Primary Conductor.
First, second, third and fourth metal level is copper foil layer.
Inner side low-field electrode has at least two, inner side low-field electrode is the tile structure be coaxially set with interior insulating medium layer, outside low pressure electrode is the tile structure be coaxially set with external insulation dielectric layer, each inner side low-field electrode is arranged along the circumferential interval of interior insulating medium layer, and the gap between adjacent inboard low-field electrode is just corresponding with the gap between corresponding adjacent outer low-field electrode along the radial direction of interior insulating medium layer.
Beneficial effect of the present invention is: in the present invention, the first metal layer, the second metal level are attached on the inside and outside surface of interior insulating medium layer respectively, 3rd metal level, the 4th metal level are attached on the inside and outside surface of external insulation dielectric layer respectively, second metal level and the 3rd metal interlevel are every setting, the first metal layer, interior insulating medium layer and the second metal level is made to form a unit, 3rd metal level, external insulation dielectric layer and the 4th metal level also form a unit, each unit is all easy to processing, simplify product processing technique, reduce the cost of manufacture of product.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the present of invention;
Fig. 2 is that the A-A of Fig. 1 is to cut-open view;
Fig. 3 is the cooperation schematic diagram of inside and outside insulating medium layer and corresponding metal level in Fig. 2;
Fig. 4 is the electrical schematic diagram of Fig. 2.
Embodiment
A kind of embodiment of stagewise voltage transformer (VT) is as shown in figures 1-4: comprise pressure vessel 10, Primary Conductor 1 is provided with in pressure vessel 10, the outside of Primary Conductor has been coaxially set floating potential cylinder 2, interior insulating medium layer 4 and external insulation dielectric layer 8, the inside surface of interior insulating medium layer 4 has been sticked the first metal layer 3, floating potential cylinder provides mechanical support for each metal level, the inside surface of the first metal layer 3 is attached on floating potential cylinder 2, and the outside surface of interior insulating medium layer 4 is sticked the second metal level 5.The inside surface of external insulation dielectric layer 8 is sticked the 3rd metal level 7 be positioned at outside the second metal level, and the outside surface of external insulation dielectric layer has been sticked the 4th metal level the 9, four metal level 9 ground connection.Second metal level comprises two inner side low-field electrodes, inner side low-field electrode is the tile structure be coaxially set with interior insulating medium layer, 3rd metal level comprises and inner side low-field electrode number outside low pressure electrode one to one, outside low pressure electrode is the tile structure be coaxially set with external insulation dielectric layer, each inner side low-field electrode passes through electric conductor 11 short circuit with corresponding outside low pressure electrode respectively, and the gap 12 between adjacent inboard low-field electrode is positive corresponding with the gap 13 between adjacent outer low-field electrode along the radial direction of interior insulating medium layer.Be filled with insulating gel 6 between second metal level and the 3rd metal level, insulating gel can play the effect insulated from each other of adjacent inboard low-field electrode, adjacent outer low-field electrode, and insulating gel can also play the effect ensureing Total Product intensity.In the present embodiment, each metal level is copper foil layer.
Adopt insulating gas (such as sulfur hexafluoride) to insulate between Primary Conductor and floating potential cylinder, it forms high-voltage capacitance therebetween, bears Primary Conductor to pressure vessel earth potential pressure drop major part.Between the first metal layer, the second metal level and the 3rd metal level, form two-stage electric capacity respectively between the 4th metal level, two-stage electric capacity is combined by insulating gel.Independent on two-stage capacitance structure, processing technology is consistent, and inside and outside insulating medium layer is high tenacity, high insulating property ability.During use between outside low-field electrode with the 4th metal level build-out resistor in parallel, connect voltage acquisition unit by shielded cable, voltage acquisition unit is installed in the closed metal housing outside pressure vessel, can avoid the interference of external electromagnetic field.
As shown in Figure 4: Primary Conductor outside surface and floating potential cylinder are near Primary Conductor side surface capacitance parameter C
1, capacitance parameter C between the first metal layer 3 and the second metal level 5 each inner side low-field electrode
2a, capacitance parameter C between the 4th metal level 9 and the 3rd metal level each outside low pressure electrode 7
2b, can draw according to coaxial capacitance computing formula, repeat no more herein.Build-out resistor R
pcomputing formula is as follows:
In formula:
n is the number of inner side low-field electrode.
According to formula (1), known output valve is
build-out resistor R can be asked
p.
In other embodiments of the invention: the number of inner side low-field electrode can also be one, three or other number; Also insulate by filling insulating gas between second metal level and the 3rd metal level; Inner side low-field electrode, outside low pressure electrode can also be the tubular constructions be coaxially set with corresponding insulating medium layer, and now each low-field electrode is arranged at interval vertically.
Claims (5)
1. a stagewise voltage transformer (VT), comprise the interior insulating medium layer and external insulation dielectric layer that are coaxially set, it is characterized in that: the inside surface of interior insulating medium layer has been sticked the first metal layer, the outside surface of interior insulating medium layer has been sticked the second metal level, the inside surface of external insulation dielectric layer is sticked the 3rd metal level be located at interval at outside the second metal level, the outside surface of external insulation dielectric layer has been sticked the 4th metal level, second metal level comprises low-field electrode inside at least one, 3rd metal level comprises and inner side low-field electrode number outside low pressure electrode one to one, inner side low-field electrode and corresponding outside low pressure electrode short circuit.
2. stagewise voltage transformer (VT) according to claim 1, is characterized in that: be filled with insulating gel in the gap between the second metal level and the 3rd metal level.
3. stagewise voltage transformer (VT) according to claim 1, is characterized in that: the inner coaxial line of the first metal layer has been sticked floating potential cylinder, and the inner coaxial line of floating potential cylinder is provided with Primary Conductor.
4. stagewise voltage transformer (VT) according to claim 1, is characterized in that: first, second, third and fourth metal level is copper foil layer.
5. the stagewise voltage transformer (VT) according to Claims 1 to 4 any one, it is characterized in that: inner side low-field electrode has at least two, inner side low-field electrode is the tile structure be coaxially set with interior insulating medium layer, outside low pressure electrode is the tile structure be coaxially set with external insulation dielectric layer, each inner side low-field electrode is arranged along the circumferential interval of interior insulating medium layer, and the gap between adjacent inboard low-field electrode is just corresponding with the gap between corresponding adjacent outer low-field electrode along the radial direction of interior insulating medium layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886208.2A CN105467187B (en) | 2015-12-04 | 2015-12-04 | A kind of stagewise voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886208.2A CN105467187B (en) | 2015-12-04 | 2015-12-04 | A kind of stagewise voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN105467187A true CN105467187A (en) | 2016-04-06 |
| CN105467187B CN105467187B (en) | 2018-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11740261B2 (en) | 2016-10-14 | 2023-08-29 | G & W Electric Company | Capacitive voltage sensor assembly |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201800004114A1 (en) | 2018-03-30 | 2019-09-30 | Green Seas Ventures Ltd C/O Citco B V I Ltd | CONSTRUCTION SYSTEM WITH A CAPACITIVE VOLTAGE SENSOR |
| EP3899557A4 (en) | 2018-12-17 | 2022-10-26 | G & W Electric Company | Electrical sensor assembly |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4423469A1 (en) * | 1994-07-05 | 1996-01-11 | Elektrische Automatisierungs U | Capacitive displacement measuring system used for non-contact position and vibration measurement at rotors in radial direction |
| CN201134346Y (en) * | 2007-12-29 | 2008-10-15 | 武汉格蓝若光电互感器有限公司 | Novel high-voltage independent electronic voltage mutual inductor |
| CN202384166U (en) * | 2011-11-10 | 2012-08-15 | 许继集团有限公司 | Three-phase common-box GIS electronic-type voltage-current combined mutual inductor |
| CN103208360A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic-type current-voltage-combined transformer for GIS (gas insulated switchgear) |
| CN103208359A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic current and voltage combined transformer for support column type gas insulation |
| CN103760395A (en) * | 2014-01-02 | 2014-04-30 | 国家电网公司 | Multiple-output electronic voltage transformer for GIS |
| CN203772925U (en) * | 2014-01-02 | 2014-08-13 | 国家电网公司 | Multi-output electronic voltage transformer for GIS (geographic information system) |
| CN105467185A (en) * | 2015-12-04 | 2016-04-06 | 国家电网公司 | A capacitance-resistance voltage-dividing type voltage transformer |
| CN205427013U (en) * | 2015-12-04 | 2016-08-03 | 国家电网公司 | Hierarchical formula voltage transformer |
-
2015
- 2015-12-04 CN CN201510886208.2A patent/CN105467187B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4423469A1 (en) * | 1994-07-05 | 1996-01-11 | Elektrische Automatisierungs U | Capacitive displacement measuring system used for non-contact position and vibration measurement at rotors in radial direction |
| CN201134346Y (en) * | 2007-12-29 | 2008-10-15 | 武汉格蓝若光电互感器有限公司 | Novel high-voltage independent electronic voltage mutual inductor |
| CN202384166U (en) * | 2011-11-10 | 2012-08-15 | 许继集团有限公司 | Three-phase common-box GIS electronic-type voltage-current combined mutual inductor |
| CN103208360A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic-type current-voltage-combined transformer for GIS (gas insulated switchgear) |
| CN103208359A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic current and voltage combined transformer for support column type gas insulation |
| CN103760395A (en) * | 2014-01-02 | 2014-04-30 | 国家电网公司 | Multiple-output electronic voltage transformer for GIS |
| CN203772925U (en) * | 2014-01-02 | 2014-08-13 | 国家电网公司 | Multi-output electronic voltage transformer for GIS (geographic information system) |
| CN105467185A (en) * | 2015-12-04 | 2016-04-06 | 国家电网公司 | A capacitance-resistance voltage-dividing type voltage transformer |
| CN205427013U (en) * | 2015-12-04 | 2016-08-03 | 国家电网公司 | Hierarchical formula voltage transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11740261B2 (en) | 2016-10-14 | 2023-08-29 | G & W Electric Company | Capacitive voltage sensor assembly |
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| CN105467187B (en) | 2018-05-22 |
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