CN103762067A - Gas-insulated multiple-output electronic post-type current-voltage combined transformer - Google Patents
Gas-insulated multiple-output electronic post-type current-voltage combined transformer Download PDFInfo
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- CN103762067A CN103762067A CN201410001588.2A CN201410001588A CN103762067A CN 103762067 A CN103762067 A CN 103762067A CN 201410001588 A CN201410001588 A CN 201410001588A CN 103762067 A CN103762067 A CN 103762067A
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Abstract
The invention relates to a gas-insulated multiple-output electronic post-type current-voltage combined transformer comprising an upper end high-voltage barrel and a lower end combined insulator sleeve. A coaxial capacitive voltage transformer of the combined transformer comprises a voltage-equalizing shield barrel (1), a floating potential tube (6), and a low-voltage capacitive structure; the voltage-equalizing shield barrel (1) and the floating potential tube (6) are disposed in the combined insulator sleeve; the low-voltage capacitive structure is disposed within the floating potential tube (6). The gas-insulated multiple-output electronic post-type current-voltage combined transformer is characterized in that the low-voltage capacitive structure is at least provided with a first metal layer (7), a second metal layer (9), and a third metal layer (11) sequentially from outside to inside; insulating medium is arranged between each two metal layers; the first metal layer (7) is connected to the inner wall of the floating potential tube (6); the second metal layer (9) is in a split structure. The gas-insulated multiple-output electronic post-type current-voltage combined transformer has the function of multiple-output multiple protection, such as dual-output dual protection, and has the advantages of small size, high disturbance resistance, high precision, high reliability, low cost and the like.
Description
Technical field
The present invention relates to a kind of gas-insulated and export electronic type pillar current/voltage combination transformer more.
Background technology
Current gas-insulated column support type electronic voltage mutual induction device (comprising the voltage transformer in combination transformer equipment); mostly be capacitance partial pressure structure; use the coaxial configuration of primary shielding cover and suspension cylindrical shell as high-voltage capacitance; by the coaxial metal layer structure of dielectric as low-voltage capacitance; low-voltage capacitance side upper resistance introduces collector, after integration, amplification, double A/D conversion, by photoelectric conversion device be converted into light signal after synchronous processing of optical fiber access merge cells to measuring and protecting equipment.
As disclosed in patent documentations such as CN202307504U, Primary Conductor, high pressure cylindrical shell are located at upper end, and coaxial capacitive voltage divider is located in the composite insulator sleeve pipe of lower end, and composite insulator sleeve pipe is fixed on base.All press shielding cylinder and high pressure cylindrical shell equipotential, with all pressing inwall on the floating potential pipe of the coaxial setting of shielding cylinder, metal level and insulating barrier are set, form coaxial capacitance structure.For combination transformer, electronic current mutual inductor is located in high pressure cylindrical shell.
Current problem is, along with electric power system is to large capacity, and superhigh pressure and ultra high voltage future development, to power equipment miniaturization, intellectuality, the requirement of high reliability is also more and more higher, and national grid has proposed the principle of two protections to the above power station of intelligent grid 110KV level measuring system; So need a kind of combination transformer of many outputs badly.
Summary of the invention
The object of this invention is to provide a kind of gas-insulated and export electronic type pillar current/voltage combination transformer more, in order to solve the current problem that there is no to export combination transformer more.
For achieving the above object, the solution of the present invention comprises:
Gas-insulated is exported an electronic type pillar current/voltage combination transformer more, comprises the high pressure cylindrical shell of upper end and the composite insulator sleeve pipe of lower end; The voltage transformer of the coaxial capacitance formula of described combination transformer comprises: be located at the low-voltage capacitance structure that all pressures shielding cylinder (1), floating potential pipe (6) and floating potential pipe (6) inner side in composite insulator sleeve pipe arrange, described low-voltage capacitance structure at least ecto-entad is provided with the first metal layer (7), the second metal level (9) and the 3rd metal level (11) successively, between each metal level, is provided with dielectric; Described the first metal layer (7) connects floating potential pipe (6) inwall, and the second metal level (9) is split-type structural.
Described the second metal level (9) radial segments, is comprised of at least two watts of shape structures.
Described the second metal level (9) axial segmentation setting.
Described the second metal level (9) axial segmentation setting.
Described the 3rd metal level (11) ground connection, each split block of the second metal level connects respectively the corresponding output of described voltage transformer.
Each split block size of described the second metal level (9), shape are identical.
Described electronic current mutual inductor is located in described high pressure cylindrical shell, comprises that at least two for being located in the Luo-coil (4) in Primary Conductor, and Luo-coil is arranged in metal shell (5).
Between described the first metal layer and the 3rd metal level, be parallel with build-out resistor.
The described edge, shielding cylinder lower end of all pressing is lower than edge, floating potential pipe lower end; Edge, floating potential pipe upper end is higher than the edge, upper end of first, second, third metal level, and edge, floating potential pipe lower end is lower than the edge, lower end of first, second, third metal.
Coaxial capacitive voltage divider comprises floating potential pipe, and the coaxial ecto-entad of floating potential pipe at least arranges the first metal layer 7, the second metal level 9, the three metal levels 11.By adjusting the second metal level 9 shapes, structure; be set to split-type structural; by some split blocks, formed; splitting method comprises axial segmentation; be divided into some tubular constructions; or radial segments; be divided into some watts of shape structures; or be not only axial segmentation but also radial segments; the 3rd metal level is all connected corresponding voltage transformer port by shielded type cable with each split block; each split block and the 3rd metal interlevel are as a sensing head interface, thereby realize, voltage transformer is exported more, many defencive functions.Defencive functions as two in dual output.
By the Luo-coil of configuration suitable number, also can realize the function more current sense is exported, protected more.
The concrete miniaturization of combination transformer of the present invention, high anti-interference, high accuracy, the advantages such as high reliability, low cost.
Accompanying drawing explanation
Fig. 1 is gas insulation minor pillar current/voltage combination transformer overall structure figure;
Fig. 2 is the local I view of Fig. 1, is voltage transformer low-voltage capacitance metal layering schematic diagram;
Fig. 3 is coaxial capacitance mechanism principle figure;
Fig. 4 is capacitance-resistance dividing potential drop electrical schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Be illustrated in figure 1 a kind of gas-insulated shown in the present and export electronic type pillar current/voltage combination transformer more, upper end is high pressure cylindrical shell 3, wherein wears Primary Conductor, and lower end is composite insulator sleeve pipe and base portion (12).Similarly to the prior art, the coaxial differential pressure device structure of its column support type also comprises high-voltage capacitance part and low-voltage capacitance part, and high-voltage capacitance is partly by high pressure cylindrical shell 3, all press shielding cylinder 1 etc. to form, and improvement of the present invention is low-voltage capacitance part.
As shown in Figure 2, floating potential pipe 6 inner sides, ecto-entad is coaxially arranged with the first metal layer 7, the first solid dielectric insulation layer 8, the second metal level 9, the second solid dielectric insulation layer 10 and the 3rd metal level 11 successively; The first metal layer 7 is close to floating potential pipe 6 inwalls, and the second metal level 9 is split-type structural.
Above-mentioned split-type structural, as a kind of execution mode, as shown in Figure 3, the second metal level 9 radial segments, are comprised of two watts of shape structures.In order to realize many output, also can adopt three or three the second metal levels that above watt shape structure forms.First, second solid dielectric insulation layer that is filled into the solid insulating material formation of metal interlevel is communicated with by the gap between the second metal level split block.
As another kind of execution mode, the second metal level 9 axial segmentation settings, can be divided into a plurality of tubular constructions (accompanying drawing does not draw).
As further execution mode, the second metal level 9 not only axial segmentation but also radial segments, its cross section still can be with reference to Fig. 3.
In above embodiment, for the ease of measuring, calculating, each split block is big or small, shape is identical, in the electrical parameter calculation of Fig. 4, selects two Split type structures, and two split block electric parameters are identical.
Each split block of the second metal level and the 3rd metal level form instrument transformer output port, via high shielding properties cable, conduct to collecting unit, thereby realize the many protections of many output.The 3rd metal level is ground metal layer.
All press shielding cylinder 1 and high pressure cylindrical shell 3 upper end closeds, edge, lower end, lower than floating potential pipe 6 edges, lower end, forms external electric field shielding; Edge, floating potential pipe upper end is higher than first, second, third metal upper end edge, and edge, floating potential pipe lower end is lower than first, second, third edge, metal lower end.In the 3rd metal level, wear ground connection and walk spool 2, ground connection is walked between spool and floating potential pipe 6 and is supported and fix with high strength high insulation engineering plastics, forms strong and weak electricity field shield.Between the first metal layer, the second metal level, the 3rd metal level, fill high tenacity high insulating property engineering insulating material.Overall structure is that ground connection is walked spool 2 and composite insulator sleeve pipe is fixed on base, high pressure cylindrical shell 3 is fixed on composite insulator sleeve pipe, all press shielding cylinder 1 fixing with high pressure cylindrical shell 3, first, second, third metal level is installed on floating potential pipe 6 and ground connection is walked between spool 2.The first metal layer 7 is close to floating potential pipe 6.Between each split block of the second metal level 9 and the 3rd metal level 11, be voltage sensor head interface, by holding wire, connect collecting unit, realize the many protections of many outputs voltage sensor.The first metal layer and the 3rd metal interlevel access build-out resistor, the 3rd metal level is ground plane.Signal lead-out wire adopts the high shielding properties cable of high weather resisteant that secondary voltage signal is conducted to collector.Collector is placed in totally-enclosed metal case body, is installed in base portion 12.Build-out resistor and secondary output capacitance form high voltage and suppress circuit, at voltage collector input the United Nations General Assembly's resistance, guarantee voltage signal progress of disease precision.
In order to realize many outputs of current transformer, can configure the Luo-coil of respective numbers, each Luo-coil forms respectively current sensor interface.Luo-coil is installed in aluminum or other metal housings, and housing is located in Primary Conductor, as shown in Figure 1.
Be below capacitance-resistance voltage division principle, as shown in Figure 4:
High-voltage capacitance and low-voltage capacitance are coaxial configuration and distribute, coaxial capacitance computing formula:
In formula: ε
0the dielectric constant of relative vacuum; ε
rdielectric constant; L capacitance plate length; A relatively low pressure electric capacity metal level radius; B relatively high pressure side metal level radius.Radially fan-shaped decile the second metal level, or axial decile the second metal level, every split block and the 3rd metal level form electric capacity equivalence and are defined as C
2, the first metal layer and the every split interblock of the second metal level capacitance parameter are defined as C
a, between high-pressure metal layer and floating potential pipe, capacitance parameter is defined as C
1.Take radially fan-shaped bisection the second metal level as example according to electrical principle as shown in Figure 4, no-load voltage ratio is:
In formula
N is the second metal level split block number, C
afor capacitance parameter between the first metal layer and the every split block of the second metal level, C
2be the every piecemeal of the second metal level and the 3rd metal level electric capacity, C
a, C
1, C
2all can obtain according to physical dimension, output valve is
build-out resistor R=R ' can ask.
During above execution mode and principle are introduced, the metal level of coaxial capacitive voltage divider is three layers, as other execution modes, also can be set to more than four layers or four layers, and those skilled in the art can select to arrange instrument transformer lead-out terminal as required.
Thus, only provided several concrete execution modes above, but the present invention is not limited to described execution mode.Basic ideas of the present invention are such scheme, and for those of ordinary skills, according to instruction of the present invention, structure, the parameter of designing various distortion do not need to spend creative work.The variation of without departing from the principles and spirit of the present invention execution mode being carried out, modification, replacement and modification still fall within the scope of protection of the present invention.
Claims (9)
1. gas-insulated is exported an electronic type pillar current/voltage combination transformer more, comprises the high pressure cylindrical shell of upper end and the composite insulator sleeve pipe of lower end; The voltage transformer of the coaxial capacitance formula of described combination transformer comprises: be located at the low-voltage capacitance structure that all pressures shielding cylinder (1), floating potential pipe (6) and floating potential pipe (6) inner side in composite insulator sleeve pipe arrange, it is characterized in that, described low-voltage capacitance structure at least ecto-entad is provided with the first metal layer (7), the second metal level (9) and the 3rd metal level (11) successively, between each metal level, is provided with dielectric; Described the first metal layer (7) connects floating potential pipe (6) inwall, and the second metal level (9) is split-type structural.
2. a kind of gas-insulated according to claim 1 is exported electronic type pillar current/voltage combination transformer more, it is characterized in that, described the second metal level (9) radial segments, is comprised of at least two watts of shape structures.
3. a kind of gas-insulated according to claim 1 is exported electronic type pillar current/voltage combination transformer more, it is characterized in that described the second metal level (9) axial segmentation setting.
4. a kind of gas-insulated according to claim 2 is exported electronic type pillar current/voltage combination transformer more, it is characterized in that described the second metal level (9) axial segmentation setting.
5. according to a kind of gas-insulated described in claim 1 or 2 or 3 or 4, export electronic type pillar current/voltage combination transformer more, it is characterized in that, described the 3rd metal level (11) ground connection, each split block of the second metal level connects respectively the corresponding output of described voltage transformer.
6. according to a kind of gas-insulated described in claim 1 or 2 or 3 or 4, export electronic type pillar current/voltage combination transformer more, it is characterized in that, each split block size of described the second metal level (9), shape are identical.
7. according to a kind of gas-insulated described in claim 1 or 2 or 3 or 4, export electronic type pillar current/voltage combination transformer more, it is characterized in that, described electronic current mutual inductor is located in described high pressure cylindrical shell, comprise that at least two for being located in the Luo-coil (4) in Primary Conductor, Luo-coil is arranged in metal shell (5).
8. according to a kind of gas-insulated described in claim 1 or 2 or 3 or 4, export electronic type pillar current/voltage combination transformer more, it is characterized in that, between described the first metal layer and the 3rd metal level, be parallel with build-out resistor.
9. according to a kind of gas-insulated described in claim 1 or 2 or 3 or 4, export electronic type pillar current/voltage combination transformer more, it is characterized in that, the described edge, shielding cylinder lower end of all pressing is lower than edge, floating potential pipe lower end; Edge, floating potential pipe upper end is higher than the edge, upper end of first, second, third metal level, and edge, floating potential pipe lower end is lower than the edge, lower end of first, second, third metal.
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| CN201410001588.2A CN103762067A (en) | 2014-01-02 | 2014-01-02 | Gas-insulated multiple-output electronic post-type current-voltage combined transformer |
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| CN201410001588.2A CN103762067A (en) | 2014-01-02 | 2014-01-02 | Gas-insulated multiple-output electronic post-type current-voltage combined transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360124A (en) * | 2014-11-14 | 2015-02-18 | 国电南京自动化股份有限公司 | Passive electronic current transformer used for integrated intelligent isolation circuit breaker |
| CN105588966A (en) * | 2015-12-04 | 2016-05-18 | 国家电网公司 | Gas insulated classification type voltage transformer |
| CN105632744A (en) * | 2015-12-04 | 2016-06-01 | 国家电网公司 | Gas-insulated stagewise combined current and voltage transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2345432C1 (en) * | 2007-10-01 | 2009-01-27 | Открытое акционерное общество "Энергомашкорпорация" | Outdoor high-voltage current transformer |
| CN202307503U (en) * | 2011-10-31 | 2012-07-04 | 许继集团有限公司 | Electronic current and voltage combined transformer with high-voltage support pillar type suspension structure |
| CN203218099U (en) * | 2013-03-21 | 2013-09-25 | 许继集团有限公司 | Strut type gas-insulating electronic current-voltage combined transformer |
| CN203774079U (en) * | 2014-01-02 | 2014-08-13 | 国家电网公司 | Gas-insulated multi-output electronic type pillar current and voltage combined mutual inductor |
-
2014
- 2014-01-02 CN CN201410001588.2A patent/CN103762067A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2345432C1 (en) * | 2007-10-01 | 2009-01-27 | Открытое акционерное общество "Энергомашкорпорация" | Outdoor high-voltage current transformer |
| CN202307503U (en) * | 2011-10-31 | 2012-07-04 | 许继集团有限公司 | Electronic current and voltage combined transformer with high-voltage support pillar type suspension structure |
| CN203218099U (en) * | 2013-03-21 | 2013-09-25 | 许继集团有限公司 | Strut type gas-insulating electronic current-voltage combined transformer |
| CN203774079U (en) * | 2014-01-02 | 2014-08-13 | 国家电网公司 | Gas-insulated multi-output electronic type pillar current and voltage combined mutual inductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360124A (en) * | 2014-11-14 | 2015-02-18 | 国电南京自动化股份有限公司 | Passive electronic current transformer used for integrated intelligent isolation circuit breaker |
| CN105588966A (en) * | 2015-12-04 | 2016-05-18 | 国家电网公司 | Gas insulated classification type voltage transformer |
| CN105632744A (en) * | 2015-12-04 | 2016-06-01 | 国家电网公司 | Gas-insulated stagewise combined current and voltage transformer |
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Application publication date: 20140430 |