CN1933060B - Electromagnetic voltage mutual inductor used for super high voltage and extra-high voltage - Google Patents
Electromagnetic voltage mutual inductor used for super high voltage and extra-high voltage Download PDFInfo
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- CN1933060B CN1933060B CN2006101244526A CN200610124452A CN1933060B CN 1933060 B CN1933060 B CN 1933060B CN 2006101244526 A CN2006101244526 A CN 2006101244526A CN 200610124452 A CN200610124452 A CN 200610124452A CN 1933060 B CN1933060 B CN 1933060B
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- 238000004804 winding Methods 0.000 claims abstract description 52
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000002955 isolation Methods 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000005684 electric field Effects 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
An electromagnetic voltage transformer is made up with one single-stage SF6 gas isolation transformer and one or two complex single-stage SF6 gas isolated voltage transformers in series, for super and special high voltage. The most upper transformer has one iron core, and the nether and complex single-stage SF6 gas isolated transformer have two iron cores. One iron core makes into single-stage voltage transformer, the other makes into high voltage isolated transformer and the once time winding of high voltage isolated transformer joins compensate capacitor and the once time inputting end. Andits second time winding joins the second time winding of single-stage voltage transformer and the second time outputting end. It adopts series-wound method to improve the electric field distribution of super and special high voltage electromagnetic voltage transformer, overcomes the shortage of imbalance of each core flux and the influence by ground capacitance, reduce the production difficulty and cost. It uses the technology for producing gas isolated voltage transformers to make up electromagnetic voltage transformer for super and special high voltage.
Description
Technical field
The present invention relates to a kind of electromagnetic potential transformer, especially relate to the electromagnetic potential transformer that is used for superhigh pressure and ultra high voltage.
Background technology
Electric power system need be gathered voltage signal from the primary circuit with voltage transformer, offers electric measurement, electric energy metrical, relaying protection and automatics and uses.Electromagnetic potential transformer is mainly used in 220kV and following electric power system at present, and more high-tension electromagnetic potential transformer can't be extensive use of in superhigh pressure (500kV and 750kV) electric power system owing to cost height, manufacture difficulty are big.Electromagnetic potential transformer has single electrode voltage instrument transformer and two kinds of structures of tandem voltage transformer, 110kV and 220kV tandem voltage transformer use porcelain case insulation system, mechanical strength is low, innage is many and easily cracked in the porcelain case, is safe hidden danger, simultaneously after electric pressure rising, tandem winding number increase, iron core and coil direct-to-ground capacitance have also increased, be subjected to the distributed capacitance influence of leakage current, the error instability of instrument transformer, accuracy descends with the increase of tandem hop count.Near single-stage gas-insulated voltage transformer bushing end and the winding electric field is very concentrated, when being used for superhigh pressure, must use the balanced electric field of multistage capacitance plate, so complex structure, and the diameter of a winding is along with the proportional increase of the raising of primary voltage, make and to bear the casing of gas pressure and the difficulty that manufactures and designs of bushing is multiplied, be difficult to use in superhigh pressure and ultra high voltage (1100kV).
In addition, the Chinese invention patent of the applicant invention: 901003018 " voltage mutual inductor serial addition circuits ", a kind of measurement circuitry is disclosed, two earthed voltage transformers winding and secondary winding are connected respectively in this circuit.This tandem-type connection does not allow to change the earth point of instrument transformer, therefore can not be used to measure voltage relatively after the series connection.Because 110kV and above electric power system all are earth neutral systems, need to use earthed voltage transformer to measure phase-to-ground voltage, therefore the electromagnetic potential transformer made from this serial addition circuit can not satisfy the needs of superhigh pressure and extra-high voltage grid.
Summary of the invention
The objective of the invention is, overcome the deficiencies in the prior art, a kind of simple in structure, cost is low and security reliability is high electromagnetic potential transformer that is used for superhigh pressure and ultra high voltage is provided.
Technical solution of the present invention is: a kind of electromagnetic potential transformer that is used for superhigh pressure and ultra high voltage is characterized in that: by a single-stage SF
6Gas-insulated voltage transformer 12 and one or two combined type single-stage SF
6Gas-insulated voltage transformer 13 placement that is composed in series and superposes, between every by last one secondary output terminals a and n and high-voltage earthing terminal N input terminal aa and nn and the sub-A of high voltage input terminal totally three pairs of corresponding connections of terminal with next; A uppermost single-stage SF
6Gas-insulated voltage transformer 12 has only an iron core; Be placed on following combined type single-stage SF
6Gas-insulated voltage transformer 13 has two iron cores, one of them iron core is a single-stage transformer iron core 3, be used to make the single electrode voltage instrument transformer, the iron core that increases newly is a high pressure isolation transformer iron core 6, be used to make the high pressure isolation transformer, winding 4 of high pressure isolation transformer be connected to input terminal aa and nn after compensation condenser 11 is connected, the secondary winding 5 of high pressure isolation transformer be connected to output secondary terminal a and n after the secondary winding 2 of single electrode voltage instrument transformer is connected.
It is characterized in that: combined type single-stage SF
6Gas-insulated voltage transformer 13 is made up of high pressure bearing 7, bushing 8, high-pressure conduit 9, steel casing 10, once input terminal aa and nn and the sub-A of high voltage input terminal on the high pressure bearing 7, secondary output terminals a and n and high-voltage earthing terminal N are arranged at the bottom of steel casing 10; Square shape single-stage transformer iron core 3 with the manufacturing of cold-rolled orientation silicon steel sheet is installed in steel casing 10 bottoms, on iron core column above the iron core 3, be equipped with single-stage instrument transformer secondary winding 2 and a winding 1, winding 4 of high pressure isolation transformer is installed on winding 1 of single-stage instrument transformer, on a winding 4, high-pressure conduit 9 is installed, the high-voltage terminal of two outlets of a winding 4 of high pressure isolation transformer and a winding 1 of single-stage instrument transformer passes from high-pressure conduit 9, building-out capacitor 11 is installed in the high pressure bearing 7, and high-pressure conduit 9 external mounting have bushing 8; High pressure isolation transformer iron core 6 is high magnetic permeability iron cores, is installed in the side of casing 10, is equipped with secondary winding 5 on the high pressure isolation transformer iron core 6, uses SF between winding 4 of high pressure isolation transformer and the secondary winding 5
6Gas-insulated, casing 10 and bushing 8 have gas-tight design, and the SF with 0.35MPa～0.4MPa pressure is filled in inside
6Gas.
This series system makes every single electrode voltage instrument transformer can both independent reliably working on the one hand, and total on the other hand primary voltage is shared by each voltage transformer of series connection, has reduced the separate unit insulating requirements.The shortcoming that the present invention has overcome each stem stem magnetic flux imbalance of tandem voltage transformer and has been subject to the direct-to-ground capacitance influence of leakage current, improved the Electric Field Distribution of superhigh pressure and ultra high voltage electromagnetic potential transformer with series connection method, alleviated manufacture difficulty and reduced production cost, made and to produce superhigh pressure and ultra high voltage electromagnetic potential transformer with the technology of present manufacturing gas-insulated voltage transformer.
Description of drawings
Fig. 1 is a basic circuit diagram of the present invention.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is combined type single-stage SF
6The profile construction schematic diagram of 13 1 embodiment of gas-insulated voltage transformer.
Among the figure: 1. winding of single-stage instrument transformer, 2. single-stage instrument transformer secondary winding, 3. single-stage transformer iron core, 4. winding of high pressure isolation transformer, 5. high pressure isolation transformer secondary winding, 6. high pressure isolation transformer iron core, 7. high pressure bearing, 8. bushing, 9. high-pressure conduit, 10. casing, 11. compensation condensers, 12. single-stage SF
6The gas-insulated voltage transformer, 13. combined type single-stage SF
6The gas-insulated voltage transformer
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a basic circuit diagram of the present invention, and Fig. 2 is a structural representation of the present invention, when the present invention is used for electric pressure and is the 1100kV ultra high voltage, by a single-stage SF
6Gas-insulated voltage transformer 12 and two combined type single-stage SF
6Gas-insulated voltage transformer 13 placement that is composed in series and superposes, between every by last one secondary output terminals a and n and high-voltage earthing terminal N input terminal aa and nn and the sub-A of high voltage input terminal totally three pairs of corresponding connections of terminal with next; A uppermost single-stage SF
6Gas-insulated voltage transformer 12 has only an iron core; Be placed on following combined type single-stage SF
6Gas-insulated voltage transformer 13 has two iron cores, one of them iron core is a single-stage transformer iron core 3, be used to make the single electrode voltage instrument transformer, the iron core that increases newly is a high pressure isolation transformer iron core 6, be used to make the high pressure isolation transformer, winding 4 of high pressure isolation transformer be connected to input terminal aa and nn after compensation condenser 11 is connected, the secondary winding 5 of high pressure isolation transformer be connected to output secondary terminal a and n after the secondary winding 2 of single electrode voltage instrument transformer is connected.This series system, from the secondary voltage of a bottom output is secondary voltage (by the high pressure isolation transformer) sum of each single electrode voltage instrument transformer, make every single electrode voltage instrument transformer can both independent reliably working so on the one hand, total on the other hand primary voltage is shared by each single electrode voltage instrument transformer of series connection, has reduced the separate unit insulating requirements.When electric pressure was the 750kV ultra high voltage, the present invention then was by a single-stage SF
6Gas-insulated voltage transformer 12 and a combined type single-stage SF
6Gas-insulated voltage transformer 13 placement that is composed in series and superposes.
At combined type single-stage SF shown in Figure 3
6In the profile construction schematic diagram of an embodiment of gas-insulated voltage transformer 13, combined type single-stage SF
6Gas-insulated voltage transformer 13 is made up of high pressure bearing 7, bushing 8, high-pressure conduit 9, steel casing 10, the sub-A of secondary input terminal aa and nn and high voltage input terminal is arranged on the high pressure bearing 7, and secondary output terminals a and n and high-voltage earthing terminal N are arranged at the bottom of steel casing 10; Square shape single-stage transformer iron core 3 with the manufacturing of cold-rolled orientation silicon steel sheet is installed in steel casing 10 bottoms, on iron core column above the iron core 3, be equipped with single-stage instrument transformer secondary winding 2 and a winding 1, winding 4 of high pressure isolation transformer is installed on winding 1 of single-stage instrument transformer, on a winding 4, high-pressure conduit 9 is installed, the high-voltage terminal of two outlets of a winding 4 of high pressure isolation transformer and a winding 1 of single-stage instrument transformer passes from high-pressure conduit 9, building-out capacitor 11 is used to compensate winding leakage reactance of high pressure isolation transformer, be installed in the high pressure bearing 7, high-pressure conduit 9 external mounting have bushing 8, and bushing 8 is high strength china sleeve pipe or compound insulating sleeve; High pressure isolation transformer iron core 6 is high magnetic permeability iron cores, is installed in the side of casing 10, is equipped with secondary winding 5 on the high pressure isolation transformer iron core 6, uses SF between winding 4 of high pressure isolation transformer and the secondary winding 5
6Gas-insulated, casing 10 and bushing 8 have gas-tight design, and the SF with 0.35MPa～0.4MPa pressure is filled in inside
6Gas.
Claims (2)
1. an electromagnetic potential transformer that is used for superhigh pressure and ultra high voltage is characterized in that: by a single-stage SF
6Gas-insulated voltage transformer (12) and one or two combined type single-stage SF
6Gas-insulated voltage transformer (13) placement that is composed in series and superposes, between every by two last one secondary output terminals (a, n) and high-voltage earthing terminal (N) with next two input terminals (aa, nn) and high voltage input terminal (A) the totally three pairs of terminals are corresponding connects; A uppermost single-stage SF
6Gas-insulated voltage transformer (12) has only an iron core; Be placed on following combined type single-stage SF
6Gas-insulated voltage transformer (13) has two iron cores, one of them iron core is single-stage transformer iron core (3), be used to make the single electrode voltage instrument transformer, the iron core that increases newly is a high pressure isolation transformer iron core (6), be used to make the high pressure isolation transformer, a winding (4) of high pressure isolation transformer be connected to two input terminal (aa after compensation condenser (11) is connected, nn), the secondary winding of high pressure isolation transformer (5) be connected to after the secondary winding (2) of single electrode voltage instrument transformer is connected two secondary output terminals (a, n).
2. the electromagnetic potential transformer that is used for superhigh pressure and ultra high voltage according to claim 1 is characterized in that: combined type single-stage SF
6Gas-insulated voltage transformer (13) is made up of high pressure bearing (7), bushing (8), high-pressure conduit (9), steel casing (10), two input terminal (aa are arranged on the high pressure bearing (7), nn) and high voltage input terminal (A), the bottom of steel casing (10) have two secondary output terminals (a, n) and high-voltage earthing terminal (N); The square shape single-stage transformer iron core made from the cold-rolled orientation silicon steel sheet (3) is installed in steel casing (10) bottom, on the top iron core column of single-stage transformer iron core (3), be equipped with a winding of single-stage instrument transformer secondary winding (2) and single-stage instrument transformer (1), go up an installation high pressure winding of isolation transformer (4) at a winding of single-stage instrument transformer (1), go up installation high-pressure conduit (9) at a winding (4) of high pressure isolation transformer, the high-voltage terminal of two outlets of a winding (4) of high pressure isolation transformer and a winding (1) of single-stage instrument transformer passes from high-pressure conduit (9), compensation condenser (11) is installed in the high pressure bearing (7), and high-pressure conduit (9) external mounting has bushing (8); High pressure isolation transformer iron core (6) is the high magnetic permeability iron core, be installed in the side of steel casing (10), be equipped with the secondary winding (5) of high pressure isolation transformer on the high pressure isolation transformer iron core (6), use SF between the secondary winding (5) of a winding of high pressure isolation transformer (4) and high pressure isolation transformer
6Gas-insulated, steel casing (10) and bushing (8) have gas-tight design, inside to fill SF with 0.35MPa～0.4MPa pressure
6Gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101244526A CN1933060B (en) | 2006-09-05 | 2006-09-05 | Electromagnetic voltage mutual inductor used for super high voltage and extra-high voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101244526A CN1933060B (en) | 2006-09-05 | 2006-09-05 | Electromagnetic voltage mutual inductor used for super high voltage and extra-high voltage |
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| Publication Number | Publication Date |
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| CN1933060A CN1933060A (en) | 2007-03-21 |
| CN1933060B true CN1933060B (en) | 2010-07-28 |
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| CN2006101244526A Active CN1933060B (en) | 2006-09-05 | 2006-09-05 | Electromagnetic voltage mutual inductor used for super high voltage and extra-high voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108776270A (en) * | 2018-04-18 | 2018-11-09 | 云南电网有限责任公司怒江供电局 | A kind of series compensation platform fault locator |
| RU189077U1 (en) * | 2018-12-28 | 2019-05-13 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Cascade Power Transformer |
| CN111986899A (en) * | 2020-08-28 | 2020-11-24 | 福州大学 | Multi-stage insulation dry current transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2115113A1 (en) * | 1971-03-25 | 1972-09-28 | Siemens Ag | Inductive transducer |
| CN1173723A (en) * | 1995-01-25 | 1998-02-18 | 山本诚 | High-tension transformation equipment |
| CN200950390Y (en) * | 2006-09-05 | 2007-09-19 | 国网武汉高压研究院 | Electromagnetic voltage potential transformer for superhigh voltage and extra-high voltage |
-
2006
- 2006-09-05 CN CN2006101244526A patent/CN1933060B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2115113A1 (en) * | 1971-03-25 | 1972-09-28 | Siemens Ag | Inductive transducer |
| CN1173723A (en) * | 1995-01-25 | 1998-02-18 | 山本诚 | High-tension transformation equipment |
| CN200950390Y (en) * | 2006-09-05 | 2007-09-19 | 国网武汉高压研究院 | Electromagnetic voltage potential transformer for superhigh voltage and extra-high voltage |
Non-Patent Citations (1)
| Title |
|---|
| JP平11-176678A 1999.07.02 |
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Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE Free format text: FORMER OWNER: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID Effective date: 20091113 |
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Effective date of registration: 20091113 Address after: Nanjing City, Jiangsu Province, South ruilu No. 8 post encoding: 210003 Applicant after: STATE GRID ELECTRIC POWER Research Institute Address before: Hubei province Wuhan city Hongshan District Luoyu Road No. 143 post encoding: 430074 Applicant before: STATE GRID WUHAN HIGH VOLTAGE Research Institute |
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Address after: 211106 No. 19 Chengxin Avenue, Jiangning Economic and Technological Development Zone, Nanjing City, Jiangsu Province Patentee after: STATE GRID ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Address before: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Patentee before: STATE GRID ELECTRIC POWER Research Institute |
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Effective date of registration: 20181218 Address after: 211106 No. 19 Chengxin Avenue, Jiangning Economic and Technological Development Zone, Nanjing City, Jiangsu Province Co-patentee after: STATE GRID SICHUAN ELECTRIC POWER Research Institute Patentee after: STATE GRID ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Co-patentee after: CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Co-patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: 211106 No. 19 Chengxin Avenue, Jiangning Economic and Technological Development Zone, Nanjing City, Jiangsu Province Patentee before: STATE GRID ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. |
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| CB03 | Change of inventor or designer information |
Inventor after: Wang Leren Inventor after: Xiang Qiong Inventor after: Lei Min Inventor after: Chen Ying Inventor after: Zhou Feng Inventor after: Yang Lin Inventor after: Li Yongfei Inventor after: Chen Hui Inventor after: Yin Xiaodong Inventor after: Zhang Shuhan Inventor before: Wang Leren Inventor before: Lei Min Inventor before: Zhang Shuhan |
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