CN102568791A - Single-phase high-voltage testing transformer - Google Patents
Single-phase high-voltage testing transformer Download PDFInfo
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- CN102568791A CN102568791A CN2010105876470A CN201010587647A CN102568791A CN 102568791 A CN102568791 A CN 102568791A CN 2010105876470 A CN2010105876470 A CN 2010105876470A CN 201010587647 A CN201010587647 A CN 201010587647A CN 102568791 A CN102568791 A CN 102568791A
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- testing transformer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention relates to a single-phase high-voltage testing transformer, which has a double-cylinder structure. Low-voltage coils and high-voltage coils are sleeved on iron cores of two cylinders inside out, the high-voltage coils of the two cylinders are connected with connecting wires in series, the head end and the tail end of each high-voltage winding are led out from an oil tank, low-voltage windings of the two cylinders are led out from the oil tank respectively, and two low-voltage outlet taps are connected outside the oil tank in series or parallel. In the design scheme of the high-voltage testing transformer, the diameter of the iron cores and the structure of serial connection of the high-voltage coils of the two cylinders are selected reasonably, the technical problems of high voltage and low impedance are solved, and the single-phase high-voltage testing transformer can be widely applied to the ultrahigh-voltage testing circuits and has the advantages of low impedance and pressure drop.
Description
Technical field
The present invention relates to the transformer technology field, a kind of specifically single-phase high voltage testing transformer.
Background technology
Testing transformer is the important component part of transformer test equipment, when electric pressure is had relatively high expectations, usually several bench teats is tested transformer and connects use with the tandem bind mode.So just formed cascaded transformer.But the resistance value of tandem formula testing transformer is bigger, usually about 16%, satisfies high voltage at present and low-impedance tandem formula testing transformer does not appear in the newspapers as yet.
Summary of the invention
To weak point such as the resistance value of the tandem formula testing transformer that exists in the prior art is bigger, the technical problem that the present invention will solve provides a kind of single-phase high voltage testing transformer of impedance.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of single-phase high voltage testing transformer of the present invention adopts two rod structures, the sheathed from inside to outside low-voltage coil of difference, high-tension coil on the iron core of two posts, and two post high-tension coil series wirings, the first end of high pressure winding is drawn from fuel tank respectively; Two post low pressure windings are drawn from fuel tank respectively, and two groups of low pressure are lifted one's head and are connected in series or are connected in parallel in the fuel tank outside.
Said high-tension coil adopts is entangled with the continous way structure, and low-voltage coil adopts sped structure; High-tension coil and low-voltage coil all form with the coiling of single paper bag flat type copper wire; Static board is equipped with in said high-tension coil end; Every post coil height is identical in said two rod structures; Ground connection ground screen is equipped with in said stem unshakable in one's determination outside; Ground screen between coil is housed between said high-tension coil and low-voltage coil; The high-tension coil head end is lifted one's head in the bending of fuel tank long axis direction, and the place of lifting one's head is provided with insulation protection; The fuel tank inboard is provided with fuel tank protection cardboard; The low-voltage coil input is provided with voltage transformer.
The present invention has following beneficial effect and advantage:
1. the present invention is the design of high-tension testing transformer; Through rationally choosing core-diameter, the structure of high-tension coil two posts series connection mainly solves the high and little technical problem of impedance of voltage; Can be widely used in the ultra high voltage test circuit, have the little advantage of transformer impedance pressure drop.
Description of drawings
Fig. 1 is a single-phase high voltage testing transformer structural representation of the present invention;
Fig. 2 is a single-phase high voltage testing transformer structure vertical view of the present invention.
Among the figure: 1 is unshakable in one's determination, and 2 is high-tension coil I, and 3 is high-tension coil II, and 4 is line between high-tension coil, and 5 is high pressure head end lead-out wire; 6 is the terminal lead-out wire of high pressure, and 7 is the low pressure lead-out wire, and 8 is voltage transformer, and 9 is fuel tank, and 10 are fuel tank protection cardboard, and 11 is screen I in ground between coil, and 12 is low-voltage coil I, and 13 is iron-cored grounding shield, and 14 is screen II in ground between coil, and 15 is low-voltage coil II, and 16 is static board.
Embodiment
Like Fig. 1, shown in 2, single-phase high voltage testing transformer of the present invention adopts two rod structures, the sheathed from inside to outside low-voltage coil of difference, high-tension coil on the iron core 3 of two posts, and two post high-tension coil series wirings, the first end of high pressure winding is drawn from fuel tank 9 respectively; Two post low pressure windings are drawn from fuel tank respectively, and two groups of low pressure are lifted one's head and are connected in series or are connected in parallel in fuel tank 9 outsides, so that two kinds of different voltages with different of testing transformer high-pressure side output.High-tension coil adopts is entangled with the continous way structure, and the overvoltage that produces when eliminating outside test product generation flashover is to the harm of high pressure winding insulation, and low-voltage coil adopts, thereby has stronger anti-short circuit capability sped structure; High-tension coil and low-voltage coil all form with the coiling of single paper bag flat type copper wire; Every post coil height is identical in two rod structures; Static board 16 is equipped with in the high-tension coil end, with shim coil end electric field; Ground connection ground screen 13 is equipped with in stem unshakable in one's determination outside; Screen II14 in ground between ground screen I 11 and coil is housed between high-tension coil and low-voltage coil between coil; The high-tension coil head end is lifted one's head in fuel tank 9 long axis direction bendings, and the place of lifting one's head is provided with insulation protection; The fuel tank inboard is provided with fuel tank protection cardboard 10; The low-voltage coil input is provided with voltage transformer 8, is used for voltage measurement.
In the present embodiment, single-phase high voltage testing transformer parameter is following:
Capacity 4800kVA; The high pressure winding voltage: during the parallel connection of low pressure winding is 800kV, 400kV during the low pressure windings in series; Low pressure winding voltage: 10kV; The high pressure winding current: during the parallel connection of low pressure winding is 6A, is 12A during the low pressure windings in series; Impedance voltage: during the parallel connection of low pressure winding is 0.5%, is 2% during the low pressure windings in series; Allow running time: allow operation continuously 3 hours; Anti-short-circuit capacity: the continuous flashover that can bear 60A; The ratio of testing transformer resistance and reactance is greater than 0.1;
In the above-mentioned testing transformer parameter, except that operating voltage was higher, the problem that needs emphasis to solve was the too small problem of transformer impedance, and this also is to have negated the main cause that adopts the testing transformer of this parameter request of tandem formula structural design.
Unshakable in one's determination 1 is that hollow is unshakable in one's determination, so that high pressure head end lead-out wire 5 is in fuel tank 9 long axis direction outlets.Choose lower magnetic flux density, adopt arm-tie unshakable in one's determination, core clamping guarantees unshakable in one's determination 1 clamping with the pad pin, and the device body is sling, compress and short-circuit condition under mechanical strength.
High-tension coil is the middle part inlet wire, and high-tension coil I 2 equates highly that with low-voltage coil I 12 high-tension coil II3 highly equates with low-voltage coil II15, and the inner ampere-turn distribution of high-voltage coil and low-voltage coil maintenance balance, to strengthen the anti-short circuit capability of transformer.When choosing the lead wire gauge, guarantee that ratio that the resistance value of transformer satisfies resistance and reactance is greater than 0.1.
High-tension coil I 2 and high-tension coil II3 series wiring, the total number of turns of increase high pressure winding.High-tension coil I 2 is identical with the number of turn of high-tension coil II3.The end of high-tension coil I 2 links to each other with the head end of high-tension coil II3, and the head end of the end of high-tension coil I 2 and high-tension coil I 3 and line operating voltage thereof are 400kV, needs good insulation performance to handle and guarantees its insulation over the ground.The high pressure head end lead-out wire operating voltage of high-tension coil I 2 is 800kV, and insulation level is higher than line between coil.The terminal insulation against ground level of high-tension coil II3 is low, can after simple insulation processing, draw fuel tank 9.
Low-voltage coil I 12 and low-voltage coil II15 draw fuel tank 9 respectively, and the user can carry out the serial or parallel connection wiring in fuel tank 9 outsides as required.When low-voltage coil I 12 and low-voltage coil II15 and tie, pressurization 10kV, magnetic flux density unshakable in one's determination is specified magnetic flux density.The high-pressure side output voltage is 800KV.When low-voltage coil I 12 and low-voltage coil II15 series wiring, pressurization 10kV, magnetic flux density unshakable in one's determination is the half the of specified magnetic flux density.The high-pressure side output voltage is 400kV.
Outside two posts unshakable in one's determination 1 iron-cored grounding shield 13 is housed, screen I 11 in ground between coil is housed between high-tension coil I 2 and the low-voltage coil I 12, screen II14 in ground between coil is housed, between high-tension coil II3 and low-voltage coil II15 in case superpotential transmission between the principal vertical line circle.
The present invention is applied to the open air, and shell is an iron-clad, and two post single-phase oil immersion types satisfy low capacity, Low ESR, high-tension testing transformer requirement.
Claims (9)
1. single-phase high voltage testing transformer is characterized in that: adopt two rod structures, the iron core of two posts (3) is gone up sheathed from inside to outside low-voltage coil, high-tension coil respectively, two post high-tension coil series wirings, and the first end of high pressure winding is drawn from fuel tank respectively; Two post low pressure windings are drawn from fuel tank (9) respectively, and two groups of low pressure are lifted one's head and are connected in series or are connected in parallel in fuel tank (9) outside.
2. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: said high-tension coil adopts is entangled with the continous way structure, and low-voltage coil adopts sped structure; High-tension coil and low-voltage coil all form with the coiling of single paper bag flat type copper wire.
3. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: static board (16) is equipped with in said high-tension coil end.
4. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: every post coil height is identical in said two rod structures.
5. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: ground connection ground screen (13) is equipped with in said stem unshakable in one's determination outside.
6. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: ground screen between coil is housed between said high-tension coil and low-voltage coil.
7. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: the high-tension coil head end is lifted one's head in fuel tank (9) long axis direction bending, and the place of lifting one's head is provided with insulation protection.
8. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: fuel tank (9) inboard is provided with fuel tank protection cardboard (10).
9. by the described single-phase high voltage testing transformer of claim 1, it is characterized in that: the low-voltage coil input is provided with voltage transformer (8).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105876470A CN102568791A (en) | 2010-12-14 | 2010-12-14 | Single-phase high-voltage testing transformer |
| PCT/CN2010/080085 WO2012079261A1 (en) | 2010-12-14 | 2010-12-22 | Single-phase high-voltage testing transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105876470A CN102568791A (en) | 2010-12-14 | 2010-12-14 | Single-phase high-voltage testing transformer |
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| Publication Number | Publication Date |
|---|---|
| CN102568791A true CN102568791A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105876470A Pending CN102568791A (en) | 2010-12-14 | 2010-12-14 | Single-phase high-voltage testing transformer |
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| Country | Link |
|---|---|
| CN (1) | CN102568791A (en) |
| WO (1) | WO2012079261A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485212A (en) * | 2014-11-28 | 2015-04-01 | 辽宁拓新电力电子有限公司 | Low-excitation-impedance single-phase transformer |
| CN105161273A (en) * | 2015-10-22 | 2015-12-16 | 浙江江山变压器股份有限公司 | Single-phase transformer capable of switching multiple series-parallel winding combinations |
| WO2023092628A1 (en) * | 2021-11-25 | 2023-06-01 | 吴江变压器有限公司 | 35 kv dry-type single-phase combined test transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10106858A (en) * | 1996-09-27 | 1998-04-24 | Toshiba Corp | Transformer |
| CN200947381Y (en) * | 2006-08-29 | 2007-09-12 | 山东达驰电气股份有限公司 | Single-phase amorphous iron-core transformer |
| CN201207329Y (en) * | 2008-05-20 | 2009-03-11 | 江苏华鹏变压器有限公司 | Earthing construction for reactor discus |
| CN201425875Y (en) * | 2009-06-05 | 2010-03-17 | 山东达驰电气有限公司 | Electric shock-preventing transformer |
| CN201562575U (en) * | 2009-11-03 | 2010-08-25 | 保定天威集团有限公司 | Single-phase traction transformer for high-speed passenger special line |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201122499Y (en) * | 2007-11-23 | 2008-09-24 | 上海市电力公司 | Capacity-adjustable dry-type transformer |
| CN101236824B (en) * | 2007-12-20 | 2011-05-04 | 卧龙电气集团股份有限公司 | Body structure of single-phase traction transformer |
-
2010
- 2010-12-14 CN CN2010105876470A patent/CN102568791A/en active Pending
- 2010-12-22 WO PCT/CN2010/080085 patent/WO2012079261A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10106858A (en) * | 1996-09-27 | 1998-04-24 | Toshiba Corp | Transformer |
| CN200947381Y (en) * | 2006-08-29 | 2007-09-12 | 山东达驰电气股份有限公司 | Single-phase amorphous iron-core transformer |
| CN201207329Y (en) * | 2008-05-20 | 2009-03-11 | 江苏华鹏变压器有限公司 | Earthing construction for reactor discus |
| CN201425875Y (en) * | 2009-06-05 | 2010-03-17 | 山东达驰电气有限公司 | Electric shock-preventing transformer |
| CN201562575U (en) * | 2009-11-03 | 2010-08-25 | 保定天威集团有限公司 | Single-phase traction transformer for high-speed passenger special line |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485212A (en) * | 2014-11-28 | 2015-04-01 | 辽宁拓新电力电子有限公司 | Low-excitation-impedance single-phase transformer |
| CN105161273A (en) * | 2015-10-22 | 2015-12-16 | 浙江江山变压器股份有限公司 | Single-phase transformer capable of switching multiple series-parallel winding combinations |
| CN105161273B (en) * | 2015-10-22 | 2017-06-27 | 浙江江山变压器股份有限公司 | A kind of single-phase transformer of many combined transformations of connection in series-parallel winding |
| WO2023092628A1 (en) * | 2021-11-25 | 2023-06-01 | 吴江变压器有限公司 | 35 kv dry-type single-phase combined test transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012079261A1 (en) | 2012-06-21 |
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Application publication date: 20120711 |