CN104064333A - Outdoor anti-thunder transformer - Google Patents
Outdoor anti-thunder transformer Download PDFInfo
- Publication number
- CN104064333A CN104064333A CN201410247567.9A CN201410247567A CN104064333A CN 104064333 A CN104064333 A CN 104064333A CN 201410247567 A CN201410247567 A CN 201410247567A CN 104064333 A CN104064333 A CN 104064333A
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- transformer
- earth
- transmission line
- pressure side
- horizontal wire
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- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000007935 neutral effect Effects 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 15
- 239000004020 conductor Substances 0.000 abstract description 3
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 108010063955 thrombin receptor peptide (42-47) Proteins 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an outdoor anti-thunder transformer which comprises high-voltage side electric transmission lines 1, low-voltage side electric transmission lines 2 and a transformer metal case 3. The outdoor anti-thunder transformer is characterized in that the high-voltage side electric transmission lines 1 are in earth connection with a first earth connection point 12 through first lightning arresters 11; the low -voltage side electric transmission lines 2 are in earth connection with a second earth connection point 22 through second lightning arresters 21; the first earth connection point 12 and the second earth connection point 22 are communicated though a horizontal wire 4; the transformer metal case 3 is connected with the horizontal wire 4 through a first earth wire 32; neutral points of the low-voltage side electric transmission lines 2 are connected with the horizontal wire 4 through a second earth wire. According to the invention, low-voltage side earth mats and high-voltage side earth mats in different positions are communicated through the horizontal wire, and the transformer metal case is connected to the horizontal wire, so that the condition that the high-voltage side and the transformer metal case bear voltage drop caused by inductors and resistors of an earthed down conductor can be avoided.
Description
Technical field
The present invention relates to a kind of outdoor lightning protection transformer, belong to transformer shocking preventing technology field.
Background technology
As everyone knows, the main cause of thunderbolt infringement distribution transformer is caused by forward and inverse conversion overvoltage: when thunder and lightning is when low-pressure side circuit is invaded, thunder-strike current is invaded low pressure winding and is entered ground through neutral earthing devices, and low-pressure side neutral point current potential is sharply raise, not only can make low pressure winding occur overvoltage, jeopardize low pressure winding, and low pressure winding occurs that overvoltage can be superimposed to high-pressure side by electromagnetic induction, cause high pressure winding to occur dangerous overvoltage; And thunder and lightning is when high-pressure side circuit is invaded, lightning current enters ground by high-pressure side lightning arrester discharge, due to after lightning arrestor movement, enter ground thunder-strike current very large, make earth resistance produce pressure drop and by low-pressure side grounded neutral, low-pressure side formed and impacts current potential, making low pressure survey voltage suddenly raises, and be again superimposed to high-pressure side by electromagnetic induction, in high-pressure side, formed and endangered serious coupling overvoltage.
In order to overcome the reason of above-mentioned damage to crops caused by thunder, prior art proposes to survey and set up ground connection lightning arrester in low pressure, and low pressure is surveyed to earth point and access respectively different ground network from high-pressure side earth point, but such scheme is Shortcomings still: high-pressure side and transformer metal shell not only need to bear residual voltage of arrester, and the pressure drop that the inductance of down conductor, resistance produce also can act on high-pressure side and transformer case, above-mentioned pressure drop is also very important under the impact of thunder-strike current.
Summary of the invention
The deficiency that the present invention exists for prior art just, provides a kind of outdoor lightning protection transformer, can effectively improve the lightning protection properties of outdoor distribution transformer.
For addressing the above problem, the technical solution used in the present invention is as follows:
A kind of outdoor lightning protection transformer, comprise: high-pressure side transmission line, low pressure are surveyed transmission line and transformer metal shell, described high-pressure side transmission line passes through the first lightning arrester the first earth point ground connection, described low-pressure side transmission line passes through the second lightning arrester the second earth point ground connection, and described the first earth point and described the second earth point are connected by horizontal wire, described transformer metal shell connects described horizontal wire by the first earth connection, and the neutral point that described low pressure is surveyed transmission line connects described horizontal wire by the second earth connection.
As the improvement of technique scheme, described high-pressure side transmission line and described low pressure are surveyed between transmission line and are provided with screen.
As the improvement of technique scheme, on the transmission line of described high-pressure side, be provided with pressure limiting trap.
Improvement as technique scheme, described a kind of outdoor lightning protection transformer also comprises transformer core, on described transformer core, be provided with chokes filter circuit, affiliated chokes filter circuit comprises choking-winding, resonant circuit and the 3rd earth connection, and described resonant circuit is connected on described choking-winding and arbitrary electrode tip of described resonant circuit passes through described the 3rd ground connection.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
A kind of outdoor lightning protection transformer of the present invention, first by low pressure survey ground network and the high-pressure side ground network of different location are connected by horizontal wire, and the metal shell of transformer is connected on horizontal wire, thereby avoid making high-pressure side and transformer metal shell to bear the inductance of down conductor, the pressure drop that resistance produces; Secondly by screen being set between primary and secondary winding, improved the electric screen performance of Transformer Winding, elementary and secondary while reducing thunderbolt infringement by forming electric capacity between the mutual transfer strength of interference signal; Again, by chokes filter circuit is set on transformer core, when thunderbolt occurs, offset the changing value of part magnetic flux, thereby reduce the impact damage of thunder-strike current magnetic effect to Transformer Winding; Finally by pressure limiting trap is set in high-pressure side, within further the suffered Lightning Over-voltage of high voltage side of transformer being limited in to certain scope.
Accompanying drawing explanation
Fig. 1 is a kind of outdoor lightning protection transformer circuit structural representation of the present invention (not showing chokes filter circuit part);
Fig. 2 is the structural representation of transformer core of the present invention and chokes filter circuit.
Embodiment
Content of the present invention is described below in conjunction with specific embodiments.
As depicted in figs. 1 and 2, be a kind of outdoor lightning protection transformer device structure schematic diagram of the present invention.A kind of outdoor lightning protection transformer of the present invention, comprise: high-pressure side transmission line 1, low-pressure side transmission line 2 and transformer metal shell 3, it is characterized in that, described high-pressure side transmission line 1 passes through the first lightning arrester 11 the first earth point 12 ground connection, described low-pressure side transmission line 2 passes through the second lightning arrester 21 the second earth point 22 ground connection, and described the first earth point 12 and described the second earth point 22 are connected by horizontal wire 4, described transformer metal shell 3 connects described horizontal wire 4 by the first earth connection 32, the neutral point that described low pressure is surveyed transmission line 2 connects described horizontal wire 4 by the second earth connection 23.
Further with improvement, described high-pressure side transmission line 1 and described low pressure are surveyed between transmission line 2 and are provided with screen 31; Particularly, described screen 31 and transformer winding structure can be as shown in Figure 2, and apparently, the cross sectional shape of screen 31 should be the ring of non-closure, in case transformer short-circuit.And be provided with pressure limiting trap 6 on described high-pressure side transmission line 1; Trap is ripe electric power electric accessory, and the realization of its pressure-limiting function is also known to those skilled in the art, thereby does not repeat them here.
Again further, transformer core 33, on described transformer core 33, be provided with chokes filter circuit, affiliated chokes filter circuit comprises choking-winding 5, resonant circuit 51 and the 3rd earth connection 52, and described resonant circuit 51 is connected on described choking-winding 5 and arbitrary electrode tip of described resonant circuit 51 passes through described the 3rd earth connection 52 ground connection.It will be understood by those skilled in the art that the effect of offsetting thunderbolt magnetic flux change while occurring in order to realize chokes filter circuit, resonant circuit 51 can be that electric capacity and the inductance of one or more groups series connection forms.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the concrete enforcement of the present invention only limits to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the scope of protection of the invention.
Claims (4)
1. an outdoor lightning protection transformer, comprise: high-pressure side transmission line (1), low-pressure side transmission line (2) and transformer metal shell (3), it is characterized in that, described high-pressure side transmission line (1) passes through the first lightning arrester (11) the first earth point (12) ground connection, described low-pressure side transmission line (2) passes through the second lightning arrester (21) the second earth point (22) ground connection, and described the first earth point (12) and described the second earth point (22) are connected by horizontal wire (4), described transformer metal shell (3) connects described horizontal wire (4) by the first earth connection (32), the neutral point that described low pressure is surveyed transmission line (2) connects described horizontal wire (4) by the second earth connection (23).
2. a kind of outdoor lightning protection transformer as claimed in claim 1, is characterized in that, described high-pressure side transmission line (1) and described low pressure are surveyed between transmission line (2) and is provided with screen (31).
3. a kind of outdoor lightning protection transformer as claimed in claim 1, is characterized in that, is provided with pressure limiting trap (6) on described high-pressure side transmission line (1).
4. a kind of outdoor lightning protection transformer as claimed in claim 1, it is characterized in that, also comprise transformer core (33), described transformer core is provided with chokes filter circuit on (33), affiliated chokes filter circuit comprises choking-winding (5), resonant circuit (51) and the 3rd earth connection (52), and described resonant circuit (51) is connected on described choking-winding (5) arbitrary electrode tip upper and described resonant circuit (51) and passes through described the 3rd earth connection (52) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247567.9A CN104064333A (en) | 2014-06-06 | 2014-06-06 | Outdoor anti-thunder transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410247567.9A CN104064333A (en) | 2014-06-06 | 2014-06-06 | Outdoor anti-thunder transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104064333A true CN104064333A (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410247567.9A Pending CN104064333A (en) | 2014-06-06 | 2014-06-06 | Outdoor anti-thunder transformer |
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| Country | Link |
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| CN (1) | CN104064333A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129822A (en) * | 2016-06-29 | 2016-11-16 | 大唐丘北风电有限责任公司 | A kind of box type transformer cabinet with lightning protection effect |
| CN108879628A (en) * | 2018-06-25 | 2018-11-23 | 广西电网有限责任公司电力科学研究院 | A kind of distribution transformer lightning protection mode of connection based on inductance filter |
| CN110474313A (en) * | 2019-08-21 | 2019-11-19 | 李宝华 | A kind of lightning protection device that high-tension transformer isolation is combined with filtering |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185918Y (en) * | 1993-12-07 | 1994-12-21 | 吴江市变压器厂 | Power transformer with built-in lightning arrester |
| CN1427428A (en) * | 2001-12-20 | 2003-07-02 | 王巨丰 | High efficiency lightning protection transformer |
| EP1575142A2 (en) * | 2000-07-21 | 2005-09-14 | Koninklijke KPN N.V. | System for overvoltage protection |
| CN2852483Y (en) * | 2005-08-25 | 2006-12-27 | 宋益平 | Distribution transformer and lightning protection apparatus of low-voltage power station |
| CN201181637Y (en) * | 2008-04-18 | 2009-01-14 | 王怀毅 | Lightning protection distribution transformer |
| CN101800119A (en) * | 2010-04-08 | 2010-08-11 | 李景禄 | Lightning resistant distribution transformer |
-
2014
- 2014-06-06 CN CN201410247567.9A patent/CN104064333A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185918Y (en) * | 1993-12-07 | 1994-12-21 | 吴江市变压器厂 | Power transformer with built-in lightning arrester |
| EP1575142A2 (en) * | 2000-07-21 | 2005-09-14 | Koninklijke KPN N.V. | System for overvoltage protection |
| CN1427428A (en) * | 2001-12-20 | 2003-07-02 | 王巨丰 | High efficiency lightning protection transformer |
| CN2852483Y (en) * | 2005-08-25 | 2006-12-27 | 宋益平 | Distribution transformer and lightning protection apparatus of low-voltage power station |
| CN201181637Y (en) * | 2008-04-18 | 2009-01-14 | 王怀毅 | Lightning protection distribution transformer |
| CN101800119A (en) * | 2010-04-08 | 2010-08-11 | 李景禄 | Lightning resistant distribution transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129822A (en) * | 2016-06-29 | 2016-11-16 | 大唐丘北风电有限责任公司 | A kind of box type transformer cabinet with lightning protection effect |
| CN108879628A (en) * | 2018-06-25 | 2018-11-23 | 广西电网有限责任公司电力科学研究院 | A kind of distribution transformer lightning protection mode of connection based on inductance filter |
| CN110474313A (en) * | 2019-08-21 | 2019-11-19 | 李宝华 | A kind of lightning protection device that high-tension transformer isolation is combined with filtering |
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Application publication date: 20140924 |