CN201936729U - DC (direct current) bias magnetic suppressor - Google Patents
DC (direct current) bias magnetic suppressor Download PDFInfo
- Publication number
- CN201936729U CN201936729U CN2011200430552U CN201120043055U CN201936729U CN 201936729 U CN201936729 U CN 201936729U CN 2011200430552 U CN2011200430552 U CN 2011200430552U CN 201120043055 U CN201120043055 U CN 201120043055U CN 201936729 U CN201936729 U CN 201936729U
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- reactor
- coil
- lead
- inhibitor
- magnetic biasing
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Abstract
The utility model relates to a DC (direct current) bias magnetic suppressor, which comprises a reactor, a box body and a pillar insulator. The reactor is arranged in the box body and comprises a coil, insulating cushion blocks, a fixing bracket and a fastening bracket. The coil is formed by continuously winding a lead wire. The coil is fixed by the fastening bracket and the fixing bracket. The coil of the reactor is formed by the high-resistivity lead wire. Turns of the coil are isolated by the high temperature resistance insulating cushion blocks. The pillar insulator is arranged at the bottom of the fixing bracket of the reactor. Both upper and lower ends of the reactor are provided with an upper outgoing line terminal and a lower outgoing line terminal. The upper part and the lateral surface of the box body are respectively provided with a wall bushing. After a neutral point of a transformer is switched in the DC bias magnetic suppressor, the influence of DC bias magnet can be effectively suppressed and the increased vibration, increased noise and increased loss of the transformer, which are caused by bias magnet, are prevented. Due to the adoption of the technology, the DC bias magnetic suppressor has simple equipment, a small volume, a relatively light weight and an obviously shortened occupied area and an operation substation is easy to install.
Description
Technical field
The utility model relates to the equipment that electric power system suppresses D.C. magnetic biasing, particularly a kind of transformer DC magnetic bias inhibitor.
Background technology
Existing both at home and abroad at present part suppresses the method for direct current, and as employing reverse current penalty method, but control is complicated, poor reliability in service, malfunction easily; Adopt electric capacity every straight method, it is bigger to the primary equipment influence, the overvoltage level height, and short circuit current is big, and device itself and systematic influence are also comparatively complicated, and can not install simultaneously with the little reactance of neutral point of restriction single-phase short circuit current.And adopt the high value reactor, and can little reactance and small resistor being united two into one, occupation area of equipment is little, and cost of investment is low, and is easy for installation, is a kind of economy, reliable, practical transformer DC magnetic bias suppression equipment, solved the problem of single-phase short circuit current simultaneously.At present, this high resistant reactor does not have producer to make as yet, has certain difficulty on technology.
Usually, after transformer was in the D.C. magnetic biasing state, iron core serious magnetic saturation will occur every half period, the exciting current distortion, produce a large amount of harmonic waves, increase core loss, transformer loss increase, temperature rise increase, cause local overheating, noise increases, the vibration aggravation, harmonic wave increases, and reactive loss increases, be in operation under the magnetic bias state for a long time, will produce bigger infringement transformer insulated and Short Circuit withstand impact capacity.
In view of this, seek a kind of D.C. magnetic biasing inhibitor and become pursuing one's goal of these those skilled in the art.
Summary of the invention
Task of the present utility model provides a kind of D.C. magnetic biasing inhibitor, and it has solved above-mentioned existing in prior technology problem, can effectively suppress the influence of D.C. magnetic biasing, prevents that vibration strengthens transformer, noise increases, loss increases because of magnetic bias causes.
Technical solution of the present utility model is as follows:
A kind of D.C. magnetic biasing inhibitor comprises reactor, casing and post insulator;
Described reactor is arranged in the casing, and reactor comprises coil, cross-over block, fixed support and securing bracket, and coil forms with the continuous coiling of lead, and coil is fixed by securing bracket and fixed support;
Described reactor winding is the high resistivity lead, and turn-to-turn is isolated with the high-temperature insulation cushion block;
Described post insulator is arranged in reactor fixed support bottom;
The two ends up and down of described reactor are provided with one and go up lead-out wire terminal and a following lead-out wire terminal;
Described casing top and side are respectively equipped with a wall bushing.
Described post insulator amounts to six, and six post insulators are symmetrically distributed according to the center of circle and are arranged on support bracket fastened bottom.
Described securing bracket is the high temperature resistant circular support that has some radial support bars.
The lead of described coil is round conductor or rectangular conductor or sheet lead, and lead wraps up with high-temperature insulation material, and conductor resistance rate scope is 1.0 * 10
-7～1.3 * 10
-5Between the Ω m.
Described reactor is the air-cooled type reactor.
The resistance value of described reactor is 1～6 Ω.
The reactance value of described reactor is at 5～20 Ω.
The utility model is owing to adopted above technical scheme, make it compared with prior art, after transformer neutral point inserts D.C. magnetic biasing inhibitor of the present utility model, can effectively suppress the transformer overvoltage invades, reduce the transformer single-phase short circuit current, reduce the influence of D.C. magnetic biasing, prevent that vibration strengthens transformer, noise increases, loss increases because of magnetic bias causes.In addition, adopt this technology, equipment is simple, volume is little, and quality is lighter relatively, and floor space is obviously dwindled, and is adapted at moving in the transformer station and installs and uses.
Description of drawings
Fig. 1 is the structural representation of a kind of D.C. magnetic biasing inhibitor of the present utility model.
Fig. 2 is that cross sectional representation is looked on Fig. 1 D.C. magnetic biasing inhibitor left side.
Reference numeral:
1 is following outlet sleeve pipe, and 2 be casing, and 3 be last outlet sleeve pipe, and 4 be last lead-out wire terminal, and 5 is securing bracket, and 6 is coil, and 7 is cross-over block, and 8 is fixed support, and 9 is post insulator, and 12 is that connection is arranged, and 13 is reactor, 14 times lead-out wire terminals.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated.
Referring to Fig. 1 and Fig. 2, the utility model provides a kind of D.C. magnetic biasing inhibitor, and it mainly is made up of reactor 13, time outlet sleeve pipe 1, last outlet sleeve pipe 3, post insulator 9 and casing 2, and whole reactor 13 is fixed in the seal case.
The two ends up and down of reactor 13 are provided with one and go up lead-out wire terminal 4 and a following lead-out wire terminal 14, and upper and lower lead-out wire terminal 4,14 adopts copper bar and perforate, is convenient to be connected with bus.Casing 2 tops and side are provided with a wall bushing that supplies the reactor terminal to draw respectively.
Securing bracket 5 is for having the high temperature resistant circular support of some radial support bars.Some post insulators 9 are separately positioned on fixed support 8 bottoms.
In the present embodiment, post insulator 9 amounts to six, and six post insulators 9 are symmetrically distributed according to the center of circle and are arranged on the bottom of fixed support 8.High-temperature insulation material is the mica or the material of thermal endurance class roughly the same.The insulation securing bracket 5 by high temperature resistant bakelite or roughly the same the material of thermal endurance class make.Securing bracket 5 is non-magnet material or insulating material.
The electrical quantity of D.C. magnetic biasing inhibitor of the present utility model is as follows:
The conductor resistance rate is 1.0 * 10
-7～1.3 * 10
-5The lead of Ω m.
The resistance value of reactor 13 is 1～6 Ω.
The reactance value of reactor 13 is at 5～20 Ω.
In actual the use, reactor winding adopts resistivity 1.0 * 10 in the D.C. magnetic biasing inhibitor of the present utility model
-7～1.3 * 10
-5The wrapped in wire insulating material coiling of Ω m, the reactor resistance value is between 1～6 Ω, and reactance value is between 5～20 Ω.Coil adopts hollow mode, and cross-over block adopts high-temperature insulation material (as mica etc.) between lead, and post insulator adopts magnetic material, and the coil stationary support adopts roughly the same material of high temperature resistant bakelite or other, and the type of cooling adopts air cooling.Reactor is fixed in the casing, and casing is airtight, prevents into water, but well-ventilated all around.Establish two outlet sleeve pipes on the casing, one-in-and-one-out.Lead collar bobbin carriage body inner terminal connects with two outlet terminals of reactor respectively.
The existing both at home and abroad method that suppresses direct current, as employing reverse current penalty method, but control is complicated, poor reliability in service, malfunction easily; Adopt electric capacity every straight method, it is bigger to the primary equipment influence, the overvoltage level height, and short circuit current is big, and device itself and systematic influence are also comparatively complicated, and can not install simultaneously with the little reactance of neutral point of restriction single-phase short circuit current.Transformer neutral point installs the high resistant reactor additional can effectively limit the direct current that flows through the main transformer neutral point; and it is little to transformer body and systematic influence; can effectively suppress transformer single-phase fault electric current, and can be suppressed at reduced levels to overvoltage, play the effect of protection transformer.The high resistant reactor unites two into one reactor and small resistor, has saved occupation area of equipment effectively, and has saved cost, has improved equipment dependability.
The coil of D.C. magnetic biasing inhibitor of the present utility model adopts the lead of high resistivity, lead adopts the high-temperature insulation material parcel, coil winding can adopt coiling from inside to outside, also can adopt from top to bottom or mode coiling from bottom to top, coil turn determines that according to the reactor reactance value conductor resistance rate determines that according to the reactor resistance value cross-over block adopts high-temperature insulation material between coil turn, insulating material also can adopt other roughly the same exotic material except that with the mica.
In summary, after transformer neutral point inserts D.C. magnetic biasing inhibitor of the present utility model, can effectively suppress the influence of D.C. magnetic biasing, prevent that vibration strengthens transformer, noise increases, loss increases because of magnetic bias causes.In addition, this occupation area of equipment is little, and quality is lighter relatively, and operation transformer station easily installs.
Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the utility model, and be not with opposing qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claim the variation of the foregoing description, modification etc.
Claims (7)
1. a D.C. magnetic biasing inhibitor is characterized in that: comprise reactor, casing and post insulator;
Described reactor is arranged in the casing, and reactor comprises coil, cross-over block, fixed support and securing bracket, and coil forms with the continuous coiling of lead, and coil is fixed by securing bracket and fixed support;
Described reactor winding is the high resistivity lead, and turn-to-turn is isolated with the high-temperature insulation cushion block;
Described post insulator is arranged in reactor fixed support bottom;
The two ends up and down of described reactor are provided with one and go up lead-out wire terminal and a following lead-out wire terminal;
Described casing top and side are respectively equipped with a wall bushing.
2. D.C. magnetic biasing inhibitor as claimed in claim 1 is characterized in that: described post insulator amounts to six, and six post insulators are symmetrically distributed according to the center of circle and are arranged on support bracket fastened bottom.
3. D.C. magnetic biasing inhibitor as claimed in claim 1 is characterized in that: described securing bracket is the high temperature resistant circular support that has some radial support bars.
4. D.C. magnetic biasing inhibitor as claimed in claim 1 is characterized in that: the lead of described coil is round conductor or rectangular conductor or sheet lead, and lead wraps up with high-temperature insulation material, and conductor resistance rate scope is 1.0 * 10
-7～1.3 * 10
-5Between the Ω m.
5. D.C. magnetic biasing inhibitor as claimed in claim 1 is characterized in that: described reactor is the air-cooled type reactor.
6. D.C. magnetic biasing inhibitor as claimed in claim 1 is characterized in that: the resistance value of described reactor is 1～6 Ω.
7. D.C. magnetic biasing inhibitor as claimed in claim 1 is characterized in that: the reactance value of described reactor is at 5～20 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200430552U CN201936729U (en) | 2011-02-21 | 2011-02-21 | DC (direct current) bias magnetic suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200430552U CN201936729U (en) | 2011-02-21 | 2011-02-21 | DC (direct current) bias magnetic suppressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201936729U true CN201936729U (en) | 2011-08-17 |
Family
ID=44448245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200430552U Expired - Lifetime CN201936729U (en) | 2011-02-21 | 2011-02-21 | DC (direct current) bias magnetic suppressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201936729U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916414A (en) * | 2012-11-06 | 2013-02-06 | 上海市电力公司 | Direct current and alternating current limiting device |
| CN106449067A (en) * | 2016-10-28 | 2017-02-22 | 许继集团有限公司 | Oil-immersed type split reactor |
| CN109100593A (en) * | 2018-08-16 | 2018-12-28 | 伊犁师范学院 | The D.C. magnetic biasing detection device that alternating current magnetic field can be overcome to interfere |
-
2011
- 2011-02-21 CN CN2011200430552U patent/CN201936729U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916414A (en) * | 2012-11-06 | 2013-02-06 | 上海市电力公司 | Direct current and alternating current limiting device |
| CN106449067A (en) * | 2016-10-28 | 2017-02-22 | 许继集团有限公司 | Oil-immersed type split reactor |
| CN109100593A (en) * | 2018-08-16 | 2018-12-28 | 伊犁师范学院 | The D.C. magnetic biasing detection device that alternating current magnetic field can be overcome to interfere |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |