CN201946975U - Alternating-direct current current-limiting device - Google Patents
Alternating-direct current current-limiting device Download PDFInfo
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- CN201946975U CN201946975U CN201120045386XU CN201120045386U CN201946975U CN 201946975 U CN201946975 U CN 201946975U CN 201120045386X U CN201120045386X U CN 201120045386XU CN 201120045386 U CN201120045386 U CN 201120045386U CN 201946975 U CN201946975 U CN 201946975U
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- direct current
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Abstract
The utility model relates to an alternating-direct current current-limiting device. A reactor is arranged in a resistor. The reactor and the resistor are both fixed by an upper fixing support and a lower fixing support. The reactor is a coil formed by continuously coiling a plurality of wires. The reactor coil is fixed by a fastening device. The resistor is a coil pros and cons in segmental and noninductive winding. A base is arranged under the reactor and the resistor to fix the lower fixing support. The base and the lower fixing support are supported by a post insulator in between. An outlet line terminal is arranged at the upper end of the reactor, and the other end of the reactor is connected with the resistor which is provided with a plurality of outlet line terminals. After the alternating-direct current current-limiting device is connected with a transformer neutral point, overvoltage is effectively inhibited, alternating current and direct current are effectively limited, and damages to the transformer caused by overvoltage and increased vibration, noises, and wastage caused by direct current biasing are avoided. The alternating-direct current current-limiting device is simple, small in size, light and obviously reduced in occupancy and is suitable for installment and use in substation under operation.
Description
Technical field
The utility model relates to the equipment that electric power system suppresses overvoltage and D.C. magnetic biasing, particularly a kind of transformer alternating current-direct current current-limiting apparatus.
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.
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 transformer and become pursuing one's goal of these those skilled in the art with the alternating current-direct current current-limiting apparatus.
Summary of the invention
Task of the present utility model provides a kind of alternating current-direct current current-limiting apparatus, 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.In addition, this device energy limiting transformer overvoltage level suppresses the transformer single-phase short circuit current, prevents that transformer from damaging.
Technical solution of the present utility model is as follows:
A kind of alternating current-direct current current-limiting apparatus comprises reactor, resistor, base, post insulator and shading rain cap;
Described reactor is arranged in the resistor, comprises coil, coil insulation material, cross-over block, lead-out wire terminal, insulation fixed support and fastener, and reactor and resistor are fixed by upper and lower fixed support; Reactor is that coil adopts the continuous coiling of stranded conductor to form, and reactor winding is fixed by fastener; Resistor is that coil adopts the positive and negative noninductive segmentation coiling of lead to form;
Described reactor winding coats with insulating material, and the high-temperature insulation cushion block is set between coil turn;
Described resistor coil coats with insulating material, and the high-temperature insulation cushion block is set between lead;
Described base is arranged on reactor and resistor bottom with fixing fixed support down, supports by post insulator between following fixed support and the base;
Described reactor upper end is provided with a lead-out wire terminal, and the reactor other end is connected with resistor, and resistor is provided with some lead-out wire terminals.
Described reactor winding is copper cash or copper bar or copper bar.
The reactance value of described reactor is at 5～20 Ω.
Described resistor is made up of the coil of some similar resistance, and the resistor coil is an aluminum steel, or is high resistivity lead or copper bar or copper bar.
The resistance value of described resistor is between 1～6 Ω.
Described post insulator amounts to six, and six post insulators are symmetrically distributed according to the center of circle and are arranged on down support bracket fastened bottom.
Described fixed support is high temperature resistant circular support.
Fastener in described reactor and the resistor is the high temperature resistant circular support that has some radial support bars.
Winding wire in described reactor and the resistor is round conductor or rectangular conductor or sheet lead.
Described reactor and resistor are the air-cooled type reactors.
The utility model is owing to adopted above technical scheme, make it compared with prior art, after transformer neutral point inserts alternating current-direct current current-limiting apparatus of the present utility model, can effectively reduce the transformer overvoltage, reduce the transformer single-phase short circuit current, suppress the influence of D.C. magnetic biasing, prevent that vibration strengthens transformer, noise increases, loss increases because of magnetic bias causes.
Adopt alternating current-direct current current-limiting apparatus of the present utility model, can unite two into one little reactance and small resistor, occupation area of equipment is little, quality is lighter relatively, cost of investment is low, and is easy for installation, is a kind of economy, reliable, practical transformer alternating current-direct current current-limiting apparatus, solved the problem of single-phase short circuit current simultaneously, be adapted at moving in the transformer station and install and use.
Description of drawings
Fig. 1 is the structural representation of a kind of alternating current-direct current current-limiting apparatus of the present utility model.
Fig. 2 is the cross sectional representation at Fig. 1 alternating current-direct current current-limiting apparatus middle part.
Reference numeral:
1 is reactor lead-out wire terminal, and 2 is shading rain cap, and 3 is last fixed support, 4 is resistor, and 5 is reactor, and 6 is the resistor tap terminals, 7 is cross-over block, 8 are following fixed support, and 9 is base, and 10 is post insulator, 12 is fastener, 13 is reactor winding, and 15 is resistor lead-out wire terminal, and 16 is the resistor coil.
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 alternating current-direct current current-limiting apparatus, and it mainly is made up of reactor lead-out wire terminal 1, shading rain cap 2, upper and lower fixed support 3,8, resistor 4, reactor 5, resistor tap terminals 6, cross-over block 7, base 9 and post insulator 10.
This alternating current-direct current current-limiting apparatus is made up of resistor 4 and reactor 5, and reactor 5 is arranged in the resistor 1, and reactor 5 and resistor 1 comprise coil, coil insulation material, cross-over block, lead-out wire terminal, insulation fixed support and fastener.Reactor 5 and resistor 4 are fixed by upper and lower fixed support 3,8.
The positive and negative segmentation coiling of resistor 4 usefulness high resistivity leads forms, and an outlet terminal 6 is drawn in each segmentation respectively, isolates with cross-over block 7 between section and the section, and the upper and lower fixed support 3,8 of resistor 4 usefulness is fixed.Resistor 4 is made up of the coil of some similar resistance, and resistor coil 16 is an aluminum steel, or is high resistivity lead or copper bar or copper bar.Resistor coil 16 usefulness insulating material coat, and high-temperature insulation cushion block 7 is set between lead.Resistor 4 adopts coil type, and lead adopts the positive and negative winding technology of no sensing mode.The 16 segmentation coilings of resistor coil form different resistance values.The resistance value of resistor 4 is between 1～6 Ω.
The lead of reactor winding 13 and resistor coil 16 is a stranded conductor, and wire shape is circle or rectangle or sheet.Resistor coil 16 leads adopt high resistivity material, and resistivity is 2.0 * 10
-8～1.3 * 10
-5Ω m.
The upper end of reactor 4 is provided with a lead-out wire terminal 1, and reactor 4 other ends are connected with resistor 5, and lead-out wire terminal 1 adopts copper bar and perforate, is convenient to be connected with bus.Resistor 5 has some lead-out wire terminals, can connect into the resistor of some different resistances.Resistor 5 every section draw a terminal respectively, can connect into different resistances, be convenient to the user and select for use.
Upper and lower fixed support 3,8 is high temperature resistant circular support, is made by exotic material.Fastener 12 is for having the high temperature resistant circular support of some radial support bars.Some post insulators 10 are separately positioned on down fixed support 8 bottoms.
Base 9 is arranged on reactor 5 and resistor 4 bottoms with fixing fixed support 8 down, between following fixed support 8 and the base 9 by post insulator 10 supports.
Alternating current-direct current current-limiting apparatus of the present utility model is equipped with shading rain cap 2, can prevent that rainwater from entering reactor and resistor inside.
In the present embodiment, post insulator 10 amounts to six, and six post insulators 10 are symmetrically distributed according to the center of circle and are arranged on down the bottom of fixed support 8.High-temperature insulation material is the epoxy-mica or the material of thermal endurance class roughly the same.Upper and lower fixed support 3,8 by exotic material or roughly the same the material of thermal endurance class make.Fastener 12 is non-magnet material or insulating material.
The electrical quantity of alternating current-direct current current-limiting apparatus of the present utility model is as follows:
The conductor resistance rate is 2.0 * 10
-8～1.3 * 10
-5The lead of Ω m.
The resistance value of resistor 4 is 1～10 Ω.
The reactance value of reactor 5 is at 5～20 Ω.
In actual the use, resistor adopts resistivity 2.0 * 10 in the alternating current-direct current current-limiting apparatus of the present utility model
-8～1.3 * 10
-5The positive and negative noninductive segmentation coiling of the insulated conductor of Ω m forms, and total resistance value is between 1～10 Ω, and reactance value adopts the continuous coiling of copper conductor to form, and reactance value is between 5～20 Ω.Reactance coil and resistance coil adopt hollow mode, cushion block adopts high-temperature insulation material (as mica etc.) between lead, post insulator adopts magnetic material, and the coil stationary support adopts roughly the same material of high temperature resistant bakelite or other, and the coil type of cooling adopts air cooling.A shading rain cap is installed on device top, prevents that rainwater from entering in reactor and the resistor.One end of reactor is drawn with transformer neutral point and is connected, and the other end is connected with resistor, and some outlet terminals of resistor need by the user, are connected into different resistances and link to each other with earth connection.
Transformer neutral point installs the alternating current-direct current current-limiting apparatus 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.Alternating current-direct current current-limiting apparatus of the present utility model unites two into one reactor and small resistor, has saved occupation area of equipment effectively, and has saved cost, has improved equipment dependability.
Alternating current-direct current current-limiting apparatus of the present utility model unites two into one reactor and resistor, and resistance coil adopts the lead of high resistivity, and coil winding adopts positive and negative noninductive segmentation coiling.Reactance coil adopts the continuous coiling of copper conductor to form, and coil turn determines that according to resistance value and reactance value cross-over block adopts high-temperature insulation material between coil turn, and insulating material also can adopt other roughly the same exotic material except that with the epoxy-mica.
In summary, after transformer neutral point inserts alternating current-direct current current-limiting apparatus 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 (10)
1. an alternating current-direct current current-limiting apparatus comprises reactor, resistor, base, post insulator and shading rain cap, it is characterized in that:
Described reactor is arranged in the resistor, comprises coil, coil insulation material, cross-over block, lead-out wire terminal, insulation fixed support and fastener, and reactor and resistor are fixed by upper and lower fixed support; Reactor is that coil adopts the continuous coiling of stranded conductor to form, and reactor winding is fixed by fastener; Resistor is that coil adopts the positive and negative noninductive segmentation coiling of lead to form;
Described reactor winding coats with insulating material, and the high-temperature insulation cushion block is set between coil turn;
Described resistor coil coats with insulating material, and the high-temperature insulation cushion block is set between lead;
Described base is arranged on reactor and resistor bottom with fixing fixed support down, supports by post insulator between following fixed support and the base;
Described reactor upper end is provided with a lead-out wire terminal, and the reactor other end is connected with resistor, and resistor is provided with some lead-out wire terminals.
2. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: described reactor winding is copper cash or copper bar or copper bar.
3. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: the reactance value of described reactor is at 5～20 Ω.
4. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: described resistor is made up of the coil of some similar resistance, and the resistor coil is an aluminum steel, or is high resistivity lead or copper bar or copper bar.
5. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: the resistance value of described resistor is between 1～6 Ω.
6. alternating current-direct current current-limiting apparatus 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 down support bracket fastened bottom.
7. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: described fixed support is high temperature resistant circular support.
8. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: the fastener in described reactor and the resistor is the high temperature resistant circular support that has some radial support bars.
9. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: the winding wire in described reactor and the resistor is round conductor or rectangular conductor or sheet lead.
10. alternating current-direct current current-limiting apparatus as claimed in claim 1 is characterized in that: described reactor and resistor are the air-cooled type reactors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120045386XU CN201946975U (en) | 2011-02-23 | 2011-02-23 | Alternating-direct current current-limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120045386XU CN201946975U (en) | 2011-02-23 | 2011-02-23 | Alternating-direct current current-limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201946975U true CN201946975U (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120045386XU Expired - Lifetime CN201946975U (en) | 2011-02-23 | 2011-02-23 | Alternating-direct current current-limiting device |
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|---|---|
| CN (1) | CN201946975U (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 |
| CN109461570A (en) * | 2018-11-02 | 2019-03-12 | 珠海蓝瑞盟电气有限公司 | A kind of damping unit |
| CN109755944A (en) * | 2017-11-03 | 2019-05-14 | 国网辽宁省电力有限公司阜新供电公司 | A kind of high-speed switch type series compensation device damping unit component |
-
2011
- 2011-02-23 CN CN201120045386XU patent/CN201946975U/en not_active Expired - Lifetime
Cited By (4)
| 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 |
| CN109755944A (en) * | 2017-11-03 | 2019-05-14 | 国网辽宁省电力有限公司阜新供电公司 | A kind of high-speed switch type series compensation device damping unit component |
| CN109461570A (en) * | 2018-11-02 | 2019-03-12 | 珠海蓝瑞盟电气有限公司 | A kind of damping unit |
| CN109461570B (en) * | 2018-11-02 | 2024-02-09 | 珠海蓝瑞盟电气有限公司 | Damping device |
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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 |
Granted publication date: 20110824 |
|
| CX01 | Expiry of patent term |