CN102420422A - Intelligent short-circuit current limiter - Google Patents
Intelligent short-circuit current limiter Download PDFInfo
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- CN102420422A CN102420422A CN2011104317854A CN201110431785A CN102420422A CN 102420422 A CN102420422 A CN 102420422A CN 2011104317854 A CN2011104317854 A CN 2011104317854A CN 201110431785 A CN201110431785 A CN 201110431785A CN 102420422 A CN102420422 A CN 102420422A
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- transformer
- current
- circuit current
- current limiter
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Abstract
The invention relates to an intelligent short-circuit current limiter, which comprises a three-phase rectifier bridge, a current-limiting reactor L and a three-phase transformer T, wherein the current-limiting reactor L and a current-limiting resistor R are connected in series to the direct-current output end of the three-phase rectifier bridge; the primary side of each phase of the three-phase transformer T is connected in series between each phase and each load of a power grid; the secondary side of each phase of the three-phase transformer T is connected with the alternating-current side of each phase of the three-phase rectifier bridge; and the three-phase rectifier bridge consists of thyristors. In the intelligent short-circuit current limiter, a shunting inductor is omitted, the number of turns of the transformer, the section of an iron core and the like can be reduced greatly, and the weight, the volume and the cost of the transformer are reduced remarkably; and the short-circuit current limiter is easier to popularize.
Description
Technical field
The present invention relates to a kind of flow restricter of short trouble, be mainly used in when electronic circuit is short-circuited phenomenon and carry out current limliting, relate in particular to the short circuit current limitation of field of power electronics.
Background technology
Improving constantly of Along with people's living standard, electronic product have been infiltrated people's life gradually.Along with the expansion day by day of electric power system grid connection capacity, to the capacity of short circuit control requirement raising thereupon of circuit.Because the fast circuit of the not competent high power capacity of mechanical switch, repeatability cuts off or the electric current restriction at present, various short circuit current limiters are proposed by numerous and confused.A large amount of short circuit current limiter circuit still is in experiment and tentative stage, because factors such as performance, cost also do not have a kind of short circuit current limiter to reach the industrial applications stage at present.In numerous short circuit current limiter circuit, adopt the scheme of power electronic device to have the advantage of combination properties such as the reliability taken into account, rapidity, cost are low.
At present; The transformer of existing short-circuit fault current limiter must design according to rated capacity (like rated voltage, rated current etc.); When being short-circuited; Allow electric power system through bigger short circuit current in the control range, make device can adapt to the operation of the existing relaying protection system of electric power system.For guaranteeing that short circuit current limiter does not influence the line flows overcurrent under the nominal situation, must guarantee that the former secondary of transformer fits, so that its leakage inductance is a minimum value.Because transformer only bears extremely low voltage under nominal situation, the resource of transformer often is in the extremely state of waste.Owing to these reasons, can increase the cost of transformer and the volume of device greatly, limited the promotion and application of flow restricter.
Summary of the invention
The deficiency that the present invention exists to prior art just provides a kind of intelligent short circuit current limiter.
For achieving the above object; The present invention adopts following technical scheme: a kind of intelligent short circuit current limiter; Comprise three-phase commutation bridge, current-limiting reactor L and three-phase transformer T; Current-limiting reactor L and current-limiting resistance R are connected in series in the dc output end of three-phase commutation bridge, and the primary side of each phase of three-phase transformer T is serially connected in respectively between each phase and load of electrical network, and each AC side mutually of the secondary side and three-phase commutation bridge of each phase of three-phase transformer T links to each other.
Said three-phase commutation bridge is made up of thyristor.
The invention has the beneficial effects as follows:
Because the three-phase commutation bridge of short circuit current limiter of the present invention is made up of thyristor; Current-limiting reactor is connected in the dc output end of three-phase commutation bridge; The primary side of each phase of three-phase transformer is serially connected in respectively between each phase and load of electrical network; Each AC side mutually of the secondary side of each phase of three-phase transformer and three-phase commutation bridge links to each other, and just makes the present invention save shunt inductance, and the number of turn of transformer, core section etc. all can greatly reduce; Its weight, volume, cost significantly descend, and make short circuit current limiter of the present invention be easier to promote with universal.
Description of drawings
Fig. 1 is intelligent short circuit current limiter circuit theory diagrams of the present invention.
Embodiment
To combine concrete embodiment that content of the present invention is described below.
As shown in Figure 1; A kind of short-circuit fault current limiter; Comprise three-phase commutation bridge, current-limiting reactor L and three-phase transformer T; Three-phase commutation bridge is made up of thyristor D1, D2, D3, D4, D5, D6, and current-limiting reactor L and current-limiting resistance R are connected in series in the dc output end of three-phase commutation bridge, and the three-phase of three-phase transformer T is respectively U, V, W.The primary side of each phase of three-phase transformer T is serially connected in respectively between each phase and load of electrical network, and each AC side mutually of the secondary side and three-phase commutation bridge of each phase of three-phase transformer T links to each other.
Claims (2)
1. intelligent short circuit current limiter; It is characterized in that; Comprise three-phase commutation bridge, current-limiting reactor L and three-phase transformer T; Current-limiting reactor L and current-limiting resistance R are connected in series in the dc output end of three-phase commutation bridge, and the primary side of each phase of three-phase transformer T is serially connected in respectively between each phase and load of electrical network, and each AC side mutually of the secondary side and three-phase commutation bridge of each phase of three-phase transformer T links to each other.
2. a kind of intelligent short circuit current limiter as claimed in claim 1 is characterized in that said three-phase commutation bridge is made up of thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104317854A CN102420422A (en) | 2011-12-21 | 2011-12-21 | Intelligent short-circuit current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104317854A CN102420422A (en) | 2011-12-21 | 2011-12-21 | Intelligent short-circuit current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102420422A true CN102420422A (en) | 2012-04-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104317854A Pending CN102420422A (en) | 2011-12-21 | 2011-12-21 | Intelligent short-circuit current limiter |
Country Status (1)
| Country | Link |
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| CN (1) | CN102420422A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633632A (en) * | 2013-11-16 | 2014-03-12 | 中国科学院电工研究所 | Saturated bridge type short circuit fault current limiter |
| CN109586260A (en) * | 2018-10-30 | 2019-04-05 | 华北电力大学 | A kind of resistance sense type capacitor commutation blended learning and its control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275249A (en) * | 2000-03-28 | 2001-10-05 | Nissin Electric Co Ltd | Three-phase current limiting apparatus |
| CN201142562Y (en) * | 2007-12-14 | 2008-10-29 | 南京师范大学 | Short circuit fault current limiter with adjustable impedance |
| CN101707365A (en) * | 2009-11-25 | 2010-05-12 | 中国科学院电工研究所 | Short-circuit fault current limiter |
| CN101752850A (en) * | 2008-11-27 | 2010-06-23 | 王丹宁 | Short trouble current limiter |
| CN202424147U (en) * | 2011-12-21 | 2012-09-05 | 铜陵浩岩节能科技有限公司 | Intelligent short circuit current limiter |
-
2011
- 2011-12-21 CN CN2011104317854A patent/CN102420422A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001275249A (en) * | 2000-03-28 | 2001-10-05 | Nissin Electric Co Ltd | Three-phase current limiting apparatus |
| CN201142562Y (en) * | 2007-12-14 | 2008-10-29 | 南京师范大学 | Short circuit fault current limiter with adjustable impedance |
| CN101752850A (en) * | 2008-11-27 | 2010-06-23 | 王丹宁 | Short trouble current limiter |
| CN101707365A (en) * | 2009-11-25 | 2010-05-12 | 中国科学院电工研究所 | Short-circuit fault current limiter |
| CN202424147U (en) * | 2011-12-21 | 2012-09-05 | 铜陵浩岩节能科技有限公司 | Intelligent short circuit current limiter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633632A (en) * | 2013-11-16 | 2014-03-12 | 中国科学院电工研究所 | Saturated bridge type short circuit fault current limiter |
| CN103633632B (en) * | 2013-11-16 | 2016-10-19 | 中国科学院电工研究所 | A kind of saturated bridge type short circuit fault current limiter |
| CN109586260A (en) * | 2018-10-30 | 2019-04-05 | 华北电力大学 | A kind of resistance sense type capacitor commutation blended learning and its control method |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120418 |