CN202424147U - Intelligent short circuit current limiter - Google Patents
Intelligent short circuit current limiter Download PDFInfo
- Publication number
- CN202424147U CN202424147U CN2011205391130U CN201120539113U CN202424147U CN 202424147 U CN202424147 U CN 202424147U CN 2011205391130 U CN2011205391130 U CN 2011205391130U CN 201120539113 U CN201120539113 U CN 201120539113U CN 202424147 U CN202424147 U CN 202424147U
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- phase
- short circuit
- transformer
- circuit current
- current limiter
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Abstract
The utility model relates to an intelligent short circuit current limiter which comprises a three-phase rectifying bridge, a current limiting inductor L and a three-phase transformer T. The current limiting inductor L and a current limiting resistor R are connected in series at the direct current output end of the three-phase rectifying bridge. The primary side of each phase of the three-phase transformer T is connected between each phase and load of a power grid, and 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 rectifying bridge. The three-phase rectifying bridge is composed of thyristors. The intelligent short circuit current limiter saves a branch inductor, greatly reduces turns number of the transformer, iron core section and the like, obviously reduces weight, size and cost and is easy to popularize.
Description
Technical field
The utility model relates to a kind of flow restricter of short trouble, is mainly used in when electronic circuit is short-circuited phenomenon to carry out current limliting, relates 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.
The utility model content
The deficiency that the utility model exists to prior art just provides a kind of intelligent short circuit current limiter.
For achieving the above object; The utility model 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 beneficial effect of the utility model is:
Because the three-phase commutation bridge of the short circuit current limiter of the utility model 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 utility model 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 the described short circuit current limiter of the utility model be easier to promote with universal.
Description of drawings
Fig. 1 is the described intelligent short circuit current limiter circuit theory diagrams of the utility model.
Embodiment
To combine concrete embodiment that the content of the utility model 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 |
|---|---|---|---|
| CN2011205391130U CN202424147U (en) | 2011-12-21 | 2011-12-21 | Intelligent short circuit current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205391130U CN202424147U (en) | 2011-12-21 | 2011-12-21 | Intelligent short circuit current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202424147U true CN202424147U (en) | 2012-09-05 |
Family
ID=46748872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205391130U Expired - Fee Related CN202424147U (en) | 2011-12-21 | 2011-12-21 | Intelligent short circuit current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202424147U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420422A (en) * | 2011-12-21 | 2012-04-18 | 铜陵浩岩节能科技有限公司 | Intelligent short-circuit current limiter |
| CN103414175A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Short-circuit fault current limiter |
-
2011
- 2011-12-21 CN CN2011205391130U patent/CN202424147U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420422A (en) * | 2011-12-21 | 2012-04-18 | 铜陵浩岩节能科技有限公司 | Intelligent short-circuit current limiter |
| CN103414175A (en) * | 2013-07-29 | 2013-11-27 | 西安交通大学 | Short-circuit fault current limiter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20131221 |