CN104821562A - High-efficient high-speed current-limiting actuator - Google Patents
High-efficient high-speed current-limiting actuator Download PDFInfo
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- CN104821562A CN104821562A CN201510267538.3A CN201510267538A CN104821562A CN 104821562 A CN104821562 A CN 104821562A CN 201510267538 A CN201510267538 A CN 201510267538A CN 104821562 A CN104821562 A CN 104821562A
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- quick
- measurement
- control unit
- efficient
- isolator
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Abstract
A high-efficient high-speed current-limiting actuator relates to the field of circuit safety control. The high-efficient high-speed current-limiting actuator comprises a quick isolator (A), a special-type high-voltage current limiter (B), an electronic transformer (C), a measurement and control unit (D), a high-capacity overvoltage absorber (E) and an isolation switch (G), wherein the isolation switch (G), the electronic transformer (C) and the quick isolator (A) are connected in series in sequence; the measurement and control unit (D) detects current signals at the two ends of the electronic transformer (C) and is connected with the quick isolator (A); the special-type high-voltage current limiter (B) is connected in parallel with the quick isolator (A); and one end of the high-capacity overvoltage absorber (E) is connected with the special-type high-voltage current limiter (B), and one end is grounded. The high-efficient high-speed current-limiting actuator has the advantages of being capable of analyzing actuation and cutting off fault points quickly and efficiently, and being extremely short in actuation time and the like.
Description
Technical field
The present invention relates to circuit safety control field, be specifically related to a kind of efficient high-speed current limiting action device.
Background technology
In recent years, along with country greatly develops, power industry is also advanced by leaps and bounds, and scale is also increasing, and the grid-connected connection between different electric power system is also frequently corresponding, and the failed shorted of outlet also increases, and short trouble impacts whole electrical network, makes electric power safety there is hidden danger.
Summary of the invention
The object of the invention is to provide a kind of efficient high-speed current limiting action device, the features such as it has rapid efficient analysis action, and excises fault point, and operate time is extremely short.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: it comprises quick-acting isolator A, Special high-voltage flow restricter B, electronic mutual inductor C, measurement and control unit D, Large Copacity surge absorber E, isolating switch G, isolating switch G, electronic mutual inductor C, quick-acting isolator A connect successively, the current signal at measurement and control unit D detected electrons formula instrument transformer C two ends, and be connected with quick-acting isolator A, Special high-voltage flow restricter B is in parallel with quick-acting isolator A, Large Copacity surge absorber E mono-termination Special high-voltage flow restricter B, one end ground connection.
The useful point that the present invention has: the operation-current tolerance value of traditional switch; fail to reach higher connecting-disconnecting function; in electric power system, use the present invention can protect the equipment such as 6-35kv main transformer; outlet short trouble in lower system; the rapid efficient analysis action of this device, and excise fault point, operate time is extremely short; the present invention can solve above Problems existing, has economy, the feature such as stable, effective simultaneously.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
Embodiment
With reference to Fig. 1, the present invention is connected in network system, isolating switch G is closed in a situation of use, measurement and control unit D is by special electronic mutual inductor C, this instrument transformer is the high electronic mutual inductor of a kind of anti-saturation degree, the current signal in circuit can be accurately detected, nearly all by quick-acting isolator A that resistance value is micro-ohm rank when measurement and control unit D detects normal current.Large Copacity short circuit or transformer short-circuit is had in system, the current signal that measurement and control unit D collection electric mutual inductor C detects carries out analysis and judges, when reaching a default initiation value, measurement and control unit D will send actuating signal to quick-acting isolator A, quick-acting isolator A will disconnect within the time of Microsecond grade at a high speed, while disconnection, fault current is transferred in high-tension fuse B and carries out blow-out, within the time of 2-3s, cut-off short circuit current, the overvoltage that blow-out produces absorbs release through surge absorber E.After whole action completes, measurement and control unit D gives a warning model, for outside.
Judge whether to be short-circuited at CT electronic mutual inductor C, utilize the instantaneous value of electric current and current changing rate and logical relation, only have and reach condition simultaneously, measurement and control unit D just sends actuating signal, prevent equipment from producing inrush phenomenon in the moment of closing a floodgate, produce erroneous judgement.
Measurement and control unit of the present invention is close to electric mutual inductor C, the consume of anti-stop signal, and isolating switch G and surge absorber E fills and switch cubicle inlet wire and leading-out terminal, and surge absorber E end ground connection, to discharge residual voltage fast.
Break down in systems in which short circuit, before electric current does not reach peak value, by its high-speed breaking, short circuit current is transferred in high-tension fuse and carries out blow-out, and the overvoltage of generation is absorbed by efficient surge absorber and discharges, can handling failure, and eliminates fault.It is limited that common fuse comes disengagement failure current capability region, can not meet during big current.The connecting-disconnecting function of circuit breaker is limited can not reach high breaking; Cut-off in 60-200ms simultaneously, can not available protecting equipment during special short circuit fault.Current limiting reactor decomposes absorption short circuit current, but too increases the idle consume in electrical network, and power grid quality declines.
Therefore the existence that the present invention can overcome the above problems, simultaneously economical, stable, effective.
Claims (1)
1. an efficient high-speed current limiting action device, it is characterized in that it comprises quick-acting isolator (A), Special high-voltage flow restricter (B), electronic mutual inductor (C), measurement and control unit (D), Large Copacity surge absorber (E), isolating switch (G), isolating switch (G), electronic mutual inductor (C), quick-acting isolator (A) is connected successively, the current signal at measurement and control unit (D) detected electrons formula instrument transformer (C) two ends, and be connected with quick-acting isolator (A), Special high-voltage flow restricter (B) is in parallel with quick-acting isolator (A), Large Copacity surge absorber (E) one termination Special high-voltage flow restricter (B), one end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510267538.3A CN104821562A (en) | 2015-05-25 | 2015-05-25 | High-efficient high-speed current-limiting actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510267538.3A CN104821562A (en) | 2015-05-25 | 2015-05-25 | High-efficient high-speed current-limiting actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104821562A true CN104821562A (en) | 2015-08-05 |
Family
ID=53731774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510267538.3A Withdrawn CN104821562A (en) | 2015-05-25 | 2015-05-25 | High-efficient high-speed current-limiting actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104821562A (en) |
-
2015
- 2015-05-25 CN CN201510267538.3A patent/CN104821562A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150805 |
|
| WW01 | Invention patent application withdrawn after publication |