CN106300305A - A kind of zero consume degree of depth current-limiting method - Google Patents
A kind of zero consume degree of depth current-limiting method Download PDFInfo
- Publication number
- CN106300305A CN106300305A CN201610748589.2A CN201610748589A CN106300305A CN 106300305 A CN106300305 A CN 106300305A CN 201610748589 A CN201610748589 A CN 201610748589A CN 106300305 A CN106300305 A CN 106300305A
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- Prior art keywords
- current
- short circuit
- speed
- zero
- sensitive switch
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/021—Current limitation using saturable reactors
Abstract
The invention discloses a kind of zero consume degree of depth current-limiting method.Doped the precise time of three-phase current zero crossing by the high-speed figure potentiometer in Rogowski coil the most accurately, and before every phase current zero passage, send signal respectively, cut-off by speed-sensitive switch accurate separating brake when electric current is close to zero point；In the short circuit current change of current enters deep current-limiting reactor, short circuit current is limited, and amplitude of short circuit is substantially reduced, and is automatically detected busbar voltage by measurement and control unit, and voltage recovery sends signal to speed-sensitive switch immediately, and system recovery is properly functioning.The present invention can solve current limliting depth problem, and electric power reduces substantially, also reduces active reactive loss.
Description
[technical field]
The present invention relates to a kind of high-impedance transformer current limiting technique field put, particularly to a kind of zero consume degree of depth current limliting side
Method.
[background technology]
It is known that power system is short-circuited during fault, short circuit current is generally tens times of rated current, and this gives and becomes
The electrical equipments such as depressor, electromotor, chopper, conveying circuit cause the biggest harm, along with the development of all types of electricity consumption enterprises is strengthened
Greatly, power load is carried out on a large scale soaring, and main transformer capacity increases the most accordingly, each utility power grid systems face short circuit current already close to
With reach load vacuum circuit breaker maximum operating limit, load-side vacuum circuit breaker cut-offs off-capacity, transformator resistance to shorting
The problems such as the design of rush of current ability is not enough, serious threat enterprise security and is run, and in the face of present problem, a lot of enterprises adopt
Limit system short-circuit electric current with high-impedance transformer, but transformator increasing impedance the most finally solves current limliting depth problem, electronic
Power reduces little, also brings active reactive loss, and cost of investment rises, to this end, it is proposed that a kind of zero consume degree of depth current limliting
Method.
[summary of the invention]
Present invention is primarily targeted at a kind of zero consume degree of depth current-limiting method of offer, it is possible to resolve current limliting depth problem, electricity
Power reduces substantially, also reduces active reactive loss.
For achieving the above object, a kind of zero consume degree of depth current-limiting method, its scheme is as follows:
When doping three-phase current zero crossing accurate the most accurately by the high-speed figure potentiometer in Rogowski coil
Between, and before every phase current zero passage, send signal respectively, cut-off by speed-sensitive switch accurate separating brake when electric current is close to zero point；
In the short circuit current change of current enters deep current-limiting reactor, short circuit current is limited, and amplitude of short circuit is substantially reduced,
And busbar voltage is automatically detected by measurement and control unit, voltage recovery sends signal to speed-sensitive switch immediately, and system recovery is properly functioning.
Compared with prior art, there is advantages that and can solve current limliting depth problem, electric power reduces bright
Aobvious, also reduce active reactive loss.
[detailed description of the invention]
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with
Detailed description of the invention, is expanded on further the present invention.
A kind of zero consume degree of depth current-limiting method, by the high-speed figure potentiometer in Rogowski coil, can be the most accurate
Dope the precise time of three-phase current zero crossing, and before every phase current zero passage, send signal respectively, pass through speed-sensitive switch
When electric current is close to zero point, accurate separating brake cut-offs, and the short circuit current change of current enters in deep current-limiting reactor, limiting short-circuit current, short circuit
Current amplitude is substantially reduced, measurement and control unit automatically detect busbar voltage, when voltage recovery sends signal to speed-sensitive switch immediately,
System recovery is properly functioning.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The technology of the industry
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and
Equivalent defines.
Claims (1)
1. a consume degree of depth current-limiting method, it is characterised in that its scheme is as follows:
The precise time of three-phase current zero crossing is doped the most accurately by the high-speed figure potentiometer in Rogowski coil, and
Before every phase current zero passage, send signal respectively, cut-off by speed-sensitive switch accurate separating brake when electric current is close to zero point；
In the short circuit current change of current enters deep current-limiting reactor, short circuit current is limited, and amplitude of short circuit is substantially reduced, and by
Measurement and control unit detects busbar voltage automatically, and voltage recovery sends signal to speed-sensitive switch immediately, and system recovery is properly functioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748589.2A CN106300305A (en) | 2016-08-28 | 2016-08-28 | A kind of zero consume degree of depth current-limiting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748589.2A CN106300305A (en) | 2016-08-28 | 2016-08-28 | A kind of zero consume degree of depth current-limiting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106300305A true CN106300305A (en) | 2017-01-04 |
Family
ID=57677282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610748589.2A Pending CN106300305A (en) | 2016-08-28 | 2016-08-28 | A kind of zero consume degree of depth current-limiting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106300305A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931648A (en) * | 2012-11-20 | 2013-02-13 | 合肥贝阿益电力设备有限公司 | Bus residual voltage holding device |
| CN202872353U (en) * | 2012-10-16 | 2013-04-10 | 安徽中瑞电气技术有限公司 | Zero-loss deep current-limiting device |
| CN104821563A (en) * | 2015-05-25 | 2015-08-05 | 舒尔环保科技（合肥）有限公司 | Zero-loss depth current-limiting protection device |
| CN105098744A (en) * | 2014-11-18 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Bus residual voltage maintenance device |
-
2016
- 2016-08-28 CN CN201610748589.2A patent/CN106300305A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202872353U (en) * | 2012-10-16 | 2013-04-10 | 安徽中瑞电气技术有限公司 | Zero-loss deep current-limiting device |
| CN102931648A (en) * | 2012-11-20 | 2013-02-13 | 合肥贝阿益电力设备有限公司 | Bus residual voltage holding device |
| CN105098744A (en) * | 2014-11-18 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Bus residual voltage maintenance device |
| CN104821563A (en) * | 2015-05-25 | 2015-08-05 | 舒尔环保科技（合肥）有限公司 | Zero-loss depth current-limiting protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
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| WD01 | Invention patent application deemed withdrawn after publication |