CN106207951A - The degree of depth current limiting system that a kind of transformator and electromotor share - Google Patents
The degree of depth current limiting system that a kind of transformator and electromotor share Download PDFInfo
- Publication number
- CN106207951A CN106207951A CN201610748641.4A CN201610748641A CN106207951A CN 106207951 A CN106207951 A CN 106207951A CN 201610748641 A CN201610748641 A CN 201610748641A CN 106207951 A CN106207951 A CN 106207951A
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- CN
- China
- Prior art keywords
- speed
- current
- sensitive switch
- degree
- rogowski coil
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/083—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for three-phase systems
Abstract
The invention discloses the degree of depth current limiting system that a kind of transformator and electromotor share, including degree of depth reactor, described degree of depth reactor includes measurement and control unit, Rogowski coil and controller, described Rogowski coil and controller are installed on bus, high-speed figure potentiometer it is provided with in described Rogowski coil, it is provided with speed-sensitive switch in described controller, the signal output part of described high-speed figure potentiometer is connected with the signal input part of described speed-sensitive switch, the voltage output end of described bus is connected with the voltage input end of described measurement and control unit, described bus is near one end sending and receiving motor of Rogowski coil, termination transformator and a load near speed-sensitive switch.The present invention can dope the precise time of three-phase current zero crossing the most accurately, pass through speed-sensitive switch, can cut-off by accurate separating brake when electric current is close to zero point, the short circuit current change of current enters in deep current-limiting reactor, limiting short-circuit current, the present invention strengthens system impedance, makes the drop-out current of load side chopper reduce further, reduces cost.
Description
[technical field]
The present invention relates to a kind of current-limiting apparatus, the degree of depth current limiting system shared particularly to a kind of transformator and electromotor.
[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 transformator and electromotor
The degree of depth current limiting system shared.
[summary of the invention]
Present invention is primarily targeted at the degree of depth current limiting system providing a kind of transformator and electromotor to share, due to Roc
High-speed figure potentiometer in coil, can dope the precise time of three-phase current zero crossing the most accurately, and exist respectively
Send signal before every phase current zero passage, by speed-sensitive switch, can cut-off by accurate separating brake when electric current is close to zero point, short circuit electricity
The stream change of current enters in deep current-limiting reactor, and limiting short-circuit current, amplitude of short circuit is substantially reduced, and can effectively solve background skill
Problem in art.
For achieving the above object, the technical scheme that the present invention takes is:
The degree of depth current limiting system that a kind of transformator and electromotor share, including degree of depth reactor, described degree of depth reactor bag
Including measurement and control unit, Rogowski coil and controller, described Rogowski coil and controller are installed on bus, in described Rogowski coil
Be provided with high-speed figure potentiometer, in described controller, be provided with speed-sensitive switch, the signal output part of described high-speed figure potentiometer with
The signal input part of described speed-sensitive switch connects, and the voltage output end of described bus connects with the voltage input end of described measurement and control unit
Connecing, the signal output part of described measurement and control unit is connected with the signal input part of described speed-sensitive switch and backstage, and described bus is close
One end sending and receiving motor of Rogowski coil, near termination transformator and a load of speed-sensitive switch.
Compared with prior art, there is advantages that due to the high-speed figure potentiometer in Rogowski coil,
The precise time of three-phase current zero crossing can be doped the most accurately, and before every phase current zero passage, send letter respectively
Number, by speed-sensitive switch, can cut-off by accurate separating brake when electric current is close to zero point, the short circuit current change of current enters deep current-limiting reactor
In, limiting short-circuit current, amplitude of short circuit is substantially reduced, and due to measurement and control unit, can automatically detect busbar voltage, work as voltage
Ging up and send signal to speed-sensitive switch immediately, system recovery is properly functioning, the alternative high-impedance transformer of native system, commonly connects
Current-limiting reactor, explosive type high-capacity and high-speed breaking device, when the design of new electricity supplying and using system and business system transformation, available
The present invention strengthens system impedance, makes the drop-out current of load side chopper reduce further, reduces cost.
[accompanying drawing explanation]
Fig. 1 is the structural representation of the present invention.
In figure: 1, degree of depth reactor；2, Rogowski coil；3, speed-sensitive switch；4, bus；5, controller；6, measurement and control unit；7、
Transformator；8, load；9, electromotor.
[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.
As it is shown in figure 1, the degree of depth current limiting system that a kind of transformator and electromotor share, including degree of depth reactor 1, described deeply
Degree reactor 1 includes that measurement and control unit 6, Rogowski coil 2 and controller 5, described Rogowski coil 2 and controller 5 are installed in bus 4
On, it is provided with high-speed figure potentiometer in described Rogowski coil 2, in described controller 5, is provided with speed-sensitive switch 3, described high-speed figure
The signal output part of potentiometer is connected with the signal input part of described speed-sensitive switch 3, and the voltage output end of described bus 4 is with described
The voltage input end of measurement and control unit 6 connects, the signal output part of described measurement and control unit 6 and described speed-sensitive switch 3 and the letter on backstage
Number input connects, and described bus 4 is near one end sending and receiving motor 9 of Rogowski coil 2, near a termination transformation of speed-sensitive switch 3
Device 7 and load 8.
The degree of depth current limiting system that a kind of transformator of the present invention and electromotor share, due to the high-speed figure in Rogowski coil 2
Potentiometer, can dope the precise time of three-phase current zero crossing the most accurately, and respectively before every phase current zero passage
Sending signal, by speed-sensitive switch 3, can cut-off by accurate separating brake when electric current is close to zero point, the short circuit current change of current enters deep limit
In stream reactor, limiting short-circuit current, amplitude of short circuit is substantially reduced, and due to measurement and control unit 6, can automatically detect bus 4
Voltage, when voltage recovery sends signal to immediately speed-sensitive switch 3, and system recovery is properly functioning, the present invention alternative high resistant resistance
Depressor, commonly connect current-limiting reactor, explosive type high-capacity and high-speed breaking device, in the design of new electricity supplying and using system and business system
During transformation, available present aspect strengthens system impedance, makes the drop-out current of load side chopper reduce further, reduces cost.
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. the degree of depth current limiting system that transformator and electromotor share, including degree of depth reactor (1), it is characterised in that: described
Degree of depth reactor (1) includes measurement and control unit (6), Rogowski coil (2) and controller (5), described Rogowski coil (2) and controller
(5) being installed on bus (4), be provided with high-speed figure potentiometer in described Rogowski coil (2), described controller is provided with in (5)
Speed-sensitive switch (3), the signal output part of described high-speed figure potentiometer is connected with the signal input part of described speed-sensitive switch (3),
The voltage output end of described bus (4) is connected with the voltage input end of described measurement and control unit (6), the letter of described measurement and control unit (6)
Number outfan is connected with the signal input part of described speed-sensitive switch (3) and backstage, and described bus (4) is near Rogowski coil (2)
One termination transformator electromotor (9), near termination transformator (7) and the load (8) of speed-sensitive switch (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748641.4A CN106207951A (en) | 2016-08-28 | 2016-08-28 | The degree of depth current limiting system that a kind of transformator and electromotor share |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748641.4A CN106207951A (en) | 2016-08-28 | 2016-08-28 | The degree of depth current limiting system that a kind of transformator and electromotor share |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106207951A true CN106207951A (en) | 2016-12-07 |
Family
ID=57527236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610748641.4A Pending CN106207951A (en) | 2016-08-28 | 2016-08-28 | The degree of depth current limiting system that a kind of transformator and electromotor share |
Country Status (1)
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| CN (1) | CN106207951A (en) |
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 |
| 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 |
| US20150318688A1 (en) * | 2013-01-09 | 2015-11-05 | Shaogui AL | Current limiting device, current limiter and current limiting system for power grid |
| 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 CN201610748641.4A patent/CN106207951A/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 |
| US20150318688A1 (en) * | 2013-01-09 | 2015-11-05 | Shaogui AL | Current limiting device, current limiter and current limiting system for power grid |
| 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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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161207 |