CN106849102A - A kind of mesohigh series compensation and depth current limiting system - Google Patents
A kind of mesohigh series compensation and depth current limiting system Download PDFInfo
- Publication number
- CN106849102A CN106849102A CN201710121776.2A CN201710121776A CN106849102A CN 106849102 A CN106849102 A CN 106849102A CN 201710121776 A CN201710121776 A CN 201710121776A CN 106849102 A CN106849102 A CN 106849102A
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- Prior art keywords
- switch
- compensation
- speed eddy
- current
- branch road
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of mesohigh series compensation and depth current limiting system, the line voltage distribution for compensation system voltage that the first high-speed eddy switch K1 and the first high-speed eddy switch K1 of line voltage distribution compensation branch road and current limliting branch road be in parallel is exited during including normally being run for system and compensates branch road, and the limiting short-circuit current after failure of being short-circuited for system being in parallel with line voltage distribution compensation branch road current limliting branch road；The line voltage distribution compensation branch route compensation capacitor C and the second high-speed eddy switch K2 are composed in series, and the current limliting branch route current-limiting reactor L and the 3rd high-speed eddy switch K3 are composed in series.The present invention has the advantages that simple structure, safe and reliable, can when system voltage is too low timely lifting system voltage；The significantly limiting short-circuit current when branch road is short-circuited failure, prevents the further expansion of short trouble scope, can realize rapid after short trouble excision exiting current-limiting reactor and playing a part of zero loss again.
Description
Technical field
The present invention relates to circuit on power system voltage compensation and limiting short-circuit current technical field, especially a kind of mesohigh
Series compensation and depth current limiting system.
Background technology
With expanding economy, the sharp increase of power load, the quality of voltage that mesohigh long distance transmission line brings
Problem is gradually exposed.For the less area of the density of population, radius of electricity supply is larger, and transmission line of electricity is generally more long.In early stage
In the case that load is relatively light, use demand is still met by terminal voltage；But with social progress and economic development, heavy users
It is continuously increased, load current pressure drop on the line is substantially increased, causes the supply voltage quality severe overweight to load, load
The line end voltage having during peak only has the 80% of rated voltage, cause near industry and residential electricity consumption equipment cannot be normal
Operation, can only compensate the loss of voltage of the electric energy in course of conveying, just can make vast industrial and mining enterprises and resident's productive life not
It is impacted.
With the sharp increase of electricity consumption power load, each branch road is short-circuited failure odds also with sharp increase, when
A certain bar branch road is short-circuited under bus, and short trouble can rapidly drag down busbar voltage and cause immeasurable damage to whole piece circuit
Lose, only quick significantly limiting short-circuit current prevents the further expansion of short trouble, just can guarantee that short in downstream leg generation
It is unaffected at bus during the failure of road.At present, effect of the existing series compensation device of in the market without limiting short-circuit current.
The content of the invention
It is fast it is an object of the invention to provide a kind of simple structure, safe and reliable, action, can be with the distribution sense of compensated line
It is anti-, the stability of system is improve, significantly limiting short-circuit current, prevent the mesohigh string of the further expansion of short trouble scope
Connection compensation and depth current limiting system.
To achieve the above object, present invention employs following technical scheme：A kind of mesohigh series compensation and depth current limliting
System, including the first high-speed eddy switch of line voltage distribution compensation branch road and current limliting branch road is exited when normally being run for system
The line voltage distribution for compensation system voltage that K1 and the first high-speed eddy switch K1 are in parallel compensates branch road, and and circuit
The current limliting branch road of what voltage compensation branch road was in parallel be short-circuited for system limiting short-circuit current after failure；The line voltage distribution
Compensation branch route compensation capacitor C and the second high-speed eddy switch K2 are composed in series, current limliting branch route current-limiting reactor L and
3rd high-speed eddy switch K3 is composed in series.
The first high-speed eddy switch K1, the second high-speed eddy switch K2, the 3rd high-speed eddy switch K3 by installation
Controller in power distribution cabinet controls it to cut-off.
The first high-speed eddy switch K1, the second high-speed eddy switch K2, the 3rd high-speed eddy switch K3 are vacuum
Arc extinguishing breaker.
First high-speed eddy switch K1, compensation capacitor C, the second high-speed eddy switch K2, current-limiting reactor L and the
Three high-speed eddies switch K3 is installed in power distribution cabinet.
One end of the compensation capacitor C is connected with the end of incoming cables AL1 of system, the other end of compensation capacitor C and second
The end of incoming cables of high-speed eddy switch K2 is connected, and second high-speed eddy switchs the leading-out terminal of K2 and the leading-out terminal AL2 phases of system
Even.
As shown from the above technical solution, there is the present invention simple structure, safe and reliable, saving transformer investment and operation to damage
The advantages of consumption, can when system voltage is too low timely lifting system voltage；Short circuit is significantly limited when branch road is short-circuited failure
Electric current, prevents the further expansion of short trouble scope, and current-limiting reactor is exited rapidly after short trouble excision can be realized again
Play a part of zero loss.
Brief description of the drawings
Fig. 1 is electrical schematic diagram of the invention.
Specific embodiment
As shown in figure 1, a kind of mesohigh series compensation and depth current limiting system, including exited when normally being run for system
Line voltage distribution compensates branch road and the first high-speed eddy switch K1 and the first high-speed eddy of current limliting branch road switch the use that K1 is in parallel
Branch road is compensated in the line voltage distribution of compensation system voltage, and it is short for system generation with what line voltage distribution compensation branch road was in parallel
The current limliting branch road of limiting short-circuit current after the failure of road；Line voltage distribution compensation branch route compensation capacitor C and the second high speed whirlpool
Stream switch K2 is composed in series, and the current limliting branch route current-limiting reactor L and the 3rd high-speed eddy switch K3 are composed in series.
As shown in figure 1, the first high-speed eddy switch K1, the second high-speed eddy switch K2, the 3rd high-speed eddy switch
K3 controls it to cut-off by the controller in power distribution cabinet.The first high-speed eddy switch K1, the second high-speed eddy are opened
Close K2, the 3rd high-speed eddy switch K3 and be vacuum extinction breaker.First high-speed eddy switch K1, compensation capacitor C,
Second high-speed eddy switch K2, current-limiting reactor L and the 3rd high-speed eddy switch K3 are installed in power distribution cabinet.The compensation electricity
One end of container C is connected with the end of incoming cables AL1 of system, and the other end of compensation capacitor C enters with the second high-speed eddy switch K2's
Line end is connected, and the leading-out terminal of the second high-speed eddy switch K2 is connected with the leading-out terminal AL2 of system.
Operation principle of the invention is as follows：When controller detect line voltage distribution it is too low when, order the first high-speed eddy open
Close K1 quickly to disconnect, the second high-speed eddy switch K2 rapid closings make compensation capacitor C quickly put into, by compensation capacitor C
The voltage of this branch road is lifted near rated voltage rapidly.When controller is detected the first high speed when terminal voltage recovers
Vortex switch K1 rapid closings, then disconnect the second high-speed eddy switch K2, prevent overcompensation situation；When controller inspection
Measure the branch road and the 3rd high-speed eddy switch K3 rapid closings during short circuit occur, the first high-speed eddy switch K1 disconnects will limit rapidly
Stream reactor L after input, fault branch short circuit current is substantially reduced rapidly.After short trouble is removed, controller control
First high-speed eddy switch K1 is closed immediately, and then the 3rd high-speed eddy switch K3 is disconnected, and current-limiting reactor L is exited, and is prevented
Current-limiting reactor L puts into the actual motion problem of a large amount of reactive loss of consumption and user terminal brownout for a long time.
Claims (5)
1. a kind of mesohigh series compensation and depth current limiting system, it is characterised in that：Exited during including normally being run for system
Line voltage distribution compensates branch road and the first high-speed eddy switch K1 and the first high-speed eddy of current limliting branch road switch the use that K1 is in parallel
Branch road is compensated in the line voltage distribution of compensation system voltage, and it is short for system generation with what line voltage distribution compensation branch road was in parallel
The current limliting branch road of limiting short-circuit current after the failure of road；Line voltage distribution compensation branch route compensation capacitor C and the second high speed whirlpool
Stream switch K2 is composed in series, and the current limliting branch route current-limiting reactor L and the 3rd high-speed eddy switch K3 are composed in series.
2. mesohigh series compensation according to claim 1 and depth current limiting system, it is characterised in that：Described first at a high speed
Vortex switch K1, the second high-speed eddy switch K2, the 3rd high-speed eddy switch K3 by the controller control in power distribution cabinet
It is made to cut-off.
3. mesohigh series compensation according to claim 1 and depth current limiting system, it is characterised in that：Described first at a high speed
Vortex switch K1, the second high-speed eddy switch K2, the 3rd high-speed eddy switch K3 are vacuum extinction breaker.
4. mesohigh series compensation according to claim 1 and depth current limiting system, it is characterised in that：Described first at a high speed
Vortex switch K1, compensation capacitor C, the second high-speed eddy switch K2, current-limiting reactor L and the 3rd high-speed eddy switch K3 pacify
In power distribution cabinet.
5. mesohigh series compensation according to claim 1 and depth current limiting system, it is characterised in that：The compensating electric capacity
One end of device C is connected with the end of incoming cables AL1 of system, the inlet wire of the other end of compensation capacitor C and the second high-speed eddy switch K2
End is connected, and the leading-out terminal of the second high-speed eddy switch K2 is connected with the leading-out terminal AL2 of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121776.2A CN106849102A (en) | 2017-03-02 | 2017-03-02 | A kind of mesohigh series compensation and depth current limiting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121776.2A CN106849102A (en) | 2017-03-02 | 2017-03-02 | A kind of mesohigh series compensation and depth current limiting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849102A true CN106849102A (en) | 2017-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710121776.2A Pending CN106849102A (en) | 2017-03-02 | 2017-03-02 | A kind of mesohigh series compensation and depth current limiting system |
Country Status (1)
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| CN (1) | CN106849102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394788A (en) * | 2017-09-06 | 2017-11-24 | 安徽徽电科技股份有限公司 | A kind of voltage compensating device based on segmented series capacitor |
| CN108054733A (en) * | 2017-12-18 | 2018-05-18 | 安徽伊格瑞德电气设备有限公司 | One kind is based on LC electric discharge concussion voltage retaining devices |
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| JP2000312436A (en) * | 1999-04-27 | 2000-11-07 | Toshiba Corp | Current limiting device |
| JP2006296080A (en) * | 2005-04-11 | 2006-10-26 | Meidensha Corp | Control method for instantaneous voltage drop compensation device |
| CN201946982U (en) * | 2011-02-23 | 2011-08-24 | 福建省电力有限公司宁德电业局 | 10kV distribution line serial compensation and voltage regulation device based on an adaptive control |
| CN202503293U (en) * | 2012-03-12 | 2012-10-24 | 青海电力科学试验研究院 | Dynamic reactive power compensation device for long-distance transmission line of power grid |
| US20140009127A1 (en) * | 2012-07-09 | 2014-01-09 | Mitsubishi Electric Corporation | Static var compensator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394788A (en) * | 2017-09-06 | 2017-11-24 | 安徽徽电科技股份有限公司 | A kind of voltage compensating device based on segmented series capacitor |
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