CN207801466U - A kind of high pressure self-shield string benefit current limiting system - Google Patents
A kind of high pressure self-shield string benefit current limiting system Download PDFInfo
- Publication number
- CN207801466U CN207801466U CN201820200663.1U CN201820200663U CN207801466U CN 207801466 U CN207801466 U CN 207801466U CN 201820200663 U CN201820200663 U CN 201820200663U CN 207801466 U CN207801466 U CN 207801466U
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- isolation switch
- current
- controllable silicon
- leading
- incoming cables
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- 230000008901 benefit Effects 0.000 title description 5
- 238000002955 isolation Methods 0.000 claims abstract description 52
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 39
- 239000010703 silicon Substances 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 claims description 3
- 101150105073 SCR1 gene Proteins 0.000 claims description 3
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000006698 induction Effects 0.000 abstract description 8
- 230000009977 dual effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 description 1
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model is related to a kind of high pressure self-shield strings to mend current limiting system, including the first isolation switch G1, the second isolation switch G2, third isolation switch G3, series capacitor C, current-limiting reactor L, the first controllable silicon SCR 1, the second controllable silicon SCR 2 and protection fuse FU.There is the utility model string to mend and current limliting dual function, it not only can be by series compensation capacitor come the distribution induction reactance of compensated line, improve system stability, improve line voltage distribution quality, increase power transmission distance and ability of supplying electric power, and then improve the comprehensive utilization ratio of electric energy, the intensity of current-limiting reactor limiting short-circuit current can also be passed through, reduce impact of the short circuit current to power equipment in electric system, avoids the further expansion of short trouble.The utility model has the characteristics that simple in structure, safe and reliable.
Description
Technical field
The utility model is related to electric power system power distribution equipment current limiting technique fields, and in particular to a kind of high pressure self-shield string benefit
Current limiting system.
Background technology
With the development of economy, the growth of electric load also therewith drastically, the voltage that mesohigh long distance transmission line is brought
Quality problems are gradually exposed.For the smaller area of the density of population, radius of electricity supply is larger, and transmission line of electricity is generally longer.
In the case that early stage load is relatively light, still satisfied the use demand by terminal voltage；But with social progress and economic development, heavy duty
User is continuously increased, and the pressure drop of load current on the line obviously increases, and causes to severely exceed the supply voltage quality of load,
The line end voltage having when load peak only has the 80% of rated voltage, causes neighbouring industry and residential electricity consumption equipment cannot
Normal operation directly affects the production and life of this area people.
It is well known that when short trouble occurs for electric system, short circuit current is generally tens times of rated current or even up to a hundred
Times, with the sharp increase of electric load, continuous increased short circuit current is increasing to the impact of electric system electrical equipment；Together
When, the connecting-disconnecting function of existing breaker, which has been difficult to meet, cut-offs huge short circuit current.Therefore, to solve this great difficult problem,
Current-limiting reactor is concatenated the mode in circuit and is widely used in electric system electrical power trans mission/distribution system.Current-limiting reactor is connected on back
Though in road can limiting short-circuit current intensity, reduce impact of the short circuit current to electrical equipment in electric system, and maintain busbar
Voltage avoids the further expansion of short trouble.But series connection current-limiting reactor has many shortcomings, first, current-limiting reactor
Huge reactive loss is generated in device series loop also causes prodigious financial burden to user；Secondly, current-limiting reactor is being chosen
When the reactance value of device, often there is the requirement of limiting short-circuit current is met after, the lance of user terminal brownout under rated current
Shield.During the long distance delivery of electric system transmission and distribution network, transmission line of electricity also will produce induction reactance, substantially equally form
A kind of stealthy, potential reactor concatenated in user load circuit, equally causes the reduction of user terminal voltage, while having again larger
Reactive loss.
Utility model content
The purpose of this utility model is to provide a kind of high pressure self-shield strings to mend current limiting system, which can not only pass through
Series compensation capacitor carrys out the distribution induction reactance of compensated line, improves system stability, improves line voltage distribution quality, increase power transmission away from
From and ability of supplying electric power, and then improve electric energy comprehensive utilization ratio, can also by the intensity of current-limiting reactor limiting short-circuit current,
Reduce impact of the short circuit current to power equipment in electric system, avoids the further expansion of short trouble.
To achieve the above object, the utility model uses following technical scheme：
A kind of high pressure self-shield string benefit current limiting system, including the isolation of the first isolation switch G1, the second isolation switch G2, third
Disconnecting link G3, series capacitor C, current-limiting reactor L, the first controllable silicon SCR 1, the second controllable silicon SCR 2 and protection fuse FU.It is described
The end of incoming cables of the inlet wire termination third isolation switch G3 of first isolation switch G1, the end of incoming cables of outlet termination protection fuse FU.Institute
The outlet for stating third isolation switch G3 terminates the leading-out terminal of the second isolation switch G2.The end of incoming cables of the series capacitor C and limit
The end of incoming cables for flowing reactor L is connected as common point a.The outlet of the series capacitor C terminate the first controllable silicon SCR 1 into
Line end.The leading-out terminal for stating protection fuse FU is connected with common point a.The leading-out terminal of first controllable silicon SCR 1 and second silicon-controlled
The leading-out terminal of SCR2, which is connected, is used as common point b.The leading-out terminal of the inlet wire termination current-limiting reactor L of second controllable silicon SCR 2.
The end of incoming cables of the isolation switch G2 is connected with common point b.
The first isolation switch G1, the second isolation switch G2 and third isolation switch G3, for realizing service without power-off
Or the component in replacement power distribution cabinet.The series capacitor C, for the induction reactance in compensated line.The current-limiting reactor L,
Impact strength for limiting short-circuit current.First controllable silicon SCR 1, the throwing for controlling series capacitor C are moved back.It is described
Second controllable silicon SCR 2, the throwing for controlling current-limiting reactor L are moved back.The protection fuse FU, for controlling series electrical when short circuit
Container C and current-limiting reactor L's puts into operation the time, and series capacitor C and current-limiting reactor L is effectively prevent to be damaged because of overcurrent
It is bad.
Further, it further includes inlet wire and outlet which, which mends current limiting system, and inlet wire is isolated with first respectively
The end of incoming cables of disconnecting link G1, the end of incoming cables of third isolation switch G3 are connected, outlet respectively with the leading-out terminal of the second isolation switch G2, the
The leading-out terminal of three isolation switch G3 is connected.
Further, first controllable silicon SCR, 1 and second controllable silicon SCR 2 is bidirectional triode thyristor, this is two-way controllable
Silicon includes two antiparallel silicon-controlled, and controls it by the controller in power distribution cabinet and cut-off.
Further, the first isolation switch G1, the second isolation switch G2 and third isolation switch G3 are installed in and match
In electric cabinet, and separating brake action is realized by manual operation.
By above technical scheme it is found that the utility model has string benefit and current limliting dual function, it can not only pass through series connection
Compensation capacitor carrys out the distribution induction reactance of compensated line, improves system stability, improves line voltage distribution quality, increase power transmission distance and
Ability of supplying electric power, and then the comprehensive utilization ratio of electric energy is improved, it can also be reduced by the intensity of current-limiting reactor limiting short-circuit current
Impact of the short circuit current to power equipment in electric system avoids the further expansion of short trouble.The utility model has knot
The features such as structure is simple, safe and reliable.
Description of the drawings
Fig. 1 is the electrical schematic diagram of the utility model.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings：
A kind of high pressure self-shield string as shown in Figure 1 mends current limiting system, including the first isolation switch G1, the second isolation switch
G2, third isolation switch G3, series capacitor C, current-limiting reactor L, the first controllable silicon SCR 1, the second controllable silicon SCR 2 and protection
Fuse FU.The end of incoming cables of the inlet wire termination third isolation switch G3 of the first isolation switch G1, outlet termination protection fuse FU
End of incoming cables.The outlet of the third isolation switch G3 terminates the leading-out terminal of the second isolation switch G2.The series capacitor C's
End of incoming cables is connected with the end of incoming cables of current-limiting reactor L is used as common point a.The outlet termination first of the series capacitor C is controllable
The end of incoming cables of silicon SCR1.The leading-out terminal for stating protection fuse FU is connected with common point a.The leading-out terminal of first controllable silicon SCR 1 and
The leading-out terminal of second controllable silicon SCR 2, which is connected, is used as common point b.The inlet wire termination current-limiting reactor L of second controllable silicon SCR 2
Leading-out terminal.The end of incoming cables of the isolation switch G2 is connected with common point b.
The first isolation switch G1, the second isolation switch G2 and third isolation switch G3, for realizing service without power-off
Or the component in replacement power distribution cabinet.The series capacitor C, for the induction reactance in compensated line.The current-limiting reactor L,
Impact strength for limiting short-circuit current.First controllable silicon SCR 1, the throwing for controlling series capacitor C are moved back.It is described
Second controllable silicon SCR 2, the throwing for controlling current-limiting reactor L are moved back.The protection fuse FU, for controlling series electrical when short circuit
Container C and current-limiting reactor L's puts into operation the time, and series capacitor C and current-limiting reactor L is effectively prevent to be damaged because of overcurrent
It is bad.
Further, it further includes inlet wire and outlet which, which mends current limiting system, and inlet wire is isolated with first respectively
The end of incoming cables of disconnecting link G1, the end of incoming cables of third isolation switch G3 are connected, outlet respectively with the leading-out terminal of the second isolation switch G2, the
The leading-out terminal of three isolation switch G3 is connected.
Further, first controllable silicon SCR, 1 and second controllable silicon SCR 2 is bidirectional triode thyristor, this is two-way controllable
Silicon includes two antiparallel silicon-controlled, and controls it by the controller in power distribution cabinet and cut-off.
Further, the first isolation switch G1, the second isolation switch G2 and third isolation switch G3 are installed in and match
In electric cabinet, and separating brake action is realized by manual operation.
The operation principle of the utility model is：
The utility model controls the first controllable silicon SCR 1 by controller in device, second controllable silicon SCR 2 leads through and off
It opens, realizes that series capacitor C and the throwing of current-limiting reactor L are moved back.When normal operation, compensating line is used for by series capacitor C
Induction reactance in road improves the stability of system with the distribution induction reactance of compensated line, improves the quality of voltage of circuit, increase power transmission away from
From with increase conveying capacity, improve the comprehensive utilization ratio of electric energy.Controller is immediately when short trouble occurs for circuit, in device
It drives the first controllable silicon SCR 1 to disconnect, the conducting of the second controllable silicon SCR 2, series capacitor C is made to exit, current-limiting reactor L inputs,
By current-limiting reactor L can effectively limiting short-circuit current intensity, reduce short circuit current electrical equipment in electric system is rushed
It hits, avoids the further expansion of short trouble.
Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various modifications and improvement that the technical solution of utility model is made should all fall into the protection of the utility model claims book determination
In range.
Claims (4)
1. a kind of high pressure self-shield string mends current limiting system, it is characterised in that：Including the first isolation switch G1, the second isolation switch
G2, third isolation switch G3, series capacitor C, current-limiting reactor L, the first controllable silicon SCR 1, the second controllable silicon SCR 2 and protection
Fuse FU；The end of incoming cables of the inlet wire termination third isolation switch G3 of the first isolation switch G1, outlet termination protection fuse FU
End of incoming cables；The outlet of the third isolation switch G3 terminates the leading-out terminal of the second isolation switch G2；The series capacitor C's
End of incoming cables is connected with the end of incoming cables of current-limiting reactor L is used as common point a；The outlet termination first of the series capacitor C is controllable
The end of incoming cables of silicon SCR1；The leading-out terminal of the protection fuse FU is connected with common point a；The leading-out terminal of first controllable silicon SCR 1
It is connected with the leading-out terminal of the second controllable silicon SCR 2 and is used as common point b；The inlet wire of second controllable silicon SCR 2 terminates current-limiting reactor
The leading-out terminal of device L；The end of incoming cables of the isolation switch G2 is connected with common point b.
2. a kind of high pressure self-shield string according to claim 1 mends current limiting system, it is characterised in that：The high pressure self-shield string
To mend current limiting system further include inlet wire and outlet, inlet wire respectively with the end of incoming cables of the first isolation switch G1, third isolation switch G3
End of incoming cables is connected, and outlet is connected with the leading-out terminal of the leading-out terminal of the second isolation switch G2, third isolation switch G3 respectively.
3. a kind of high pressure self-shield string according to claim 1 mends current limiting system, it is characterised in that：Described first is silicon-controlled
SCR1 and the second controllable silicon SCR 2 are bidirectional triode thyristor, which includes two antiparallel silicon-controlled, and is passed through
Controller in power distribution cabinet controls it and cut-offs.
4. a kind of high pressure self-shield string according to claim 1 mends current limiting system, it is characterised in that：First isolation knife
Lock G1, the second isolation switch G2 and third isolation switch G3 are installed in power distribution cabinet, and realize that separating brake is dynamic by manual operation
Make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820200663.1U CN207801466U (en) | 2018-02-05 | 2018-02-05 | A kind of high pressure self-shield string benefit current limiting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820200663.1U CN207801466U (en) | 2018-02-05 | 2018-02-05 | A kind of high pressure self-shield string benefit current limiting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207801466U true CN207801466U (en) | 2018-08-31 |
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ID=63268922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820200663.1U Expired - Fee Related CN207801466U (en) | 2018-02-05 | 2018-02-05 | A kind of high pressure self-shield string benefit current limiting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207801466U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199361A (en) * | 2018-02-05 | 2018-06-22 | 安徽徽电科技股份有限公司 | A kind of high pressure self-shield string mends current limiting system |
-
2018
- 2018-02-05 CN CN201820200663.1U patent/CN207801466U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199361A (en) * | 2018-02-05 | 2018-06-22 | 安徽徽电科技股份有限公司 | A kind of high pressure self-shield string mends current limiting system |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180831 |