CN108206527A - A kind of series compensation system by SCR quick-switchings - Google Patents
A kind of series compensation system by SCR quick-switchings Download PDFInfo
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- CN108206527A CN108206527A CN201810113011.9A CN201810113011A CN108206527A CN 108206527 A CN108206527 A CN 108206527A CN 201810113011 A CN201810113011 A CN 201810113011A CN 108206527 A CN108206527 A CN 108206527A
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- isolation switch
- series compensation
- leading
- scr
- out terminal
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention relates to a kind of series compensation system by SCR quick-switchings, including series compensation capacitance C, electric discharge damper RL, bidirectional triode thyristor SCR, first, second and third isolation switch G1, G2, G3；The equal welding system end of incoming cables AL1 in the end of incoming cables of the first isolation switch G1 and third isolation switch G3, end of incoming cables of the leading-out terminal of first isolation switch G1 respectively with electric discharge damper RL, bidirectional triode thyristor SCR is connected, the leading-out terminal of electric discharge damper RL is connected with the end of incoming cables of series compensation capacitance C, series compensation capacitance C, controllable silicon SCR end of incoming cables of the leading-out terminal with the second isolation switch G2 be connected, the second isolation switch G2, third isolation switch G3 the equal welding system leading-out terminal AL2 of leading-out terminal.The present invention has many advantages, such as simple in structure, safe and reliable, by the induction reactance of series compensation capacitance C compensated lines, reduces the voltage drop on circuit, and then raising line end voltage, the stability of system is improved, so as to improve the comprehensive utilization ratio of electric energy.
Description
Technical field
The present invention relates to Power Network Compensation Technology field, especially a kind of series compensation systems by SCR quick-switchings.
Background technology
With the development of economy, the sharp increase of power load, the quality of voltage that mesohigh long distance transmission line is brought
Problem is 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 early stage
In the case that load is relatively light, still satisfied the use demand by terminal voltage；But with social progress and economic development, heavy users
It is continuously increased, the pressure drop of load current on the line significantly increases, and causes the supply voltage quality severe overweight to load, load
The line end voltage having during peak only has the 80% of rated voltage, causes neighbouring industry and residential electricity consumption equipment can not be normal
Operation, directly affects the production and life of this area people.
Invention content
The purpose of the present invention is to provide a kind of quality of voltage for improving circuit, increase power transmission distance and increase conveying energy
Power improves the stability of system, so as to improve the series compensation system by SCR quick-switchings of the comprehensive utilization ratio of electric energy.
To achieve the above object, present invention employs following technical schemes：A kind of series compensation system by SCR quick-switchings
System, including being used to offset the series compensation capacitance C of reactance in transmission line of electricity, discharge damper RL, bidirectional triode thyristor SCR, first
Isolation switch G1, the second isolation switch G2 and third isolation switch G3；The end of incoming cables of the first isolation switch G1 and third every
The leading-out terminal of the equal welding system end of incoming cables AL1 in end of incoming cables from disconnecting link G3, the first isolation switch G1 are respectively with electric discharge damper RL's
End of incoming cables, bidirectional triode thyristor SCR end of incoming cables be connected, the inlet wire of the leading-out terminal and series compensation capacitance C of electric discharge damper RL
End is connected, the end of incoming cables phase of the leading-out terminal of series compensation capacitance C, the leading-out terminal of controllable silicon SCR with the second isolation switch G2
Even, the leading-out terminal of the second isolation switch G2, the equal welding system leading-out terminal AL2 of leading-out terminal of third isolation switch G3.
The current limliting damper RL is in parallel and is formed by inductance L and resistance R.
The bidirectional triode thyristor SCR is made of two quick silicon-controlled inverse parallels, passes through the control being mounted in power distribution cabinet
Device controls it to cut-off.
The first isolation switch G1, the second isolation switch G2, third isolation switch G3 are installed in power distribution cabinet, are passed through
Manual operation realizes on/off switch action.
As shown from the above technical solution, the present invention has many advantages, such as simple in structure, safe and reliable, passes through series compensation capacitance
The induction reactance of C compensated lines reduces the voltage drop on circuit, and then improves line end voltage.The stability of system is improved, from
And improve the comprehensive utilization ratio of electric energy.
Description of the drawings
Fig. 1 is the electrical schematic diagram of the present invention.
Specific embodiment
As shown in Figure 1, a kind of series compensation system by SCR quick-switchings, including being used to offset reactance in transmission line of electricity
Series compensation capacitance C, electric discharge damper RL, bidirectional triode thyristor SCR, the first isolation switch G1, the second isolation switch G2 and the
Three isolation switch G3；The equal welding system inlet wire in end of incoming cables of the end of incoming cables and third isolation switch G3 of the first isolation switch G1
Hold AL1, the leading-out terminal of the first isolation switch G1 respectively with the end of incoming cables of damper RL of discharging, the end of incoming cables of bidirectional triode thyristor SCR
It is connected, the leading-out terminal of electric discharge damper RL is connected with the end of incoming cables of series compensation capacitance C, the outlet of series compensation capacitance C
End, controllable silicon SCR end of incoming cables of the leading-out terminal with the second isolation switch G2 be connected, the leading-out terminal of the second isolation switch G2, the
The equal welding system leading-out terminal AL2 of leading-out terminal of three isolation switch G3.
As shown in Figure 1, the first isolation switch G1, the second isolation switch G2, third isolation switch G3 are used to implement not
Interruption maintenance replaces component in cabinet, is installed in power distribution cabinet, realizes that on/off switch acts by manual operation.The series connection
Compensating electric capacity C is used to offset the reactance in transmission line of electricity, reduces the voltage drop on transmission line of electricity, improves the quality of voltage of circuit,
Power transmission distance and increase conveying capacity are increased, improves the stability of system.The current limliting damper RL is by inductance L and resistance R
Be in parallel composition, and the current limliting damper RL forms discharge prevention system, for limiting series compensation capacitance C by bidirectional triode thyristor
The intensity of electric energy release dash current stored after SCR short circuits, is prevented series compensation capacitance C from being damaged due to overcurrent, makes series connection
Compensating electric capacity C both end voltages can be limited in a relatively low level, and the capacity of such series compensation capacitance C can greatly contract
Subtract, cost can be greatly reduced naturally, while the volume of equipment has obtained effective control, solution electric power that can be fully effective
The quality of voltage problem of system long range heavy load transmission of electricity.The bidirectional triode thyristor SCR is by two quick silicon-controlled inverse parallel structures
Into it being controlled to cut-off by the controller being mounted in power distribution cabinet.When in circuit electric current be more than setting valve when, controller immediately to
Bidirectional triode thyristor SCR sends out combined floodgate order, and bidirectional triode thyristor SCR short circuit series compensation capacitance C immediately prevent series compensation capacitance
C is damaged due to overvoltage.
Operation principle of the present invention is as follows：During circuit normal operation, the real-time detection line of controller in line series compensation device
Road conveys the situation of load, and when detect in circuit electric current more than setting valve, controller is sent out point immediately to bidirectional triode thyristor SCR
Lock order puts into series compensation capacitance C in circuit, for offsetting the reactance in transmission line of electricity, reduces on transmission line of electricity
Voltage drop improves the quality of voltage of circuit, increases power transmission distance and increase conveying capacity, improves the stability of system.Work as line
When breaking down in road, controller sends out combined floodgate order, bidirectional triode thyristor SCR short circuit strings immediately to bidirectional triode thyristor SCR immediately
Join compensating electric capacity C, prevent series compensation capacitance C from being damaged due to overvoltage, while current limliting damper RL is electric for limiting series compensation
Hold the intensity that C is shorted its rear release dash current, prevent series compensation capacitance C from being damaged due to overcurrent.
In conclusion the present invention has many advantages, such as simple in structure, safe and reliable, pass through series compensation capacitance C compensated lines
Induction reactance, reduce circuit on voltage drop, and then improve line end voltage.The stability of system is improved, so as to improve
The comprehensive utilization ratio of electric energy.
Claims (4)
1. a kind of series compensation system by SCR quick-switchings, it is characterised in that：Including being used to offset reactance in transmission line of electricity
Series compensation capacitance C, electric discharge damper RL, bidirectional triode thyristor SCR, the first isolation switch G1, the second isolation switch G2 and third
Isolation switch G3；The equal welding system end of incoming cables in end of incoming cables of the end of incoming cables and third isolation switch G3 of the first isolation switch G1
The leading-out terminal of AL1, the first isolation switch G1 the end of incoming cables phase with the discharge end of incoming cables of damper RL, bidirectional triode thyristor SCR respectively
Connection, the leading-out terminal of electric discharge damper RL are connected with the end of incoming cables of series compensation capacitance C, the leading-out terminal of series compensation capacitance C,
End of incoming cables of the leading-out terminal of controllable silicon SCR with the second isolation switch G2 is connected, the leading-out terminal of the second isolation switch G2, third every
The equal welding system leading-out terminal AL2 of leading-out terminal from disconnecting link G3.
2. the series compensation system according to claim 1 by SCR quick-switchings, it is characterised in that：The current limliting damping
Device RL is in parallel and is formed by inductance L and resistance R.
3. the series compensation system according to claim 1 by SCR quick-switchings, it is characterised in that：It is described two-way controllable
Silicon SCR is made of two quick silicon-controlled inverse parallels, it is controlled to cut-off by the controller being mounted in power distribution cabinet.
4. the series compensation system according to claim 1 by SCR quick-switchings, it is characterised in that：First isolation
Disconnecting link G1, the second isolation switch G2, third isolation switch G3 are installed in power distribution cabinet, realize that on/off switch moves by manual operation
Make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113011.9A CN108206527A (en) | 2018-02-05 | 2018-02-05 | A kind of series compensation system by SCR quick-switchings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810113011.9A CN108206527A (en) | 2018-02-05 | 2018-02-05 | A kind of series compensation system by SCR quick-switchings |
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| Publication Number | Publication Date |
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| CN108206527A true CN108206527A (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810113011.9A Pending CN108206527A (en) | 2018-02-05 | 2018-02-05 | A kind of series compensation system by SCR quick-switchings |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110875159A (en) * | 2018-08-30 | 2020-03-10 | 贵州振华群英电器有限公司（国营第八九一厂） | Composite direct current switch capable of being physically disconnected and switching method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993814A (en) * | 1995-09-25 | 1997-04-04 | Nissin Electric Co Ltd | Control method for series capacitor in power system |
| CN205945069U (en) * | 2016-06-24 | 2017-02-08 | 安徽尚途电力保护设备有限公司 | High voltage electric network cascade compensation device |
| CN106786442A (en) * | 2016-12-30 | 2017-05-31 | 安徽徽电科技股份有限公司 | A kind of LC series resonances current-limiting apparatus |
| CN106899023A (en) * | 2017-03-10 | 2017-06-27 | 安徽尚途电力保护设备有限公司 | A kind of adjustable serial compensation system |
| CN206332444U (en) * | 2016-12-30 | 2017-07-14 | 安徽徽电科技股份有限公司 | A kind of LC series resonances current-limiting apparatus |
-
2018
- 2018-02-05 CN CN201810113011.9A patent/CN108206527A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993814A (en) * | 1995-09-25 | 1997-04-04 | Nissin Electric Co Ltd | Control method for series capacitor in power system |
| CN205945069U (en) * | 2016-06-24 | 2017-02-08 | 安徽尚途电力保护设备有限公司 | High voltage electric network cascade compensation device |
| CN106786442A (en) * | 2016-12-30 | 2017-05-31 | 安徽徽电科技股份有限公司 | A kind of LC series resonances current-limiting apparatus |
| CN206332444U (en) * | 2016-12-30 | 2017-07-14 | 安徽徽电科技股份有限公司 | A kind of LC series resonances current-limiting apparatus |
| CN106899023A (en) * | 2017-03-10 | 2017-06-27 | 安徽尚途电力保护设备有限公司 | A kind of adjustable serial compensation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110875159A (en) * | 2018-08-30 | 2020-03-10 | 贵州振华群英电器有限公司（国营第八九一厂） | Composite direct current switch capable of being physically disconnected and switching method |
| CN110875159B (en) * | 2018-08-30 | 2022-04-22 | 贵州振华群英电器有限公司（国营第八九一厂） | Composite direct current switch capable of being physically disconnected and switching method |
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Application publication date: 20180626 |
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