CN106899023A - A kind of adjustable serial compensation system - Google Patents
A kind of adjustable serial compensation system Download PDFInfo
- Publication number
- CN106899023A CN106899023A CN201710142802.XA CN201710142802A CN106899023A CN 106899023 A CN106899023 A CN 106899023A CN 201710142802 A CN201710142802 A CN 201710142802A CN 106899023 A CN106899023 A CN 106899023A
- Authority
- CN
- China
- Prior art keywords
- incoming cables
- contactor
- leading
- power distribution
- distribution cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- 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
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- 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
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of adjustable serial compensation system, including the capacitor bank being made up of electric capacity and contactor, the end of incoming cables of the capacitor bank is connected through discharge damper RL, isolation switch G1 with the end of incoming cables AL1 of power distribution cabinet successively, and its leading-out terminal is connected by isolation switch G2 with the leading-out terminal AL2 of power distribution cabinet；Bidirectional triode thyristor SCR, one end of high-speed eddy switch K0 and nonlinear resistance zinc oxide FR are connected with the end of incoming cables of electric discharge damper RL, and its other end is connected with the leading-out terminal of capacitor bank.It is simple structure of the present invention, safe and reliable, the size of load is conveyed according to circuit, the series capacitor of circuit different capabilities can be put into, improve the quality of voltage of circuit, power transmission distance and increase conveying capacity are increased, the stability of system is improve, so as to improve the comprehensive utilization ratio of electric energy；Duplicate protection of the K0 realizations to series capacitor group is switched by bidirectional triode thyristor SCR and high-speed eddy, prevents capacitor from being damaged because of overvoltage.
Description
Technical field
The present invention relates to electric power system power distribution equipment current limiting technique field, and in particular to a kind of adjustable serial compensation system
System.
Background technology
With expanding economy, with the sharp increase of electric load, the increase of net capacity, the short circuit current for constantly increasing
Impact to power system electrical equipment is increasing；Meanwhile, the connecting-disconnecting function of existing breaker be difficult to satisfaction cut-off it is huge
Big short circuit current.Therefore to solve this great difficult problem, the mode that current-limiting reactor is concatenated in loop is widely used in electric power
In system electrical power trans mission/distribution system.Though current-limiting reactor series connection in the loop can limiting short-circuit current intensity, reduce short circuit current to electricity
The impact of electrical equipment in Force system, and maintain busbar voltage, it is to avoid the further expansion of short trouble.But series connection current limliting electricity
Anti- device but has many weak points, first, produces huge reactive loss also to be caused to user in current-limiting reactor series loop
Very big financial burden；Secondly, when the reactance value of current-limiting reactor is chosen, often exist and meet wanting for limiting short-circuit current
After asking, the contradiction of user terminal brownout under rated current.During the long distance delivery of power system transmission and distribution network, power transmission line
Road can also produce induction reactance, the reactor in a kind of stealthy, potential concatenation user load loop substantially equally formd, together
Sample causes the reduction of user terminal voltage, while there is larger reactive loss again.
The content of the invention
It is an object of the invention to provide a kind of adjustable serial compensation system, the system can convey load according to circuit
Size, puts into the capacitor of circuit different capabilities, improves the quality of voltage of circuit, increases power transmission distance and increase conveying capacity,
The reliability and security of power supply are improved, so as to improve the comprehensive utilization ratio of electric energy.
To achieve the above object, present invention employs following technical scheme：Including bidirectional triode thyristor SCR, nonlinear resistance
Zinc oxide FR, capacitor bank and electric discharge damper RL, the capacitor bank include electric capacity C1, electric capacity C2 and electric capacity C3, the electricity
Hold one end parallel connection of C1, electric capacity C2, electric capacity C3, the parallel connected end is parallel connected end a, and the other end and the contactor K1 of capacitor C1 go here and there
Connection, electric capacity C2 connects with contactor K2, and electric capacity C3 connects with contactor K3, and the other end of contactor K1, K2, K3 is in parallel, and this is simultaneously
Connection end is parallel connected end b；The end of incoming cables of the electric discharge damper RL is connected by isolation switch G1 with the end of incoming cables AL1 of power distribution cabinet,
Its outlet terminates parallel connected end a, and parallel connected end b is connected by isolation switch G2 with the leading-out terminal AL2 of power distribution cabinet；The bidirectional triode thyristor
One end of SCR is connected with the end of incoming cables of electric discharge damper RL, its another termination parallel connected end b；The nonlinear resistance zinc oxide FR
One end be connected with the end of incoming cables of electric discharge damper RL, its other end is connected with parallel connected end b；High-speed eddy switch K0 one end with
The end of incoming cables of electric discharge damper RL is connected, its another termination parallel connected end b.
In such scheme, also including isolation switch G3, one end of the isolation switch G3 and the end of incoming cables AL1 phases of power distribution cabinet
Even, its other end is connected with the leading-out terminal AL2 of power distribution cabinet.
In such scheme, the electric discharge damper RL is in parallel and is constituted by inductance L and resistance R, the electric discharge damper RL
End of incoming cables be connected with the leading-out terminal of isolation switch G1, its leading-out terminal is connected with the end of incoming cables of capacitor bank.
In such scheme, the first electrode of the bidirectional triode thyristor SCR is connected with the end of incoming cables of electric discharge damper RL, and it the
Two electrodes are connected with the leading-out terminal of contactor K1, K2, K3, and its control end is connected with the controller in power distribution cabinet.
In such scheme, the high-speed eddy switch K0 is vortex driving, vacuum extinction breaker.
In such scheme, the high-speed eddy switch K0, contactor K1, contactor K2, contactor K3 are by being arranged on
Controller in power distribution cabinet controls its on/off switch.
As shown from the above technical solution, simple structure of the present invention, safe and reliable, the size of load is conveyed according to circuit, can
The series capacitor of circuit different capabilities is put into, improves the quality of voltage of circuit, increase power transmission distance and increase conveying capacity, carried
The stability of system high, so as to improve the comprehensive utilization ratio of electric energy；K0 is switched by bidirectional triode thyristor SCR and high-speed eddy
The duplicate protection to series capacitor group is realized, prevents series capacitor group from being damaged because of overvoltage.
Brief description of the drawings
Fig. 1 is electrical schematic diagram of the invention.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, the adjustable serial compensation system of the present embodiment, including bidirectional triode thyristor SCR, nonlinear resistance zinc oxide
FR, capacitor bank and electric discharge damper RL, capacitor bank include electric capacity C1, electric capacity C2 and electric capacity C3, electric capacity C1, electric capacity C2, electricity
The one end for holding C3 is in parallel, and the parallel connected end is parallel connected end a, and the other end of capacitor C1 is connected with contactor K1, electric capacity C2 with contact
Device K2 connects, and electric capacity C3 connects with contactor K3, and the other end of contactor K1, K2, K3 is in parallel, and the parallel connected end is parallel connected end b；Put
The end of incoming cables of electrical deoscillator RL is connected by isolation switch G1 with the end of incoming cables AL1 of power distribution cabinet, its outlet termination parallel connected end a, and
Connection end b is connected by isolation switch G2 with the leading-out terminal AL2 of power distribution cabinet；One end of bidirectional triode thyristor SCR and electric discharge damper RL
End of incoming cables be connected, its another termination parallel connected end b；One end of high-speed eddy switch K0 and the end of incoming cables phase of electric discharge damper RL
Even, its another termination parallel connected end b.
One end of nonlinear resistance zinc oxide FR is connected with the end of incoming cables of electric discharge damper RL, its other end and parallel connected end b
It is connected；Nonlinear resistance zinc oxide FR is used for the voltage of limiting capacitance device group after line short, makes the electricity at capacitor bank two ends
It is certain value to press, and effectively prevents capacitor bank from being damaged due to excessively stream.
The present embodiment also includes isolation switch G3, and one end of isolation switch G3 is connected with the end of incoming cables AL1 of power distribution cabinet, its
The other end is connected with the leading-out terminal AL2 of power distribution cabinet.Service without power-off is realized by isolation switch G1, G2, G3, reduces maintenance repair
With the power failure range of trouble hunting, greatly improve the reliability and security of power supply, at the same avoid because interruption maintenance bring through
Ji loss.
The electric discharge damper RL is in parallel and is constituted by inductance L and resistance R, the end of incoming cables of electric discharge damper RL and isolation switch
The leading-out terminal of G1 is connected, and its leading-out terminal is connected with the end of incoming cables of capacitor bank.Electric discharge damper RL is used for limiting capacitance device group
Discharge impact electric current, prevent capacitor bank from being damaged due to excessively stream, enable capacitor bank both end voltage be limited in one compared with
Low level, the capacity of such capacitor bank can greatly reduce, and its cost can be greatly reduced naturally, while the volume of equipment
Obtained effective control, can be fully effective solve the problems, such as power system long range heavy load transmission of electricity quality of voltage.
High-speed eddy switch K0, contactor K1, contactor K2, contactor K3 are connected with the controller in power distribution cabinet, lead to
Cross controller and control its on/off switch, the present embodiment, high-speed eddy switch K0 is vortex driving, vacuum extinction breaker.
Further, the first electrode of bidirectional triode thyristor SCR is connected with the end of incoming cables of electric discharge damper RL, its second electrode
Leading-out terminal with contactor K1, K2, K3 is connected, and its control end is connected with the controller in power distribution cabinet, is controlled by controller double
To cut-offfing for controllable silicon SCR.Bidirectional triode thyristor SCR and nonlinear resistance zinc oxide FR constitutes first and protects again, high-speed eddy
Switch K0 and nonlinear resistance zinc oxide FR constitutes second and protects again, and series capacitor group can be further improved by duplicate protection
Security.
Isolation switch G1, G2, G3 are connected with the operating mechanism in power distribution cabinet, are cut-off by manually controlling it,
The isolation switch G1, G2, G3 realize component in interruption maintenance or more changing device, greatly improve the reliability and safety of power supply
Property, while avoiding because interruption maintenance brings economic loss.
Operation principle of the invention is as follows：
When circuit normally runs, the size of load is conveyed according to circuit, by the controller control contactor K1 in power distribution cabinet, connect
Tentaculum K2, the throwing of the various combination of contactor K3 are moved back, and can put into the series capacitor of circuit different capabilities, realize that circuit series connection is mended
Adjustability is repaid, improves the quality of voltage of circuit, increase power transmission distance and increase conveying capacity, improve the stability of system, from
And improve the comprehensive utilization ratio of electric energy.
When be short-circuited failure when, when capacitor bank terminal voltage exceed nonlinear resistance zinc oxide FR conducting voltages when,
Nonlinear resistance zinc oxide FR is turned on immediately, and the voltage for making capacitor bank two ends is certain value；Controller stands in simultaneity factor
Reclosing command is sent to bidirectional triode thyristor SCR and high-speed eddy switch K0, bidirectional triode thyristor SCR is in 200us by capacitor
Group short circuit, high-speed eddy switchs K0 in 2ms by capacitor bank short circuit, after high-speed eddy switch K0 closes a floodgate, by high-speed eddy
Switch K0 continues shorted capacitor group, realizes the duplicate protection of capacitor bank.Switched by bidirectional triode thyristor SCR and high-speed eddy
The duplicate protection of K0, can effectively prevent capacitor bank from being damaged due to overvoltage；After capacitor bank is protected, discharge damper RL
For limiting the discharge impact electric current to capacitor bank, prevent capacitor bank from being damaged due to excessively stream.After short trouble cuts off,
When line current returns to normal value, controller sends separating brake and instructs to high-speed eddy switch K0 immediately in system, and high-speed eddy is opened
K0 separating brakes immediately are closed, series capacitor group is put into circuit and is run.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to model of the invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art are to technical side of the invention
Various modifications and improvement that case is made, all should fall into the protection domain of claims of the present invention determination.
Claims (6)
1. a kind of adjustable serial compensation system, it is characterised in that：Including bidirectional triode thyristor SCR, nonlinear resistance zinc oxide FR,
Capacitor bank and electric discharge damper RL, the capacitor bank include electric capacity C1, electric capacity C2 and electric capacity C3, the electric capacity C1, electric capacity
C2, electric capacity C3 one end it is in parallel, the parallel connected end is parallel connected end a, and the other end of capacitor C1 is connected with contactor K1, electric capacity C2 and
Contactor K2 connects, and electric capacity C3 connects with contactor K3, and the other end of contactor K1, K2, K3 is in parallel, and the parallel connected end is parallel connected end
b；The end of incoming cables of the electric discharge damper RL is connected by isolation switch G1 with the end of incoming cables AL1 of power distribution cabinet, and its outlet is terminated simultaneously
Join end a, parallel connected end b is connected by isolation switch G2 with the leading-out terminal AL2 of power distribution cabinet；One end of the bidirectional triode thyristor SCR with
The end of incoming cables of electric discharge damper RL is connected, its another termination parallel connected end b；One end of the nonlinear resistance zinc oxide FR and electric discharge
The end of incoming cables of damper RL is connected, and its other end is connected with parallel connected end b；One end of high-speed eddy switch K0 and electric discharge damper RL
End of incoming cables be connected, its another termination parallel connected end b.
2. adjustable serial compensation system according to claim 1, it is characterised in that：It is described also including isolation switch G3
One end of isolation switch G3 is connected with the end of incoming cables AL1 of power distribution cabinet, and its other end is connected with the leading-out terminal AL2 of power distribution cabinet.
3. adjustable serial compensation system according to claim 1, it is characterised in that：The electric discharge damper RL is by inductance
L and resistance R are in parallel composition, and the end of incoming cables of the electric discharge damper RL is connected with the leading-out terminal of isolation switch G1, its leading-out terminal
It is connected with the end of incoming cables of capacitor bank.
4. adjustable serial compensation system according to claim 1, it is characterised in that：The of the bidirectional triode thyristor SCR
One electrode is connected with the end of incoming cables of electric discharge damper RL, and its second electrode is connected with the leading-out terminal of contactor K1, K2, K3, its control
End processed is connected with the controller in power distribution cabinet.
5. adjustable serial compensation system according to claim 1, it is characterised in that：The high-speed eddy switch K0 is whirlpool
Stream drives, vacuum extinction breaker.
6. adjustable serial compensation system according to claim 1, it is characterised in that：The high-speed eddy switchs K0, connects
Tentaculum K1, contactor K2, contactor K3 control its on/off switch by the controller in power distribution cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142802.XA CN106899023A (en) | 2017-03-10 | 2017-03-10 | A kind of adjustable serial compensation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142802.XA CN106899023A (en) | 2017-03-10 | 2017-03-10 | A kind of adjustable serial compensation system |
Publications (1)
| Publication Number | Publication Date |
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| CN106899023A true CN106899023A (en) | 2017-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710142802.XA Pending CN106899023A (en) | 2017-03-10 | 2017-03-10 | A kind of adjustable serial compensation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106899023A (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 |
| CN108206527A (en) * | 2018-02-05 | 2018-06-26 | 安徽徽电科技股份有限公司 | A kind of series compensation system by SCR quick-switchings |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659759A (en) * | 1992-08-06 | 1994-03-04 | Hitachi Ltd | Series capacitor compensating device and control device therefor |
| CN105119299A (en) * | 2015-08-26 | 2015-12-02 | 安徽徽电科技股份有限公司 | Middle and high voltage power grid distributed series compensation system |
| CN105958501A (en) * | 2016-06-24 | 2016-09-21 | 安徽徽电科技股份有限公司 | Adjustable series-wound compensation apparatus for high-voltage power grid |
| CN106099938A (en) * | 2016-06-24 | 2016-11-09 | 安徽尚途电力保护设备有限公司 | A kind of high-voltage fence series compensation device |
| CN205829172U (en) * | 2016-06-24 | 2016-12-21 | 安徽徽电科技股份有限公司 | A kind of high-voltage fence adjustable serial compensation device |
| CN206517068U (en) * | 2017-03-10 | 2017-09-22 | 安徽尚途电力保护设备有限公司 | A kind of adjustable serial compensation system |
-
2017
- 2017-03-10 CN CN201710142802.XA patent/CN106899023A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659759A (en) * | 1992-08-06 | 1994-03-04 | Hitachi Ltd | Series capacitor compensating device and control device therefor |
| CN105119299A (en) * | 2015-08-26 | 2015-12-02 | 安徽徽电科技股份有限公司 | Middle and high voltage power grid distributed series compensation system |
| CN105958501A (en) * | 2016-06-24 | 2016-09-21 | 安徽徽电科技股份有限公司 | Adjustable series-wound compensation apparatus for high-voltage power grid |
| CN106099938A (en) * | 2016-06-24 | 2016-11-09 | 安徽尚途电力保护设备有限公司 | A kind of high-voltage fence series compensation device |
| CN205829172U (en) * | 2016-06-24 | 2016-12-21 | 安徽徽电科技股份有限公司 | A kind of high-voltage fence adjustable serial compensation device |
| CN206517068U (en) * | 2017-03-10 | 2017-09-22 | 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 |
|---|---|---|---|---|
| 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 |
| CN108206527A (en) * | 2018-02-05 | 2018-06-26 | 安徽徽电科技股份有限公司 | A kind of series compensation system by SCR quick-switchings |
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