CN107465196A - A kind of breaking circuit for voltage compensating device - Google Patents
A kind of breaking circuit for voltage compensating device Download PDFInfo
- Publication number
- CN107465196A CN107465196A CN201710806530.9A CN201710806530A CN107465196A CN 107465196 A CN107465196 A CN 107465196A CN 201710806530 A CN201710806530 A CN 201710806530A CN 107465196 A CN107465196 A CN 107465196A
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- igct
- bridge
- power supply
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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
- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
-
- 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
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention provides a kind of breaking circuit for voltage compensating device, and the circuit includes：Single-phase transformer T, single-phase rectification bridge RE, the first DC support electric capacity C1, the second DC support electric capacity C2, the first IGCT SCR21, the second IGCT SCR22；Single-phase transformer T primary side is connected with system power supply, and for the alternating current of reception system power supply output, secondary is connected with single-phase rectification bridge RE AC；First DC support electric capacity C1 and the second DC support electric capacity C2 are connected in series composition tie point, first IGCT SCR21 and the second IGCT SCR22 series aiding connections connect and compose the second branch road, tie point and single-phase rectification bridge RE DC side and the second branch circuit parallel connection；The midpoint of second branch road is connected with bidirectional thyristor SCR1 one end, and the bidirectional thyristor SCR1 other end and the midpoint of the output end of system power supply and tie point connect.The present invention can be reliably by the shut-off of the IGCT in voltage compensating device.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of breaking circuit for voltage compensating device.
Background technology
The main method for solving voltage dip at present is in user side protection device for installing, such as uninterrupted power source (UPS), is moved
State voltage restorer (DVR) and dynamic sag correction device (DYSC).UPS may be used also due to can not only solve Problem of Voltage Temporary-Drop
It is used widely with solving voltage long-time disruption, but with the popularization of the main power supply mode in China double loop, electricity
Net voltage long-time disruption almost no longer occurs, and simultaneously because UPS losses are big, cost is high and battery service works
Measure the problems such as big and be that many enterprises cause the problem of new.Although DVR is obtained extensively as the mainstream scheme for administering voltage dip
Using, but because its operation principle is overlapped in series scheme, therefore can not be worked when power network reclosing causes system open circuit.
Although DYSC solves subject matter existing for DVR, but due to causing expensive not pushing away using single-phase full bridge topological structure
Extensively.
Therefore developing low-cost, the low-loss and voltage dip controlling device for possessing the ability of rapidly switching off has important meaning
Justice, and the key technology rapidly switched off is then IGCT breaking circuit.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of breaking circuit for voltage compensating device, can be reliable
Realize the shut-off of the IGCT in voltage compensating device in ground.
A kind of breaking circuit for voltage compensating device provided by the invention, including：Single-phase transformer T, single-phase rectifier
Bridge RE, the first DC support electric capacity C1, the second DC support electric capacity C2, the first IGCT SCR21, the second IGCT SCR22；
The single-phase transformer T, its primary side are connected with system power supply, for receiving the exchange of the system power supply output
Electricity, secondary are connected with the AC of the single-phase rectification bridge RE；
The first DC support electric capacity C1 and the second DC support electric capacity C2 are connected in series composition tie point, institute
State the first IGCT SCR21 and the second IGCT SCR22 series aiding connections connect and compose the second branch road, the tie point with
The DC side of the single-phase rectification bridge RE and second branch circuit parallel connection；
The midpoint of second branch road is connected with bidirectional thyristor SCR1 one end, and the bidirectional thyristor SCR1's is another
End is connected with the output end of the system power supply and the midpoint of the tie point.
Preferably, the system power supply is the three-phase system power supply of output three-phase alternating current.
Preferably, in addition to thyristor control circuit；
The thyristor control circuit, with the first IGCT SCR21, the second IGCT SCR22, described two-way
IGCT SCR1 connections, for exporting electric signal to the first IGCT SCR21, the second IGCT SCR22, described double
To IGCT SCR1, to control the first IGCT SCR21, the second IGCT SCR22, the bidirectional thyristor SCR1
Conducting.
Preferably, the single-phase rectification bridge RE includes two bridge arms in parallel, and each bridge arm is connected in series including two
Diode, and both ends of the midpoint of two bridge arms respectively with the secondary of the single-phase transformer T are connected.
Preferably, AC of the midpoint of second branch road also with load and three-phase bridge inverter is connected；
The three-phase bridge inverter, its AC are connected by the bidirectional thyristor SCR1 with the system power supply, directly
Stream side is connected with energy-storage travelling wave tube, for by the bidirectional thyristor SCR1, receiving the alternating current from the system power supply, and
Alternating current progress rectification is obtained into direct current, and direct current is delivered to the energy-storage travelling wave tube, is additionally operable to receive direct current, and will
Direct current carries out inversion and obtains alternating current, and by the exchange electricity output that inversion obtains to the load；
The energy-storage travelling wave tube, charged for receiving direct current, be additionally operable to export direct current to the three-phase bridge inversion
Device.
Preferably, the three-phase bridge inverter includes current source mode and voltage source mode, and the three-phase bridge inverter
When being operated in current source mode, it receives the alternating current from the system power supply, and the three-phase bridge inverter is operated in voltage
During source module, it controls the energy-storage units output direct current.
Preferably, the three-phase bridge inverter is three phase full bridge topological structure or three-phase half-bridge topology.
Preferably, in addition to current-limiting resistance R, current-limiting reactor L；
The one end and institute of the midpoint of second branch road by the current-limiting reactor L and bidirectional thyristor SCR1
State the AC connection of three-phase bridge inverter；
One end of the tie point is connected by one end of the current-limiting resistance R and the DC side of the single-phase rectification bridge RE
Connect.
Preferably, the single-phase transformer T is step-up transformer.
Preferably, the boosting coefficient range of the single-phase transformer is 1:3~1:5.
Implement the present invention, have the advantages that：, can be with triggering and conducting first when voltage dip occurs in system power supply
IGCT SCR21, the first DC support electric capacity C1 voltage are applied to bidirectional thyristor SCR1 as back-pressure, control two-way brilliant lock
Pipe SCR1 upper tube SCR11 shut-offs, can be with the second IGCT of triggering and conducting SCR22, the second DC support electric capacity C2 voltage
Bidirectional thyristor SCR1 is applied to as back-pressure, control bidirectional thyristor SCR1 down tube SCR12 shut-offs, adds two-way brilliant lock
The reliability of pipe SCR1 shut-offs.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram provided by the present invention for the breaking circuit of voltage compensating device.
Fig. 2 is the afterflow passage provided by the invention for denoting bidirectional thyristor SCR1 in the circuit diagram shown in figure 1
Schematic diagram.
Embodiment
The present invention provides a kind of breaking circuit for voltage compensating device, as shown in figure 1, the breaking circuit includes：It is single
Phase transformer T, single-phase rectification bridge RE, the first DC support electric capacity C1, the second DC support electric capacity C2, the first IGCT SCR21,
Second IGCT SCR22.Wherein, the first IGCT SCR21 and the second IGCT SCR22 can be unidirectional thyristor.
Single-phase transformer T primary side is connected with system power supply, for the alternating current of reception system power supply output, single-phase transformation
Device T secondary is connected with single-phase rectification bridge RE AC.
First DC support electric capacity C1 and the second DC support electric capacity C2 are connected in series composition tie point, the first IGCT
SCR21 and the second IGCT SCR22 series aiding connections connect and compose the second branch road, tie point and single-phase rectification bridge RE DC side
And second branch circuit parallel connection.
The midpoint of second branch road is connected with bidirectional thyristor SCR1 one end, bidirectional thyristor the SCR1 other end and system
The midpoint connection of the output end and tie point of power supply.
Wherein, connection of the midpoint of tie point between the first DC support electric capacity C1 and the second DC support electric capacity C2
Point, the tie point of the midpoint of the second branch road between the first IGCT SCR21 and the second IGCT SCR22.
Further, system power supply is the three-phase system power supply of output three-phase alternating current.
Further, the breaking circuit for voltage compensating device also includes thyristor control circuit (not shown).
Thyristor control circuit is connected with the first IGCT SCR21, the second IGCT SCR22, bidirectional thyristor SCR1, is used
In output electric signal to the first IGCT SCR21, the second IGCT SCR22, bidirectional thyristor SCR1, to control the first IGCT
SCR21, the second IGCT SCR22, bidirectional thyristor SCR1 conductings.
Further, single-phase rectification bridge RE includes two bridge arms in parallel, what each bridge arm was connected in series including two
Diode, and both ends of the midpoint of two bridge arms respectively with single-phase transformer T secondary are connected.
Further, AC of the midpoint of the second branch road also with load and three-phase bridge inverter is connected.
The AC of three-phase bridge inverter is connected by bidirectional thyristor SCR1 with system power supply, DC side and energy-storage travelling wave tube
Connection, for by bidirectional thyristor SCR1, receiving the alternating current from system power supply, and alternating current progress rectification is obtained directly
Stream electricity, and direct current is delivered to energy-storage travelling wave tube, it is additionally operable to receive direct current, and direct current progress inversion is obtained into alternating current,
And by the exchange electricity output that inversion obtains to load.Here, load can be the power equipment for consuming electric energy.
Energy-storage travelling wave tube is charged for receiving direct current, is additionally operable to export direct current to three-phase bridge inverter.
Further, three-phase bridge inverter includes current source mode and voltage source mode, and three-phase bridge inverter is operated in
During current source mode, it receives the alternating current from system power supply, and when three-phase bridge inverter is operated in voltage source mode, it is controlled
Energy-storage units export direct current.
Further, three-phase bridge inverter is three phase full bridge topological structure or three-phase half-bridge topology.
Further, the breaking circuit for voltage compensating device also includes current-limiting resistance R, current-limiting reactor L.
The midpoint of second branch road passes through current-limiting reactor L and bidirectional thyristor SCR1 one end and three-phase bridge inverter
AC connects, wherein, current-limiting reactor L one end is connected with the midpoint of the second branch road, and the other end is connected to bidirectional thyristor
Between the AC of SCR1 and three-phase bridge inverter.One end of tie point is straight by current-limiting resistance R and single-phase rectification bridge RE's
Flow one end connection of side.
Further, single-phase transformer T is step-up transformer.
Further, the boosting coefficient range of single-phase transformer is 1:3~1:5.Here boosting coefficient refers to single-phase change
The ratio of depressor original edge voltage and secondary voltage.
Bidirectional thyristor SCR1 can be equivalent to two unidirectional thyristor reverse parallel connections, and one of unidirectional thyristor is upper
Pipe SCR11, another unidirectional thyristor are down tube SCR12.When system power supply normal work, bidirectional thyristor SCR1 upper tube
SCR11 and down tube SCR12 is triggered conducting, and the first IGCT SCR21 and the second IGCT SCR22 are not triggered and led
Logical, three-phase bridge inverter is operated in current source mode.
First DC support electric capacity C1 and the second DC support electric capacity C2 are filled by single-phase transformer T and single-phase rectification bridge RE
Electricity.Once system power supply occur voltage dip, and if bidirectional thyristor SCR1 upper tube SCR11 it is in the conduction state when, simultaneously
The first IGCT SCR21 in breaking circuit (that is to say IGCT back-pressure breaking circuit) is turned on, to turn off bidirectional thyristor
SCR1 upper tube SCR11, afterwards three-phase bridge inverter switch to voltage source mode for load power.If breaking circuit needs to close
Disconnected bidirectional thyristor SCR1 in the conduction state upper tube SCR11, then the first brilliant lock in triggering and conducting back-pressure breaking circuit
Pipe SCR21, now the first DC support electric capacity C1 voltage upper tube SCR11, therefore upper tube SCR11 meetings can be applied to as back-pressure
It is turned off within 0.2ms.If breaking circuit needs to turn off bidirectional thyristor SCR1 in the conduction state down tube
SCR12, then the second IGCT SCR22 in triggering and conducting breaking circuit, now the second DC support electric capacity C2 voltage can make
Down tube SCR12 is applied to for back-pressure, therefore down tube SCR12 can be turned off within 0.2ms.
In order to give bidirectional thyristor SCR1 provide afterflow passage, the first DC support electric capacity C1, the first IGCT SCR21 and
Current-limiting reactor L constitutes new current loop as afterflow passage, as shown in dashed line in figure 2, due to the first DC support
Electric capacity C1 voltages are higher than the voltage of system power supply, after the first IGCT SCR21 is triggered conducting, flow through bidirectional thyristor SCR1
Upper tube SCR11 electric current can be transferred to new current loop, as long as ensureing that the first DC support electric capacity C1 velocities of discharge need
The turn-off time for being greater than bidirectional thyristor SCR1 upper tube SCR11 requires 0.2ms, can realize upper tube SCR11 reliable pass
It is disconnected；Similarly, as long as ensureing that the second DC support electric capacity C2 velocities of discharge need the down tube SCR12's more than bidirectional thyristor SCR1
Turn-off time requires 0.2ms, can realize down tube SCR12 reliable turn-off.
In summary, provided by the present invention for the breaking circuit of voltage compensating device, it is temporary to there is voltage in system power supply
During drop, the first IGCT SCR21, the second IGCT SCR22, the first DC support electric capacity C1, the second DC support can be passed through
Electric capacity C2, to control bidirectional thyristor SCR1 shut-off, add the reliability of bidirectional thyristor SCR1 shut-offs.
By application IGCT technology, LC harmonic technologies and inverter afterflow Path Setup technology, it is fast to realize IGCT
Speed shut-off, and the reliability of IGCT shut-off is added, also achieve the compensation of three-phase bridge contravarianter voltage and the nothing of system power supply
Stitch handoff functionality, it can be ensured that the normal work of voltage-sensitive load, the circuit loss is low, and cost is low, extends voltage dip
Treatment process field, and there is the response speed being exceedingly fast, standby efficiency high, working stability, and also it is simple in construction, effectively save
About product cost, is easy to safeguard, easily operated, cost performance is higher.
IGCT provided by the invention, which rapidly switches off circuit, can realize the inverter parallel scheme of voltage compensating device, inverse
Change device parallel technology can be used not only for voltage compensation and can be also used for the power quality controllings such as reactive-load compensation and active power filtering.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
- A kind of 1. breaking circuit for voltage compensating device, it is characterised in that including：Single-phase transformer T, single-phase rectification bridge RE, the first DC support electric capacity C1, the second DC support electric capacity C2, the first IGCT SCR21, the second IGCT SCR22；The single-phase transformer T, its primary side are connected with system power supply, secondary for receiving the alternating current of the system power supply output Side is connected with the AC of the single-phase rectification bridge RE；The first DC support electric capacity C1 and the second DC support electric capacity C2 is connected in series composition tie point, and described One IGCT SCR21 and the second IGCT SCR22 series aiding connections connect and compose the second branch road, the tie point with it is described Single-phase rectification bridge RE DC side and second branch circuit parallel connection；The midpoint of second branch road is connected with bidirectional thyristor SCR1 one end, the other end of the bidirectional thyristor SCR1 with The midpoint of the output end of the system power supply and the tie point connects.
- 2. the breaking circuit according to claim 1 for voltage compensating device, it is characterised in that the system power supply is Export the three-phase system power supply of three-phase alternating current.
- 3. the breaking circuit according to claim 1 for voltage compensating device, it is characterised in that also including IGCT control Circuit processed；The thyristor control circuit, with the first IGCT SCR21, the second IGCT SCR22, the two-way brilliant lock Pipe SCR1 connections, for exporting electric signal to the first IGCT SCR21, the second IGCT SCR22, the two-way crystalline substance Brake tube SCR1, to control the first IGCT SCR21, the second IGCT SCR22, the bidirectional thyristor SCR1 to lead It is logical.
- 4. the breaking circuit according to claim 1 for voltage compensating device, it is characterised in that the single-phase rectification bridge RE includes two bridge arms in parallel, and each bridge arm includes two diodes being connected in series, and the midpoint difference of two bridge arms It is connected with the both ends of the secondary of the single-phase transformer T.
- 5. the breaking circuit according to claim 2 for voltage compensating device, it is characterised in that second branch road AC of the midpoint also with load and three-phase bridge inverter is connected；The three-phase bridge inverter, its AC are connected by the bidirectional thyristor SCR1 with the system power supply, DC side It is connected with energy-storage travelling wave tube, for by the bidirectional thyristor SCR1, receiving the alternating current from the system power supply, and will hand over Stream electricity carries out rectification and obtains direct current, and direct current is delivered into the energy-storage travelling wave tube, is additionally operable to receive direct current, and by direct current Electricity carries out inversion and obtains alternating current, and by the exchange electricity output that inversion obtains to the load；The energy-storage travelling wave tube, charged for receiving direct current, be additionally operable to export direct current to the three-phase bridge inverter.
- 6. the breaking circuit according to claim 5 for voltage compensating device, it is characterised in that the three-phase bridge inversion Device includes current source mode and voltage source mode, and when the three-phase bridge inverter is operated in current source mode, its reception comes from The alternating current of the system power supply, when the three-phase bridge inverter is operated in voltage source mode, it controls the energy-storage units defeated Go out direct current.
- 7. the breaking circuit according to claim 5 for voltage compensating device, it is characterised in that the three-phase bridge inversion Device is three phase full bridge topological structure or three-phase half-bridge topology.
- 8. the breaking circuit according to claim 5 for voltage compensating device, it is characterised in that also including current-limiting resistance R, current-limiting reactor L；One end and described three that the midpoint of second branch road passes through the current-limiting reactor L and bidirectional thyristor SCR1 The AC connection of phase bridge inverter；One end of the tie point is connected by the current-limiting resistance R with one end of the DC side of the single-phase rectification bridge RE.
- 9. the breaking circuit according to claim 1 for voltage compensating device, it is characterised in that the single-phase transformer T is step-up transformer.
- 10. the breaking circuit according to claim 9 for voltage compensating device, it is characterised in that the single-phase transformation The boosting coefficient range of device is 1:3~1:5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806530.9A CN107465196A (en) | 2017-09-08 | 2017-09-08 | A kind of breaking circuit for voltage compensating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710806530.9A CN107465196A (en) | 2017-09-08 | 2017-09-08 | A kind of breaking circuit for voltage compensating device |
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| CN107465196A true CN107465196A (en) | 2017-12-12 |
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| CN201710806530.9A Pending CN107465196A (en) | 2017-09-08 | 2017-09-08 | A kind of breaking circuit for voltage compensating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108173270A (en) * | 2017-12-16 | 2018-06-15 | 西安翌飞核能装备股份有限公司 | A kind of energy saving power distribution network low-voltage compensating device and method |
| CN109193559A (en) * | 2018-10-30 | 2019-01-11 | 广州供电局有限公司 | Power supply fast switching system, method for handover control and device |
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| CN207320835U (en) * | 2017-09-08 | 2018-05-04 | 深圳供电局有限公司 | A kind of breaking circuit for voltage compensating device |
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| JP2002262460A (en) * | 2001-03-05 | 2002-09-13 | Meidensha Corp | Power supply facility for residence |
| JP2009011111A (en) * | 2007-06-29 | 2009-01-15 | Nichicon Corp | Instantaneous voltage drop compensation device |
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| CN109193559A (en) * | 2018-10-30 | 2019-01-11 | 广州供电局有限公司 | Power supply fast switching system, method for handover control and device |
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