CN110474345A - Reduce the supplementary structure and its method of shunt reactor switching overvoltage - Google Patents
Reduce the supplementary structure and its method of shunt reactor switching overvoltage Download PDFInfo
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- CN110474345A CN110474345A CN201910754836.3A CN201910754836A CN110474345A CN 110474345 A CN110474345 A CN 110474345A CN 201910754836 A CN201910754836 A CN 201910754836A CN 110474345 A CN110474345 A CN 110474345A
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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
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt 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
- 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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Abstract
Reduce the supplementary structure of shunt reactor switching overvoltage, it is related to T & D Technology field, including bus M, bus M is connected with three-phase breaker K, three-phase breaker includes A phase, B phase and C phase, A phase, B phase is connected separately with reactor L1 with C phase, reactor L2 and reactor L3, reactor L1 has the end X, reactor L2 has the end Y, reactor L3 has the end Z, the end X, the end Y and the end Z are connected so that reactor L1, reactor L2 and reactor L3 are in parallel, the end X, the end Y and the end Z are connected with switching controlling element, switching controlling element reduces or avoids the phenomenon of restriking of three-phase breaker K.Compared with prior art, the beneficial effects of the present invention are: by the way that switching controlling element is added in route in shunt reactor, the method of the structure and switching of improving shunt reactor avoids the generation of overvoltage, greatly reduces the phenomenon of restriking even being eliminated in vacuum circuit breaker.
Description
Technical field
The present invention relates to T & D Technology field more particularly to a kind of shunt reactor structures.
Background technique
10kV ~ 35kV shunt reactor is mainly used for reactive compensation in the power system, when System Reactive Power changes
It needs to carry out switching to these reactors in time.In recent years, it is had occurred in switching shunt reactor a lot of due to operating electricity
Accident caused by pressing, these accidents gently then cause overvoltage protection to act (such as arrester), serious to cause equipment
It burns, or even explosion.Line side switching overvoltage when aircraft carrier line switching shunt reactor even can cause institute's loss on transmission to be ruined, main transformer
The failures such as terminal short-circuit.The problem of shunt reactor switching overvoltage, seriously threatens the safe operation and power station fortune of electric system
The personal safety of dimension personnel.
Since the characteristic of vacuum circuit breaker can generate when high-voltage shunt reactor uses vacuum circuit breaker as switching tool
Serious overvoltage, and overvoltage main is generated the reason is that the phenomenon of restriking generated during vacuum circuit breaker switching, and
And the higher contact of voltage class is more serious apart from phenomenon of restriking more greatly.Three-phase voltage can not be simultaneously when shunt reactor switching
Zero (since breaker is a mechanical structure, randomness is stronger), and and anti-switching generate overvoltage the main reason for.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provide reduce shunt reactor switching overvoltage supplementary structure and
Method improves the structure and switching of shunt reactor by adding switching controlling element in route in shunt reactor
Method avoids the generation of overvoltage, greatly reduces the phenomenon of restriking even being eliminated in vacuum circuit breaker.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: being reduced shunt reactor and is thrown
The supplementary structure of voltage is cut through, including bus M, the bus M are connected with three-phase breaker K, the three-phase breaker packet
Include A phase, B phase and C phase, the A phase, B phase and C phase are connected separately with reactor L1, reactor L2 and reactor L3, described
Reactor L1 has the end X, and reactor L2 has the end Y, and reactor L3 has the end Z, and the end X, the end Y and the end Z are connected
So that reactor L1, reactor L2 and reactor L3 are in parallel, the end X, the end Y and the end Z are connected with switching regulation member
Part, the switching controlling element reduce or avoid the phenomenon of restriking of the three-phase breaker K.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes that the end X and the Y is arranged in
The thyristor K2 between the end Z and the end Y is arranged in thyristor K1 between end.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes that the end X and the Y is arranged in
The switch element G2 between the end Z and the end Y is arranged in switch element G1 between end.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes that the end X and the reactance is arranged in
Switch element G1 between device L1, the switch element G2 between the end Y and the reactor L2, the end Z and described
Switch element G3 between reactor L3.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes that the end X and the Y is arranged in
Switch element G4 between end is arranged in the switch element G5 between the end Z and the end Y, the end X is arranged in
The thyristor K4 between the end Z and the end Y, institute is arranged in thyristor K3 between the end Y
The switch element G4 and the thyristor K3 stated is in parallel, and the switch element G5 and the thyristor K4 are simultaneously
Connection.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes that the end X and the Y is arranged in
The thyristor K4 between the end Z and the end Y is arranged in thyristor K3 between end, and the end X connects
It is connected to switch element G4, the end Y is connected with switch element G5, and the end Z is connected with switch element G6, the switch
Element G4, the switch element G5 and the switch element G6 are in parallel.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes that the end X and the Y is arranged in
The switch element G8 between the end Z and the end Y is arranged in switch element G7 between end, and the end X is connected with
Transformer T1, the end Y are connected with transformer T2, and the end Z is connected with transformer T3, the transformer T1, described
Transformer T2 and the described transformer T3 it is in parallel, the high pressure of the transformer T1, the transformer T2 and the transformer T3
Part is separately connected the end X, the end Y and the end Z.
In above-mentioned technical proposal, it is preferred that the switching controlling element includes the switch element of the end the X connection
G7, the switch element G8, the switch element G9, the switch element G7 of the end the Z connection of the end Y connection, it described opens
It closes element G8 and the switch element G9 is in parallel, the end X is also connected with transformer T1, and the end Y is also connected with change
Depressor T2, the end Z are also connected with transformer T3, the transformer T1, the transformer T2 and the transformer
T3 is in parallel, and the high-pressure section of the transformer T1, the transformer T2 and the transformer T3 are separately connected the end X, institute
The end Y and the end Z stated.
A method of shunt reactor switching overvoltage is reduced, including the following steps: step A: three-phase breaker K
Before switching, three-phase breaker K open circuit, switch element G4 and switch element G5 are also breaking at this time, thyristor K3 and silicon-controlled
Element K4 is in an off state；Step B: closing three-phase breaker K, immediately thyristor K3 and silicon-controlled member when voltage zero-cross
Part K4 zero cross fired so that between the end X and the end Y, access between the end Y and the end Z；It is closed after access between the end step C:X, the end Y and the end Z
Upper switch element G4 and switch element G5, subsequent thyristor K3 and thyristor K4 exit work.
The method that another kind reduces shunt reactor switching overvoltage, including the following steps: step A: three-phase break
Before device K switching, three-phase breaker K open circuit, switch element G7 and switch element G8 are also breaking at this time, thyristor K3 and controllable
Silicon cell K4 is in an off state, while transformer T1, transformer T2 and transformer T3 are unloaded；Step B: three-phase breaker is closed
Then K allows transformer T1, transformer T2 and transformer T3 switching to enter route；Step C: it then closes a switch and element G7 and opens
Element G8 is closed, transformer T1, transformer T2 and transformer T3 are out of service at this time.
The present invention is when decreasing or even eliminating switching by installing switching controlling element additional to shunt reactor inside to reach
The purpose of overvoltage.It is well known, due to vacuum circuit breaker when high-voltage shunt reactor uses vacuum circuit breaker as switching tool
Characteristic can generate serious overvoltage, and generate overvoltage main the reason is that generating during vacuum circuit breaker switching
It restrikes phenomenon.In order to eliminate overvoltage, phenomenon of restriking is reduced, the application increases switching regulation member to shunt reactor inside
Part, these switching controlling elements can control for paralleling switch, silicon-controlled, switch and SCR control group and switch with transformer
Group etc., the application eliminates or reduces phenomenon of restriking by being arranged by these.Its basic control principle are as follows: in three-phase break
Electric current is reduced during the switching of device as far as possible, to reduce or eliminate the phenomenon of restriking of three-phase breaker.
For paralleling switch is as switching controlling element, cardinal principle is to pass through reactance during switching
Device allows the wave generated when switching to decay as attenuator, reduces electric current so that the probability restriked reduces.For silicon-controlled next
It says, steady more degree is carried out by silicon control zero-cross switching, reduction is shoved, and elimination is restriked.For the combination of silicon-controlled and paralleling switch
For, steady more degree are carried out by silicon control zero-cross switching, reduction is shoved, and elimination is restriked, and then paralleling switch is connected to, can
Control silicon exits route, improves the silicon-controlled service life.For switch is with transformer combination, carried out by transformer switching steady more
Degree, reduction are shoved, and elimination is restriked, and then paralleling switch is connected to, and transformer exits route.
Compared with prior art, the beneficial effects of the present invention are: by the way that switching tune is added in route in shunt reactor
Element is controlled, the method for the structure and switching of improving shunt reactor avoids the generation of overvoltage, greatly reduces or even disappear
In addition to the phenomenon of restriking in vacuum circuit breaker.
Detailed description of the invention
Fig. 1 is 1 schematic diagram of the embodiment of the present invention.
Fig. 2 is 2 schematic diagram of the embodiment of the present invention.
Fig. 3 is 3 schematic diagram of the embodiment of the present invention.
Fig. 4 is 4 schematic diagram of the embodiment of the present invention.
Fig. 5 is 5 schematic diagram of the embodiment of the present invention.
Fig. 6 is 6 schematic diagram of the embodiment of the present invention.
Fig. 7 is 7 schematic diagram of the embodiment of the present invention.
Specific embodiment
Present invention is further described in detail With reference to embodiment.
Embodiment 1, as shown in Figure 1, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, is provided with thyristor K1, is provided between the end Z and the end Y between the end X and the end Y
Thyristor K2.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A: three-phase breaker K switching
Preceding open circuit, and thyristor K1 and thyristor K2 shutdown.Step B: closing three-phase breaker, immediately can when voltage zero-cross
Silicon cell K1 and thyristor K2 zero cross fired are controlled, so that between the end X and the end Y, distinguishing access between the end Y and the end Z.This is implemented
To the more demanding of thyristor K1 and thyristor K2 in example, thyristor K1 and thyristor after access are needed
K2 works long hours.The serviceable bife of thyristor K1 and thyristor K2 are lower in a high voltage state.
Embodiment 2, as shown in Fig. 2, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, is provided with switch element G1, is provided with out between the end Z and the end Y between the end X and the end Y
Close element G2.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A three-phase breaker K switching
Preceding open circuit, switch element G1 and switch element G2 open circuit；Step B: three-phase breaker K switching, not due to reactor circuit at this time
Logical, three-phase breaker K does not have electric current to pass through, therefore three-phase breaker K will not generate phenomenon of restriking.Step C: close a switch member
Part G1 and switch element G2, due to the presence of reactor L1, reactor L2 and reactor L3, switch element G1 and switch element G2
Shoving when switching is decayed by reactor L1, reactor L2 and reactor L3, and overvoltage reduces, and is reduced switch element G1 and is opened
Close the probability restriked of element G2, though in addition switch element G1 and switch element G2 restrike phenomenon damage only switch it is first
Part G1 and switch element G2, it is limited on integrated circuit influence, only need to change switch element G1 and switch element G2.
Embodiment 3, as shown in figure 3, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, the switch element G1 between the end X and the reactor L1, the switch between the end Y and the reactor L2
Element G2, the switch element G3 between the end Z and the reactor L3.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A three-phase breaker K switching
Preceding open circuit, switch element G1, switch element G2 and switch element G3 open circuit；Step B: three-phase breaker K switching, due to electric at this time
Anti- device circuit is obstructed, and three-phase breaker K does not have electric current to pass through, therefore three-phase breaker K will not generate phenomenon of restriking.Step C:
Close a switch element G1, switch element G2 and switch element G3, due to the presence of reactor L1, reactor L2 and reactor L3,
Switch element G1, switch element G2 and shoving when switch element G3 switching are declined by reactor L1, reactor L2 and reactor L3
Subtract, overvoltage reduces, and the probability that switch element G1, switch element G2 and switch element G3 restrike is reduced, even if in addition opening out
Close element G1, switch element G2 and switch element G3 restrike phenomenon damage be switch element G1, switch element G2 and
Switch element G3, it is limited on integrated circuit influence, only need to change switch element G1, switch element G2 and switch element G3.
Embodiment 4, as shown in figure 4, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, is provided with switch element G4, is provided with out between the end Z and the end Y between the end X and the end Y
Close element G5, be additionally provided with thyristor K3 between the end X and the end Y, the end Z and the end Y it
Between be additionally provided with thyristor K4, the switch element G4 and the thyristor K3 are in parallel, the switch member
Part G5 and the thyristor K4 are in parallel.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A: three-phase breaker K switching
Before, three-phase breaker K open circuit, switch element G4 and switch element G5 are also breaking at this time, thyristor K3 and thyristor
K4 is in an off state；Step B: closing three-phase breaker K, immediately thyristor K3 and thyristor K4 when voltage zero-cross
Zero cross fired so that between the end X and the end Y, access between the end Y and the end Z；It is closed out after access between the end step C:X, the end Y and the end Z
It closes element G4 and switch element G5, subsequent thyristor K3 and thyristor K4 exits work.When thyristor zero passage
When loss thyristor zero-voltage switching elements ON, thyristor does not have electric current at this time, and the voltage of thyristor is zero, therefore
Avoid the generation of overvoltage.When switch element G4 and switch element G5 is put into, two polygonal voltages are equal will not to generate overvoltage,
And thyristor can both exit cable after switch element G4 and switch element G5 investment.Thyristor only needs in this scheme
It works when switching, long service life is adjusted accurately, and not only safety avoids the generation of overvoltage, greatly reduces very
Phenomenon of restriking in empty breaker, it is ensured that the service life of thyristor.
Embodiment 5, as shown in figure 5, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, the thyristor K3 between the end X and the end Y, be arranged between the end Z and the end Y can
Silicon cell K4 is controlled, the end X is connected with switch element G4, and the end Y is connected with switch element G5, the end the Z connection
There is switch element G6, the switch element G4, the switch element G5 and the switch element G6 are in parallel.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A: three-phase breaker K switching
Before, three-phase breaker K open circuit, switch element G4, switch element G5 and switch element G6 are also breaking at this time, thyristor K3 and
Thyristor K4 is in an off state；Step B: closing three-phase breaker K, immediately thyristor K3 and can when voltage zero-cross
Control silicon cell K4 zero cross fired so that between the end X and the end Y, access between the end Y and the end Z；Lead between the end step C:X, the end Y and the end Z
Close a switch element G4, switch element G5 and switch element G6 behind road, and subsequent thyristor K3 and thyristor K4 are exited
Work.Work as loss thyristor zero-voltage switching elements ON when thyristor zero passage, thyristor does not have electric current at this time, controllably
The voltage of silicon cell is zero, therefore avoids the generation of overvoltage.Switch element G4, switch element G5 and switch element G6 investment
When, two polygonal voltages are equal will not to generate overvoltage, and controllable after switch element G4, switch element G5 and switch element G6 investment
Silicon cell can both exit cable.Thyristor only needs to work when switching in this scheme, long service life, adjusts essence
Really, not only safety avoids the generation of overvoltage, greatly reduces the phenomenon of restriking in vacuum circuit breaker, it is ensured that controllable
The service life of silicon cell.
Embodiment 6, as shown in fig. 6, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, the controlling element includes the switch element G7 being arranged between the end X and the end Y, and the Z is arranged in
Switch element G8 between end and the end Y, the end X are connected with transformer T1, and the end Y is connected with transformer
T2, the end Z are connected with transformer T3, and the transformer T1, the transformer T2 and the transformer T3 are in parallel,
The high-pressure section of the transformer T1, the transformer T2 and the transformer T3 are separately connected the end X, the end Y
With the end Z.
For high voltage network, manufacture operation voltage levels it is silicon-controlled it is at high cost, technical difficulty is big, therefore this
Apply that voltage device is selected to replace silicon-controlled and realize the purpose for eliminating overvoltage under high voltage environment.Preferably, the present embodiment
In the preferably small impedance voltage device of transformer T1, transformer T2 and transformer T3.The impedance of voltage device is smaller, and effect is better, when
It so in specific implementation also needs that actual requirement is installed and be configured, and common voltage device can also achieve the effect that in the application.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A: three-phase breaker K switching
Before, three-phase breaker K open circuit, switch element G7 and switch element G8 are also breaking at this time, while transformer T1, transformer T2 and change
Depressor T3 is unloaded；Step B: closing three-phase breaker K, and transformer T1, transformer T2 and transformer T3 switching is then allowed to enter line
Road；Step C: then close a switch element G7 and switch element G8, and transformer T1, transformer T2 and transformer T3 exit fortune at this time
Row.
After three-phase breaker K switching, since transformer T1, transformer T2 and transformer T3 are unloaded, the electricity on coil at this time
Stream is the no-load current of transformer T1, transformer T2 and transformer T3, therefore avoids when three-phase breaker K switching without overvoltage
Phenomenon of restriking.It then allows transformer T1, transformer T2 and transformer T3 to carry out operating passing zero by inner control member to change into
Load, switch element G7 and switch element G8 both end voltage are lower after transformer T1, transformer T2 and transformer T3 are loaded successfully,
Therefore the element G7 and switch element G8 that closes a switch at this time will not restrike, transformation after switch element G7 and switch element G8 switching
Device T1, transformer T2 and transformer T3 were both out of service.For different grades of voltage, transformer T1, transformer T2 and transformation
Inside device T3 and different load switching elements, such as silicon-controlled, low tension switch are used, these can be selected according to the actual situation
It selects and configures.Simultaneously it is exactly transformer T1, transformer T2 and transformer T3 load failure, then the only transformer T1 damaged, becomes
Depressor T2 and transformer T3, it is limited to entire line influence, it can be down to progress transformer T1, transformer T2 and transformer T3 more
It changes.
Embodiment 7, as shown in fig. 7, the supplementary structure of shunt reactor switching overvoltage, including bus M are reduced, it is described
Bus M is connected with three-phase breaker K, and the three-phase breaker K includes A phase, B phase and C phase, the A phase, B phase and C phase point
Not being connected with reactor L1, reactor L2 and reactor L3, the reactor L1 has the end X, and reactor L2 has the end Y, electricity
Anti- device L3 have the end Z, the end X, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 simultaneously
Connection, the switching controlling element include the switch element G7 of the end the X connection, the switch element G8 of the end the Y connection, institute
State the switch element G9, the switch element G7, the switch element G8 and the switch element G9 of the connection of the end Z simultaneously
Connection, the end X are also connected with transformer T1, and the end Y is also connected with transformer T2, and the end Z is also connected with transformation
Device T3, the transformer T1, the transformer T2 and the transformer T3 are in parallel, the transformer T1, the transformation
The high-pressure section of device T2 and the transformer T3 are separately connected the end X, the end Y and the end Z.
For high voltage network, manufacture operation voltage levels it is silicon-controlled it is at high cost, technical difficulty is big, therefore this
Apply that voltage device is selected to replace silicon-controlled and realize the purpose for eliminating overvoltage under high voltage environment.Preferably, the present embodiment
In the preferably small impedance voltage device of transformer T1, transformer T2 and transformer T3.The impedance of voltage device is smaller, and effect is better, when
It so in specific implementation also needs that actual requirement is installed and be configured, and common voltage device can also achieve the effect that in the application.
The method for reducing shunt reactor switching overvoltage, including the following steps: step A: three-phase breaker K switching
Before, three-phase breaker K open circuit, switch element G7, switch element G8 and switch element G9 are also breaking at this time, while transformer T1,
Transformer T2 and transformer T3 are unloaded；Step B: closing three-phase breaker K, then allows transformer T1, transformer T2 and transformer
T3 switching enters route；Step C: then closing a switch element G7, switch element G8 and switch element G9, at this time transformer T1,
Transformer T2 and transformer T3 are out of service.
After three-phase breaker K switching, since transformer T1, transformer T2 and transformer T3 are unloaded, the electricity on coil at this time
Stream is the no-load current of transformer T1, transformer T2 and transformer T3, therefore avoids when three-phase breaker K switching without overvoltage
Phenomenon of restriking.It then allows transformer T1, transformer T2 and transformer T3 to carry out operating passing zero by inner control member to change into
Load, switch element G7, switch element G8 and switch element G9 two after transformer T1, transformer T2 and transformer T3 are loaded successfully
Hold voltage lower, therefore the element G7 that closes a switch at this time, switch element G8 and switch element G9 will not restrike, and work as switch element
Transformer T1, transformer T2 and transformer T3 were both out of service after G7, switch element G8 and switch element G9 switching.For difference
The voltage of grade, transformer T1, transformer T2 and the inside transformer T3 and the different load switching element of use, such as silicon-controlled,
Low tension switch etc., these can be selected and be configured according to the actual situation.It is exactly simultaneously transformer T1, transformer T2 and transformer
T3 load failure, then only transformer T1, transformer T2 and the transformer T3 damaged is limited to entire line influence, can be down to
Carry out the replacement of transformer T1, transformer T2 and transformer T3.
Claims (10)
1. reducing the supplementary structure of shunt reactor switching overvoltage, including bus M, the bus M are connected with three-phase break
Device K, the three-phase breaker include A phase, B phase and C phase, and the A phase, B phase are connected separately with reactor L1, electricity with C phase
Anti- device L2 and reactor L3, the reactor L1 have the end X, and reactor L2 has the end Y, and reactor L3 has the end Z, the X
End, the end Y and the end Z is connected so that reactor L1, reactor L2 and reactor L3 are in parallel, it is characterized in that, the end X,
The end Y and the end Z are connected with switching controlling element, and the switching controlling element reduces or avoid the three-phase break
The phenomenon of restriking of device K.
2. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
Cutting controlling element includes the thyristor K1 being arranged between the end X and the end Y, be arranged in the end Z and
Thyristor K2 between the end Y.
3. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
Cutting controlling element includes the switch element G1 being arranged between the end X and the end Y, and the end Z and institute is arranged in
The switch element G2 between the end Y stated.
4. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
Cutting controlling element includes the switch element G1 being arranged between the end X and the reactor L1, the end Y and the electricity
Switch element G2 between anti-device L2, the switch element G3 between the end Z and the reactor L3.
5. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
Cutting controlling element includes the switch element G4 being arranged between the end X and the end Y, and the end Z and institute is arranged in
The thyristor K3 between the end X and the end Y is arranged in the switch element G5 between the end Y stated, is arranged in institute
Thyristor K4, the switch element G4 and the thyristor K3 between the end Z and the end Y stated are simultaneously
Connection, the switch element G5 and the thyristor K4 are in parallel.
6. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
Cutting controlling element includes the thyristor K3 being arranged between the end X and the end Y, be arranged in the end Z and
Thyristor K4 between the end Y, the end X are connected with switch element G4, and the end Y is connected with switch element
G5, the end Z are connected with switch element G6, the switch element G4, the switch element G5 and switch member
Part G6 is in parallel.
7. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
Cutting controlling element includes the switch element G7 being arranged between the end X and the end Y, and the end Z and institute is arranged in
Switch element G8 between the end Y stated, the end X are connected with transformer T1, and the end Y is connected with transformer T2, described
The end Z be connected with transformer T3, the transformer T1, the transformer T2 and the transformer T3 are in parallel, the change
The high-pressure section of depressor T1, the transformer T2 and the transformer T3 are separately connected the end X, the end Y and described
The end Z.
8. the supplementary structure according to claim 1 for reducing shunt reactor switching overvoltage, it is characterized in that, the throwing
The switch element G7 that controlling element includes the end the X connection, the switch element G8 of the end the Y connection are cut, the end the Z connection
Switch element G9, the switch element G7, the switch element G8 and the switch element G9 parallel connection, the end X
It is also connected with transformer T1, the end Y is also connected with transformer T2, and the end Z is also connected with transformer T3, the change
Depressor T1, the transformer T2 and the transformer T3 are in parallel, the transformer T1, the transformer T2 and the transformation
The high-pressure section of device T3 is separately connected the end X, the end Y and the end Z.
9. the method according to claim 5 for reducing shunt reactor switching overvoltage, it is characterized in that including following
Step:
Step A: before three-phase breaker K switching, three-phase breaker K open circuit, switch element G4 and switch element G5 are also breaking at this time,
Thyristor K3 and thyristor K4 are in an off state；
Step B: closing three-phase breaker K, and thyristor K3 and thyristor K4 zero cross fired when voltage zero-cross, make immediately
Between the end X and the end Y, access between the end Y and the end Z；
Close a switch after access between the end step C:X, the end Y and the end Z element G4 and switch element G5, subsequent thyristor K3 and
Thyristor K4 exits work.
10. the method according to claim 7 for reducing shunt reactor switching overvoltage, it is characterized in that including following
Step:
Step A: before three-phase breaker K switching, three-phase breaker K open circuit, switch element G7 and switch element G8 are also breaking at this time,
Thyristor K3 and thyristor K4 are in an off state, while transformer T1, transformer T2 and transformer T3 are unloaded；
Step B: closing three-phase breaker K, and transformer T1, transformer T2 and transformer T3 switching is then allowed to enter route；
Step C: then close a switch element G7 and switch element G8, and transformer T1, transformer T2 and transformer T3 are exited at this time
Operation.
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