CN108832609B - A method of singlephase earth fault is solved based on turn-adjusting arc-extinguishing winding - Google Patents
A method of singlephase earth fault is solved based on turn-adjusting arc-extinguishing winding Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
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Abstract
This application involves Single-phase Earth Fault of Power System protection technique field more particularly to a kind of methods for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding.The described method includes: turn-adjusting arc-extinguishing winding exports inductance current if singlephase earth fault non-transient failure, the capacity current of electric system is compensated；Meanwhile starting the work of reversed polarity winding, so that turn-adjusting arc-extinguishing winding is entered overcompensation state；According to the demand of electric system, the number of turns of the reversed polarity winding of investment is set；Singlephase earth fault is carried out to sentence phase and route selection；Reversed polarity winding is set to be in bypass condition, turn-adjusting arc-extinguishing winding works on, and handles singlephase earth fault；After the completion of singlephase earth fault processing, turn-adjusting arc-extinguishing winding enters to operating status, and power system recovery runs well.Method provided by the present application, the inductance current that turn-adjusting arc-extinguishing winding can be made to generate disturb, and be grounded failure sentences phase route selection function.
Description
Technical field
This application involves Single-phase Earth Fault of Power System protection technique fields, more particularly to one kind to be based on turn-adjusting extinguishing arc
The method of coil solution singlephase earth fault.
Background technique
Arc suppression coil is connected between neutral point of electric network and earth mat, when singlephase earth fault occurs for electric system, failure
Point flows through capacity current, and arc suppression coil provides inductance current and compensates, and so that current in the fault point is down to 10A hereinafter, being conducive to prevent
It only restrikes after arc light zero passage, achievees the purpose that arc extinguishing, reduce the probability that amplitude overvoltage occurs, prevent accident from further expanding
Greatly, the reliability of Operation of Electric Systems is improved.
With the extensive use of power cable, capacity current is dramatically increased over the ground for distribution, arc suppression coil compensation mode residual flow
It controls difficulty to increase, route selection is inaccurate to be also not easily overcome.In this regard, to propose arc suppression coil parallel connection small for national grid, south electric network
The neutral flexible grounding mode of resistance operates normally and occurs to put into arc suppression coil when transient earthing failure, permanent earth event occurs
Small resistance is put into when barrier, and quickly isolating for faulty line is realized by relay protection sensitivity.
But this mode of arc suppression coil parallel low resistance, there is also some problems, such as when putting into small resistance, small
The active power of resistance is excessive, can only short-term operation, Yi Fasheng low resistance grounding overheat even the problem of burning.
Summary of the invention
This application provides a kind of methods for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, to solve arc blowout wire
Enclose the inductance current that generates can not overcompensation electric system capacity current, accurately ground fault can not sentence mutually and route selection
The problem of.
A method of singlephase earth fault is solved based on turn-adjusting arc-extinguishing winding, which comprises
If the P1 singlephase earth fault non-transient failure, the turn-adjusting arc-extinguishing winding exports inductance current, compensation
The capacity current of electric system；Meanwhile starting the work of reversed polarity winding, so that the turn-adjusting arc-extinguishing winding is entered overcompensation shape
State；
The number of turns of the reversed polarity winding of investment is arranged according to the demand of the electric system in P2；
P3 carries out the singlephase earth fault to sentence phase and route selection；
P4 makes the reversed polarity winding be in bypass condition, and the turn-adjusting arc-extinguishing winding works on, and handles the list
Phase ground fault；
After the completion of the processing of singlephase earth fault described in P5, the turn-adjusting arc-extinguishing winding enters to operating status, the electricity
Force system restores to run well.
Optionally, before the P1, further includes:
S1 acquires the voltage and current signals of the electric system；
S2 judges the operating status of the electric system according to the voltage and current signals, identifies the electric system
Whether singlephase earth fault is occurred；
If singlephase earth fault occurs for S3 electric system, the turn-adjusting arc-extinguishing winding work judges the single-phase earthing
Whether failure is transient fault.
Optionally, after the S3, further includes:
If the Q1 singlephase earth fault is the transient fault, the reversed polarity winding is in bypass condition；
Turn-adjusting arc-extinguishing winding described in Q2 exports inductance current, compensates the capacity current of the electric system；
Transient fault described in Q3 disappears, then the turn-adjusting arc-extinguishing winding enters to operating status, the electric system
Restore to run well.
Optionally, the number of turns of the reversed polarity winding of investment is arranged in the demand according to the electric system, packet
It includes:
If only needing the inductance current of the turn-adjusting arc-extinguishing winding output to generate disturbance, with this to the single-phase earthing
Failure sentence mutually and route selection, then the number of turns of the reversed polarity winding put into are the first preset quantity；
If desired realize that the protective device starting tripping to the turn-adjusting arc-extinguishing winding, isolated fault route are then put into
The reversed polarity winding the number of turns be the second preset quantity；
Wherein, first preset quantity is less than second preset quantity.
Optionally, the number of turns of the reversed polarity winding is the 10%-50% of the number of turns of the turn-adjusting arc-extinguishing winding.
Optionally, the number of turns of the turn-adjusting arc-extinguishing winding investment, generates when running well according to the electric system
The current signal determines.
Optionally, the reversed polarity winding is serially connected between two parts same polarity winding of the turn-adjusting arc-extinguishing winding,
Also, the reversed polarity winding is opposite with the direction of winding of the turn-adjusting arc-extinguishing winding.
The technical scheme provided by the application includes following advantageous effects:
A kind of method solving singlephase earth fault based on turn-adjusting arc-extinguishing winding provided by the present application, sends out in electric system
Raw singlephase earth fault, and when non-transient failure, not only puts into turn-adjusting arc-extinguishing winding, meanwhile, also put into reversed polarity around
Group；The capacity current for the inductance current compensation electric system that turn-adjusting arc-extinguishing winding generates, reversed polarity winding are serially connected with turn-adjusting
Between two parts same polarity winding of arc suppression coil, also, the direction of winding of reversed polarity winding and turn-adjusting arc-extinguishing winding on the contrary,
Therefore, the investment of reversed polarity winding can reduce the magnetic flux of original turn-adjusting arc-extinguishing winding, increase the inductance current of its generation,
Turn-adjusting arc-extinguishing winding is set to enter overcompensation state；During this period, the reversed polarity of investment can be set according to the demand of electric system
The number of turns of winding adjusts the degree of arc suppression coil overcompensation.Arc suppression coil reaches overcompensation state, the inductance current hair generated
Raw perturbation mutation, can be realized and sentence phase and route selection to singlephase earth fault；It has been determined that singlephase earth fault occurs in electric power
Which phase of system after which route, makes reversed polarity winding be in bypass condition, arc suppression coil, which works on, compensates capacitive
Electric current, this phase process singlephase earth fault.After the completion of singlephase earth fault processing, power system recovery runs well, due to
The investment of the self-starting resistance box of turn-adjusting arc-extinguishing winding after ground connection extinguishing arc, turn-adjusting arc-extinguishing winding can automatically exit from compensation operation
State, into operating status.Method provided by the present application improves the structure and function of arc suppression coil, in addition to can be achieved to disappear
Arc coil the number of turns is adjustable, except inductance is adjustable, also adds arc suppression coil inductance current functional mutant.By sealing in antipole
Property winding, change turn-adjusting arc-extinguishing winding iron core in magnetic flux.To make arc suppression coil inductance current that perturbation mutation occur,
Realize singlephase earth fault sentences phase route selection function.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the method flow diagram of singlephase earth fault non-transient failure provided by the embodiments of the present application.
Fig. 2 is the process of the method provided by the embodiments of the present application that singlephase earth fault is solved based on turn-adjusting arc-extinguishing winding
Figure.
Fig. 3 is the structural schematic diagram of the turn-adjusting arc-extinguishing winding provided by the embodiments of the present application for being serially connected with reversed polarity winding.
Specific embodiment
Attached drawing 1 is please referred to, which is the method stream of singlephase earth fault non-transient failure provided by the embodiments of the present application
Cheng Tu.
A kind of method that singlephase earth fault is solved based on turn-adjusting arc-extinguishing winding provided by the present application, the method packet
It includes:
If the P1 singlephase earth fault non-transient failure, the turn-adjusting arc-extinguishing winding exports inductance current, compensation
The capacity current of electric system；Meanwhile starting the work of reversed polarity winding, so that the turn-adjusting arc-extinguishing winding is entered overcompensation shape
State.
Singlephase earth fault is divided into instantaneity ground fault and non-transient failure, when failure is non-transient failure,
Since turn-adjusting arc-extinguishing winding is limited by switch and gear, the inductance current for relying solely on its own generation is difficult to realize to electricity
The overcompensation of Force system capacity current.
Therefore, the embodiment of the present application is also provided with reversed polarity winding on the basis of turn-adjusting arc-extinguishing winding.Reversed polarity around
The direction of winding of group and turn-adjusting arc-extinguishing winding starts reversed polarity winding on the contrary, when non-transient failure occurs, and generates
The inductance current Phase synchronization of inductance current and turn-adjusting arc-extinguishing winding, but the winding mode reversed each other due to the two, antipole
Property winding addition can reduce the inductance of turn-adjusting arc-extinguishing winding, then, the inductance current that turn-adjusting arc-extinguishing winding generates is just
It will increase.The inductance current of increase can not only compensate the capacity current of electric system, can also turn-adjusting arc-extinguishing winding be made to enter
Overcompensation state.
The number of turns of the reversed polarity winding of investment is arranged according to the demand of the electric system in P2.
The reversed polarity winding of different the number of turns can be put into according to the different demands of electric system.Such as, it is only necessary to small overfill
The amount of repaying makes turn-adjusting arc-extinguishing winding generate tens amperes of mutation compensation electric current, is mutually selected with realizing sentencing for singlephase earth fault
Line function, then the number of turns that less input；Alternatively, need to enable the protective device starting tripping function of turn-adjusting arc-extinguishing winding,
Turn-adjusting arc-extinguishing winding is protected, failure is quickly isolated, then puts into more the number of turns.
P3 carries out the singlephase earth fault to sentence phase and route selection.
After starting reversed polarity winding, reversed polarity winding and turn-adjusting arc-extinguishing winding collective effect make the perception electricity generated
Perturbation mutation occurs for stream, is realized with this and sentences phase and route selection to singlephase earth fault.I other words reversed polarity winding seals in,
Increase turn-adjusting arc-extinguishing winding inductance current functional mutant.Only inductance current reaches overcompensation state, and it is prominent to generate perturbation
Become, singlephase earth fault just can be achieved sentences phase and route selection.
It is so-called to sentence mutually and route selection by taking electric system includes A, B, C three-phase as an example, be determining singlephase earth fault occur A,
B, which route of which phase in C three-phase finds out failure and point occurs.Accurate judgement failure generation point is particularly significant, if sentencing
Dislocation misses, it is likely that causes singlephase earth fault to develop into double earthfault, fault coverage is magnified.
And limited by switch and gear, only accessing turn-adjusting arc-extinguishing winding cannot achieve inductance current to electric system appearance
The overcompensation of property electric current, therefore, the embodiment of the present application sealed in reversed polarity winding, it can be achieved that arc suppression coil overcompensation, make it
Inductance current generate perturbation mutation, with accurate judgement singlephase earth fault occur which phase which route, thus
Fault coverage expands, and improves Operation of Electric Systems reliability.
P4 makes the reversed polarity winding be in bypass condition, and the turn-adjusting arc-extinguishing winding works on, and handles the list
Phase ground fault.
After finding failure generation point, reversed polarity winding is closed, bypass condition is at；At this point, by turn-adjusting extinguishing arc
Coil works on, and generates the capacity current of inductance current compensation electric system.Next, being that point, people occur for positioning failure
Work handles singlephase earth fault, and the operating of electric system is made to restore normal.
After the completion of the processing of singlephase earth fault described in P5, the turn-adjusting arc-extinguishing winding enters to operating status, the electricity
Force system restores to run well.
After the completion of singlephase earth fault processing, power system recovery runs well, and turn-adjusting arc-extinguishing winding just no longer works,
Into to operating status.If ground fault occurs again, turn-adjusting arc-extinguishing winding monitors to generate ground connection capacity current, setting
Self-starting resistance box will make turn-adjusting arc-extinguishing winding automatically into working condition, generate the appearance of inductance current compensation electric system
Property electric current；If ground fault non-transient failure, starts reversed polarity winding, turn-adjusting arc-extinguishing winding is made to reach overcompensation state.
Before the optional P1, further includes:
S1 acquires the voltage and current signals of the electric system；
S2 judges the operating status of the electric system according to the voltage and current signals, identifies the electric system
Whether singlephase earth fault is occurred；
If singlephase earth fault occurs for S3 electric system, the turn-adjusting arc-extinguishing winding work judges the single-phase earthing
Whether failure is transient fault.
Such as Fig. 2, whether electric system system occurs singlephase earth fault, and further, whether ground fault is instantaneity
Failure also needs to judge by above-mentioned steps.
Whether electric system occurs singlephase earth fault, according to whether there is ground connection capacity current to generate to judge.Cause
This, needs to carry out electric system real-time monitoring, collection voltages and current signal, according to there is no ground capacity current signal to produce
It is raw, judge the operating status of electric system, identifies whether that singlephase earth fault occurs.
If generating ground connection capacity current, singlephase earth fault occurs, turn-adjusting arc-extinguishing winding monitors the model, will
Self-starting enters working condition, generates the capacity current of inductance current compensation electric system.
After being started according to turn-adjusting arc-extinguishing winding, whether singlephase earth fault handles completion, turn-adjusting arc-extinguishing winding work
Process duration, to judge whether singlephase earth fault is transient fault.Specifically, turn-adjusting arc-extinguishing winding investment is in short-term
It is interior, ground connection capacity current is just no longer generated, turn-adjusting arc-extinguishing winding enters to operating status, then singlephase earth fault is instantaneity
Failure is not required to investment reversed polarity winding, and the inductance current generated by turn-adjusting arc-extinguishing winding itself eliminates fault point electric arc；If adjusting
The time of circle formula arc suppression coil operation is long, and persistently has ground connection capacity current to generate, then singlephase earth fault is non-transient event
Barrier, need to put into nonpolar winding, turn-adjusting arc-extinguishing winding made to reach overcompensation state, realize singlephase earth fault sentence mutually and
Route selection, after positioning, artificial treatment singlephase earth fault.
Optionally, after the S3, further includes:
If the Q1 singlephase earth fault is the transient fault, the reversed polarity winding is in bypass condition；
Turn-adjusting arc-extinguishing winding described in Q2 exports inductance current, compensates the capacity current of the electric system；
Transient fault described in Q3 disappears, then the turn-adjusting arc-extinguishing winding enters to operating status, the electric system
Restore to run well.
When singlephase earth fault is transient fault, the inductance current adequate remedy electric power of turn-adjusting arc-extinguishing winding generation
The capacity current of system, and do not need ground fault is carried out to sentence mutually and therefore route selection is started without reversed polarity winding, it is this
In the case of, reversed polarity winding is in bypass condition.
Turn-adjusting arc-extinguishing winding exports inductance current, compensates the capacity current of electric system.After transient fault disappears, if
The turn-adjusting arc-extinguishing winding for being equipped with self-starting resistance box just stops working, and into operating status, power system recovery is normally transported
Turn.Though turn-adjusting arc-extinguishing winding does not work, the operational situation of electric system can be continued to monitor, once ground fault occurs, is produced
Raw ground connection capacity current, just independently launches into working condition, generates the capacity current of inductance current compensation electric system.
Optionally, the number of turns of the reversed polarity winding of investment is arranged in the demand according to the electric system, packet
It includes:
If only needing the inductance current of the turn-adjusting arc-extinguishing winding output to generate disturbance, with this to the single-phase earthing
Failure sentence mutually and route selection, then the number of turns of the reversed polarity winding put into are the first preset quantity；
If desired realize that the protective device starting tripping to the turn-adjusting arc-extinguishing winding, isolated fault route are then put into
The reversed polarity winding the number of turns be the second preset quantity；
Wherein, first preset quantity is less than second preset quantity.
The reversed polarity winding of different the number of turns can be put into according to the demand of electric system.Specifically, it is only necessary to turn-adjusting be made to disappear
Perturbation mutation occurs for the inductance current that arc coil generates, and tens amperes of mutation compensation electric current is generated, to realize to single-phase
Ground fault sentences phase and route selection, then puts into the reversed polarity winding of first preset quantity the number of turns；If desired make turn-adjusting arc blowout wire
The protective device of circle can starting tripping function, protect turn-adjusting arc-extinguishing winding, quickly isolate failure, then put into the second present count
Measure the reversed polarity winding of the number of turns.
Compared with the trip protection function of the protective device of starting turn-adjusting arc-extinguishing winding, it is only necessary to generate tens amperes
Mutation compensation electric current, be grounded failure sentences phase and route selection, small more, the reversed polarity winding throwing of the overcompensation inductance current needed
The number of turns entered is opposite just few very much, and therefore, the first preset quantity is less than the second preset quantity.
Optionally, the number of turns of the reversed polarity winding is the 10%-50% of the number of turns of the turn-adjusting arc-extinguishing winding.
According to the size of perturbation amplitude needed for turn-adjusting arc-extinguishing winding inductance current, electric system needs turn-adjusting arc blowout wire
The size for enclosing overcompensation amount, sets the number of turns of reversed polarity winding to the 10%-50% of turn-adjusting arc-extinguishing winding the number of turns, specifically
, it can be 15%, 20%, 25%, 30%, 35%, 40%, 45% etc., in this regard, the embodiment of the present application is not specifically limited.
Optionally, the number of turns of the turn-adjusting arc-extinguishing winding investment, generates when running well according to the electric system
The current signal determines.
It is provided with multiple groups gear on turn-adjusting arc-extinguishing winding, is connected by switch control with a certain gear, to adjust investment
The number of turns of turn-adjusting arc-extinguishing winding.In this regard, current signal when being run well by acquisition electric system, that is, know ground fault
When electric system capacity current size, obtain turn-adjusting arc-extinguishing winding and need the inductance current size that compensates, calculate accordingly
Turn-adjusting arc-extinguishing winding needs the number of turns put into.
Optionally, the reversed polarity winding is serially connected between two parts same polarity winding of the turn-adjusting arc-extinguishing winding,
Also, the reversed polarity winding is opposite with the direction of winding of the turn-adjusting arc-extinguishing winding.
Such as Fig. 3, in the embodiment of the present application, reversed polarity winding is serially connected with two parts same polarity winding of turn-adjusting arc-extinguishing winding
Between, figure middle and upper part is the winding of turn-adjusting arc-extinguishing winding itself, and lower part is reversed polarity winding.
The direction of winding of reversed polarity winding and turn-adjusting arc-extinguishing winding on the contrary, i other words reversed polarity winding generate magnetic flux with
Turn-adjusting arc-extinguishing winding is contrary, then the investment of reversed polarity winding reduces the magnetic flux of turn-adjusting arc-extinguishing winding, is equivalent to
Reduce investment the number of turns of turn-adjusting arc-extinguishing winding.Investment the number of turns is reduced, inductance decline, then inductance current increases, and makes to adjust circle
Formula arc suppression coil reaches overcompensation state.
A kind of method solving singlephase earth fault based on turn-adjusting arc-extinguishing winding provided by the present application, sends out in electric system
Raw singlephase earth fault, and when non-transient failure, not only puts into turn-adjusting arc-extinguishing winding, meanwhile, also put into reversed polarity around
Group；The capacity current for the inductance current compensation electric system that turn-adjusting arc-extinguishing winding generates, reversed polarity winding are serially connected with turn-adjusting
Between two parts same polarity winding of arc suppression coil, also, the direction of winding of reversed polarity winding and turn-adjusting arc-extinguishing winding on the contrary,
Therefore, the investment of reversed polarity winding can reduce the magnetic flux of original turn-adjusting arc-extinguishing winding, increase the inductance current of its generation,
Turn-adjusting arc-extinguishing winding is set to enter overcompensation state；During this period, the reversed polarity of investment can be set according to the demand of electric system
The number of turns of winding adjusts the degree of arc suppression coil overcompensation.Arc suppression coil reaches overcompensation state, the inductance current hair generated
Raw perturbation mutation, can be realized and sentence phase and route selection to singlephase earth fault；It has been determined that singlephase earth fault occurs in electric power
Which phase of system after which route, makes reversed polarity winding be in bypass condition, arc suppression coil, which works on, compensates capacitive
Electric current, this phase process singlephase earth fault.After the completion of singlephase earth fault processing, power system recovery runs well, due to
The investment of the self-starting resistance box of turn-adjusting arc-extinguishing winding after ground connection extinguishing arc, turn-adjusting arc-extinguishing winding can automatically exit from compensation operation
State, into operating status.Method provided by the present application improves the structure and function of arc suppression coil, in addition to can be achieved to disappear
Arc coil the number of turns is adjustable, except inductance is adjustable, also adds arc suppression coil inductance current functional mutant.By sealing in antipole
Property winding, change turn-adjusting arc-extinguishing winding iron core in magnetic flux.To make arc suppression coil inductance current that perturbation mutation occur,
Realize singlephase earth fault sentences phase route selection function.
It should be noted that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that including the article of a series of elements or equipment not only includes those elements, but also including not having
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited in the case where more limiting by sentence "including a ...", it is not excluded that in the mistake including the element
There is also other identical elements in journey, method, article or equipment.
The above is only the specific embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
It should be understood that the application is not limited to the content for being described above and being shown in the accompanying drawings, and can
To carry out various modifications and change without departing from the scope.Scope of the present application is only limited by the accompanying claims.
Claims (6)
1. a kind of method for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, which is characterized in that the described method includes:
If the P1 singlephase earth fault non-transient failure, the turn-adjusting arc-extinguishing winding exports inductance current, compensates electric power
The capacity current of system；Meanwhile starting the work of reversed polarity winding, so that the turn-adjusting arc-extinguishing winding is entered overcompensation state,
In, the reversed polarity winding is serially connected between two parts same polarity winding of the turn-adjusting arc-extinguishing winding, also, the antipole
Property winding is opposite with the direction of winding of the turn-adjusting arc-extinguishing winding；
The number of turns of the reversed polarity winding of investment is arranged according to the demand of the electric system in P2；
P3 carries out the singlephase earth fault to sentence phase and route selection；
P4 makes the reversed polarity winding be in bypass condition, and the turn-adjusting arc-extinguishing winding works on, and handles described single-phase connect
Earth fault；
After the completion of the processing of singlephase earth fault described in P5, the turn-adjusting arc-extinguishing winding enters to operating status, the power train
System restores to run well.
2. the method according to claim 1 for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, which is characterized in that
Before the P1, further includes:
S1 acquires the voltage and current signals of the electric system；
S2 judges the operating status of the electric system according to the voltage and current signals, whether identifies the electric system
Singlephase earth fault occurs；
If singlephase earth fault occurs for S3 electric system, the turn-adjusting arc-extinguishing winding work judges the singlephase earth fault
It whether is transient fault.
3. the method according to claim 2 for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, which is characterized in that
After the S3, further includes:
If the Q1 singlephase earth fault is the transient fault, the reversed polarity winding is in bypass condition；
Turn-adjusting arc-extinguishing winding described in Q2 exports inductance current, compensates the capacity current of the electric system；
Transient fault described in Q3 disappears, then the turn-adjusting arc-extinguishing winding enters to operating status, the power system recovery
It runs well.
4. the method according to claim 1 for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, which is characterized in that
The number of turns of the reversed polarity winding of investment is arranged in the demand according to the electric system, comprising:
If only needing the inductance current of the turn-adjusting arc-extinguishing winding output to generate disturbance, with this to the singlephase earth fault
Sentence mutually and route selection, then the number of turns of the reversed polarity winding put into are the first preset quantity；
If desired the protective device starting tripping to the turn-adjusting arc-extinguishing winding, isolated fault route, the then institute put into are realized
The number of turns for stating reversed polarity winding is the second preset quantity；
Wherein, first preset quantity is less than second preset quantity.
5. the method according to claim 4 for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, which is characterized in that
The number of turns of the reversed polarity winding is the 10%-50% of the number of turns of the turn-adjusting arc-extinguishing winding.
6. the method according to claim 1 for solving singlephase earth fault based on turn-adjusting arc-extinguishing winding, which is characterized in that
The number of turns of turn-adjusting arc-extinguishing winding investment, the current signal generated when running well according to the electric system determine.
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