CN109103846A - It is a kind of based on than mutually and than width principle pumping energy reactor protection method and system - Google Patents
It is a kind of based on than mutually and than width principle pumping energy reactor protection method and system Download PDFInfo
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- CN109103846A CN109103846A CN201811139584.5A CN201811139584A CN109103846A CN 109103846 A CN109103846 A CN 109103846A CN 201811139584 A CN201811139584 A CN 201811139584A CN 109103846 A CN109103846 A CN 109103846A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
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Abstract
The invention discloses a kind of based on than phase and than the pumping energy reactor protection method and system of width principle; by judging the zero-sequence current of the principal reactance winding calculated, taking out whether energy winding side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding, pumping energy winding side zero-sequence current Sudden Changing Rate and curent change coefficient meet than phase criterion or arbitrarily than width criterion; take out whether energy reactor protection acts and at the same time meeting differential threshold criterion and determining; it can reactor protection movement if satisfied, then taking out；It is failure to actuate conversely, taking out energy reactor protection.The present invention improves the reliability for taking out energy reactor protection；It takes out energy reactor protection and is not necessarily to voltage, protecting in the case where PT broken string can action message；Taking out energy reactor protection can protect principal reactance winding inter-turn failure to have the institute of zero-sequence current faulty with energy winding inter-turn failure and other is taken out simultaneously, avoid the redundant configuration of protection；Energy reactor protection high sensitivity is taken out, can identify slight turn-to-turn fault.
Description
Technical field
The present invention relates to electrical technology relay protection fields, and more particularly, to one kind based on than mutually and than width original
The pumping energy reactor protection method and system of reason.
Background technique
Pumping energy shunt reactor is super-pressure, remote transmission network provides reactive compensation, while may be outlyingly
The switchyard that area, unregulated power are supplied provides safe and stable and efficient power supply.Its working principle is that in high-voltage parallel reactance compensation
While route capacitive reactive power, part energy is extracted out directly from reactor for switchyard illumination and other using energy winding is taken out
Household electricity, it is very small by taking out the energy that energy winding is extracted, it will not influence the safe and stable operation of shunt reactor.
Current pumping energy winding inter-turn protection is using locking criterion outside the zero sequence overcurrent criterion fitting area for taking out energy winding through prolonging
When act, tripping is taken out can reactor institute line trackside breaker.Occur under ground short circuit fault condition outside Chou Neng reactor area,
If locking criterion cannot reliably be latched external area error outside area, and the zero-sequence current for taking out energy winding is adjusted greater than preset zero-sequence current
It is worth, the duration is more than to take out energy winding inter-turn guard time definite value, causes to take out energy winding inter-turn protection misoperation, and then influence to take out
The safe and stable operation of energy reactor.
The interturn protection of existing pumping energy reactor there are setting value order difficulty, take out can winding inter-turn failure when sensitivity not
The problems such as foot, there are malfunction risks in external area error.Energy winding inter-turn failure is taken out in order to quickly cut off, avoids taking out energy
Energy reactor is entirely taken out in the damage of winding inter-turn fault progression, improves and takes out energy reactor protection reliability, guarantees that pumping can reactor peace
Row for the national games, it is necessary to which configuration is taken out energy winding inter-turn protection and supplemented.
Summary of the invention
The present invention propose it is a kind of based on than mutually and than width principle pumping energy reactor protection method and system, with solve how
Improve the problem of taking out energy reactor protection reliability.
To solve the above-mentioned problems, according to an aspect of the invention, there is provided it is a kind of based on than mutually and than width principle
Take out energy reactor protection method, which comprises
It respectively can the principal reactance device side of reactor and the current transformer sampled value meter of pumping energy winding side according to taking out for acquisition
Calculate the zero-sequence current of principal reactance winding, take out can winding side zero-sequence current, principal reactance winding zero-sequence current Sudden Changing Rate and take out can be around
Group side zero-sequence current Sudden Changing Rate；
The short circuit of energy winding side will be taken out, applies the voltage of predetermined voltage threshold on any one phase winding of principal reactance device, point
Not Ce Liang principal reactance device and take out can winding side the phase current amplitude, and according to the principal reactance device and take out can winding the phase
Current amplitude calculating current variation coefficient；Wherein, any one phase is A, B or C phase；
The zero-sequence current for judging the zero-sequence current of the principal reactance winding, taking out energy winding side zero-sequence current, principal reactance winding
Sudden Changing Rate, take out can winding side zero-sequence current Sudden Changing Rate and curent change coefficient whether meet than phase criterion or arbitrarily sentence than width
According to, and at the same time meet differential threshold criterion, it can reactor protection movement if satisfied, then taking out；Conversely, taking out energy reactor protection not
Movement.
Preferably, wherein described respectively can the principal reactance device side of reactor and the electric current of pumping energy winding side according to taking out for acquisition
The zero-sequence current that mutual inductor sample value calculates the zero-sequence current of principal reactance winding, takes out energy winding side zero-sequence current, principal reactance winding
Sudden Changing Rate and pumping energy winding side zero-sequence current Sudden Changing Rate, comprising:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；WithRespectively
The current phasor value of principal reactance device side；WithThe respectively current phasor value of principal reactance device side；T is fundamental signal week
Time phase.
Preferably, wherein utilizing following formula calculating current variation coefficient:
Wherein, KfFor curent change coefficient；For main reactor any one phase current amplitude；It can winding to smoke
The current amplitude of any one phase.
Preferably, wherein
It is described than phase criterion are as follows:
It is described to include: than width criterion
First than width criterion are as follows:
Second than width criterion are as follows:
The differential threshold criterion are as follows:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；KfFor curent change coefficient；
kset1For first than width criterion restraint coefficient；kset2For second than width criterion restraint coefficient；IsetFor preset differential definite value.
According to another aspect of the present invention, it provides a kind of based on than phase and than the pumping energy reactor protection system of width principle
System, the system comprises:
Zero-sequence current and zero-sequence current Sudden Changing Rate computing unit, for respectively according to the principal reactance for taking out energy reactor of acquisition
Device side and the current transformer sampled value for taking out energy winding side calculate the zero-sequence current of principal reactance winding, pumping can winding side zero sequence electricity
Stream, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping can winding side zero-sequence current Sudden Changing Rates；
Curent change coefficient calculation unit, for the short circuit of energy winding side will to be taken out, on any one phase winding of principal reactance device
Apply the voltage of predetermined voltage threshold, measure principal reactance device respectively and take out the current amplitude of the phase of energy winding side, and according to institute
It states principal reactance device and takes out the current amplitude calculating current variation coefficient of the phase of energy winding；Wherein, any one phase is A, B or C phase；
Protection act unit, for judging the zero-sequence current of the principal reactance winding, taking out energy winding side zero-sequence current, main electricity
Whether zero-sequence current Sudden Changing Rate, pumping energy winding side zero-sequence current Sudden Changing Rate and the curent change coefficient of anti-winding meet than phase criterion
Or arbitrarily than width criterion, and at the same time meet differential threshold criterion, it can reactor protection movement if satisfied, then taking out；Conversely, taking out
Energy reactor protection is failure to actuate.
Preferably, wherein the zero-sequence current and zero-sequence current Sudden Changing Rate computing unit, electric according to the pumping of acquisition energy respectively
The principal reactance device side of anti-device and take out can the current transformer sampled value of winding side calculate that the zero-sequence current of principal reactance winding, take out can be around
Group side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping energy winding side zero-sequence current Sudden Changing Rate, comprising:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；WithRespectively
The current phasor value of principal reactance device side；WithThe respectively current phasor value of principal reactance device side；T is fundamental signal week
Time phase.
Preferably, wherein in the curent change coefficient calculation unit, following formula calculating current variation coefficient is utilized:
Wherein, KfFor curent change coefficient；For main reactor any one phase current amplitude；It can winding to smoke
The current amplitude of any one phase.
Preferably, wherein
It is described than phase criterion are as follows:
It is described to include: than width criterion
First than width criterion are as follows:
Second than width criterion are as follows:
The differential threshold criterion are as follows:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；KfFor curent change coefficient；
kset1For first than width criterion restraint coefficient；kset2For second than width criterion restraint coefficient；IsetFor preset differential definite value.
The present invention provides a kind of based on than phase and than the pumping energy reactor protection method and system of width principle, utilizes and takes out energy
The characteristic of shunt reactor lower coupling is passed through based on pumping energy reactor differential protecting method is constituted than facies principle and than width principle
Judge the zero-sequence current of the principal reactance winding calculated, take out can winding side zero-sequence current, principal reactance winding zero-sequence current Sudden Changing Rate,
It takes out energy winding side zero-sequence current Sudden Changing Rate and whether curent change coefficient meets than phase criterion or arbitrarily than width criterion, and is same
When meet differential threshold criterion determine take out can reactor protection whether act, can reactor protection movement if satisfied, then taking out；Instead
It, takes out energy reactor protection and is failure to actuate.It is of the invention smoke can reactor protection method substantially increase and smoke energy reactor protection
Reliability；It takes out energy reactor protection and is not necessarily to voltage, protecting in the case where PT broken string can action message；Taking out can reactor protection energy
Principal reactance winding inter-turn failure is protected simultaneously and taking out energy winding inter-turn failure and other has the institute of zero-sequence current faulty, is avoided
The redundant configuration of protection；Energy reactor protection high sensitivity is taken out, can identify slight turn-to-turn fault；Taking out can reactor protection definite value
Without manually adjusting, solve the problems, such as that existing pumping energy reactor protection fixed value adjusting is difficult.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is according to embodiment of the present invention based on than smoking energy reactor protection method 100 mutually and than width principle
Flow chart；
Fig. 2 is the pumping energy reactor protection decision logic figure according to embodiment of the present invention；
Fig. 3 is that energy reactor differential protection result figure is taken out according to the external area error of embodiment of the present invention；
Fig. 4 is to protect result figure according to 1% turn-to-turn fault of embodiment of the present invention principal reactance device side A phase；
Fig. 5 is to take out A phase 5% turn-to-turn fault in energy winding side according to embodiment of the present invention to protect result figure；
Fig. 6 is according to embodiment of the present invention based on than smoking energy reactor protection system 600 mutually and than width principle
Structural schematic diagram.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is according to embodiment of the present invention based on than smoking energy reactor protection method 100 mutually and than width principle
Flow chart.As shown in Figure 1, embodiments of the present invention provide based on than mutually and than width principle pumping energy reactor protection side
Method takes out the differential guarantor of energy reactor based on constituting than facies principle and than width principle using the characteristic of pumping energy shunt reactor lower coupling
Maintaining method, the zero-sequence current of the principal reactance winding calculated by judgement, the zero sequence for taking out energy winding side zero-sequence current, principal reactance winding
Jump-value of current, take out can winding side zero-sequence current Sudden Changing Rate and curent change coefficient whether meet than phase criterion or arbitrarily compare width
Criterion takes out whether energy reactor protection acts and at the same time meeting differential threshold criterion and determining, can reactor guarantor if satisfied, then taking out
Shield movement；It is failure to actuate conversely, taking out energy reactor protection.The pumping energy reactor protection method that embodiments of the present invention provide is abundant
Improve the reliability for taking out energy reactor protection；Pumping energy reactor protection is not necessarily to voltage, protects energy can in the case where PT broken string
By movement；Taking out energy reactor protection and capable of protecting principal reactance winding inter-turn failure simultaneously and take out energy winding inter-turn failure and other has
The institute of zero-sequence current is faulty, avoids the redundant configuration of protection；Energy reactor protection high sensitivity is taken out, can identify slight turn-to-turn
Failure；Pumping energy reactor protection definite value solves asking for existing pumping energy reactor protection fixed value adjusting difficulty without artificial adjusting
Topic.Embodiments of the present invention provide based on than mutually and than width principle pumping energy reactor protection method 100 from step 101
Beginning is adopted according to the current transformer of the principal reactance device side for taking out energy reactor of acquisition and pumping energy winding side respectively in step 101
Sample value calculate the zero-sequence current of principal reactance winding, take out can winding side zero-sequence current, principal reactance winding zero-sequence current Sudden Changing Rate and
Taking out can winding side zero-sequence current Sudden Changing Rate.
Preferably, wherein described respectively can the principal reactance device side of reactor and the electric current of pumping energy winding side according to taking out for acquisition
The zero-sequence current that mutual inductor sample value calculates the zero-sequence current of principal reactance winding, takes out energy winding side zero-sequence current, principal reactance winding
Sudden Changing Rate and pumping energy winding side zero-sequence current Sudden Changing Rate, comprising:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；WithRespectively
The current phasor value of principal reactance device side；WithThe respectively current phasor value of principal reactance device side；T is fundamental signal week
Time phase.
Preferably, the short circuit of energy winding side will be taken out in step 102, and will apply default electricity on any one phase winding of principal reactance device
The voltage of threshold value is pressed, measure principal reactance device respectively and takes out the current amplitude of the phase of energy winding side, and according to the principal reactance device
With the current amplitude calculating current variation coefficient for the phase for taking out energy winding；Wherein, any one phase is A, B or C phase.
Preferably, wherein utilizing following formula calculating current variation coefficient:
Wherein, KfFor curent change coefficient；For main reactor any one phase current amplitude；It can winding to smoke
The current amplitude of any one phase.
Preferably, judge that the zero-sequence current of the principal reactance winding, pumping can winding side zero-sequence currents, main electricity in step 103
Whether zero-sequence current Sudden Changing Rate, pumping energy winding side zero-sequence current Sudden Changing Rate and the curent change coefficient of anti-winding meet than phase criterion
Or arbitrarily than width criterion, and at the same time meet differential threshold criterion, it can reactor protection movement if satisfied, then taking out；Conversely, taking out
Energy reactor protection is failure to actuate.
Preferably, wherein
It is described than phase criterion are as follows:
It is described to include: than width criterion
First than width criterion are as follows:
Second than width criterion are as follows:
The differential threshold criterion are as follows:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；KfFor curent change coefficient；
kset1For first than width criterion restraint coefficient；kset2For second than width criterion restraint coefficient；IsetFor preset differential definite value.
Fig. 2 is the pumping energy reactor protection decision logic figure according to embodiment of the present invention.As shown in Fig. 2, described compare phase
Criterion, first judge with the progress of differential threshold criterion with door after OR-gate than width criterion and second than width criterion, if satisfied, then
Taking out can reactor protection movement；It is failure to actuate conversely, taking out energy reactor protection.
In embodiments of the present invention, firstly, being sampled according to the current transformer for the principal reactance device side for taking out energy reactor
Value iA1、iB1And iC1Calculate the current phasor value of principal reactance device sideWithAccording to the current transformer for taking out energy winding side
Sampled value ia2、ib2And ic2Calculate the current phasor value of principal reactance device sideWith
Then, the zero-sequence current of principal reactance winding is calculated are as follows:Take out the zero-sequence current of energy winding side are as follows:The zero-sequence current Sudden Changing Rate of principal reactance winding are as follows:Taking out can winding side
Zero-sequence current Sudden Changing Rate are as follows:Wherein, T is fundamental signal cycle time.
Then, the short circuit of energy winding side will be taken out, applies voltage U in principal reactance device A phase windingAX, measure the A phase of principal reactance device
Current amplitude IAAnd take out the current amplitude I of the A phase of energy windinga, and calculating current variation coefficient
Finally, judging the zero-sequence current of principal reactance windingTake out the zero-sequence current of energy winding sidePrincipal reactance around
The zero-sequence current Sudden Changing Rate of groupTake out the zero-sequence current Sudden Changing Rate of energy winding sideWith curent change COEFFICIENT KfIt is
No satisfaction is than phase criterion or arbitrarily than width criterion, and at the same time meet differential threshold criterion, it can reactor guarantor if satisfied, then taking out
Shield movement；It is failure to actuate conversely, taking out energy reactor protection.Wherein, than phase criterion are as follows:Than width criterion packet
Include: first than width criterion are as follows:Second than width criterion are as follows:Differential threshold is sentenced
According to are as follows:kset1For first than width criterion restraint coefficient, kset1=4；kset2For second than width criterion
Restraint coefficient, kset2=6；IsetFor preset differential definite value.
Fig. 3 is that energy reactor differential protection result figure is taken out according to the external area error of embodiment of the present invention.As shown in figure 3,
Take out can bus A phase metallic earthing failure outside reactor generating region, than phase criterion, first than width criterion (than width criterion 1) and the
Two are not satisfied than width criterion 2 (than width criterion 2), than phase criterion and than width criterion as a result, with differential criterion progress and door, no
Meet and take out energy reactor protection operation condition, protection is reliably failure to actuate.
Fig. 4 is to protect result figure according to 1% turn-to-turn fault of embodiment of the present invention principal reactance device side A phase.As shown in figure 4,
It takes out energy reactor and 1% turn-to-turn fault of principal reactance device side A phase occurs, meet than phase criterion and differential threshold criterion, taking out can reactor
Protect action message.
Fig. 5 is to take out A phase 5% turn-to-turn fault in energy winding side according to embodiment of the present invention to protect result figure.As shown in figure 5,
It takes out energy reactor to occur to take out 5% turn-to-turn fault of energy side A phase, first meets than width criterion and differential threshold criterion, and pumping can reactor
Protect action message.
Fig. 6 is according to embodiment of the present invention based on than smoking energy reactor protection system 600 mutually and than width principle
Structural schematic diagram.As shown in fig. 6, embodiments of the present invention provide based on than mutually and than width principle pumping energy reactor protection
System 600, comprising: zero-sequence current and zero-sequence current Sudden Changing Rate computing unit 601, curent change coefficient calculation unit 602 and guarantor
Protect motor unit 603.
Preferably, the zero-sequence current and zero-sequence current Sudden Changing Rate computing unit 601, for respectively according to the pumping energy of acquisition
The principal reactance device side of reactor and the current transformer sampled value for taking out energy winding side calculate the zero-sequence current of principal reactance winding, take out energy
Winding side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping can winding side zero-sequence current Sudden Changing Rates.
Preferably, wherein the zero-sequence current and zero-sequence current Sudden Changing Rate computing unit 601, respectively according to the pumping energy of acquisition
The principal reactance device side of reactor and the current transformer sampled value for taking out energy winding side calculate the zero-sequence current of principal reactance winding, take out energy
Winding side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping energy winding side zero-sequence current Sudden Changing Rate, comprising:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；Based on
The zero-sequence current Sudden Changing Rate of reactance winding；It can winding side zero-sequence current Sudden Changing Rate to take out；WithBased on respectively
The current phasor value of reactor side；WithThe respectively current phasor value of principal reactance device side；T is the fundamental signal period
Time.
Preferably, the curent change coefficient calculation unit 602, for the short circuit of energy winding side will to be taken out, in principal reactance device
Apply the voltage of predetermined voltage threshold on any one phase winding, measure principal reactance device respectively and takes out the electric current of the phase of energy winding side
Amplitude, and according to the current amplitude calculating current variation coefficient of the principal reactance device and the phase for taking out energy winding；Wherein, any one
It is mutually A, B or C phase.
Preferably, wherein in the curent change coefficient calculation unit 602, change system using following formula calculating current
Number:
Wherein, KfFor curent change coefficient；For main reactor any one phase current amplitude；It can winding to smoke
The current amplitude of any one phase.
Preferably, the protection act unit 603, for judging the zero-sequence current of the principal reactance winding, taking out energy winding
Side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding, pumping can winding side zero-sequence current Sudden Changing Rate and curent change coefficients
Whether meet than phase criterion or arbitrarily than width criterion, and at the same time meet differential threshold criterion, it can reactor if satisfied, then taking out
Protection act；It is failure to actuate conversely, taking out energy reactor protection.
It is preferably, wherein described than phase criterion are as follows:It is described to include: than width criterion
First than width criterion are as follows:Second than width criterion are as follows:
The differential threshold criterion are as follows:Wherein,For the zero-sequence current of principal reactance winding；
It can winding side zero-sequence current to take out；For the zero-sequence current Sudden Changing Rate of principal reactance winding；It can winding side zero to take out
Sequence jump-value of current；KfFor curent change coefficient；kset1For first than width criterion restraint coefficient；kset2For second than width criterion
Restraint coefficient；IsetFor preset differential definite value.
The embodiment of the present invention based on than mutually and than width principle take out can reactor protection system 600 with it is of the invention another
One embodiment based on than mutually and it is more corresponding than the pumping energy reactor protection method 100 of width principle, details are not described herein.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (8)
1. a kind of based on than phase and than the pumping energy reactor protection method of width principle, which is characterized in that the described method includes:
It is calculated and is led according to the current transformer sampled value of the principal reactance device side for taking out energy reactor of acquisition and pumping energy winding side respectively
The zero-sequence current of reactance winding takes out energy winding side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping energy winding side
Zero-sequence current Sudden Changing Rate；
The short circuit of energy winding side will be taken out, applies the voltage of predetermined voltage threshold on any one phase winding of principal reactance device, surveys respectively
The current amplitude of principal reactance device with the phase for taking out energy winding side is measured, and according to the electricity of the principal reactance device and the phase for taking out energy winding
It flows amplitude and calculates curent change coefficient；Wherein, any one phase is A, B or C phase；
The zero-sequence current mutation for judging the zero-sequence current of the principal reactance winding, taking out energy winding side zero-sequence current, principal reactance winding
Whether amount, pumping energy winding side zero-sequence current Sudden Changing Rate and curent change coefficient meet than phase criterion or arbitrarily than width criterion, and
And meet differential threshold criterion simultaneously, it can reactor protection movement if satisfied, then taking out；It is failure to actuate conversely, taking out energy reactor protection.
2. the method according to claim 1, wherein described respectively according to the principal reactance for taking out energy reactor of acquisition
Device side and the current transformer sampled value for taking out energy winding side calculate the zero-sequence current of principal reactance winding, pumping can winding side zero sequence electricity
Stream, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping energy winding side zero-sequence current Sudden Changing Rate, comprising:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；For principal reactance
The zero-sequence current Sudden Changing Rate of winding；It can winding side zero-sequence current Sudden Changing Rate to take out；WithElectricity based on respectively
The current phasor value of anti-device side；WithThe respectively current phasor value of principal reactance device side；When T is the fundamental signal period
Between.
3. the method according to claim 1, wherein utilizing following formula calculating current variation coefficient:
Wherein, KfFor curent change coefficient；For main reactor any one phase current amplitude；To take out any of energy winding
The current amplitude of one phase.
4. the method according to claim 1, wherein
It is described than phase criterion are as follows:
It is described to include: than width criterion
First than width criterion are as follows:
Second than width criterion are as follows:
The differential threshold criterion are as follows:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；For principal reactance around
The zero-sequence current Sudden Changing Rate of group；It can winding side zero-sequence current Sudden Changing Rate to take out；KfFor curent change coefficient；kset1It is
One than width criterion restraint coefficient；kset2For second than width criterion restraint coefficient；IsetFor preset differential definite value.
5. a kind of based on than phase and than the pumping energy reactor protection system of width principle, which is characterized in that the system comprises:
Zero-sequence current and zero-sequence current Sudden Changing Rate computing unit, for respectively according to the principal reactance device side for taking out energy reactor of acquisition
The zero-sequence current of principal reactance winding is calculated with the current transformer sampled value for taking out energy winding side, takes out energy winding side zero-sequence current, master
The zero-sequence current Sudden Changing Rate and pumping of reactance winding can winding side zero-sequence current Sudden Changing Rates；
Curent change coefficient calculation unit applies on any one phase winding of principal reactance device for that will take out the short circuit of energy winding side
The voltage of predetermined voltage threshold measures principal reactance device respectively and takes out the current amplitude of the phase of energy winding side, and according to the master
The current amplitude calculating current variation coefficient of the phase of reactor and pumping energy winding；Wherein, any one phase is A, B or C phase；
Protection act unit, for judge the zero-sequence current of the principal reactance winding, take out can winding side zero-sequence current, principal reactance around
Whether zero-sequence current Sudden Changing Rate, pumping energy winding side zero-sequence current Sudden Changing Rate and the curent change coefficient of group meet than phase criterion or appoint
Meaning than width criterion, can reactor protection movement if satisfied, then taking out and at the same time meet differential threshold criterion；It can electricity conversely, taking out
Anti- device protection is failure to actuate.
6. system according to claim 5, which is characterized in that the zero-sequence current and zero-sequence current Sudden Changing Rate calculate list
Member calculates main electricity according to the current transformer sampled value of the principal reactance device side for taking out energy reactor of acquisition and pumping energy winding side respectively
The zero-sequence current of anti-winding takes out energy winding side zero-sequence current, the zero-sequence current Sudden Changing Rate of principal reactance winding and pumping energy winding side zero
Sequence jump-value of current, comprising:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；For principal reactance
The zero-sequence current Sudden Changing Rate of winding；It can winding side zero-sequence current Sudden Changing Rate to take out；WithElectricity based on respectively
The current phasor value of anti-device side；WithThe respectively current phasor value of principal reactance device side；When T is the fundamental signal period
Between.
7. system according to claim 5, which is characterized in that in the curent change coefficient calculation unit, using as follows
Formula calculating current variation coefficient:
Wherein, KfFor curent change coefficient；For main reactor any one phase current amplitude；To take out any of energy winding
The current amplitude of one phase.
8. system according to claim 5, which is characterized in that
It is described than phase criterion are as follows:
It is described to include: than width criterion
First than width criterion are as follows:
Second than width criterion are as follows:
The differential threshold criterion are as follows:
Wherein,For the zero-sequence current of principal reactance winding；It can winding side zero-sequence current to take out；For principal reactance around
The zero-sequence current Sudden Changing Rate of group；It can winding side zero-sequence current Sudden Changing Rate to take out；KfFor curent change coefficient；kset1It is
One than width criterion restraint coefficient；kset2For second than width criterion restraint coefficient；IsetFor preset differential definite value.
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| CN113326630B (en) * | 2021-06-16 | 2024-01-26 | 华北电力大学 | Simulation modeling method and system for energy-extraction type shunt reactor |
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