CN104362920B - A kind of adaptive transformer inrush current suppression apparatus and method - Google Patents
A kind of adaptive transformer inrush current suppression apparatus and method Download PDFInfo
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- CN104362920B CN104362920B CN201410568437.5A CN201410568437A CN104362920B CN 104362920 B CN104362920 B CN 104362920B CN 201410568437 A CN201410568437 A CN 201410568437A CN 104362920 B CN104362920 B CN 104362920B
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- 230000005284 excitation Effects 0.000 claims abstract description 73
- 238000011217 control strategy Methods 0.000 claims abstract description 13
- 230000005347 demagnetization Effects 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims description 75
- 238000004891 communication Methods 0.000 claims description 35
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Keying Circuit Devices (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention discloses a kind of excitation surge current suppressing method and device, this method has considered state of the transformer before idle-loaded switching-on, and takes according to different states different control strategies：When manual brake separating on the spot or remote control separating brake, selection is closed a floodgate with separating brake phase angle identical angle；When being tripped because of short trouble, according to separating brake moment three-phase voltage information, the excitation surge current 0 ~ 360 ° of different closing phase angle moment is estimated, closing phase angle corresponding when excitation surge current is minimum is drawn；When after separating brake through artificial demagnetization, it is 90 ° of combined floodgates to choose any one phase angle of three-phase.The excitation surge current device developed according to this method has the characteristics that：State that can be before automatic identification transformer during no-load closing, and perform corresponding control strategy；The time required to switch combined floodgate can be learnt automatically, and adjust automatically is closed a floodgate and exports triggering moment；Device is provided simultaneously with a full set of electric quantity protective function of transformer.
Description
Technical field
The present invention relates to power system automation technology field, and in particular to a kind of adaptive transformer inrush current suppression apparatus
And method.
Background technology
Power transformer is extremely important electrical equipment in power system, and whether is its safe operation, is directly connected to
Can power system continuously and stably work.When transformer steady-state operation, transformer magnetizing current is only the 1% of rated current
~10%.But when transformer during no-load closing moment, due to transformer core magnetic flux saturation, the presence of relict flux and iron core material
The nonlinear characteristic of material, can produce the sizable excitation surge current of amplitude, stable state is reached by the transient process of several weeks ripple, this
The switching current of individual impact often up to rated current 6~8 times.In addition, the excitation surge current will cause this regional voltage again
Fluctuation, cause the change with the transformer magnetizing current of its paired running, that is, produce and echo surge current.Thus it is likely to result in transformation
Device differential protection misoperation, transformer insulated damage, winding deformation, while reducing power system power supply quality.
It need not increase primary equipment investment because phase selection position combined floodgate suppresses excitation surge current method, and can disappear in theory
Except excitation surge current, therefore the study hotspot suppressed as current transformer excitation flow.Its general principle is by controlling to become
The voltage phase angle at depressor idle-loaded switching-on moment so that the sensing magnetic flux and the residual flux of transformer that closing moment voltage is produced tend to
Unanimously, it is to avoid the excitation surge current caused by magnetic flux conflicts, the amplitude and transient process of excitation surge current are limited to greatest extent.
Scholars propose a variety of control methods for suppressing excitation surge current based on phase selection position combined floodgate technology in recent years, and such as split-phase is opened
Close the rapid closing method and delay combined floodgate method of control, same separating brake phase angle combined floodgate method of threephase switch control etc..With regard to existing excitation
Surge suppression method and apparatus, are primarily present following deficiency.
1st, the surge suppression method of excessive research individual-phase control, and for power transformer, especially shove universal larger
Mesolow power transformer or box type transformer, do not possess the condition of split-phase Operation switch, therefore such method practical application
There is limitation.
2nd, existing excitation surge current suppressing method, considers that transformer trips because of short trouble, and tripping operation descendant is to disappear
Excitation surge current in the case of magnetic suppresses problem.
3rd, existing excitation surge current suppresses control method, and the separating brake phase angle of generally advance controlling switch for example controls 0 ° of A phases
Separating brake, is then closed a floodgate, this control strategy may not apply to transformer short circuit fault situation, since it is considered that quickly with 0 ° of angle again
Property, protection device must be tripped with most fast speed, without selecting some angle to trip.
4th, existing excitation surge current suppressing method, it usually needs the actuation time of setting switch, the on the one hand inconvenience of this way
In engineer applied, on the other hand, with the passage of switching mechanism run time, its actuation time will also change, so as to can influence
The inhibition of excitation surge current.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of adaptive transformer inrush current suppression apparatus and method.The party
Method can solve the problem that excitation surge current problem of the power transformer under a variety of states during idle-loaded switching-on.
The general principle that phase selection position combined floodgate suppresses excitation surge current is as follows：The dominant mechanism that excitation surge current is produced is transformer
The non-linear and magnetic flux of iron core excitation can not be mutated, when the sensing magnetic flux that closing moment voltage is produced differs with transformer residual flux
During cause, to offset the magnetic flux conflict, it then follows the basic law that magnetic flux can not be mutated is, it is necessary to produce a larger exciting current, i.e.,
For excitation surge current.The general principle of controlled closing technology is exactly the initial phase angle by controlling closing moment voltage, makes pre- sensing
Magnetic flux is equal with residual flux, reaches suppression transient state magnetic flux, rapidly enters the purpose of stable state magnetic flux state.
Based on above-mentioned analysis, the technical scheme that the present invention takes is as follows：
A kind of adaptive transformer inrush current suppression apparatus, including analog acquisition module, master control module, communication module, open
Enter module, output module and man-machine interaction module, master control module respectively with analog acquisition module, open into module, output module,
Communication module is connected, and communication module is connected with man-machine interaction module.
Analog acquisition module is used to gather alternating voltage, electric current secondary singal, and gathered data is sent into master control mould
Part；
Open into module be used to gathering the position of the switch, function pressing plate On-off signal signal, and pass through communication bus and master
Control module and carry out internal data interaction；
Outputing module is used to receive and dispatch divide-shut brake order, and is interacted by communication and master control module progress internal data；
Master control module is used for the processing and logical operation of data, including relay protection module suppresses mould with excitation surge current
Block, when short trouble occurs for transformer, relay protection function module identification failure outputs module and sends trip command backward, and
It is labeled as short trouble tripping operation and is sent to excitation surge current suppression module, excitation surge current functional module completes optimal according to control strategy
The calculating of closing phase angle.
Master control module receives the electric current gathered by analog acquisition module, voltage signal, opens the switch position gathered into module
Confidence number, control algolithm is suppressed by the relay protective scheme computing of relay protection module and the excitation surge current of excitation surge current suppression module
Computing, sends divide-shut brake instruction to module is outputed, breaking-closing operating is performed by outputing module.
Communication module is used for the interaction to external information, and communication module receives the computing knot of master control module by internal bus
Really, self-inspection information, and to deliver to external monitoring system in the communication protocol of standard；Communication module receives external monitoring system
Issue telecommand, and by the telecommand information transmission after parsing to master control module；
The man-machine interaction module externally provides operation and display interface.
More preferably, communication bus is spi bus.
More preferably, man-machine interaction module includes touch-screen, signal lamp, involution button.
Excitation surge current suppresses control algolithm computing and specifically includes following steps：
The switch separating brake situation of master control module record includes switch remote control separating brake, switched because being tested before fault trip and combined floodgate
Demagnetization, and specific control strategy is performed according to switch separating brake situation, specific control strategy includes：
(a) when switching remote control separating brake, optimal switching angle is the phase angle at separating brake moment, control A phases or B phases or C phases
Closing phase angle is identical with separating brake phase angle；
(b) when switch is because of fault trip, estimates Three-Phase Transformer remanent magnetism with reference to the information at separating brake moment, pass through ergodic algorithm
Draw three-phase shove minimum closing phase angle；
(c) through testing during demagnetization before switch closes a floodgate, 90 ° of moment of selection A phases close a floodgate.
A kind of adaptive excitation surge current suppressing method, comprises the following steps：
S01, switchs closing time self study：Communication module receives the remote control combined floodgate order of external monitoring system, will
Master control module is sent to after combined floodgate command analysis, when master control module is identified as closing a floodgate first, reclosing command is sent to outputing mould
Part, closing operation is completed by outputing module, is opened and is gathered switch position signal into module and be sent to master control module, master control module is remembered
T the time required to record is issued to position of the switch closure from reclosing command；
S02, switchs separating brake information record：When switch receives remote control separating brake order, or because short circuit occurs for transformer
When failure causes the triggering tripping operation of defencive function module, master control module record switch remote control separating brake or trip protection, master control module
According to AC modules and the analog signalses and switch position signal gathered into module are opened, record switch is from closing when position is changed into point position
Three-phase current, three-phase voltage information；Switch separating brake information record specifically includes following steps：
The position of the switch becomes timesharing triggering recording by closing, and master control module recording voltage and electric current are in switch changed position forward and backward each two
The data of individual cycle, amplitude u of the position of the switch by conjunction variation moment three-phase voltage is calculated through full wave Fourier algorithmfa、ufb、ufcAnd
Phase angle thetafa、θfb、θfc(θfa、θfb、θfcFor separating brake phase angle), the calculating for optimal switching angle provides initial data；
S03, calculates optimal closing phase angle α：According to the separating brake information of step S02 records, calculated and closed next time by master control module
The optimal closing phase angle of lock, specifically includes following steps：
(a) when switch command separating brake, optimal closing phase angle α is the phase angle at separating brake moment, control A phases or B phases or C
The closing phase angle of phase is identical with separating brake phase angle；
Switch remote control separating brake belongs to the symmetrical situation of three-phase residual flux, when manual brake separating or remote control separating brake, belongs to life
Separating brake is made, because the pre- magnetic flux of three-phase and three-phase residual flux are symmetrical, therefore when one in the A phase, B phase, C phase of transformer mutually meets
Pre- magnetic flux is equal with residual flux, then other two-phases also meet accordingly in condition, i.e. A phase, B phase, C phase one mutually meet pre- magnetic flux with
It is identical that the equal processing method of residual flux suppresses processing method with Inrush Current of Transformer；
According to the electromagnetic induction principle of transformer, ignoring logical and excitation resistance pressure drop the situation of stray transformer flux, input
Voltage u (t) and static exciter magnetic flux φ (t) meets following relation：
If u (t)=UmSin (ω t+ σ), then：
Wherein, UmFor input voltage u (t) amplitude, σ is initial phase angle,For rated flux amplitude, N is transformer primary
The side number of turn；
From formula (2), 90 ° of magnetic flux delayed phase voltage-phase when transformer is normally run, it is assumed that transformer is closed
Lock initial phase angle is σ, and the phase angle at separating brake moment is ε, then transformer residual flux φrFor：
Pre- sensing magnetic flux φ (0+) during Transformer Close moment t=0 is：
Make the pre- sensing magnetic flux of closing moment equal with residual flux, you can to control combined floodgate initial phase angle σ and last time separating brake
The phase angle ε at moment is equal；
Therefore, control closing phase angle is identical with a preceding separating brake phase angle, you can eliminates excitation surge current, that is, controls transformer
The closing phase angle of A phases or B phases or C phases is identical with separating brake phase angle.
(b) when switch is because of fault trip, the optimal closing phase angle α that next time closes a floodgate is calculated：
Estimate Three-Phase Transformer remanent magnetism, three-phase remanent magnetism formula is：
U in formulafa、θfaThe respectively amplitude and phase angle of separating brake moment A phase voltages, ufb、θfbRespectively separating brake moment B phases are electric
The amplitude and phase angle of pressure, ufc、θfcThe respectively amplitude and phase angle of separating brake moment C phase voltages；φeFor transformer rated flux, UN
For transformer rated voltage.
φfa、φfb、φfcThe respectively remanent magnetism of transformer A phase, B phase, C phase；
Estimation switchs the pre- sensing magnetic flux of closing moment transformer, and formula is：
φa=-φe cosθ
φb=-φe cos(θ-120°)
φ c=- φecos(θ+120°)(6)
Wherein, φa、φb、φcFor the pre- sensing magnetic flux for the A phase, B phase, C phase for switching closing moment transformer；θ is A phases electricity
Press phase angle, θ ∈ (0 °~360 °)；
Calculated by ergodic algorithm and obtain the minimum closing phase angle of excitation surge current, optimal closing phase angle α be excitation surge current most
Small closing phase angle, optimal closing phase angle α is satisfaction between 0 °~360 °
max(|φa-φfa|,|φb-φfb|,|φc-φfc|) minimum closing phase angle.
Because switch belongs to the asymmetric situation of three-phase residual flux because of fault trip, and remanent magnetism is not zero；Due to residual flux
It is asymmetric, it is impossible to meet the pre- magnetic flux of the three-phase condition equal with three-phase residual flux, therefore can not eliminate excitation surge current in theory,
The maximum minimum that suitable closing phase angle ensures that caused three phase excitation is shoved during combined floodgate can only be chosen.For transformer fault
In the case of trip protection situation, can according to calculate the separating brake moment voltage magnitude and phase angular estimation transformer remanent magnetism, lead to
Cross algorithm traversal and find the pre- magnetic flux of closing a floodgate and conflict with residual flux minimum closing phase angle, reach the purpose that limitation is shoved.
(c) through testing demagnetization before switch closes a floodgate, 90 ° of moment of selection A phases close a floodgate.
Before being closed a floodgate due to switch after testing demagnetization, belong to the symmetrical situation of three-phase residual flux, and remanent magnetism is zero, in remanent magnetism
In the case of being zero, closed a floodgate at the time of any one phase voltage amplitude may be selected for maximum, now voltage magnitude is the mutually temporary of maximum
State magnetic flux is zero, and the transient state magnetic flux of other two-phases is 0.866 times of stable state rated flux, while saturation flux has necessarily abundant
Degree, now excitation surge current can suppress in reduced levels.
S04, calculates the voltage phase angle β corresponding to switch combined floodgate triggering moment：
T the time required to the switch recorded according to step S01 closes a floodgate, and the optimal closing phase angle that step S03 is calculated
α, calculates the phase angle beta of combined floodgate triggering moment, to ensure the phase angle phase for switching the phase angle of actual closing moment with being calculated in S03
Together：
This step is used for the optimal closing phase angle for correcting step S03 calculating；T%20 represents to take the remainder to 20, due to one
Whole wave period is 20ms, and t%20 is used to calculate the surplus after whole wave period；
S05, is closed a floodgate and performs, when communication module receives remote control combined floodgate order, and master control module is sent to after command analysis, when
Master control module is received after reclosing command, the phase angle of monitoring A phase voltages, and compare A phase voltage phase angles and calculated with step S04 in real time
When the combined floodgate triggering phase angle beta gone out is equal, reclosing command is sent to module is outputed (this moment is combined floodgate triggering moment)；
After combined floodgate execution terminates, the master control module monitoring position of the switch, record is required from combined floodgate triggering moment to switch closure
Time, for learning to switch closing time renewal automatically, join to perform switch combined floodgate triggering moment next time and calculating to provide to correct
Number, that is, update t the time required to the switch combined floodgate of step S01 records；
Also include automatic study switch closing time after step S05 to update：Specifically include following steps：
Communication module is sent to master control module after receiving remote control combined floodgate order, command analysis, by master control module according to control
The optimal phase angle of policy selection processed is closed a floodgate, and sends reclosing command to module is outputed, and closing operation, master control are completed by outputing module
The time required to module record is issued to position of the switch closure from reclosing command.Automatic study switch includes device the time required to closing a floodgate
Relay actuation time, operation circuit relay actuation time and breaker trip time etc..
Compared with prior art, the invention has the advantages that：
1st, state that may be present before power transformer idle-loaded switching-on is considered, and take according to different states comprehensively
Different control strategy, it is not necessary to human intervention, with adaptivity；
2nd, power transformer is proposed because short trouble causes after tripping operation, and is encouraged during without being closed a floodgate in the case of artificial demagnetization
The suppressing method that magnetic shoves, solves the limitation of existing excitation surge current engineering application；
3rd, the present invention considers practical application, does not do any control during separating brake, only records its separating brake moment Current Voltage letter
Breath, analysis draws optimal closing phase angle, therefore does not interfere with the rapidity of protection；
4th, the present invention is capable of the closing time of automatic identification switch, i.e., the time required to reclosing command is issued to switch closure,
With self-study habit；
5th, device is provided simultaneously with transformer relay protecting function and excitation surge current and suppresses function, therefore need not be separately configured and encourage
Magnetic incoming current suppression device, had both simplified secondary installing wiring, reduces cost of investment, is easy to operation maintenance to work again.
The excitation surge current device developed according to this method has the characteristics that：Being capable of automatic identification transformer during no-load closing
Preceding state, and perform corresponding control strategy；The time required to switch combined floodgate can be learnt automatically, and adjust automatically is closed a floodgate and exported
Triggering moment；Device is provided simultaneously with a full set of electric quantity protective function of transformer.
Brief description of the drawings
The adaptive transformer inrush current suppression apparatus and transformer connecting structure schematic diagram of Fig. 1 present invention；
Fig. 2 is adaptive transformer inrush current suppression apparatus structural representation of the invention；
Fig. 3 is a kind of adaptive excitation surge current suppressing method flow chart of the present invention.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of adaptive transformer inrush current suppression apparatus, including analog acquisition module (AC moulds
Part), master control module (master control module), communication module (communication module), open into module (opening into module), output module and (output mould
Part) and man-machine interaction module (HMI module), master control module respectively with analog acquisition module, open into module, output module, it is logical
Letter module is connected, and communication module is connected with man-machine interaction module；Analog acquisition module (AC modules) is several.
Analog acquisition module is used to gather alternating voltage, electric current secondary singal, and gathered data is sent into master control mould
Part；
Open into module be used to gathering the position of the switch, function pressing plate On-off signal signal, and pass through SPI (Serial
Peripheral Interface synchronous serials Peripheral Interface) bus and master control module carry out internal data and interact；
Outputing module is used to receive and dispatch divide-shut brake order, and is interacted by spi bus and master control module progress internal data；
Master control module is used for the processing and logical operation of data, including relay protection module suppresses mould with excitation surge current
Block, when short trouble occurs for transformer, relay protection function module identification failure outputs module and sends trip command backward, and
It is labeled as short trouble tripping operation and is sent to excitation surge current suppression module, excitation surge current functional module completes optimal according to control strategy
The calculating of closing phase angle；
Master control module receives the electric current gathered by analog acquisition module, voltage signal, opens the switch position gathered into module
Confidence number, control algolithm is suppressed by the relay protective scheme computing of relay protection module and the excitation surge current of excitation surge current suppression module
Computing, sends divide-shut brake instruction to module is outputed, breaking-closing operating is performed by outputing module.
Communication module is used for the interaction to external information, and communication module receives the computing knot of master control module by internal bus
Really, self-inspection information, and to deliver to external monitoring system in the communication protocol of standard；Communication module receives external monitoring system
Issue telecommand, and by the telecommand information transmission after parsing to master control module.
Man-machine interaction module externally provides operation and display interface, including touch-screen, signal lamp, involution button.
Excitation surge current suppression control algolithm computing specifically includes following steps, and (excitation surge current suppresses control algolithm computing
A kind of adaptive excitation surge current suppressing method that the present invention is provided)：
The switch separating brake situation of master control module record includes switch remote control separating brake, switched because being tested before fault trip and combined floodgate
Demagnetization, and specific control strategy is performed according to switch separating brake situation, specific control strategy includes：
(a) when switching remote control separating brake, optimal switching angle is the phase angle at separating brake moment, control A phases or B phases or C phases
Closing phase angle is identical with separating brake phase angle；
(b) when switch is because of fault trip, estimates Three-Phase Transformer remanent magnetism with reference to the information at separating brake moment, pass through ergodic algorithm
Draw three-phase shove minimum closing phase angle；
(c) through testing during demagnetization before switch closes a floodgate, 90 ° of moment of selection A phases close a floodgate.
The excitation surge current of excitation surge current suppression module suppresses control calculation in the adaptive transformer inrush current suppression apparatus of the present invention
Method computing just refers to a kind of adaptive excitation surge current suppressing method that the present invention is provided.
As shown in figure 3, a kind of adaptive excitation surge current suppressing method, comprises the following steps：
S01, switchs closing time self study：Communication module receives the remote control combined floodgate order of external monitoring system, will
Master control module is sent to after combined floodgate command analysis, when master control module is identified as closing a floodgate first, reclosing command is sent to outputing mould
Part, closing operation is completed by outputing module, is opened and is gathered switch position signal into module and be sent to master control module, master control module is remembered
T the time required to record is issued to position of the switch closure from reclosing command；
S02, switchs separating brake information record：When switch receives remote control separating brake order, or because short circuit occurs for transformer
When failure causes the triggering tripping operation of defencive function module, master control module record switch remote control separating brake or trip protection, master control module
According to AC modules and the analog signalses and switch position signal gathered into module are opened, record switch is from closing when position is changed into point position
Three-phase current, three-phase voltage information；Switch separating brake information record specifically includes following steps：
The position of the switch becomes timesharing triggering recording by closing, and master control module recording voltage and electric current are in switch changed position forward and backward each two
The data of individual cycle, amplitude u of the position of the switch by conjunction variation moment three-phase voltage is calculated through full wave Fourier algorithmfa、ufb、ufcAnd
Phase angle thetafa、θfb、θfc(i.e. separating brake phase angle), the calculating for optimal switching angle provides initial data；
S03, calculates optimal closing phase angle α：According to the separating brake information of step S02 records, calculated and closed next time by master control module
The optimal closing phase angle of lock, specifically includes following steps：
(a) when switch command separating brake, optimal closing phase angle α is the phase angle at separating brake moment, control A phases or B phases or C
The closing phase angle of phase is identical with separating brake phase angle；
Switch remote control separating brake belongs to the symmetrical situation of three-phase residual flux, when manual brake separating or remote control separating brake, belongs to life
Separating brake is made, because the pre- magnetic flux of three-phase and three-phase residual flux are symmetrical, therefore when one in the A phase, B phase, C phase of transformer mutually meets
Pre- magnetic flux is equal with residual flux, then other two-phases also meet accordingly in condition, i.e. A phase, B phase, C phase one mutually meet pre- magnetic flux with
It is identical that the equal processing method of residual flux suppresses processing method with Inrush Current of Transformer；
According to the electromagnetic induction principle of transformer, ignoring logical and excitation resistance pressure drop the situation of stray transformer flux, input
Voltage u (t) and static exciter magnetic flux φ (t) meets following relation：
If u (t)=UmSin (ω t+ σ), then：
Wherein, UmFor input voltage u (t) amplitude, σ is initial phase angle,For rated flux amplitude, N is transformer primary
The side number of turn；
From formula (3.2), 90 ° of magnetic flux delayed phase voltage-phase when transformer is normally run, it is assumed that transformer
Combined floodgate initial phase angle is σ, and the phase angle at separating brake moment is ε, then transformer residual flux φrFor：
Pre- sensing magnetic flux φ (0+) during Transformer Close moment t=0 is：
Make the pre- sensing magnetic flux of closing moment equal with residual flux, you can to control combined floodgate initial phase angle σ and last time separating brake
The phase angle ε at moment is equal；
Therefore, control closing phase angle is identical with a preceding separating brake phase angle, you can eliminates excitation surge current, that is, controls transformer
The closing phase angle of A phases or B phases or C phases is identical with separating brake phase angle.
(b) when switch is because of fault trip, the optimal closing phase angle α that next time closes a floodgate is calculated：
Estimate Three-Phase Transformer remanent magnetism, three-phase remanent magnetism formula is：
U in formulafa、θfaThe respectively amplitude and phase angle of separating brake moment A phase voltages, ufb、θfbRespectively separating brake moment B phases are electric
The amplitude and phase angle of pressure, ufc、θfcThe respectively amplitude and phase angle of separating brake moment C phase voltages；φeFor transformer rated flux, UN
For transformer rated voltage.
φfa、φfb、φfcThe respectively remanent magnetism of transformer A phase, B phase, C phase；
The pre- sensing magnetic flux of estimation switch closing moment transformer, formula is formula (6)：
φa=-φe cosθ
φb=-φecos(θ-120°) (6)
φ c=- φecos(θ+120°)；
Wherein in formula (6), φa、φb、φcFor the pre- sensing magnetic flux for the A phase, B phase, C phase for switching closing moment transformer；
Wherein θ is A phase voltage phase angles, θ ∈ (0 °~360 °).
Calculated by ergodic algorithm and obtain the minimum closing phase angle of excitation surge current, optimal closing phase angle α be excitation surge current most
Small closing phase angle, optimal closing phase angle α is satisfaction between 0 °~360 °
max(|φa-φfa|,|φb-φfb|,|φc-φfc|) minimum closing phase angle.
Because switch belongs to the asymmetric situation of three-phase residual flux because of fault trip, and remanent magnetism is not zero；Due to residual flux
It is asymmetric, it is impossible to meet the pre- magnetic flux of the three-phase condition equal with three-phase residual flux, therefore can not eliminate excitation surge current in theory,
The maximum minimum that suitable closing phase angle ensures that caused three phase excitation is shoved during combined floodgate can only be chosen.For transformer fault
In the case of trip protection situation, can according to calculate the separating brake moment voltage magnitude and phase angular estimation transformer remanent magnetism, lead to
Cross algorithm traversal and find the pre- magnetic flux of closing a floodgate and conflict with residual flux minimum closing phase angle, reach the purpose that limitation is shoved.
(c) through testing demagnetization before switch closes a floodgate, 90 ° of moment of selection A phases close a floodgate.
Before being closed a floodgate due to switch after testing demagnetization, belong to the symmetrical situation of three-phase residual flux, and remanent magnetism is zero, in remanent magnetism
In the case of being zero, closed a floodgate at the time of any one phase voltage amplitude may be selected for maximum, now voltage magnitude is the mutually temporary of maximum
State magnetic flux is zero, and the transient state magnetic flux of other two-phases is 0.866 times of stable state rated flux, while saturation flux has necessarily abundant
Degree, now excitation surge current can suppress in reduced levels.
S04, calculates the voltage phase angle β corresponding to switch combined floodgate triggering moment：
T the time required to the switch recorded according to step S01 closes a floodgate, and the optimal closing phase angle that step S03 is calculated
α, calculates the phase angle beta of combined floodgate triggering moment, to ensure the phase angle phase for switching the phase angle of actual closing moment with being calculated in S03
Together：
T%20 represents to take the remainder to 20, and because a whole wave period is 20ms, t%20 is used to calculate after whole wave period
Surplus；
S05, is closed a floodgate and performs, when communication module receives remote control combined floodgate order, and master control module is sent to after command analysis, when
Master control module is received after reclosing command, the phase angle of monitoring A phase voltages, and compare A phase voltage phase angles and calculated with step S04 in real time
When the combined floodgate triggering phase angle beta gone out is equal, reclosing command is sent to module is outputed (this moment is combined floodgate triggering moment)；
After combined floodgate execution terminates, the master control module monitoring position of the switch, record is required from combined floodgate triggering moment to switch closure
Time, for learning to switch closing time renewal automatically, join to perform switch combined floodgate triggering moment next time and calculating to provide to correct
Number, that is, update t the time required to the switch combined floodgate of step S01 records；
Also include automatic study switch closing time after step S05 to update：Specifically include following steps：
Communication module is sent to master control module after receiving remote control combined floodgate order, command analysis, by master control module according to control
The optimal phase angle of policy selection processed is closed a floodgate, and sends reclosing command to module is outputed, and closing operation, master control are completed by outputing module
The time required to module record is issued to position of the switch closure from reclosing command.Automatic study switch includes device the time required to closing a floodgate
Relay actuation time, operation circuit relay actuation time and breaker trip time etc..
Those skilled in the art can to the present invention be modified or modification design but do not depart from the present invention think of
Think and scope.Therefore, if these modifications and variations of the present invention belong to the claims in the present invention and its equivalent technical scope
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (6)
1. a kind of adaptive transformer inrush current suppression apparatus, it is characterised in that including analog acquisition module, master control module, lead to
Letter module, open into module, output module and man-machine interaction module, the master control module respectively with the analog acquisition module,
Open into module, output module, communication module and be connected, the communication module is connected with the man-machine interaction module；
The analog acquisition module is used to gather alternating voltage, electric current secondary singal, and gathered data is sent into master control mould
Part；
It is described open into module be used to gathering the position of the switch, function pressing plate On-off signal signal, and pass through communication bus and master
Control module and carry out internal data interaction；
The module of outputing is used to receive and dispatch divide-shut brake order, and is interacted by communication bus and master control module progress internal data；
Master control module is used for the processing and logical operation of data, including relay protection module and excitation surge current suppression module, when
When short trouble occurs for transformer, relay protection function module identification failure outputs module and sends trip command backward, and marks
Excitation surge current suppression module is sent to for short trouble tripping operation, the excitation surge current functional module is according to excitation surge current control algolithm
Complete the calculating of optimal closing phase angle；
The master control module receives the electric current gathered by analog acquisition module, voltage signal, opens the switch position gathered into module
Confidence number, control algolithm is suppressed by the relay protective scheme computing of relay protection module and the excitation surge current of excitation surge current suppression module
Computing, sends divide-shut brake instruction to module is outputed, breaking-closing operating is performed by outputing module；
Communication module is used for the interaction to external information, and the communication module receives the computing knot of master control module by internal bus
Really, self-inspection information, and to deliver to external monitoring system in the communication protocol of standard；The communication module receives external monitoring
System issues telecommand, and by the telecommand information transmission after parsing to master control module；
The man-machine interaction module externally provides operation and display interface；
The excitation surge current suppresses control algolithm computing and specifically includes following steps：
The switch separating brake situation of master control module record includes switch remote control separating brake, switch and disappeared because being tested before fault trip and combined floodgate
Magnetic, and specific control strategy is performed according to the switch separating brake situation, the specific control strategy includes：
(a) when switching remote control separating brake, optimal switching angle is the combined floodgate of the phase angle at separating brake moment, control A phases or B phases or C phases
Phase angle is identical with separating brake phase angle；
(b) switch because of fault trip when, calculating transformer three-phase remanent magnetism, by ergodic algorithm draw three-phase shove minimum combined floodgate
Phase angle；
(c) through testing during demagnetization before switch closes a floodgate, 90 ° of moment of selection A phases close a floodgate.
2. a kind of adaptive transformer inrush current suppression apparatus according to claim 1, it is characterised in that the communication bus
For spi bus.
3. a kind of adaptive transformer inrush current suppression apparatus according to claim 1, it is characterised in that
The man-machine interaction module includes touch-screen, signal lamp, involution button.
4. a kind of adaptive excitation surge current suppressing method, it is characterised in that based on described in any one of claims 1 to 3 from
The transformer inrush current suppression apparatus of adaptation, carries out adaptive excitation surge current and suppresses, specifically include following steps：
S01, switchs closing time self study：Communication module receives the remote control combined floodgate order of external monitoring system, will close a floodgate
Master control module is sent to after command analysis, when master control module is identified as closing a floodgate first, reclosing command is sent to outputing module, by
Output module and complete closing operation, open and gather switch position signal into module and be sent to master control module, the master control module is remembered
T the time required to record is issued to position of the switch closure from reclosing command；
S02, switchs separating brake information record：When switch receives remote control separating brake order, or because short trouble occurs for transformer
When causing the triggering tripping operation of defencive function module, master control module record switch remote control separating brake or trip protection event, master control module
According to AC modules and the analog signalses and switch position signal gathered into module are opened, record switch is from closing when position is changed into point position
Three-phase current, three-phase voltage information；
S03, calculates optimal closing phase angle α：According to the separating brake information of step S02 records, calculate what next time closed a floodgate by master control module
Optimal closing phase angle, specifically includes following steps：
(a) when switching remote control separating brake, optimal closing phase angle α is the phase angle at the separating brake moment, control A phases or B phases or C
The closing phase angle of phase is identical with separating brake phase angle；
(b) when switch is because of fault trip, the optimal closing phase angle α closed a floodgate next time is calculated：
Estimate Three-Phase Transformer remanent magnetism, the three-phase remanent magnetism formula is：
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In formula：
U in formulafa、θfaThe respectively amplitude and phase angle of separating brake moment A phase voltages, ufb、θfbRespectively separating brake moment B phase voltages
Amplitude and phase angle, ufc、θfcThe respectively amplitude and phase angle of separating brake moment C phase voltages；φeFor transformer rated flux, UNTo become
Depressor rated voltage；
φfa、φfb、φfcThe respectively remanent magnetism of transformer A phase, B phase, C phase；
Estimation switchs the pre- sensing magnetic flux of closing moment transformer, and formula is：
φa=-φecosθ
φb=-φecos(θ-120°)
φ c=- φecos(θ+120°)
Wherein, θ is A phase voltage phase angles, θ ∈ (0 °~360 °), φa、φb、φcTo switch A phases, the B of closing moment transformer
The pre- sensing magnetic flux of phase, C phases；
Calculated by ergodic algorithm and obtain the minimum closing phase angle of excitation surge current, the minimum closing phase angle of excitation surge current for it is described most
Good closing phase angle α, the optimal closing phase angle α are satisfaction between 0 °~360 °
max(|φa-φfa|,|φb-φfb|,|φc-φfc|) minimum phase angle；
(c) through testing demagnetization before switch closes a floodgate, selection A phases or 90 ° of moment of B phases or C phases close a floodgate；
S04, calculates the voltage phase angle β corresponding to switch combined floodgate triggering moment：
T the time required to the switch recorded according to step S01 closes a floodgate, and the optimal closing phase angle α that step S03 is calculated, meter
The phase angle beta of combined floodgate triggering moment is calculated, realizes that the phase angle of the actual closing moment of switch is identical with the phase angle calculated in S03：
S05, is closed a floodgate and performs, when communication module receives remote control combined floodgate order, and master control mould is sent to after remote control combined floodgate command analysis
Part, after master control module receives reclosing command, the phase angle of monitoring A phase voltages, and compare A phase voltage phase angles and step S04 in real time
When the combined floodgate triggering phase angle beta calculated is equal, reclosing command is sent to module is outputed.
5. a kind of adaptive excitation surge current suppressing method according to claim 4, it is characterised in that the step S01
Switch separating brake information record specifically includes following steps：
The position of the switch becomes timesharing triggering recording by closing, and master control module recording voltage and electric current are in switch changed position forward and backward each two week
The data of ripple, amplitude u of the position of the switch by conjunction variation moment three-phase voltage is calculated through full wave Fourier algorithmfa、ufb、ufcAnd phase angle
θfa、θfb、θfc, the calculating for optimal switching angle provides initial data.
6. a kind of adaptive excitation surge current suppressing method according to claim 4, it is characterised in that the step S05
It is further comprising the steps of afterwards, the master control module monitoring position of the switch, the time required to record is from combined floodgate triggering moment to switch closure, from
The dynamic switch closing time that learns is updated, and corrected parameter is provided to perform switch combined floodgate triggering moment calculating next time；
The automatic study switch closing time updates：Specifically include following steps：
Communication module is sent to master control module after receiving remote control combined floodgate order, command analysis, by master control module according to control plan
Slightly select optimal phase angle to close a floodgate, and send reclosing command to module is outputed, closing operation, the master control are completed by outputing module
The time required to module record is issued to position of the switch closure from reclosing command.
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| CN201410568437.5A CN104362920B (en) | 2014-10-22 | 2014-10-22 | A kind of adaptive transformer inrush current suppression apparatus and method |
| PCT/CN2014/091989 WO2016061866A1 (en) | 2014-10-22 | 2014-11-24 | Adaptive magnetizing inrush current restraining device and method |
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| CN201410568437.5A CN104362920B (en) | 2014-10-22 | 2014-10-22 | A kind of adaptive transformer inrush current suppression apparatus and method |
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| CN106300341A (en) * | 2016-08-30 | 2017-01-04 | 中国神华能源股份有限公司 | A kind of method and apparatus controlling spare transformer switching |
| CN107910157B (en) * | 2017-11-30 | 2023-12-15 | 国家电网公司 | Universal intelligent main transformer demagnetizing instrument |
| CN109038491B (en) * | 2018-07-05 | 2020-04-17 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Large power transformer magnetizing inrush current suppression method |
| CN109245047B (en) * | 2018-10-23 | 2024-03-08 | 国家电网公司 | 110kV transformer excitation surge suppression device and suppression method |
| CN112531625B (en) * | 2019-09-18 | 2023-04-18 | 西安许继电力电子技术有限公司 | Control protection system of alternating current excitation device |
| CN110993251B (en) * | 2019-11-06 | 2022-12-13 | 中国电力科学研究院有限公司 | Phase selection and switching-off based transformer core demagnetization method and system |
| CN111178395B (en) * | 2019-12-12 | 2023-04-07 | 平高集团有限公司 | Isolation switch state identification method and device |
| CN112009312B (en) * | 2020-07-08 | 2022-03-11 | 中车株洲电力机车研究所有限公司 | Method and equipment for restraining magnetizing inrush current of traction transformer by ground passing through neutral section |
| CN112051525A (en) * | 2020-07-10 | 2020-12-08 | 国家电网有限公司 | Transformer demagnetization analyzer and demagnetization analysis method |
| CN112564039B (en) * | 2020-11-25 | 2023-05-12 | 国能神福(石狮)发电有限公司 | Adaptive transformer inrush current suppression method |
| CN112763801B (en) * | 2021-04-07 | 2021-08-06 | 国网江西省电力有限公司电力科学研究院 | Method for measuring maximum switching phase angle of phase selection switching-on device of extra-high voltage converter station |
| CN113452140B (en) * | 2021-05-31 | 2023-03-28 | 国网新源控股有限公司 | Generator motor outlet open circuit control device and control method |
| CN113708334B (en) * | 2021-07-29 | 2024-05-31 | 南京国电南自维美德自动化有限公司 | Method and system for realizing automatic setting of fixed value of excitation surge suppression device |
| CN113889972B (en) * | 2021-09-18 | 2022-08-02 | 华中科技大学 | Method and device for inhibiting no-load closing excitation inrush current of three-phase transformer |
| CN113991606B (en) * | 2021-10-18 | 2024-01-02 | 国电南瑞科技股份有限公司 | Excitation surge current misoperation prevention method and device for transformer |
| CN114518531A (en) * | 2022-02-21 | 2022-05-20 | 广东电网有限责任公司广州供电局 | High-voltage switch three-phase different-phase diagnosis and early warning method, system and medium based on fault recording |
| EP4297216A1 (en) * | 2022-06-23 | 2023-12-27 | Abb Schweiz Ag | Reducing transformer inrush current |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700550A (en) * | 2005-04-27 | 2005-11-23 | 叶念国 | Method for suppressing power transformer excitation surge current and suppressor |
Family Cites Families (6)
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| CN101075498B (en) * | 2007-04-13 | 2011-05-25 | 中国南车集团株洲电力机车研究所 | Method and device for inhibiting transformer no-load switch-on surge |
| JP5343118B2 (en) * | 2011-12-07 | 2013-11-13 | 株式会社興電舎 | Excitation current suppression device |
| JP6099896B2 (en) * | 2012-07-19 | 2017-03-22 | 株式会社東芝 | Exciting inrush current suppressing device and its suppressing method |
| JP6054163B2 (en) * | 2012-12-14 | 2016-12-27 | 株式会社東芝 | Excitation current suppression system |
| CN103701110B (en) * | 2014-01-10 | 2016-05-11 | 国家电网公司 | A kind of excitation surge current inhibition method based on AC erasing method |
| CN103986385B (en) * | 2014-05-21 | 2017-02-15 | 西安交通大学 | Method for restraining no-load closing magnetizing inrush current of transformer |
-
2014
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