CN107579510A - A kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system - Google Patents
A kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system Download PDFInfo
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- CN107579510A CN107579510A CN201711011365.4A CN201711011365A CN107579510A CN 107579510 A CN107579510 A CN 107579510A CN 201711011365 A CN201711011365 A CN 201711011365A CN 107579510 A CN107579510 A CN 107579510A
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Abstract
The invention discloses a kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system.This method and system have the function of suppressing mobile transformer excitation surge current.Its structure includes control loop and main circuit two parts, and control loop includes controller, voltage sensor, current sensor etc.；Main circuit includes solid circuit breaker, mechanical chopper etc..The present invention suppresses train-installed transformer excitation flow using phase selection control strategy, i.e., in combination circuit breaker separating brake moment, according to magnetic flux and mutual relation of electric voltage calculating remanent magnetism and records；In moment of closing a floodgate next time, breaker closing phase angle is calculated by remanent magnetism and its attenuation coefficient, its calculating principle is the stable state magnetic flux and transformer remanent magnetism zero deflection for making combined floodgate moment, so as to reach the purpose for suppressing excitation surge current.The present invention also proposes a kind of new circuit breaker system topology, increases solid circuit breaker module in main circuit, had both improved response speed and in turn ensure that the pressure-resistant flow-resistant capacity of circuit breaker system.
Description
Technical field
The present invention relates to a kind of breaker control system and implementation for having and suppressing excitation surge current function, belong to open circuit
Device technical field.
Background technology
Breaker is widely used in train and led as a kind of switching device that can be closed circuit, carry dash current
Draw in driving control system.
Train Stopping needs to complete circuit shut-off operation using breaker in undue phase front moment, works as breaker open operation
When, electric arc is produced today because voltage makes air ionization become conductor more than the tolerance of air.Electric arc can typically bypass insulation
Body produces along insulator surface, thus can make insulator thawing or fragmentation to insulator generation damage, such as the high temperature of electric arc, enters
And the person, the security of the lives and property are caused damage.
When launch train or cross split-phase after moment need using breaker complete closing of circuit operation, when breaker close
During lock, due to the voltage change that transformer primary side is unexpected, tractive transformer can be caused supersaturated, and then produce very big excitation
Shove, it is more than five times of rated current that excitation surge current, which is typically of size of, and very impact, Jin Eryin can be produced to bullet train
Relay misoperation is played to make.
The present invention proposes a kind of train car on the basis of further investigation electric arc and excitation surge current producing cause and harm
Transformer excitation flow suppressing method and combination circuit breaker system are carried, by more ripe PLL PHASE-LOCKED LOOP PLL TECHNIQUEs, solid-state open circuit
The technologies such as device, the impact of electric arc, excitation surge current to traction drive is eliminated, prevents protective relay from malfunctioning.In shut-off electricity
Lu Shi, first by PLL phase-locked loop circuits locking contact net fundamental current phase, the breaking circuit when current zero-crossing point, so
Phenomenon of arc discharge can effectively be eliminated.In closed circuit, contact net fundamental voltage phase is locked by PLL phase-locked loop circuits first
Position, then determines closing moment according to the switching-on phase angle of systemic presupposition, and the selection standard at switching-on phase angle is to ensure that combined floodgate is inclined
Magnetic is zero, to suppress mobile transformer saturation.The invention can effectively eliminate arcing and tractive transformer excitation surge current, reduce relay
Device malfunctions, and reduces the harm of excitation surge current.
The content of the invention
The problem of existing for prior art, it is an object of the invention to provide a kind of train-installed static exciter
Surge suppression method and combination circuit breaker system, its is simple in construction, can reach suppress train-installed transformer starting or
The purpose of split-phase moment excitation surge current is crossed, reduces the impact to traction drive.
To achieve the above object, the present invention proposes a kind of train-installed transformer excitation flow suppressing method and combination open circuit
Device system, its structure composition include two large divisions：Main circuit and control loop two parts, main circuit include solid circuit breaker mould
Block, mechanical chopper etc.；Control circuit includes controller, voltage sensor, current sensor etc..
A kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system proposed by the invention, open circuit
Device switching-on phase angle control method is as follows：
The present invention suppresses on-board traction transformer excitation surge current using phase selection control strategy.Specific tuning process is such as
Under：
If control process major parameter is as follows：
It is α that breaker, which opens a sluice gate phase angle,；
Breaker switching-on phase angle beta again；
Remanent magnetism Φres；
Magnetic bias Φp；
Stable state magnetic flux Φs；
Remanent magnetism attenuation coefficient k1；
Whole control process can be divided into two steps：Step 1：The calculation of residual flux process after breaker disconnects；Step
Two：Switching-on phase angle tuning process when closing a floodgate again.
Step 1：Calculation of residual flux process
The breaker disconnection moment opens a sluice gate phase angle [alpha] and instantaneous voltage u1Relation be
Remanent magnetism Φ after breaker disconnectionresFor
Wherein, k1For remanent magnetism attenuation coefficient, k1Change with conditions such as the temperature in transformer local environment, humidity, its numerical value
Adjusted, excursion 0-1. according to switching interval length
Step 2：Switching angle tuning process
Breaker closes the stable state magnetic flux Φ of moment againsIt is with switching-on phase angle beta
Consider that magnetic flux is unable to transition
Φres=Φp+Φs (4)
By Φres、ΦsFormula (5) can be obtained by substituting into equation (4)
In order that mobile transformer is unsaturated, it is necessary to magnetic bias of closing a floodgate is zero, namely as shown in formula (6)
Φp=0 (6)
According to formula (6), can obtain breaker closing phase angle needs to meet：
β=arccos (k1 cosα) (7)
A kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system proposed by the invention, specifically
Implementation process includes following two stages：Stage one：It's split-phase startup stage pasts train；Stage two：Train crosses split-phase ending phase
Stage,.Specific operation process is as follows：
Stage one：It's split-phase startup stage pasts train
After EMUs received split-phase enabling signal, breaker switching action process is as follows：
The first step：After system received split-phase enabling signal, first by adjusting current transformer excision load；
Second step：Then confirm that load closes solid circuit breaker after being removed；
3rd step：Mechanical chopper, mechanical chopper are disconnected on the premise of solid circuit breaker module closure completely is ensured
Because mechanical chopper both end voltage is always zero during disconnection, so mechanical chopper disconnection process is not in draw
Arc discharge phenomenon；
4th step：Solid circuit breaker, same time control are disconnected when current phase detection module detects current phase zero crossing
Device processed record solid circuit breaker disconnects the phase α of moment voltage waveform to calculate mobile transformer remanent magnetism Φres。
Stage two：It's the split-phase ending phase stage pasts train
After EMUs received split-phase end signal, breaker switching action process is as follows：
The first step：After split-phase end signal was received, in the voltage waveform phase that voltage transformer detects with being
Default combined floodgate initial phase angle of uniting mutually is closed at solid circuit breaker module, preset combined floodgate initial phase angle according to tractive transformer remanent magnetism with
Magnetic bias principle of complementarity is adjusted, and combined floodgate magnetic bias and remanent magnetism are just complementary when making to close a floodgate by the default combined floodgate initial phase angle after adjusting；
Second step：Mechanical chopper is closed after it is determined that solid circuit breaker closes completely, in mechanical chopper closure
During because mechanical chopper both end voltage is zero, mechanical chopper is not in phenomenon of arc discharge in closing course；
3rd step：Solid circuit breaker is disconnected after it is determined that mechanical chopper closes completely；
4th step：Regulation current transformer operates traction electric machine after solid circuit breaker is fully disconnected, the vehicle-mounted change of EMUs
Depressor starts run with load.
Embodiment
A kind of train-installed transformer excitation flow suppressing method of the present invention and combination circuit breaker are provided below in conjunction with the accompanying drawings
The embodiment of system, but the implementation of the present invention is not limited to following embodiment.
Fig. 1 is a kind of train-installed transformer excitation flow suppressing method provided by the invention and combination circuit breaker system
System construction drawing, its structure composition include two large divisions：Main circuit and control loop two parts, main circuit include solid circuit breaker
Module, mechanical chopper etc.；Control circuit includes controller, voltage sensor, current sensor etc..
A kind of Fig. 2 train-installed transformer excitation flow suppressing methods provided by the invention and combination circuit breaker system phase selection
Shutting-brake control policing algorithm tuning process schematic diagram.The present invention suppresses on-board traction transformer using phase selection control strategy and encouraged
Magnetic shoves.Specific tuning process is as follows：
If control process major parameter is as follows：
It is α that breaker, which opens a sluice gate phase angle,；
Breaker switching-on phase angle beta again；
Remanent magnetism Φres；
Magnetic bias Φp；
Stable state magnetic flux Φs；
Remanent magnetism attenuation coefficient k1；
Whole control process can be divided into two steps：Step 1：The calculation of residual flux process after breaker disconnects；Step
Two：Switching-on phase angle tuning process when closing a floodgate again.
Step 1：Calculation of residual flux process
The breaker disconnection moment opens a sluice gate phase angle [alpha] and instantaneous voltage u1Relation be
Remanent magnetism Φ after breaker disconnectionresFor
Wherein, k1For remanent magnetism attenuation coefficient, k1Change with conditions such as the temperature in transformer local environment, humidity, its numerical value
Adjusted, excursion 0-1. according to switching interval length
Step 2：Switching angle tuning process
Breaker closes the stable state magnetic flux Φ of moment againsIt is with switching-on phase angle beta
Consider that magnetic flux is unable to transition
Φres=Φp+Φs (4)
By Φres、ΦsFormula (5) can be obtained by substituting into equation (4)
In order that mobile transformer is unsaturated, it is necessary to magnetic bias of closing a floodgate is zero, namely as shown in formula (6)
Φp=0 (6)
According to formula (6), can obtain breaker closing phase angle needs to meet：
β=arccos (k1 cosα) (7)
So to ensure mobile transformer without excitation surge current, it is necessary to which switching-on phase angle meets：β=arccos (k1 cosα)。
Fig. 3 is a kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system proposed by the invention
Middle train crosses split-phase start-up course combination circuit breaker folding timing diagram, and Fig. 4 is a kind of train-installed transformation proposed by the invention
Train crosses split-phase terminal procedure combination circuit breaker folding timing diagram in device excitation surge current suppressing method and combination circuit breaker system.This
A kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system proposed is invented, following two can be divided into
The individual stage：Stage one：It's split-phase startup stage pasts train；Stage two：It's the split-phase ending phase stage pasts train.
Stage one：It's split-phase startup stage pasts train
It is as shown in Figure 3 in the timing diagram of this process combination circuit breaker moving process.EMUs received phase-splitting starting letter
After number, combination circuit breaker switching action process is as follows：
The first step：When system is in t0After reception arrived split-phase enabling signal, first in T0Become in period by adjusting
Flow device excision load；
Second step：Then confirm that load is removed after t1Moment closes solid circuit breaker；
3rd step：In t on the premise of solid circuit breaker module closure completely is ensured2Moment disconnects mechanical chopper, machine
Tool breaker during disconnection because mechanical chopper both end voltage is always zero, so mechanical chopper disconnection process is not
Arcing electric discharge phenomena occur；
4th step：When current phase detection module detects current phase zero crossing in t3Moment disconnects solid-state open circuit
Device, while controller record solid circuit breaker disconnects the phase α of moment voltage waveform calculating mobile transformer remanent magnetism Φres。
Stage two：Train crosses split-phase ending phase
The timing diagram of this process combination circuit breaker moving process is as shown in Figure 4.EMUs received split-phase end signal
Afterwards, breaker switching action process is as follows：
The first step：When system is in t4After reception arrived split-phase end signal, in the voltage that voltage transformer detects
Waveform phase and the combined floodgate initial phase angle of systemic presupposition are mutually closed at solid circuit breaker module, and now the moment is t5。
Second step：When it is determined that solid circuit breaker completely closure after closure mechanical chopper, now the moment be calculated as t6, in machine
Because mechanical chopper both end voltage is zero during tool breaker closing, mechanical chopper is not in draw in closing course
Arc phenomenon；
3rd step：Solid circuit breaker is disconnected after it is determined that mechanical chopper closes completely, now the moment is t7；
4th step：Regulation current transformer operates traction electric machine after solid circuit breaker is fully disconnected, the vehicle-mounted change of EMUs
Depressor starts run with load.
Brief description of the drawings
Fig. 1：:Combination circuit breaker system structure chart
Fig. 2：Phase selection control strategy algorithm adjusts schematic diagram
Fig. 3：Open a sluice gate process breaker operator timing diagram
Fig. 4：Making process breaker operator timing diagram.
Claims (5)
1. a kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system, it is characterised in that：A kind of train
Mobile transformer excitation surge current suppressing method：The present invention suppresses on-board traction transformer excitation using phase selection control strategy and gushed
Stream；The specific control process of phase selection control strategy shutting-brake control strategy is as follows：
If control process major parameter is as follows：
It is α that breaker, which opens a sluice gate phase angle,；
Breaker switching-on phase angle beta again；
Remanent magnetism Φres；
Magnetic bias Φb；
Stable state magnetic flux Φs；
Remanent magnetism attenuation coefficient k1；
Whole control process can be divided into two steps：Step 1：Calculation of residual flux process after breaker disconnection；Step 2：Again
Switching-on phase angle tuning process during secondary combined floodgate；
Step 1：Calculation of residual flux process
The breaker disconnection moment opens a sluice gate phase angle [alpha] and instantaneous voltage u1Relation be
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Wherein, k1For remanent magnetism attenuation coefficient, k1Next conjunction is arrived with the temperature in transformer local environment, humidity and after opening a sluice gate
The conditions such as the time interval of lock point change, and its numerical value is adjusted, excursion 0-1 according to switching interval length；
N1For the mobile transformer primary side number of turn；ω is tractive power supply system contact net angular frequency；
Step 2：Switching angle tuning process
Breaker closes the stable state magnetic flux Φ of moment againsRelation with switching-on phase angle beta is
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Consider that magnetic flux is unable to transition, moment of closing a floodgate meets formula (4)
Φres=Φb+Φs (4)
By Φres、ΦsFormula (5) can be obtained by substituting into equation (4)
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In order that mobile transformer is unsaturated, it is necessary to magnetic bias of closing a floodgate is zero, namely as shown in formula (6)
Φb=0 (6)
According to formula (6), can obtain breaker closing phase angle needs to meet formula (7)：
β=arccos (k1cosα) (7)
So when switching-on phase angle is adjusted as β=arccos (k1Cos α) when can effectively suppress train and cross split-phase stage vehicle-mounted variable pressure
Device device excitation surge current.
2. a kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system, it is characterised in that：It is a kind of new
Combination circuit breaker system：The system is provided with control loop and main circuit two parts；Control loop includes controller, mutual induction of voltage
Device, current transformer etc.；Voltage transformer, current transformer are respectively used for measuring the voltage of breaker and pantograph link position
(referring to neutral point), electric current；Main circuit includes solid circuit breaker, mechanical chopper etc., and mechanical chopper is breaking with solid-state first
Device is in parallel, is then series between pantograph and tractive transformer.
3. a kind of train-installed transformer excitation flow suppressing method and combination circuit breaker system, it is characterised in that：Combination open circuit
Device system moving process includes two stages：Stage one：It's split-phase startup stage pasts train；Stage two：Train crosses split-phase and terminates rank
The section stage；Comprise the following steps that：
Stage one：It's split-phase startup stage pasts train
After EMUs received split-phase enabling signal, breaker switching action process is as follows：
The first step：After system received split-phase enabling signal, first by adjusting current transformer excision load；
Second step：Then confirm that load closes solid circuit breaker after being removed；
3rd step：Mechanical chopper is disconnected on the premise of solid circuit breaker module closure completely is ensured, mechanical chopper is disconnected
Because mechanical chopper both end voltage is always zero during opening, put so mechanical chopper disconnection process is not in arcing
Electrical phenomena；
4th step：Solid circuit breaker, while controller are disconnected when current phase detection module detects current phase zero crossing
Record solid circuit breaker disconnects the phase α of moment voltage waveform calculating mobile transformer remanent magnetism Φres；
Stage two：It's the split-phase ending phase stage pasts train
After EMUs received split-phase end signal, breaker switching action process is as follows：
The first step：After split-phase end signal was received, the voltage waveform phase and system detected in voltage transformer is pre-
If combined floodgate initial phase angle be mutually closed at solid circuit breaker module, preset combined floodgate initial phase angle according to tractive transformer remanent magnetism and magnetic bias
Principle of complementarity is adjusted, and combined floodgate magnetic bias and remanent magnetism are just complementary when making to close a floodgate by the default combined floodgate initial phase angle after adjusting；
Second step：Mechanical chopper is closed after it is determined that solid circuit breaker closes completely, in the process of mechanical chopper closure
In because mechanical chopper both end voltage is zero, mechanical chopper is not in phenomenon of arc discharge in closing course；
3rd step：Solid circuit breaker is disconnected after it is determined that mechanical chopper closes completely；
4th step：Regulation current transformer operates traction electric machine after solid circuit breaker is fully disconnected, EMUs mobile transformer
Start run with load.
4. a kind of train-installed transformer excitation flow suppressing method according to claim 3 and combination circuit breaker system,
It is characterized in that：After EMUs received split-phase enabling signal, breaker switching action process is as follows：
The first step：After system received split-phase enabling signal, first by adjusting current transformer excision load；
Second step：Then confirm that load closes solid circuit breaker after being removed；
3rd step：Mechanical chopper is disconnected on the premise of solid circuit breaker module closure completely is ensured, mechanical chopper is disconnected
Because mechanical chopper both end voltage is always zero during opening, put so mechanical chopper disconnection process is not in arcing
Electrical phenomena；
4th step：Solid circuit breaker, while controller are disconnected when current phase detection module detects current phase zero crossing
Record solid circuit breaker disconnects the phase α of moment voltage waveform calculating mobile transformer remanent magnetism Φres。
5. a kind of train-installed transformer excitation flow suppressing method according to claim 3 and combination circuit breaker system,
It is characterized in that：After EMUs received split-phase end signal, breaker switching action process is as follows：
The first step：After split-phase end signal was received, the voltage waveform phase and system detected in voltage transformer is pre-
If combined floodgate initial phase angle be mutually closed at solid circuit breaker module, preset combined floodgate initial phase angle according to tractive transformer remanent magnetism and magnetic bias
Principle of complementarity is adjusted, and combined floodgate magnetic bias and remanent magnetism are just complementary when making to close a floodgate by the default combined floodgate initial phase angle after adjusting；
Second step：Mechanical chopper is closed after it is determined that solid circuit breaker closes completely, in the process of mechanical chopper closure
In because mechanical chopper both end voltage is zero, mechanical chopper is not in phenomenon of arc discharge in closing course；
3rd step：Solid circuit breaker is disconnected after it is determined that mechanical chopper closes completely；
4th step：Regulation current transformer operates traction electric machine after solid circuit breaker is fully disconnected, EMUs mobile transformer
Start run with load.
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| CN111600295B (en) * | 2019-08-09 | 2023-08-08 | 青岛鼎信通讯股份有限公司 | Power frequency transformer excitation surge suppression strategy applied to controllable inversion |
| CN110768223A (en) * | 2019-11-26 | 2020-02-07 | 珠海万力达电气自动化有限公司 | Control method for weakening bus inrush current of railway purification power supply device |
| CN110907742A (en) * | 2019-12-20 | 2020-03-24 | 福开尔（西安）电气有限公司 | Device for inhibiting excitation surge current of locomotive and method for monitoring surge current and overvoltage |
| WO2022007158A1 (en) * | 2020-07-08 | 2022-01-13 | 中车株洲电力机车研究所有限公司 | Method and device for ground over-phase suppression of magnetizing inrush current of traction transformer |
| CN112865178A (en) * | 2021-01-25 | 2021-05-28 | 阳光电源股份有限公司 | Double-fed wind power generation system, double-fed converter and machine side shutdown control method thereof |
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