CN109149538A - A kind of Traction networks excitation surge current inhibition system based on virtual centrifugal switch - Google Patents
A kind of Traction networks excitation surge current inhibition system based on virtual centrifugal switch Download PDFInfo
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- CN109149538A CN109149538A CN201811123236.9A CN201811123236A CN109149538A CN 109149538 A CN109149538 A CN 109149538A CN 201811123236 A CN201811123236 A CN 201811123236A CN 109149538 A CN109149538 A CN 109149538A
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- China
- Prior art keywords
- excitation surge
- centrifugal switch
- surge current
- virtual
- current
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
- H02H9/002—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off limiting inrush current on switching on of inductive loads subjected to remanence, e.g. transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Transformers (AREA)
Abstract
The present invention provides a kind of, and the excitation surge current based on virtual centrifugal switch inhibits system, and the system comprises detection terminal, control system and magnetizing inrush current suppression device；The detection terminal is set to transformer outlet side, is connected in Traction networks feeder line；The detection terminal identifies tractive transformer outlet side current waveform by algorithm, and the data obtained is sent to the control system.The control system is made of data processing module and virtual centrifugal switch device；The data processing module judges that excitation surge current starts the time with end and action signal is sent to virtual centrifugal switch device by analyzing the data obtained；The virtual centrifugal switch device carries out cut-offfing the access that control inhibits device.The magnetizing inrush current suppression device is made of the non-essential resistance for being serially connected in transformer primary side.Technical solution provided by the invention is simple and reliable, can eliminate influence of the excitation surge current to Traction networks transformer safety stable operation.
Description
Technical field
The present invention relates to a kind of excitation surge currents to inhibit system, and specially a kind of tractive transformer excitation surge current inhibits system.
Background technique
Mobile transformer is equipment important in tractive power supply system, and whether it is directly related to safely the steady of whole system
It is fixed.When electric locomotive passes through sectional, locomotive transformer will carry out power-off and power on operation, since electric locomotive transformer is band
Load is cut-off, and there are residual voltage, residual voltage and the frequencies, phase, amplitude of the system voltage of phase to be put into all may be used for the transformer after power-off
Can be different, in addition the effect of transformer remanent magnetism, in powered on moment, there may be very big to shove.Document is described in detail excitation and gushes
Producing reason is flowed, mainly as caused by transformer core saturation, influences many because being known as of its, such as source impedance closes
Lock angle and remanent magnetism size etc..Excitation surge current contains the slow DC component of multinomial decaying and harmonic wave abundant, peak value can
Up to 6~30 times of rated current, can have an adverse effect to Traction networks.When excitation surge current numerical value is excessive, protective device will cause
Malfunction, make transformer occur mistrip, electrical equipment can be damaged when serious, causes the collapse of tractive power supply system, brings peace
Full hidden danger and economic loss.Inhibit excitation surge current that can prevent reclosing from failing to avoid its bring risk, weakens to Traction networks
Impact and pollution, it is great to the Protection significance of transformer.Therefore, excitation surge current is inhibited to become one of hot spot concerned by people.
In recent years, many scholars at home and abroad have carried out the largely analysis about excitation surge current mechanism of production, on this basis,
New principle, the new method for inhibition excitation surge current are proposed, and achieves many achievements.It is big that two can be generally divided into
Class: one kind is by analyzing transformer core excitation principle, and then to change inside transformer structure using internal control to cut down
Excitation surge current, wherein the method for changing winding distribution changes structure of the winding distribution because changing transformer, it can be exhausted to winding
Edge has certain influence, and it is lower to change its feasibility that puts in order merely for the purpose for limiting excitation surge current.Another kind of is using outer
Portion's control, in Transformer Close, takes some remedial measures to cut down excitation surge current when combined floodgate, phase selection switch technology passes through
Individual-phase control is carried out to the branch wire time of breaker, magnetic flux is avoided to be saturated, inhibits generation of shoving, but the technology needs to consider to remain
The influence of magnetic, since the direction of remanent magnetism and size are difficult Accurate Determining, there is certain difficulties in reality, need to be into one
Step is improved.In the method for step down side shunt capacitance by increasing excitation surge current current by pass, inhibit electric current, but at every
All shunt capacitance heavy workload on locomotive, and cost is excessively high, less gears to actual circumstances.The method of primary side series resistance is in transformation
It is the effective means that the inhibition being widely used at present is shoved that switching-on resistance is sealed in device closing circuit, can not only reduce excitation surge current
Peak value, moreover it is possible to so that excitation surge current is decayed quickly, but institute's string resistance partial pressure will cause the loss of system capacity, utilize delay switch
Though the method for carrying out series resistor excision is simple and easy, in order to be directed to different operating conditions, it is only capable of choosing longer time, is not achieved
The quickly purpose of excision series resistor, can still bring influence to a certain extent to system.
Summary of the invention
In view of the above-mentioned problems, to solve technical deficiency at this stage, it is an object of the invention to provide one kind
Tractive transformer excitation surge current inhibits system, can effectively solve the problems, such as tractive transformer excitation surge current, improves safety and stability
Property, and the system does not change tractive transformer structure, technical solution is simple and reliable.
Present invention provide the technical scheme that a kind of excitation surge current based on virtual centrifugal switch inhibits system, the system
System includes detection terminal, control system and magnetizing inrush current suppression device；The detection terminal is set to transformer outlet side, string
It is associated in Traction networks feeder line；The detection terminal identifies tractive transformer outlet side current waveform by algorithm, and incites somebody to action
The data obtained is sent to the control system.The control system is made of data processing module and virtual centrifugal switch device；
The data processing module is by analyzing the data obtained, judging the time that excitation surge current starts and terminates and acting
Signal is sent to virtual centrifugal switch device；The virtual centrifugal switch device carries out cut-offfing the access that control inhibits device.Institute
Magnetizing inrush current suppression device is stated to be made of the non-essential resistance for being serially connected in transformer primary side.
Preferably, the detection terminal is made of 101 current transformers and 102 detection algorithm platforms；Wherein, 101 electricity
Current transformer is serially connected on Traction networks feeder line, and real-time monitoring feeder current has the characteristics that separated by direct communication；102 detection algorithms are flat
The collected data of mutual inductor handle and the data obtained are sent to control system by platform by algorithm.
Preferably, the control system is made of 201 data processing modules and 202 virtual centrifugal switch devices；Wherein,
201 data processing modules compare the data obtained and threshold value set by inside, to judge the beginning and end of excitation surge current, and
Send control signal.
Further, described 202 virtual centrifugal switch devices are attempted by 30 magnetizing inrush current suppression device two sides；202 virtually from
Heart switching device by cut-off to 30 magnetizing inrush current suppression device carry out access with cut off operation.
Preferably, 30 excitation surge current inhibits system to be made of 301 non-essential resistances；Wherein, 301 non-essential resistances are serially connected in
Transformer primary side, resistance value are 47 ohm.
Preferably, the detection algorithm is, first the collected current waveform of record current mutual inductor, and constantly in comparison
Lower waveform carries out making quotient respectively and obtains λ as difference to adjacent Wave crest and wave trough absolute value1=| f (b) |/| f (a) |, λ2=| f (b)
|-| f (a) |, wherein ta< tbIf λ1> 2, then it is assumed that excitation surge current occurs；If λ2< ε, then it is assumed that excitation surge current is over,
Wherein ε is set threshold value.
Detailed description of the invention
Fig. 1 is system construction drawing；
Fig. 2 is that locomotive crosses phase separation structure figure；
Fig. 3 is transformer main switch and excitation surge current timing diagram；
Fig. 4 is excitation surge current waveform diagram；
Specific embodiment
For a better understanding of the present invention, below with reference to illustrating that attached drawing is described further the content of present invention.
The system comprises 10 as shown in Figure 1: for the structure of tractive transformer excitation surge current inhibition system provided by the invention
Detect terminal, 20 control systems and 30 magnetizing inrush current suppression device.Wherein, 10 detection terminals are by 101 current transformers and 102
Detection algorithm platform is constituted；20 control systems are made of 201 data processing modules and 202 virtual centrifugal switches；30 excitation surge currents
Device is inhibited to be made of 301 non-essential resistances.
The transformer includes the closed rectangular frame gripping link by the vertical iron core in two sides and upper and lower two horizontal iron and forming
The iron core of shape and the first winding being respectively wound around in the vertical iron core column in two sides and secondary winding composition, the transformer are
Tractive transformer, first winding, the secondary winding of the transformer are coupled by V/X mode.
The detection terminal is connected on tractive transformer exit, detects Traction networks feeder line by 101 current transformers
Contained in excitation surge current waveform, and calculate by 102 detection algorithm platforms the difference of the absolute value of every two adjacent waves spike paddy
Value and quotient, are transported in 201 data processing modules.
201 data processing module carries out threshold value set by the data received from 102 detection algorithm platforms and itself pair
Than judging the time of excitation surge current beginning and end, and send control signals in 202 virtual centrifugal switches.
The 202 virtual centrifugal switch is after receiving 201 control signal, and the operation for being closed and being disconnected is to realize
To the control action of 30 magnetizing inrush current suppression device.
30 magnetizing inrush current suppression device is made of 301 non-essential resistances, is encouraged wherein 301 non-essential resistances are serially connected in transformer
Magnetic shoves primary side, and resistance value is 47 ohm.
Claims (6)
1. a kind of excitation surge current based on virtual centrifugal switch inhibits system, the system comprises detection terminal, control system with
And magnetizing inrush current suppression device；The detection terminal is set to transformer outlet side, is connected in Traction networks feeder line；The detection
Terminal identifies tractive transformer outlet side current waveform by algorithm, and the data obtained is sent to the control and is
System.The control system is made of data processing module and virtual centrifugal switch device；The data processing module passes through to institute
It obtains data to be analyzed, judges that excitation surge current starts to be sent to virtual centrifugal switch dress with the time terminated and by action signal
It sets；The virtual centrifugal switch device carries out cut-offfing the access that control inhibits device.The magnetizing inrush current suppression device is by concatenating
It is constituted in the non-essential resistance of transformer primary side.
2. a kind of excitation surge current based on virtual centrifugal switch according to claim 1 inhibits system, it is characterised in that:
The detection terminal is made of 101 current transformers and 102 detection algorithm platforms；Wherein, 101 current transformers concatenate
On Traction networks feeder line, real-time monitoring feeder current has the characteristics that separated by direct communication；102 detection algorithm platforms will by algorithm
The collected data of mutual inductor handle and the data obtained are sent to control system.
3. a kind of excitation surge current based on virtual centrifugal switch according to claim 1 inhibits system, it is characterised in that:
The control system is made of 201 data processing modules and 202 virtual centrifugal switch devices；Wherein, 201 data processing mould
Block compares the data obtained and threshold value set by inside, to judge the beginning and end of excitation surge current, and sends control signal.
4. a kind of excitation surge current based on virtual centrifugal switch according to claim 3 inhibits system, it is characterised in that:
The 202 virtual centrifugal switch device is attempted by 30 magnetizing inrush current suppression device two sides；202 virtual centrifugal switch devices are logical
It crosses to cut-off and access is carried out to 30 magnetizing inrush current suppression device and cuts off operation.
5. a kind of excitation surge current based on virtual interest switch according to claim 1 inhibits system, it is characterised in that:
30 excitation surge current inhibits system to be made of 301 non-essential resistances；Wherein, it is primary to be serially connected in transformer for 301 non-essential resistances
Side, resistance value are 47 ohm.
6. a kind of excitation surge current based on virtual centrifugal switch according to claim 2 inhibits system, it is characterised in that:
The detection algorithm is the collected current waveform of record current mutual inductor, and waveform constantly above and below comparison first, to phase
Adjacent Wave crest and wave trough absolute value carries out making quotient respectively and obtains λ as difference1=| f (b) |/| f (a) |, λ2=| f (b) |-| f (a) |,
Middle ta< tbIf λ1> 2, then it is assumed that excitation surge current occurs；If λ2< ε, then it is assumed that excitation surge current is over, and wherein ε is set
Threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811123236.9A CN109149538A (en) | 2018-09-26 | 2018-09-26 | A kind of Traction networks excitation surge current inhibition system based on virtual centrifugal switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811123236.9A CN109149538A (en) | 2018-09-26 | 2018-09-26 | A kind of Traction networks excitation surge current inhibition system based on virtual centrifugal switch |
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| Publication Number | Publication Date |
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| CN109149538A true CN109149538A (en) | 2019-01-04 |
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|---|---|---|---|
| CN201811123236.9A Pending CN109149538A (en) | 2018-09-26 | 2018-09-26 | A kind of Traction networks excitation surge current inhibition system based on virtual centrifugal switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-09-26 CN CN201811123236.9A patent/CN109149538A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190104 |
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| WD01 | Invention patent application deemed withdrawn after publication |