CN105870897B - A kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase - Google Patents
A kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase Download PDFInfo
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- CN105870897B CN105870897B CN201610384883.XA CN201610384883A CN105870897B CN 105870897 B CN105870897 B CN 105870897B CN 201610384883 A CN201610384883 A CN 201610384883A CN 105870897 B CN105870897 B CN 105870897B
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- 230000009191 jumping Effects 0.000 title claims abstract description 11
- 230000000452 restraining effect Effects 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract description 2
- 230000004907 flux Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003754 fetus Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H02H7/045—Differential protection of transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Breakers (AREA)
Abstract
The present invention relates to a kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase, it is mainly used in suppressing Transformer Close when charging to transformer after transformer interruption maintenance shoving.Including the zero point detection module, time delay module and combined floodgate drive module being sequentially connected in series.Bus PT A cross streams voltages are through zero crossing detection module, it is changed into the square-wave signal using sine-way zero as starting point, after square-wave signal is by rising edge Time delay module after switch knob, after delay, trigger MOSFET driving switch, turn on closing coil, high voltage side of transformer breaker charges in peak value combined floodgate, the transformer of A phase voltages.Shoved so as to greatly reduce Transformer Close, reaching prevents fixture from loosening, contains the purpose of phenomena such as transformer differential protection.
Description
Technical field
The present invention relates to a kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase, is mainly used in transformer power failure
Suppress Transformer Close when charging to transformer after maintenance to shove.
Background technology
When Transformer Close charges, when primary side combined floodgate moment is exactly voltage zero-cross, due to the magnetic in transformer core
Logical phase falls behind 90 degree of voltage, so now the magnetic flux in iron core is maximum, but magnetic flux can not be mutated, so in iron core
One can be produced and decay fast direct current flux with the time in the opposite direction to offset this maximum, after half period, this
Direct current flux is again identical with exchange flux direction, the two addition, allows for core sataration, will produce very big exiting pour current.
The working specification regulation of power system：After overhaul or it is new on transformer need to close a floodgate by five times and charge, big exciting current
Repeat impact can cause the mechanical force between winding, may gradually make to fix loosening, inrush phenomenon may cause transformation in addition
The differential protection action of device.At present, the device for suppressing inrush phenomenon is mostly disconnected by the accurate control of Power Electronic Circuit of complexity
The closing time of each phase of road device, it is generally used for three-phase separate and jumps breaker.And at present most of transformer station, especially 220kV and with
The lower on high-tension side breaker of main transformer of transformer substation is that three-phase jumps breaker altogether, and former structure is complicated, cost is high, fault rate
It is high；The latter can not suppress inrush phenomenon, easily cause above-mentioned fixing piece loosen, transformer differential protection phenomena such as.
The content of the invention
It is an object of the invention to provide a kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase, reaches reduction and becomes
The purpose of depressor inrush phenomenon.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase of the present invention, including
Zero point detection module, for detecting the zero crossing of sinusoidal voltage, export 50Hz square waves and by under the square wave
Drop edge is used as subsequent conditioning circuit trigger signal；
Time delay module, for adjusting the pulse width of zero point detection module output, it is set to meet the combined floodgate requirement of breaker；
Combined floodgate drive module, for driving breaker to complete feed motion,
The zero point detection module includes being connected to the sinusoidal signal input that bus transformer A phases hold, by photoelectricity coupling
Clutch is connected to the square-wave signal output end of sinusoidal signal input；The input of the time delay module is connected to square wave letter
Number output end, the output end of time delay module are connected to the input of combined floodgate drive module；The combined floodgate drive module is by field-effect
Pipe and its drive circuit are formed.
The time delay module is made up of the integrated circuit 74LS123 and peripheral circuit of thtee-stage shiplock.
The drive circuit of FET is made up of timing circuit and driving module in the combined floodgate drive module, timing circuit
It is made up of integrated circuit NE555N2 and its peripheral circuit, the output of integrated circuit NE555N2 triggering end connection time delay module
End；Integrated circuit NE555N2 output end is connected to the input of driving module, and the driving module uses integrated circuit
M57962, the integrated circuit M57962 input are connected to the output end of timing circuit, integrated circuit M57962 output
End is connected to the grid of FET, and the FET uses MOSFET.
The output end of combined floodgate drive module is provided with breaker；The output end of combined floodgate drive module is provided with pattern choosing
Select switch；The source electrode of FET successively with mode selection switch, five-prevention operation switch, auxiliary contacts of circuit breaker and breaker
After closing coil series connection, the positive pole of working power is connected to；The drain electrode of FET is connected to the negative pole of working power.
The square-wave signal output end of the zero point detection module is in series with inrush current prevention operating handle.
After adopting the above technical scheme, the control to breaker closing phase is realized by the device, by determining voltage
Zero crossing, by certain delays time to control measure so that just in the peak value of A phase voltages when Transformer Close charges, so that greatly
The big Transformer Close that reduces is shoved, and reaching prevents fixture from loosening, contains the purpose of phenomena such as transformer differential protection.
Brief description of the drawings
Fig. 1 is the circuit diagram of the zero point detection module of one embodiment of the invention.
Fig. 2 is the circuit diagram of time delay module.
Fig. 3 is the circuit diagram of combined floodgate drive module.
Fig. 4 is the operation principle timing diagram of one embodiment of the invention.
Embodiment
A kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase of the present invention, including
Zero point detection module, for detecting the zero crossing of sinusoidal voltage, export 50Hz square waves and by under the square wave
Drop edge is used as subsequent conditioning circuit trigger signal；
Time delay module, for adjusting the pulse width of zero point detection module output, it is set to meet the combined floodgate requirement of breaker；
Combined floodgate drive module, for driving breaker to complete feed motion.
The zero point detection module includes being connected to the sinusoidal signal input Vin that bus transformer A phases hold, passes through photoelectricity
Coupler is connected to sinusoidal signal input Vin square-wave signal output end vo；The input of the time delay module is connected to
Square-wave signal output end vo, the output end of time delay module are connected to the input of combined floodgate drive module；The driving mould that closes a floodgate
Block is made up of FET T1 and its drive circuit.
As shown in figure 1, the model NEC2501KK of the core parts photoelectrical coupler of zero point detection module, sinusoidal voltage
Signal input part Vin is derived from the secondary A phase voltages of bus transformer, and resistance R1 takes 7.5M Ω, another resistance R2 to take 220K Ω, work
Voltage vcc takes 12V DC voltage.
Zero point detection is used for the zero crossing for detecting sinusoidal voltage, exports 50Hz square waves, uses the decline of square wave
Along the trigger signal as subsequent conditioning circuit.After inrush current prevention operating handle SB0 is connected, the trailing edge triggering that zero passage detection obtains is believed
Number export to time delay process.
As shown in Fig. 2 the time delay module is made up of the integrated circuit 74LS123 and peripheral circuit of thtee-stage shiplock.This portion
Dividing has three integrated circuit 74LS123 to form, and integrated circuit 74LS123 output pulse widths are by the capacitance resistance of its pin 14 and 16
What value determined.First provides trigger signal by square-wave signal output end vo, and it is respectively 0.1uF to select electric capacity C1 and resistance R3
And 22k, export 50us short pulse duration.This pulsewidth goes to trigger second integrated circuit 74LS123, and the chip chooses electric capacity C2 and is
4.7uF, adjustable resistance R4 can realize that resistance is adjustable by 0-20k Ω, and such output signal is 0-28ms adjustable pulse, uses this
The trailing edge of signal removes a piece of integrated circuit 74LS123 under triggering, it is exported 50us short pulse duration, equally, selects electric capacity C3
It is respectively 0.1uF and 22k with resistance R5.
By adjusting the pulse width of this link, can control that closing coil turns in a sine wave period when
Carve, so that just in the peak value of A phase voltages when Transformer Close charges（Or valley）.This pulse width can be tried by repeatedly closing a floodgate
Test and obtained in the inrush phenomenon minimum of A phases, can also be provided by breaker producer.Subpulse width once it is determined that, then from voltage
The time that zero crossing charges to Transformer Close determines, then transformer close a floodgate every time charging sinusoidal cycles it is same when
Carve.
As shown in figure 3, FET T1 drive circuit is by timing circuit IC1 and driving mould in the combined floodgate drive module
Group IC2 is formed, and timing circuit IC1 is made up of integrated circuit NE555N2 and its peripheral circuit, integrated circuit NE555N2 triggering
Hold the output end of Vin2 connection time delay modules；Integrated circuit NE555N2 output end is connected to driving module IC2 input,
The driving module IC2 uses integrated circuit M57962, and the input of the integrated circuit M57962 is connected to timing circuit IC1
Output end, integrated circuit M57962 output end is connected to FET T1 grid, and the FET T1 is used
MOSFET。
In addition, the output end in combined floodgate drive module is provided with the breaker that is controlled by it；In the defeated of combined floodgate drive module
Go out end and be provided with mode selection switch K；FET T1 source electrode successively with mode selection switch K, five-prevention operation switch SB1,
After the closing coil LC of auxiliary contacts of circuit breaker QF and breaker series connection, the positive pole of working power is connected to；FET（T1）
Drain electrode be connected to the negative pole of working power.
The square-wave signal output end vo of the zero point detection module is in series with inrush current prevention operating handle SB0.
The trailing edge triggering timing IC circuit 1 for the pulse signal that this link is exported with the output end of time delay module namely collects
Into circuit NE555N2, output pulse width 20ms or so high level signal, the drive signal as FET T1.This signal arteries and veins
Width can be controlled by adjustable resistance R6 and electric capacity C4, if the breaker is electromagnetic power formula, this signal pulsewidth should be not less than open circuit
Conduction time when device normally closes a floodgate required for institute's closing coil, to ensure that breaker can normally close a floodgate.Integrated circuit NE555N2
The pulsewidth that pin 3 exports, after triggering FET T1 conductings by integrated circuit M57962 chips, closing coil LC conductings, break
Road device closes a floodgate.By mode selection switch K selectable modes 1 and pattern 2, pattern 1 is put into transformer normal operation, pattern
2 put into when transformer charges.Under pattern 2, after five-prevention operation switch SB1 conductings, then by lower switch SB0, you can allow zero point
The trailing edge Time delay circuit of detection signal, and then trigger FET T1 conductings, closing coil LC conductings, Transformer Close
Charging.
In Fig. 3, capacitor C4 is fixed as 0.2uF, and resistance R6 is 0-20k Ω, can coordinate output 0-70ms pulsewidth.Vcc
It is 47uF for 15V, Vee 10V, capacitor C4 and capacitor C5, auxiliary contacts of circuit breaker QF is automatic after breaker closing
Disconnect.
As shown in figure 4, control principle is as follows：Sinusoidal ac signal L1 is derived from bus transformer secondary side A phase voltages, A phases
Alternating voltage passes through zero-crossing examination module, is changed into the square-wave signal L2 using sine-way zero as starting point, and square-wave signal is led to
Cross after switch knob after rising edge Time delay module, after delay, time delayed signal L4 forms switching signal L3, triggers field-effect
Pipe T1 driving switch, FET T1 conductings, forms closing coil signal L5, then closing coil LC is turned on, high voltage side of transformer
Breaker charges in peak value combined floodgate, the transformer of A phase voltages.Wherein delay time t size should be with the model using breaker
It is engaged.
Claims (4)
1. a kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase, including
Zero point detection module, for detecting the zero crossing of sinusoidal voltage, export 50Hz square waves and by the trailing edge of the square wave
As subsequent conditioning circuit trigger signal；
Time delay module, for adjusting the pulse width of zero point detection module output, it is set to meet the combined floodgate requirement of breaker；
Combined floodgate drive module, for driving breaker to complete feed motion；
It is characterized in that：The zero point detection module includes being connected to the sinusoidal signal input that bus transformer A phases are held
（Vin）, sinusoidal signal input is connected to by photoelectrical coupler（Vin）Square-wave signal output end（Vo）；The delay
The input of module is connected to square-wave signal output end（Vo）, the output end of time delay module is connected to the defeated of combined floodgate drive module
Enter end；The combined floodgate drive module is by FET（T1）And its drive circuit is formed.
A kind of 2. inrush phenomenon restraining device for jumping breaker altogether based on three-phase according to claim 1, it is characterised in that：
The time delay module is made up of the integrated circuit 74LS123 and peripheral circuit of thtee-stage shiplock.
A kind of 3. inrush phenomenon restraining device for jumping breaker altogether based on three-phase according to claim 1, it is characterised in that：
FET in the combined floodgate drive module（T1）Drive circuit by timing circuit（IC1）With driving module（IC2）Form, meter
When circuit（IC1）It is made up of integrated circuit NE555N2 and its peripheral circuit, integrated circuit NE555N2 triggering end（Vin2）Even
Connect the output end of time delay module；Integrated circuit NE555N2 output end is connected to driving module（IC2）Input, the drive
Dynamic model group（IC2）Using integrated circuit M57962, the input of the integrated circuit M57962 is connected to timing circuit（IC1）'s
Output end, integrated circuit M57962 output end are connected to FET（T1）Grid, the FET（T1）Using
MOSFET；The output end of combined floodgate drive module is provided with breaker；The output end of combined floodgate drive module is provided with pattern choosing
Select switch（K）；FET（T1）Source electrode successively with mode selection switch（K）, five-prevention operation switch（SB1）, breaker it is auxiliary
Help contact（QF）With the closing coil of breaker（LC）After series connection, the positive pole of working power is connected to；FET（T1）Leakage
Pole is connected to the negative pole of working power.
4. a kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase according to claim 1 or 2 or 3, it is special
Sign is：The square-wave signal output end of the zero point detection module（Vo）It is in series with inrush current prevention operating handle（SB0）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610384883.XA CN105870897B (en) | 2016-06-02 | 2016-06-02 | A kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610384883.XA CN105870897B (en) | 2016-06-02 | 2016-06-02 | A kind of inrush phenomenon restraining device for jumping breaker altogether based on three-phase |
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| Publication Number | Publication Date |
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| CN105870897A CN105870897A (en) | 2016-08-17 |
| CN105870897B true CN105870897B (en) | 2018-04-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558482A (en) * | 2004-01-15 | 2004-12-29 | 叶念国 | Static exciter inrush current inhibition method and apparatus |
| WO2011116488A1 (en) * | 2010-03-22 | 2011-09-29 | Siemens Aktiengesellschaft | Method and apparatus for suppressing an inrush current of a trans former |
| CN204167890U (en) * | 2014-11-05 | 2015-02-18 | 国家电网公司 | A kind of single-phase transformer inrush current suppression apparatus |
| CN105140885A (en) * | 2015-08-18 | 2015-12-09 | 淮沪电力有限公司 | Exciting surge suppression device of main transformer |
| CN205753381U (en) * | 2016-06-02 | 2016-11-30 | 国网山东省电力公司莱芜供电公司 | A kind of inrush phenomenon restraining device jumping chopper based on three-phase altogether |
-
2016
- 2016-06-02 CN CN201610384883.XA patent/CN105870897B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558482A (en) * | 2004-01-15 | 2004-12-29 | 叶念国 | Static exciter inrush current inhibition method and apparatus |
| WO2011116488A1 (en) * | 2010-03-22 | 2011-09-29 | Siemens Aktiengesellschaft | Method and apparatus for suppressing an inrush current of a trans former |
| CN204167890U (en) * | 2014-11-05 | 2015-02-18 | 国家电网公司 | A kind of single-phase transformer inrush current suppression apparatus |
| CN105140885A (en) * | 2015-08-18 | 2015-12-09 | 淮沪电力有限公司 | Exciting surge suppression device of main transformer |
| CN205753381U (en) * | 2016-06-02 | 2016-11-30 | 国网山东省电力公司莱芜供电公司 | A kind of inrush phenomenon restraining device jumping chopper based on three-phase altogether |
Non-Patent Citations (1)
| Title |
|---|
| 真空断路器投入并联电容器的过电压分析及防护;魏旭等;《高电压技术》;20141031;第40卷(第10期);第3193-3198页 * |
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| CN105870897A (en) | 2016-08-17 |
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