CN109245047A - A kind of 110kV transformer excitation flow inhibits device and suppressing method - Google Patents
A kind of 110kV transformer excitation flow inhibits device and suppressing method Download PDFInfo
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- CN109245047A CN109245047A CN201811237390.9A CN201811237390A CN109245047A CN 109245047 A CN109245047 A CN 109245047A CN 201811237390 A CN201811237390 A CN 201811237390A CN 109245047 A CN109245047 A CN 109245047A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
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- 238000010586 diagram Methods 0.000 description 4
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- 230000005347 demagnetization Effects 0.000 description 3
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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
- 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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Abstract
The invention discloses a kind of 110kV transformer excitation flows to inhibit device and suppressing method, the device includes high-speed switch and controller system, the high-speed switch is connected between 110kV high voltage side of transformer and disconnecting switch, the breaking-closing operating of the controller system control high-speed switch；This method closes no-load transformer using phase selection switch technology, inhibits the closing time of device by individual-phase control transformer excitation flow, puts into transformer when pre- inducting flux is equal with the existing magnetic flux in iron core.The present invention realizes under the premise of not reducing transformer operating magnetic field flux and not changing existing breaker performance and working method, limits excitation surge current, eliminates false protection, improves power quality, improves equipment and operation of power networks reliability, is of great significance.
Description
Technical field
The present invention relates to transformer excitation flow technical fields, gush more specifically to a kind of 110kV static exciter
Stream inhibits device and suppressing method.
Background technique
With the development of industry, the demand to the practicability of power infrastructures and reliability is increasingly urgent to.Become when newly-built
When putting into after power station main transformer investment or Repair of Transformer, closing no-load transformer will appear larger excitation surge current, generate weight to power grid
It influences.In the case where particularly disadvantageous, combined floodgate excitation surge current reaches 20 times of rated current, transformer winding can be made in oil
Displacement is generated in case, it is possible to which the connection and coil destroyed between coil is coupled with terminal, eventually leads to winding open circuit.Meanwhile
The presence of excitation surge current can be considered as generation internal fault by differential protection, and protective relaying maloperation is caused to make；It is enriched in excitation surge current
Harmonic components be possible to cause system that resonance occurs under a certain frequency, very unfavorable shadow is generated to the power quality of power grid
It rings；DC component in excitation surge current can generate the machine torque of oscillation property on motor, will increase the oscillation of motor in turn
Influence its service life.
In order to inhibit no-load transformer combined floodgate excitation surge current, traditional countermeasure includes that pre-inserted resistance, transformer move back in advance
Magnetic, simple phase selection etc..Wherein, by the way of pre-inserted resistance, can play the role of inhibiting to shove to a certain extent,
But the up-front investment of equipment, later maintenance and fault point are increased, and are increasingly shown and are unsatisfactory for power supply reliability requirement.In advance
First demagnetization refers at the scene using AC or DC demagnetizing method eliminating transformer residual flux；AC demagnetization is exactly in transformer
Low-pressure side adds alternating voltage, and high pressure neutral ground slowly increases voltage to voltage rating, and holding is slowly dropped to after a certain period of time
Zero；Direct current demagnetization transformer high-voltage winding both ends it is positive, reversely each lead into fixed DC current, and positive, reverse current
Same time is kept, is gradually reduced electric current later, both demagnetizing methods do not have Standard Operating Procedure, only judge by rule of thumb
Often still there is larger excitation surge current in Transformer Close in magnetic effect.Simple phase selection switch technology refers to that measurement becomes in advance
Depressor iron core residual flux, and breaker is made mutually to close a floodgate in the same time in expected magnetic flux with iron core residual flux, it has the disadvantage in that
1) residual flux detection accuracy is low, 2) since currently used breaker is mostly SF6Breaker, stroke is long, and closing power is big,
Operating mechanism is mostly spring mechanism or hydraulic mechanism, and typical closing time is greater than 100ms, and mechanism is vulnerable to pressure, environment temperature, pre-
The factors such as breakdown influence, and it is big to operate dispersibility, it is difficult to meet accurate divide-shut brake requirement.Existing suppressing method inhibits excitation to gush
It flows and is forced that differential guarantor is braked or temporarily adjusted using differential protection without practical application substantially in ineffective perhaps engineering
Shield setting valve method hides excitation surge current, and this method cannot tackle the problem at its root, it is also possible to cause false protection.
Summary of the invention
The technical problem to be solved by the present invention is to propose that a kind of 110kV transformer excitation flow inhibits device and inhibition
Method.
The purpose of the present invention is achieved through the following technical solutions: designing a kind of 110kV transformer excitation flow suppression
Device processed, including high-speed switch and controller system, the high-speed switch are connected to 110kV high voltage side of transformer and disconnecting switch
Between, the breaking-closing operating of the controller system control high-speed switch.
In the above scheme, the high-speed switch is composed in series by two high-speed switch units.
In the above scheme, the high-speed switch unit is made of a capacitor and a switch in parallel, described quickly to open
Close unit voltage rating be 110kV, drop-out current 40kA, opening time be less than 1.2ms, separating brake dispersion degree be less than ±
0.1ms, for separating brake angle error less than 3.6 degree, closing time is less than 15ms, and combined floodgate dispersion degree is less than ± 0.2ms, and combined floodgate angle error is small
In 7.2 degree；The capacitance of capacitor is 100nF.
In the above scheme, the control system is by power circuit, signal conditioning circuit, internal trigger circuit, AD conversion
And FPGA acquisition control circuit, ARM calculating control circuit, vacuum switch divide-shut brake control circuit composition；The power circuit is used
Analog circuit, digital circuit, I/O control circuitry power supply in for hardware cell；The AD conversion and FPGA acquisition control circuit by
AD conversion control circuit connect composition with FPGA acquisition control circuit；The input terminal of the signal conditioning circuit accesses voltage input
Signal, the output end of the signal conditioning circuit are connect with the input terminal of internal trigger circuit, AD conversion control circuit respectively, institute
The output end for stating internal trigger circuit is connect with FPGA acquisition control circuit, and the ARM calculating control circuit and FPGA acquisition are controlled
Circuit connection processed, the vacuum switch divide-shut brake control circuit are connect with ARM calculating control circuit.
In the above scheme, the vacuum switch divide-shut brake control circuit includes vacuum switch sub-gate control circuit, vacuum
Contacting controling circuit is switched, the vacuum switch sub-gate control circuit, vacuum switch contacting controling circuit calculate with ARM control respectively
Circuit connection processed, the vacuum switch sub-gate control circuit, vacuum switch contacting controling circuit all have Power Solid State relay,
IO buffer circuit is connected between the Power Solid State relay and ARM calculating control circuit.
The present invention also provides a kind of 110kV transformer excitation flow suppressing method, this method is closed using phase selection switch technology
No-load transformer is closed, inhibits the closing time of device by the above-mentioned 110kV transformer excitation flow of individual-phase control, in induction magnetic in advance
Transformer is put into when logical equal with the existing magnetic flux in iron core.
Specific method is, when combined floodgate, preceding two-phase closes first, and the voltage between phases for closing two-phase before condition meets is produced in iron core
Raw expection magnetic flux is equal with its residual flux；It is closed after third phase, the condition of closing meets the dynamic that third phase is generated in iron core
Magnetic flux is equal with expected magnetic flux.
A kind of above-mentioned 110kV transformer excitation flow suppressing method, concrete operations the following steps are included:
Step1, voltage acquisition module determine input voltage U；
Step2, adjustment signal generate a sinusoidal reference signal U12；
Step3 determines the residual flux Φ in core limbr1、Φr2；
Step4, zero point identification, sinusoidal signal U12Become square wave S1；
Step5, differential generate the signal S comprising pulse2, with S1Raising and lowering slope it is consistent；
Step6, rectification, generating only includes S2Positive pulse signal signal S3；
Step7 calculates first conjunction related closing operation moment t1；
Step8 closes related closing operation moment t after calculating2；
Step9, circuit breaker lock control signal S0, without S0When block signal S3；
Step10, time delay, t1With the difference signal S of feed motion time4Delay, delay time t1When with feed motion
Between difference, output signal S5；
Step11, time delay, S5Postpone t2, output signal S6；
Step12, output vacuum switch head conjunction mutually close control signal S7；
Step13, export vacuum switch after close mutually close control signal S8。
The closing time of three corresponding residual fluxes and magnetizing inrush current suppression device, circular are as follows:
Record last transformer separating brake moment t0, residual flux Φ in AB phase core limbr1Are as follows:
ΦmFor stable state magnetic flux amplitude, ω is angular frequency；
The magnetic flux phi under core limb homeostasis where AB phase coilAB(t) meet integral relation with applied voltage,
Stable state magnetic flux forms three-phase symmetrical system, therefore phase magnetic flux is defined as in other two core limb:
It is expected that most preferably to close the time when magnetic flux is equal with its residual flux, then t at the time of AB phase is put into1:
Φt1=Φr1 (5)
From t1From moment, BC and CA phase magnetic flux enters transient process, and magnetic flux expression formula is as follows:
α, β indicate the symmetry coefficient of iron core, and τ is time constant, is determined by the inductance and resistance in circuit, transient state magnetic flux Φ0BC
And Φ0CACalculating process is as follows:
Φr2、Φr3Indicate that AB phase closes t1The residual flux of BC, CA phase at moment, then:
ΦBC(t1)=Φr2 (9)
ΦCA(t1)=Φr3 (10)
By required Φr2、Φr3And t1Formula (11) and formula (12) are substituted into, constant Φ is obtained0BCAnd Φ0CA,
Φ0BC=Φr2+αΦr1 (11)
Φ0CA=Φr3+βΦr1 (12)
Same BC with CA phase meets expected magnetic flux and the transient state magnetic flux equal moment is optimal on-off time, it may be assumed that
ΦBC(t2)=ΦBC(t1) (13)
ΦCA(t2)=ΦCA(t1) (14)
The time difference t closed due to front and back2-t1Far smaller than timeconstantτ then has
Solve to obtain BC and CA phase on-off time t2:
Compared with prior art, the invention has the following advantages:
The present invention proposes a kind of integrated apparatus for being able to suppress transformer excitation flow and method, and realization is not reducing change
Depressor operating magnetic field flux and under the premise of not changing existing breaker performance and working method, limits excitation surge current, eliminates protection and miss
Dynamic, improvement power quality, raising equipment and operation of power networks reliability, are of great significance.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the application connection schematic diagram that 110kV transformer excitation flow inhibits device in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram for the high-speed switch that 110kV transformer excitation flow inhibits device in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram for the controller that 110kV transformer excitation flow inhibits device in the embodiment of the present invention；
Fig. 4 is the flow diagram of 110kV transformer excitation flow suppressing method in the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.
For transformer excitation flow problem, the present invention inhibits inrush phenomenon using phase control closing method.As shown in Figure 1, this
Invention provides a kind of 110kV transformer excitation flow inhibition device, including high-speed switch (KK) and controller system (CS), quickly
Switch is connected between 110kV high voltage side of transformer and disconnecting switch, and controller system controls the breaking-closing operating of high-speed switch.
The killer switch used in electric system at present is mostly SF6Breaker, stroke is long, and closing power is big, actuating machine
Structure is mostly spring mechanism or hydraulic mechanism, and typical closing time is in 60~80ms, and mechanism is vulnerable to pressure, environment temperature, prebreakdown
Etc. factors influence, operate that dispersibility is big, the best combined floodgate angle preset or calculated is difficult because of the dispersibility of switch closing time
To meet accurate divide-shut brake requirement.In order to solve the problems, such as that switch branch wire time and dispersibility, the present invention are used by quickly denounceing
The vacuum switch of force mechanisms driving realizes transformer breaking-closing operating.As shown in Fig. 2, high-speed switch is by two high-speed switch units
It is composed in series, high-speed switch unit is made of a capacitor and a switch in parallel, the high-speed switch voltage rating of composition
110kV, drop-out current 40kA meet system access standard；Opening time is less than 1.2ms, and dispersion degree is less than ± 0.1ms, separating brake
Angle error < 3.6 degree, closing time are less than 15ms, and dispersion degree is less than ± 0.2ms, and combined floodgate angle error < 7.2 degree meet excitation surge current
Inhibit time and the dispersion degree requirement of divide-shut brake.Meanwhile being used to the voltage of balanced two high-speed switch units using equalizing capacitance
The capacitance of distribution condition, equalizing capacitance is 100nF, can reach preferable equalizing effect.
For the magnetizing inrush current suppression device using phase control closing, control system is very crucial.As shown in figure 3, control system
System calculates control electricity by power circuit, signal conditioning circuit, internal trigger circuit, AD conversion and FPGA acquisition control circuit, ARM
Road, vacuum switch divide-shut brake control circuit composition；AD conversion and FPGA acquisition control circuit are by AD conversion control circuit and FPGA
Acquisition control circuit connection composition；The input terminal of signal conditioning circuit accesses voltage input signal, the output of signal conditioning circuit
End is connect with the input terminal of internal trigger circuit, AD conversion control circuit respectively, and output end and the FPGA of internal trigger circuit are adopted
Collect control circuit connection, ARM calculating control circuit connect with FPGA acquisition control circuit, vacuum switch divide-shut brake control circuit and
The connection of ARM calculating control circuit.Wherein, vacuum switch divide-shut brake control circuit includes vacuum switch sub-gate control circuit, vacuum
Contacting controling circuit is switched, vacuum switch sub-gate control circuit, vacuum switch contacting controling circuit calculate control electricity with ARM respectively
Road connection, vacuum switch sub-gate control circuit, vacuum switch contacting controling circuit all have Power Solid State relay, Power Solid State
IO buffer circuit is connected between relay and ARM calculating control circuit.
Power circuit is mainly realized to analog circuit, digital circuit, I/O control circuitry power supply in hardware cell.Signal condition
Circuit realizes the functions such as decaying, offset, impedance transformation, the low-pass filtering of external input signal.Internal trigger circuit is by benchmark electricity
Comparator and high speed voltage comparator composition are pressed, main completion 50Hz AC signal crosses zero start acquisition or predeterminated voltage starting
Acquire function.AD conversion and FPGA acquisition control circuit mainly complete the works such as acquisition and the processing caching of dual-channel analog signal
Make, use 12 bit synchronization AD conversion chip of monolithic ADI company, selects variable low jitter differential clocks as change over clock, adopt
Collecting control unit selects the high-end low-power consumption technical grade high-performance CYCLONE-V Series FPGA of ALTERA to control as acquisition control processing
There is external hardware triggering and software to trigger control function for device processed, trigger collection unit.ARM calculating control circuit is mainly completed outer
Portion's voltage signal acquisition, digital filter, algorithm calculate the functions such as analysis, the control of vacuum switch divide-shut brake, select ST meaning method half
The newest high-performance low-power-consumption embedded controller of ARMV7 core architecture technical grade of conductor is as master controller, dominant frequency 216M, with
FPGA communication is mainly carried out by the external parallel data/address bus of ARM controller, control bus is completed and the FIFO of FPGA unit
Interface carries out data exchange.
Control system mainly realizes the breaking-closing operating control of vacuum switch.Signal is controlled by ARM computer control unit
Output designs voltage, current output capability that special IO buffer circuit improves control signal, it is ensured that reliably to vacuum switch
Power Solid State relay in divide-shut brake control circuit carries out triggering control.
The present invention also provides a kind of 110kV transformer excitation flow suppressing method, this method is closed using phase selection switch technology
No-load transformer is closed, inhibits the closing time of device by the above-mentioned 110kV transformer excitation flow of individual-phase control, in induction magnetic in advance
Transformer is put into when logical equal with the existing magnetic flux in iron core.
Specific method is, when combined floodgate, preceding two-phase closes first, and the voltage between phases for closing two-phase before condition meets is produced in iron core
Raw expection magnetic flux is equal with its residual flux；It is closed after third phase, the condition of closing meets the dynamic that third phase is generated in iron core
Magnetic flux is equal with expected magnetic flux.
As shown in figure 4, a kind of above-mentioned 110kV transformer excitation flow suppressing method, concrete operations the following steps are included:
Step1, voltage acquisition module determine input voltage U；
Step2, adjustment signal generate a sinusoidal reference signal U12；
Step3 determines the residual flux Φ in core limbr1、Φr2；
Step4, zero point identification, sinusoidal signal U12Become square wave S1；
Step5, differential generate the signal S comprising pulse2, with S1Raising and lowering slope it is consistent；
Step6, rectification, generating only includes S2Positive pulse signal signal S3；
Step7 calculates first conjunction related closing operation moment t1；
Step8 closes related closing operation moment t after calculating2；
Step9, circuit breaker lock control signal S0, without S0When block signal S3；
Step10, time delay, t1With the difference signal S of feed motion time4Delay, delay time t1When with feed motion
Between difference, output signal S5；
Step11, time delay, S5Postpone t2, output signal S6；
Step12, output vacuum switch head conjunction mutually close control signal S7；
Step13, export vacuum switch after close mutually close control signal S8。
The closing time of three corresponding residual fluxes and magnetizing inrush current suppression device, circular are as follows:
Record last transformer separating brake moment t0, residual flux Φ in AB phase core limbr1Are as follows:
ΦmFor stable state magnetic flux amplitude, ω is angular frequency；
The magnetic flux phi under core limb homeostasis where AB phase coilAB(t) meet integral relation with applied voltage,
Stable state magnetic flux forms three-phase symmetrical system, therefore phase magnetic flux is defined as in other two core limb:
It is expected that most preferably to close the time when magnetic flux is equal with its residual flux, then t at the time of AB phase is put into1:
Φt1=Φr1 (5)
From t moment, BC and CA phase magnetic flux enters transient process, and magnetic flux expression formula is as follows:
α, β indicate the symmetry coefficient of iron core, and τ is time constant, is determined by the inductance and resistance in circuit, transient state magnetic flux Φ0BC
And Φ0CACalculating process is as follows:
Φr2、Φr3Indicate that AB phase closes t1The residual flux of BC, CA phase at moment, then:
ΦBC(t1)=Φr2 (9)
ΦCA(t1)=Φr3 (10)
By required Φr2、Φr3And t1Formula (11) and formula (12) are substituted into, constant Φ is obtained0BCAnd Φ0CA,
Φ0BC=Φr2+αΦr1 (11)
Φ0CA=Φr3+βΦr1 (12)
Same BC with CA phase meets expected magnetic flux and the transient state magnetic flux equal moment is optimal on-off time, it may be assumed that
ΦBC(t2)=ΦBC(t1) (13)
ΦCA(t2)=ΦCA(t1) (14)
The time difference t closed due to front and back2-t1Far smaller than timeconstantτ then has
Solve to obtain BC and CA phase on-off time t2:
The embodiment of the present invention is described in attached drawing, but the invention is not limited to above-mentioned specific embodiment parties
Formula, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are in this hair
Under bright enlightenment, without breaking away from the scope protected by the purposes and claims of the present invention, many forms can be also made, this
It is belonged within protection of the invention a bit.
Claims (9)
1. a kind of 110kV transformer excitation flow inhibits device, which is characterized in that including high-speed switch and controller system, institute
High-speed switch is stated to be connected between 110kV high voltage side of transformer and disconnecting switch, the controller system control high-speed switch
Breaking-closing operating.
2. a kind of 110kV transformer excitation flow according to claim 1 inhibits device, which is characterized in that described quick
Switch is composed in series by two high-speed switch units.
3. a kind of 110kV transformer excitation flow according to claim 2 inhibits device, which is characterized in that described quick
Switch unit is made of a capacitor and a switch in parallel, and the voltage rating of the high-speed switch unit is 110kV, cut-offs electricity
Stream is 40kA, and opening time is less than 1.2ms, and separating brake dispersion degree is less than ± 0.1ms, and separating brake angle error is less than 3.6 degree, closing time
Less than 15ms, combined floodgate dispersion degree is less than ± 0.2ms, and combined floodgate angle error is less than 7.2 degree；The capacitance of capacitor is 100nF.
4. a kind of 110kV transformer excitation flow according to claim 1 or 2 or 3 inhibits device, which is characterized in that institute
Control system is stated to be counted by power circuit, signal conditioning circuit, internal trigger circuit, AD conversion and FPGA acquisition control circuit, ARM
Calculate control circuit, vacuum switch divide-shut brake control circuit composition；The power circuit is used for as analog circuit, number in hardware cell
Word circuit, I/O control circuitry power supply；The AD conversion and FPGA acquisition control circuit are acquired by AD conversion control circuit and FPGA
Control circuit connection composition；The input terminal of the signal conditioning circuit accesses voltage input signal, the signal conditioning circuit
Output end is connect with the input terminal of internal trigger circuit, AD conversion control circuit respectively, the output end of the internal trigger circuit
It is connect with FPGA acquisition control circuit, the ARM calculating control circuit is connect with FPGA acquisition control circuit, the vacuum switch
Divide-shut brake control circuit is connect with ARM calculating control circuit.
5. a kind of 110kV transformer excitation flow according to claim 4 inhibits device, which is characterized in that the vacuum
Switching divide-shut brake control circuit includes vacuum switch sub-gate control circuit, vacuum switch contacting controling circuit, the vacuum switch
Sub-gate control circuit, vacuum switch contacting controling circuit are connect with ARM calculating control circuit respectively, the vacuum switch separating brake control
Circuit processed, vacuum switch contacting controling circuit all have Power Solid State relay, and the Power Solid State relay and ARM, which are calculated, to be controlled
IO buffer circuit is connected between circuit processed.
6. a kind of 110kV transformer excitation flow suppressing method, which is characterized in that this method closes sky using phase selection switch technology
Transformer is carried, when inhibiting the combined floodgate of device by any one of the individual-phase control claim 1-5 110kV transformer excitation flow
Between, transformer is put into when pre- inducting flux is equal with the existing magnetic flux in iron core.
7. a kind of 110kV transformer excitation flow suppressing method according to claim 6, which is characterized in that preceding when combined floodgate
Two-phase closes first, closes expection magnetic flux and its residual flux phase that the voltage between phases of two-phase before condition meets is generated in iron core
Deng；It is closed after third phase, it is equal with expected magnetic flux that the condition of closing meets the dynamic magnetic flux that third phase is generated in iron core.
8. a kind of 110kV transformer excitation flow suppressing method according to claim 6 or 7, which is characterized in that including with
Lower step:
Step1, voltage acquisition module determine input voltage U；
Step2, adjustment signal generate a sinusoidal reference signal U12；
Step3 determines the residual flux Φ in core limbr1、Φr2；
Step4, zero point identification, sinusoidal signal U12Become square wave S1；
Step5, differential generate the signal S comprising pulse2, with S1Raising and lowering slope it is consistent；
Step6, rectification, generating only includes S2Positive pulse signal signal S3；
Step7 calculates first conjunction related closing operation moment t1；
Step8 closes related closing operation moment t after calculating2；
Step9, circuit breaker lock control signal S0, without S0When block signal S3；
Step10, time delay, t1With the difference signal S of feed motion time4Delay, delay time t1With the feed motion time
Difference, output signal S5；
Step11, time delay, S5Postpone t2, output signal S6；
Step12, output vacuum switch head conjunction mutually close control signal S7；
Step13, export vacuum switch after close mutually close control signal S8。
9. a kind of 110kV transformer excitation flow suppressing method according to claim 8, which is characterized in that record upper one
Secondary transformer separating brake moment t0, residual flux Φ in AB phase core limbr1Are as follows:
ΦmFor stable state magnetic flux amplitude, ω is angular frequency；
The magnetic flux phi under core limb homeostasis where AB phase coilAB(t) meet integral relation with applied voltage,
Stable state magnetic flux forms three-phase symmetrical system, therefore phase magnetic flux is defined as in other two core limb:
It is expected that most preferably to close the time when magnetic flux is equal with its residual flux, then t at the time of AB phase is put into1:
Φt1=Φr1 (5)
From t1From moment, BC and CA phase magnetic flux enters transient process, and magnetic flux expression formula is as follows:
α, β indicate the symmetry coefficient of iron core, and τ is time constant, is determined by the inductance and resistance in circuit, transient state magnetic flux Φ0BCWith
Φ0CACalculating process is as follows:
Φr2、Φr3Indicate that AB phase closes t1The residual flux of BC, CA phase at moment, then:
ΦBC(t1)=Φr2 (9)
ΦCA(t1)=Φr3 (10)
By required Φr2、Φr3And t1Formula (11) and formula (12) are substituted into, constant Φ is obtained0BCAnd Φ0CA,
Φ0BC=Φr2+αΦr1 (11)
Φ0CA=Φr3+βΦr1 (12)
Same BC with CA phase meets expected magnetic flux and the transient state magnetic flux equal moment is optimal on-off time, it may be assumed that
ΦBC(t2)=ΦBC(t1) (13)
ΦCA(t2)=ΦCA(t1) (14)
The time difference t closed due to front and back2-t1Far smaller than timeconstantτ then has
Solve to obtain BC and CA phase on-off time t2:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237390.9A CN109245047B (en) | 2018-10-23 | 2018-10-23 | 110kV transformer excitation surge suppression device and suppression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237390.9A CN109245047B (en) | 2018-10-23 | 2018-10-23 | 110kV transformer excitation surge suppression device and suppression method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109245047A true CN109245047A (en) | 2019-01-18 |
| CN109245047B CN109245047B (en) | 2024-03-08 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501590A (en) * | 2019-08-13 | 2019-11-26 | 山东电力设备有限公司 | Magnetizing inrush current suppression device, the system and method for for transformer idle-loaded switching-on |
| CN110994551A (en) * | 2019-11-26 | 2020-04-10 | 国网宁夏电力有限公司电力科学研究院 | Excitation inrush current suppression device and method for transformer |
| CN110988469A (en) * | 2019-11-14 | 2020-04-10 | 中国矿业大学 | Rapid harmonic detection method |
| CN111600295A (en) * | 2019-08-09 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Power frequency transformer excitation inrush current suppression strategy applied to controllable inversion |
| CN111884204A (en) * | 2020-06-12 | 2020-11-03 | 武汉天富海科技发展有限公司 | Phase selection switching control method of non-contact regulation voltage stabilizing device |
| CN113937731A (en) * | 2021-09-29 | 2022-01-14 | 南京钢铁股份有限公司 | Method for restraining magnetizing inrush current of transformer |
| CN114389469A (en) * | 2021-12-02 | 2022-04-22 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Power converter performance optimization method and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010004686A (en) * | 2008-06-20 | 2010-01-07 | Toshiba Corp | Apparatus for suppressing exciting inrush current of transformer and method of controlling the same |
| JP2012043711A (en) * | 2010-08-20 | 2012-03-01 | Toshiba Corp | Excitation inrush current suppressor |
| JP2013030301A (en) * | 2011-07-27 | 2013-02-07 | Toshiba Corp | Excitation inrush current suppression device |
| CN104319752A (en) * | 2014-11-06 | 2015-01-28 | 山东大学 | Inrush current restraining system and method based on residual magnetism prediction and circuit breaker discreteness improvement |
| CN104362920A (en) * | 2014-10-22 | 2015-02-18 | 国家电网公司 | Self-adaptive magnetizing inrush current restraining device and method thereof |
| CN107968389A (en) * | 2017-12-27 | 2018-04-27 | 国网辽宁省电力有限公司电力科学研究院 | A kind of transformer excitation flow restraining device and suppressing method based on remanent magnetism estimation |
| JP2018152272A (en) * | 2017-03-14 | 2018-09-27 | 三菱電機株式会社 | Exciting rush current suppression device and power switchgear |
| CN209088523U (en) * | 2018-10-23 | 2019-07-09 | 国家电网公司 | A kind of 110kV transformer excitation flow inhibition device |
-
2018
- 2018-10-23 CN CN201811237390.9A patent/CN109245047B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010004686A (en) * | 2008-06-20 | 2010-01-07 | Toshiba Corp | Apparatus for suppressing exciting inrush current of transformer and method of controlling the same |
| JP2012043711A (en) * | 2010-08-20 | 2012-03-01 | Toshiba Corp | Excitation inrush current suppressor |
| JP2013030301A (en) * | 2011-07-27 | 2013-02-07 | Toshiba Corp | Excitation inrush current suppression device |
| CN104362920A (en) * | 2014-10-22 | 2015-02-18 | 国家电网公司 | Self-adaptive magnetizing inrush current restraining device and method thereof |
| CN104319752A (en) * | 2014-11-06 | 2015-01-28 | 山东大学 | Inrush current restraining system and method based on residual magnetism prediction and circuit breaker discreteness improvement |
| JP2018152272A (en) * | 2017-03-14 | 2018-09-27 | 三菱電機株式会社 | Exciting rush current suppression device and power switchgear |
| CN107968389A (en) * | 2017-12-27 | 2018-04-27 | 国网辽宁省电力有限公司电力科学研究院 | A kind of transformer excitation flow restraining device and suppressing method based on remanent magnetism estimation |
| CN209088523U (en) * | 2018-10-23 | 2019-07-09 | 国家电网公司 | A kind of 110kV transformer excitation flow inhibition device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600295A (en) * | 2019-08-09 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Power frequency transformer excitation inrush current suppression strategy applied to controllable inversion |
| 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 |
| CN110501590A (en) * | 2019-08-13 | 2019-11-26 | 山东电力设备有限公司 | Magnetizing inrush current suppression device, the system and method for for transformer idle-loaded switching-on |
| CN110988469A (en) * | 2019-11-14 | 2020-04-10 | 中国矿业大学 | Rapid harmonic detection method |
| CN110988469B (en) * | 2019-11-14 | 2021-03-16 | 中国矿业大学 | Rapid harmonic detection method |
| CN110994551A (en) * | 2019-11-26 | 2020-04-10 | 国网宁夏电力有限公司电力科学研究院 | Excitation inrush current suppression device and method for transformer |
| CN111884204A (en) * | 2020-06-12 | 2020-11-03 | 武汉天富海科技发展有限公司 | Phase selection switching control method of non-contact regulation voltage stabilizing device |
| CN113937731A (en) * | 2021-09-29 | 2022-01-14 | 南京钢铁股份有限公司 | Method for restraining magnetizing inrush current of transformer |
| CN114389469A (en) * | 2021-12-02 | 2022-04-22 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Power converter performance optimization method and system |
| CN114389469B (en) * | 2021-12-02 | 2022-11-04 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Power converter performance optimization method and system |
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