CN104578105B - A kind of shunt reactor Intelligent switching device and operation/cutting method - Google Patents
A kind of shunt reactor Intelligent switching device and operation/cutting method Download PDFInfo
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- CN104578105B CN104578105B CN201410853897.2A CN201410853897A CN104578105B CN 104578105 B CN104578105 B CN 104578105B CN 201410853897 A CN201410853897 A CN 201410853897A CN 104578105 B CN104578105 B CN 104578105B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 2
- 208000033748 Device issues Diseases 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a kind of shunt reactor Intelligent switching device, shunt reactor, the intelligent phase selection device of the electric-linked SF6 breakers connection of the electric-linked SF6 breakers of three-phase and three-phase being connected with bus including bus, current transformer is in series between the electric-linked SF6 breakers of three-phase and bus, the secondary circuit of current transformer is connected with intelligent phase selection device, voltage transformer is also equipped with bus, the secondary circuit of voltage transformer is connected with intelligent phase selection device.Operation/cutting method, the electric-linked SF6 breakers of three-phase are in normal operation, after intelligent phase selection device is connected to separating brake instruction, detection voltage transformer voltage signal, intelligent phase selection device is sent out separating brake and is instructed respectively by the decay time of setting, controls the firm branch of contact of the electric-linked each phase of SF6 breakers of three-phase all in 90 ° of Angle Positions of voltage.It is an advantage of the invention that：Based Intelligent Control is realized to breaker open operation process, it is ensured that dielectric strength is sufficient to resist the intensity for recovering voltage between fracture during each phase blow-out of breaker.
Description
Technical field
The present invention relates to a kind of shunt reactor Intelligent switching device and operation/cutting method.
Background technology
35kV shunt reactors are mainly used in reactive-load compensation in power system, when System Reactive Power changes need and
When switching is carried out to these reactors.In recent years, be there occurs in switching shunt reactor a lot of because switching overvoltage causes
Accident, these accidents gently then cause overvoltage protection act (such as arrester), serious will cause equipment burnout, very
To blast.Line side switching overvoltage during aircraft carrier line switching shunt reactor can even cause and become damage, and main transformer exports short
The failures such as road.The problem of 35kV shunt reactor switching overvoltage seriously threatens safe operation and the power station O＆M of power system
The personal safety of personnel.
To shunt reactor switching overvoltage mechanism of production, there are many highly developed achievements in research.It is now recognized that
The generation of shunt reactor switching overvoltage mainly has following reason：(1) cut-off overvoltage.When breaker is cut-offfing inductance
During property low current, because electric arc is unstable, current chopping phenomenon occurs before current over-zero.Equivalent time of shunt reactor switching
Based on electric capacity, inductance, this loop voltage electric current can not be mutated, and dam and necessarily cause strong electromagnetic viscosimeter, cause on road
Voltage.(2) resume combustion overvoltage.If recovering voltage build-up rate between fracture is more than insulation recovery speed in breaker interrupting process,
Recovering voltage can puncture generation resume combustion overvoltage by fracture.After resume combustion occurs, occur high frequency electric, high-frequency electrical between breaker fracture
When flowing through zero, fracture blow-out again, because fracture is opened away from inadequate after blow-out, still will appear from resume combustion.Due to overvoltage effect, break
Salty multiple " cut-offfing-resume combustion " this process, when the insulation distance between fracture is sufficiently large, arc extinction.Through statistics, single is opened
Resume combustion number of times is up to 128 times in disconnected, and three-phase resume combustion process duration is for up to 5ms, on rear resume combustion phase transient recovery voltage
The rate of liter may be up to 13kV/ μ s, and alternate overvoltage can exceed 8.0pu in the case of unprotect, and relatively overvoltage can exceed
4.0pu, seriously threatens equipment safety.
Zinc-Oxide Arrester is mainly installed in conventional shunt reactor switching overvoltage braking measure at present in the line
With RC resistance-capacitance absorption devices, these intelligence methods implement complicated, high cost, and are not enough to effectively administer shunt reactor switching mistake
Voltage.
The content of the invention
To solve the above problems, it is an object of the invention to provide a kind of shunt reactor Intelligent switching device and switching side
Method, using the electric-linked SF6 breakers of three-phase come switching shunt reactor, during shunt reactor is out of service, passes through
Intelligent phase selection device realized switching after the electric-linked SF6 circuit breaker currents zero passage of three-phase, it is ensured that each phase breaker blow-out again
Dielectric strength between moment fracture is all sufficient to resist recovery voltage strength, and resume combustion mutually occurs so as to avoid first opening, and effectively administers simultaneously
Join the generation of reactor operation overvoltage.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：A kind of shunt reactor intelligence
Energy switching device, including the electric-linked SF6 breakers of three-phase and the electric-linked SF6 breakers of three-phase that bus is connected with bus
The shunt reactor of connection, intelligent phase selection device, are in series with electric current mutual between the electric-linked SF6 breakers of three-phase and bus
Sensor, the secondary circuit of the current transformer is connected with intelligent phase selection device, and voltage transformer is also equipped with the bus,
The secondary circuit of the voltage transformer is connected with intelligent phase selection device.
At a kind of operation/cutting method of use shunt reactor Intelligent switching device, the first electric-linked SF6 breakers of three-phase
Normally run in "on" position shunt reactor, after intelligent phase selection device is connected to separating brake instruction, detection voltage transformer voltage letter
Number, intelligent phase selection device gives three-phase electric-linked SF6 breakers hair separating brake instruction respectively by the decay time of setting, controls three-phase
The firm branch of contact of the electric-linked each phase of SF6 breakers is all in 90 ° of Angle Positions of voltage.
Compared with prior art, it is an advantage of the invention that：Filled using the electric-linked SF6 breakers of three-phase and intelligent phase selection
Put, Based Intelligent Control realized to breaker open operation process, it is ensured that during each phase blow-out of breaker between fracture dielectric strength be enough to it is resistance to
By the intensity for recovering voltage, so as to fundamentally avoid the generation of shunt reactor switching overvoltage.
Brief description of the drawings
Fig. 1 is a kind of structural representation of shunt reactor Intelligent switching device of the invention；
Fig. 2 is three-phase intelligent phase-controlled schematic diagram.
Specific embodiment
It is a kind of shunt reactor Intelligent switching device of the invention, including the three-phase that bus 1 is connected with bus 1 refering to Fig. 1
Electric-linked SF6 breakers 3 and shunt reactor 4, the intelligent phase selection device 6 of the electric-linked connection of SF6 breakers 3 of three-phase, institute
State and be in series with current transformer 2, the secondary returning of the current transformer 2 between the electric-linked SF6 breakers 3 of three-phase and bus 1
Road is connected with intelligent phase selection device 6, and voltage transformer 5, the secondary returning of the voltage transformer 5 are also equipped with the bus 1
Road is connected with intelligent phase selection device 6.
At a kind of operation/cutting method of use shunt reactor Intelligent switching device, the first electric-linked SF6 breakers of three-phase
Normally run in "on" position shunt reactor, after intelligent phase selection device is connected to separating brake instruction, detection voltage transformer voltage letter
Number, intelligent phase selection device gives three-phase electric-linked SF6 breakers hair separating brake instruction respectively by the decay time of setting, controls three-phase
The firm branch of contact of the electric-linked each phase of SF6 breakers is all in 90 ° of Angle Positions of voltage, i.e. 0 ° of position of electric current, it is ensured that Mei Yixiang
Arc time maximize, so as to avoid the generation of shunt reactor switching overvoltage.
As shown in Fig. 2 Ia, Ib, Ic are respectively three-phase shunt reactor electric current, t 1, t2. and t3 be respectively A phases, B phases and
The firm timesharing of C phase arcing contacts is carved.T is current cycle, for 50Hz systems, T=20ms.Ta is the A phase arc times, and tb fires for B phases
Arc time, tc is the C phase arc times.△ t are A phase blow-out times and B, C phase blow-out time difference, for isolated neutral system
△ t=5ms.
A phases are separated in t1 moment arcing contact, and the arc time is ta=T/2；B phases are separated in t2 moment arcing contact, during arcing
Between tb=T/6+5ms；C phases are separated in t3 moment arcing contact, arc time tc=T/3+5ms.
Controlled by intelligent phase selection device, the three-phase electric-linked SF6 breakers arc time reaches maximum, in blow-out
Carve, all there is enough dielectric strengths to recover the intensity of voltage to tolerate between fracture.
By taking the electric-linked SF6 breakers of 30.5kV three-phases as an example, the experiment of its switching shunt reactor shows that the arc time is big
When 5ms, resume combustion probability is extremely low.So the control strategy described in this example fundamentally can effectively administer shunt reactor behaviour
Make overvoltage.
Use and can be filled by intelligent phase selection with the electric-linked SF6 breakers of the three-phase of phase-controlled, during separating brake
Put, control each phase arcing contact just to divide in current zero-crossing point, realize the maximization of three-phase breaker arc time, improve open circuit
The dielectric strength of device blow-out moment fracture, so as to avoid resume combustion, the generation of shunt reactor switching overvoltage.
Specific embodiment of the invention is the foregoing is only, but technical characteristic of the invention is not limited thereto, Ren Heben
The technical staff in field in the field of the invention, all cover among the scope of the claims of the invention by the change or modification made.
Claims (1)
1. a kind of operation/cutting method of shunt reactor Intelligent switching device, the shunt reactor Intelligent switching device, including mother
The shunt reactor of the electric-linked SF6 breakers connection of the electric-linked SF6 breakers of three-phase and three-phase that line is connected with bus,
Intelligent phase selection device, current transformer, the Current Mutual Inductance are in series between the electric-linked SF6 breakers of three-phase and bus
The secondary circuit of device is connected with intelligent phase selection device, and voltage transformer is also equipped with the bus, the voltage transformer
Secondary circuit is connected with intelligent phase selection device, it is characterised in that：Operation/cutting method is：First at the electric-linked SF6 breakers of three-phase
Normally run in "on" position shunt reactor, after intelligent phase selection device is connected to separating brake instruction, detection voltage transformer voltage letter
Number, intelligent phase selection device issues separating brake and instructs to the electric-linked SF6 breakers of three-phase respectively by the decay time of setting, control three
The firm branch of contact of the mutually electric-linked each phase of SF6 breakers is all in 90 ° of Angle Positions of voltage, i.e. 0 ° of position of electric current, it is ensured that each
The arc time of phase maximizes, so as to avoid the generation of shunt reactor switching overvoltage, it is ensured that each phase breaker puts out again
Dielectric strength between arc moment fracture is all sufficient to resist recovery voltage strength, and resume combustion mutually occurs so as to avoid first opening, and effectively administers
The generation of shunt reactor switching overvoltage；Ia, Ib, Ic are respectively three-phase shunt reactor electric current, and t 1, t2 and t3 is respectively A
Phase, B phases and the firm timesharing of C phase arcing contacts are carved, and T is current cycle, and for 50Hz systems, T=20ms, ta are A phase arc times, tb
It it is the B phase arc times, tc is the C phase arc times；△ t be A phase blow-out times and B, C phase blow-out time difference, for neutral point not
Earthed system △ t=5ms；A phases are separated in t1 moment arcing contact, and the arc time is ta=T/2；B phases are in t2 moment arcing contact point
From arc time tb=T/6+5ms；C phases are separated in t3 moment arcing contact, arc time tc=T/3+5ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410853897.2A CN104578105B (en) | 2014-12-31 | 2014-12-31 | A kind of shunt reactor Intelligent switching device and operation/cutting method |
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| CN201410853897.2A CN104578105B (en) | 2014-12-31 | 2014-12-31 | A kind of shunt reactor Intelligent switching device and operation/cutting method |
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| CN104578105A CN104578105A (en) | 2015-04-29 |
| CN104578105B true CN104578105B (en) | 2017-06-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106972487B (en) * | 2017-04-26 | 2020-06-02 | 广东电网有限责任公司电力科学研究院 | Reactor and implementation method thereof |
| CN108196117A (en) * | 2018-03-08 | 2018-06-22 | 云南电网有限责任公司电力科学研究院 | Shunt reactor switching overvoltage tests system |
| CN111799113A (en) * | 2020-06-09 | 2020-10-20 | 国网山东省电力公司检修公司 | Intelligent phase selection control system and method with function database storage function |
| CN113161981B (en) * | 2021-03-05 | 2023-12-22 | 国网江苏省电力有限公司盐城供电分公司 | SF6 information acquisition-based intelligent switching-on control method for high-voltage circuit breaker |
| CN115294819A (en) * | 2022-07-07 | 2022-11-04 | 国网浙江省电力有限公司金华供电公司 | Device for simulating function of secondary circuit of circuit breaker |
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| US6002289A (en) * | 1997-03-31 | 1999-12-14 | Chen; Nanming | Voltage peak switch closing method for shunt capacitor energization |
| CN101728114B (en) * | 2008-10-28 | 2012-08-29 | 国网电力科学研究院 | Light-operated modularization intelligent vacuum switch with phase-selecting function |
| CN204271661U (en) * | 2014-12-31 | 2015-04-15 | 国家电网公司 | A kind of shunt reactor Intelligent switching device |
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