CN106877331A - A kind of AC circuit breaker arcing fault early warning method - Google Patents
A kind of AC circuit breaker arcing fault early warning method Download PDFInfo
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- CN106877331A CN106877331A CN201710111261.4A CN201710111261A CN106877331A CN 106877331 A CN106877331 A CN 106877331A CN 201710111261 A CN201710111261 A CN 201710111261A CN 106877331 A CN106877331 A CN 106877331A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
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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
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Keying Circuit Devices (AREA)
Abstract
The present invention relates to a kind of AC circuit breaker arcing fault early warning method, it is used to carry out early warning by obtaining AC circuit breaker dynamic arcing model, the method is comprised the following steps：1) AC circuit breaker arcing process is divided into the three phases of Time Continuous, including prebreakdown stage, arc stage and breath arc stage；2) prebreakdown stage, arc stage stage arcing model corresponding with the breath arc stage are obtained respectively；3) whole stage arcing models are temporally continuously engaged final acquisition AC circuit breaker dynamic arcing model；4) breaker arcing fault pre-alarming is carried out according to AC circuit breaker dynamic arcing model.Compared with prior art, the present invention has the advantages that technical support, more coincide, tallies with the actual situation.
Description
Technical field
The present invention relates to AC circuit breaker field of fault detection, more particularly, to a kind of AC circuit breaker arcing fault pre-alarming
Method.
Background technology
It is domestic so far to be completed super 15 long ranges that put into operation, extra high voltage direct current transmission line and 3 back-to-back changes of current
Stand.According to planning, 15 DC engineerings will be also put into operation in the recent period, total kW of change of current capacity 2.3 hundred million, the km of total track length 2.5 ten thousand, its
Include 14 ± 800kV and 1 ± 1100kV DC engineerings.
A large amount of due to power electronic devices are used, and the AC and DC side at direct-current transmission converter station are generated largely
Harmonic wave, in order to improve the quality of power supply, ensure the stable operation of electrical equipment, alternating current filter is connected in parallel on ac bus side use
With substantial amounts of harmonic wave in filtering appts, also for DC transmission system provides reactive-load compensation.To ensure the ability of reactive-load compensation, exchange
Filter circuit is often equipped with high-voltage capacitor group, and when normally running, according to daily dispatch scheduling active power of output, this is defeated
Go out the general fluctuation in the range of 70%~100% of power, therefore alternating current filter needs frequently to cut-off and closed high capacitive
Circuit, the quality of its running status directly affects the quality of power supply of direct current transportation and the stabilization of straight-flow system.Existing statistics knot
Really show, in the HVDC converter substation for having put into operation, occurred in that a lot of AC circuit breakers cut-off high voltage capacitive circuit
Arcing and punch-through afterwards, ultimately result in breaker blast, therefore to current conversion station alternating current filter arcing and puncture mechanism
Research is significant.However, Arc Modelling when AC circuit breaker arcing failure can be given currently without prior art.
The content of the invention
The purpose of the present invention is exactly that a kind of technical support, more is provided for the defect for overcoming above-mentioned prior art to exist
The AC circuit breaker arcing fault early warning method for coincide, tallying with the actual situation.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of AC circuit breaker arcing fault early warning method, is used to be carried out by obtaining AC circuit breaker dynamic arcing model
Early warning, the method is comprised the following steps：
1) AC circuit breaker arcing process is divided into the three phases of Time Continuous, including prebreakdown stage, arc stage
With the breath arc stage；
2) prebreakdown stage, arc stage stage arcing model corresponding with the breath arc stage are obtained respectively；
3) whole stage arcing models are temporally continuously engaged final acquisition AC circuit breaker dynamic arcing model；
4) breaker arcing fault pre-alarming is carried out according to AC circuit breaker dynamic arcing model.
Described step 2) in, the stage arcing model in prebreakdown stage is：
Wherein, RjT () is the arcing resistance in prebreakdown stage, c is unit length voltage, and l is arc length, and i is electric arc
Electric current, t1、t2It is the beginning and ending time point in prebreakdown stage.
Described step 2) in, the stage arcing model of arc stage is：
Rw(t)=a
Wherein, RwT () is the resistance of arc stage, a is certain value.
Described step 2) in, the stage arcing model in blow-out stage is：
Wherein, RxT () is the arcing resistance in blow-out stage, τ is breath arc time constant, and L is the equivalent electric of filter branches
Sense, R is the equivalent resistance of filter branches.
The arcing resistance value in described prebreakdown stage is 1 Ω.
Compared with prior art, the present invention has advantages below：
First, technical support：It is current domestic still without AC circuit breaker dynamic arcing Resistance model for prediction, by breaker arcing
The simulation of process, the reason for can more easily finding out arcing failure and occur, to realize giving warning in advance, breaker arcing failure is provided
Effectively support.
2nd, more it coincide：The arc resistance of pre- arc stage is relevant with the arc time of electric arc, with existing preset parameter
Arc Modelling compare, with actual arcing characteristic more coincide.
3rd, tally with the actual situation：In existing three-stage Arc Modelling, it is believed that rate of descent of pre- arc stage arc resistance etc.
In the climbing of breath arc stage arc resistance, so as to ignore the difference in pre- arc stage and breath arc stage in actual arcing failure
Characteristic.It is of the invention by pre- arc stage in order to preferably show the variation tendency of pre- arc stage and breath arc stage arc resistance
Represented with different expression formulas respectively with the breath arc stage, more tallied with the actual situation.
Brief description of the drawings
Fig. 1 is AC circuit breaker dynamic arcing model schematic.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
It is of the invention that the model of dynamic arc resistance is mainly divided into prebreakdown stage model, arc stage model and breath arc rank
Segment model.The Arc Modelling of segmented is constructed by analyzing the actual measurement electric arc dynamic changing process present invention, wherein, prebreakdown rank
Section arc resistance model uses revised Toepler models, and arc stage uses fixed resistance model, and the breath arc stage uses and refers to
Number rise model.
It is theoretical according to Thomson, when arcing failure occurs, arcing process can be divided into three sections：Prebreakdown stage, arcing rank
Section and breath arc stage, as shown in figure 1, figure is segmented dynamic arc Resistance model for prediction schematic diagram of the invention, wherein, t1~t2For
Prebreakdown stage, t2~t3When arc stage, t3~t4It is the blow-out stage.
Before prebreakdown and after breath arc, arc resistance remains a very big value, punctures moment, and resistance is quick
Decay, afterwards into arc stage, now arc resistance is the definite value of a very little, finally enters the breath arc stage, now electric arc electricity
Resistance increases quickly.
1) the prebreakdown stage
Work as t1≤ t ＜ t2When, this stage uses revised Toepler dynamic arcs Resistance model for prediction, and arc resistance calculates public
Formula is as follows：
In above formula, c is unit length voltage, and l is arc length, and i is arc current.
2) arc stage
Work as t2≤ t ＜ t3When, electric arc is turned on and in breakdown conditions are stablized, and now arc resistance is approximately very little
Fixed value, the resistance that the stabilization arcing moment is set in the present invention is 1 Ω.
3) the blow-out stage
Work as t3≤t≤t4When, the arc current that now system is provided is that the resistance between 0, breaker port is presented exponential form
Increase, then cease the arc stage arc resistance calculating formula it is as follows：
In HVDC transmission system, because alternating current filter is stable with breaker hair part-time, there is arcing
Failure it is smaller, and arcing fault data is difficult to obtain, and limited data deficiencies is realizing to DC converter station alternating current filter
Incipient fault detection and early warning.If the dynamic change characterization of energy accurate simulation AC circuit breaker arcing instant of failure arc resistance,
Enough arcing fault datas can be finally obtained, for accurately analysis arcing fault characteristic provides enough data supports.Want
Fault pre-alarming is realized, following two steps need to be carried out：
The first step：AC circuit breaker dynamic arcing model is set up, enough fault datas are obtained.
Second step：Using the arcing fault model set up, by analyzing the variation characteristic of related electric amount, final purpose is
Realize incipient fault detection and the early warning of DC converter station AC circuit breaker.
Warning step is as follows：
1) in normal operation, breaker is off, electric current i in circuitc(t)=0.If at a time t1Filtering
There is the absolute value of electric current first in device branch road | ic(t1) | >=0.01, until moment t2, the absolute value of electric current is shown as | ic(t2)|
＜ 0.01 and in ensuing 1ms, the electric current of filter branches meets all the time | ic(t) | ＜ 0.01, then it was initially believed that open circuit
Device there occurs arcing failure, and arcing failure now turns into pseudo- arcing failure.
2) in pseudo- arcing failure phase, fault filter needs to record arcing time started t1, end time t2, bus bar side
Voltage U (t) and practical measurement of current arcing current ic(t).According to the dynamic arcing model set up, just can obtain in the ideal case
Dynamic arc resistance Rm(t)。
3) according to bus bar side voltage U (t) and arcing current i of recordcT (), can try to achieve actual arcing resistance Rc(t), it is public
Formula is as follows：
4) the two arcing resistance R for trying to achievem(t) and RcT () can be write as two one-dimension array Rm(n) and Rc(n), n=1,
2 ..., N, then can try to achieve Rm(n) and RcThe coefficient correlation α of (n)mc, calculating formula is as follows：
Wherein,It is the arc resistance R tried to achieve according to modelmThe average value of (t),Actual recorder data is tried to achieve
Arc resistance RcThe average value of (t).
5) α is worked asmc>=0.8, illustrate that simulation arc resistance has stronger similitude with actual arc resistance, then it is assumed that now
Pseudo- arc stage be actual arc stage, system sends AC circuit breaker arcing fault pre-alarming signal, AC circuit breaker etc.
Treat further maintenance.If αmc＜ 0.8, illustrates that simulation arc resistance is weaker with the similitude of actual arc resistance, then it is assumed that this rank
The AC circuit breaker of section is not in arcing process occur, and AC circuit breaker normally runs, and prealarming process terminates.
Claims (5)
1. a kind of AC circuit breaker arcing fault early warning method, be used to by obtain AC circuit breaker dynamic arcing model carry out it is pre-
It is alert, it is characterised in that the method is comprised the following steps：
1) AC circuit breaker arcing process is divided into the three phases of Time Continuous, including prebreakdown stage, arc stage and breath
The arc stage；
2) prebreakdown stage, arc stage stage arcing model corresponding with the breath arc stage are obtained respectively；
3) whole stage arcing models are temporally continuously engaged final acquisition AC circuit breaker dynamic arcing model；
4) breaker arcing fault pre-alarming is carried out according to AC circuit breaker dynamic arcing model.
2. a kind of AC circuit breaker arcing fault early warning method according to claim 1, it is characterised in that described step
2) in, the stage arcing model in prebreakdown stage is：
Wherein, RjT () is the arcing resistance in prebreakdown stage, c is unit length voltage, and l is arc length, and i is arc current,
t1、t2It is the beginning and ending time point in prebreakdown stage.
3. a kind of AC circuit breaker arcing fault early warning method according to claim 1, it is characterised in that described step
2) in, the stage arcing model of arc stage is：
Rw(t)=a
Wherein, RwT () is the resistance of arc stage, a is certain value.
4. a kind of AC circuit breaker arcing fault early warning method according to claim 1, it is characterised in that described step
2) in, the stage arcing model in blow-out stage is：
Wherein, RxT () is the arcing resistance in blow-out stage, τ is breath arc time constant, and L is the equivalent inductance of filter branches, and R is
The equivalent resistance of filter branches.
5. a kind of AC circuit breaker arcing fault early warning method according to claim 3, it is characterised in that described preshot
The arcing resistance value for wearing the stage is 1 Ω.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710111261.4A CN106877331B (en) | 2017-02-28 | 2017-02-28 | Arc fault early warning method for alternating current circuit breaker |
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| CN201710111261.4A CN106877331B (en) | 2017-02-28 | 2017-02-28 | Arc fault early warning method for alternating current circuit breaker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561435A (en) * | 2017-08-31 | 2018-01-09 | 中国南方电网有限责任公司 | A kind of breaker arcing moment method of discrimination and system based on C-V characteristic |
| CN109408878A (en) * | 2018-09-17 | 2019-03-01 | 南方电网科学研究院有限责任公司 | Implementation method, device, equipment and the medium of field circuit method |
| CN110991013A (en) * | 2019-11-18 | 2020-04-10 | 国家电网有限公司 | Modeling method for simulating arc combustion dynamic process |
| CN113076643A (en) * | 2021-03-31 | 2021-07-06 | 国网陕西省电力公司电力科学研究院 | Method and system for analyzing rapid transient overvoltage signal |
| CN113792442A (en) * | 2021-09-28 | 2021-12-14 | 国网四川省电力公司电力科学研究院 | Modeling analysis method for arc light grounding fault of power distribution network |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392049A (en) * | 2014-11-26 | 2015-03-04 | 国家电网公司 | Modeling method for GIS disconnecting switch high frequency voltaic arc resistance model |
-
2017
- 2017-02-28 CN CN201710111261.4A patent/CN106877331B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392049A (en) * | 2014-11-26 | 2015-03-04 | 国家电网公司 | Modeling method for GIS disconnecting switch high frequency voltaic arc resistance model |
Non-Patent Citations (2)
| Title |
|---|
| J. AMAMATHL: "Very fast transient over-voltages and transient enclosure voltages in gas insulted", 《2003 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA》 * |
| 孟涛等: "分段电弧模型下VFTO的计算与分析", 《电工技术学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561435A (en) * | 2017-08-31 | 2018-01-09 | 中国南方电网有限责任公司 | A kind of breaker arcing moment method of discrimination and system based on C-V characteristic |
| CN107561435B (en) * | 2017-08-31 | 2020-07-07 | 中国南方电网有限责任公司 | Circuit breaker arcing time distinguishing method and system based on volt-ampere characteristics |
| CN109408878A (en) * | 2018-09-17 | 2019-03-01 | 南方电网科学研究院有限责任公司 | Implementation method, device, equipment and the medium of field circuit method |
| CN109408878B (en) * | 2018-09-17 | 2023-04-28 | 南方电网科学研究院有限责任公司 | Method, device, equipment and medium for realizing field coupling |
| CN110991013A (en) * | 2019-11-18 | 2020-04-10 | 国家电网有限公司 | Modeling method for simulating arc combustion dynamic process |
| CN113076643A (en) * | 2021-03-31 | 2021-07-06 | 国网陕西省电力公司电力科学研究院 | Method and system for analyzing rapid transient overvoltage signal |
| CN113792442A (en) * | 2021-09-28 | 2021-12-14 | 国网四川省电力公司电力科学研究院 | Modeling analysis method for arc light grounding fault of power distribution network |
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