CN106093769A - A kind of analysis method of arc-extinguishing chamber of circuit breaker electric life - Google Patents
A kind of analysis method of arc-extinguishing chamber of circuit breaker electric life Download PDFInfo
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- CN106093769A CN106093769A CN201610503378.2A CN201610503378A CN106093769A CN 106093769 A CN106093769 A CN 106093769A CN 201610503378 A CN201610503378 A CN 201610503378A CN 106093769 A CN106093769 A CN 106093769A
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- arc
- circuit breaker
- extinguishing chamber
- electric life
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
Abstract
The invention discloses a kind of analysis method of arc-extinguishing chamber of circuit breaker electric life, comprise the following steps: in the operating process of arc-extinguishing chamber of circuit breaker bearing load or fault current, monitor and record the drop-out current waveform during the prebreakdown current waveform in arc-extinguishing chamber of circuit breaker making process and arc time and separating brake and arc time, in order to determine the energy indexes in switch closing and switch opening operating process；Determine the ablation state of arc-extinguishing chamber of circuit breaker key position according to energy indexes analysis, and then determine flow field characteristic index according to ablation state analysis；Finally, by the contrast of flow field characteristic index Yu given threshold value, thus the electric life of arc-extinguishing chamber of circuit breaker is analyzed.
Description
Technical field:
The present invention relates to arc-extinguishing chamber of circuit breaker electric life analysis and evaluation areas, dividing of a kind of arc-extinguishing chamber of circuit breaker electric life
Analysis method.
Background technology:
Chopper, as a kind of power transmission and transforming equipment, plays control and protective effect in electrical network, it in power system not
Can or lack.Along with the rising of electric pressure, the status of chopper is the most crucial.The reliability of chopper, to whole system
Stability is particularly important.
Chopper, in its course of action, typically carries the short circuit current of system, and during short circuit interruption, electric arc
Extinguishing be the top priority of chopper.The ablation of electric arc can cause the permanent damage of critical component in arc-chutes, thus affects
To the service life of chopper itself, when ablation is serious, it is likely to result in the disabler of chopper, brings to power system the biggest
Harm, the electric life of arc-extinguishing chamber of circuit breaker have become as chopper use during an important research content.
For problem above, current study general is concentrated both ways, is on the one hand to improve critical component in arc-chutes
Resistance to ablation ability and the arc-rupturing capacity of arc-chutes itself, from design end solve this problem；On the other hand it is based on chopper
Experimental data and actual operating data, electric life remaining to chopper is estimated, and solves this problem from running end.
For current arc-extinguishing chamber of circuit breaker electric life assessment technology, contact head abrasive loss is mostly utilized to characterize.Touch
Head wear extent or evaluate with drop-out current summation, or the intensity of variation evaluation with arc loop contact resistance.These a few class assessment sides
Case is often limited to the tip type of arc-chutes, and the chopper actual arc time in running cannot accurately calculate, only
Arc-extinguishing chamber of circuit breaker electric life situation in type approval test can be combined roughly, provide the relative surplus amount of an electric life.
Visible, the analysis of arc-extinguishing chamber of circuit breaker electric life and assessment, the most not the shadow of arc-chutes fracture key components and parts
The factor of sound takes into account, if it is possible to considers arc-extinguishing chamber of circuit breaker design data, and has been combined with experimental data and service data
Come, then that can improve existing arc-extinguishing chamber of circuit breaker electric life analyzes the accuracy with assessment and the stability of assessment result.
Summary of the invention:
It is an object of the invention to provide a kind of analysis method of high-voltage breaker explosion chamber electric life, the method will be used for
In the assessment of primary cut-out service life, fully taking into account to cut-off with chopper has the typical component index of correlation directly contacted,
Improve precision and the stability of existing life assessment method.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that and realizes:
A kind of analysis method of arc-extinguishing chamber of circuit breaker electric life, comprises the following steps:
1) in the operating process of arc-extinguishing chamber of circuit breaker bearing load or fault current, monitor and record arc-extinguishing chamber of circuit breaker
Prebreakdown current waveform in making process and arc time TmakeWith the drop-out current waveform during separating brake and arc time
Topen, in order to determine the energy indexes Q in switch closing and switch opening operating process；
2) according to the current waveform in the operating process of described arc-extinguishing chamber of circuit breaker and arc time data, analyze and obtain
To the ablation state of arc-extinguishing chamber of circuit breaker key position, ablation state is carried out quantitatively characterizing by the change of spout critical size parameter M；
3) according to the ablation state of described arc-extinguishing chamber of circuit breaker, the i.e. change of spout critical size parameter M, analyze and obtain
Obtain flow field characteristic index B of spout ad-hoc location；
4) according to flow field characteristic index B of the spout ad-hoc location of described arc-extinguishing chamber of circuit breaker, with given threshold value C for sentencing
Calibration standard, analyzes the electric life situation obtaining arc-extinguishing chamber of circuit breaker, and wherein, flow field characteristic index B is closer to given threshold value C, disconnected
The residual life of road device arc-chutes electric life is the fewest.
The present invention is further improved by, the prebreakdown current in making process and the drop-out current during separating brake,
All characterize with virtual value I and analyzed；Energy indexes Q in the operation of arc-extinguishing chamber of circuit breaker switch closing and switch opening is with Q=I2× t table
Levying, described energy indexes Q is by surveying acquisition, and forms the first discrete parameter collection Q{Q1, Q2..., Qn}；Wherein, virtual value I is
Prebreakdown current in making process and the drop-out current during separating brake；For making process, t represents prebreakdown arc current
Persistent period；For separating brake process, t represents the arc current persistent period in interrupting process.
The present invention is further improved by, and the change of spout critical size parameter characterizes with percents, by testing
Mode obtains, and the measured value of spout critical size parameter forms the second discrete parameter collection M{M1, M2..., Mn}；First is discrete
Parameter set Q{Q1, Q2..., QnAnd the second discrete parameter collection M{M1, M2..., MnDiscrete parameter one_to_one corresponding in }.
The present invention is further improved by, described second discrete parameter collection M{M1, M2..., MnAnd the first discrete ginseng
Manifold Q{Q1, Q2..., QnMathematical relationship between } is by the first function M=f (Q) quantitative description.
The present invention is further improved by, and the quantitative expression of the first function M=f (Q) is based on probability analysis
Two discrete parameter collection M{M1, M2..., MnAnd the first discrete parameter collection Q{Q1, Q2..., QnNumerical fitting relation between }
Formula.
The present invention is further improved by, and flow field characteristic index is flow velocity or the flow parameter of spout ad-hoc location, institute
State flow field characteristic index and by surveying or emulate acquisition, and the 3rd discrete parameter collection B{B can be formed1, B2..., Bn}；3rd from
Dissipate parameter set B{B1, B2..., BnAnd the second discrete parameter collection M{M1, M2..., MnDiscrete parameter one_to_one corresponding in }.
The present invention is further improved by, described second discrete parameter collection M{M1, M2..., MnAnd the first discrete ginseng
Manifold Q{Q1, Q2..., QnMathematical relationship between } is by the second function B=g (M) quantitative description.
The present invention is further improved by, and the quantitative expression of the second function B=g (M) is based on probability analysis
Three discrete parameter collection B{B1, B2..., BnAnd the second discrete parameter collection M{M1, M2..., MnNumerical fitting relation between }
Formula.
The present invention is further improved by, and threshold value C is set as that the flow field of the spout ad-hoc location of arc-extinguishing chamber of circuit breaker is special
Property index B0Percent.
Relative to prior art, present invention have the advantage that:
1, in the present invention, evaluation index introduces jet size parameter and flow field parameter two finger of arc-extinguishing chamber of circuit breaker
Mark, evaluation index more horn of plenty；
2, use transmission function fashion, set up the corresponding model of circuit breaker electric parameter and physical parameter so that input and output
Relation is clear and definite, and characterizing method is the most direct effectively；
3, realize the contrast of chopper experiment and result data and design load, improve circuit breaker electrical endurance A+E
Accuracy, is conducive to preferably being estimated chopper residual life in the O&M stage.
Accompanying drawing illustrates:
Fig. 1 is arc-chutes spout schematic diagram of the present invention；
Fig. 2 is implementing procedure figure of the present invention.
Detailed description of the invention:
Below in conjunction with the accompanying drawings the present invention is described in further detail:
As it is shown in figure 1, illustrate for arc-extinguishing chamber of circuit breaker main injection jet model described in the embodiment of the present invention.Select spout certain bits
Put size as critical evaluation parameter, discrete manifold M{M needed for evaluating with composition1, M2..., Mn}。
The selection of this location parameter is different because structure design and evaluation need, and can select from ad-hoc location, it is possible to
Select multiple position construction parameter, each parameter is estimated respectively, to determine the weakest factor affecting electric life.
Illustrating for convenience, the present embodiment selects arc-chutes spout key position diameter d as single evaluation parameter.
Diameter d calibration range: in Fig. 1 in I～II section of dotted line confining spectrum, the diameter value on the normal plane of optional position.
Method provided by the present invention is utilized to carry out the specific implementation method of arc-chutes electric life assessment as follows:
Step S101: arranging electric life A+E threshold value C, this embodiment selects arc-chutes spout ad-hoc location initial
Flow field characteristic index B0Percent, the selection of ad-hoc location is as shown in Figure 1.
It should be noted that the selection of this position can be different with structure design and evaluation needs.
Monitor and record the prebreakdown current waveform during breaker closing and arc time Tmake。
Step S102: monitor and record the arc current waveform during breaker open operation and arc time Topen。
Step S103: utilize Q=I2× t calculates the arc energy during circuit-breaker switching on-off respectively, determines energy indexes
Q, forms the first discrete manifold Q{Q1, Q2..., Qn}。
Step S104: as it is shown in figure 1, analyze the ablation situation of spout, measure spout key position size d, record conduct
Size Evaluation parameter, forms the second discrete manifold M{M1, M2..., Mn}。
It should be noted that the discrete parameter one_to_one corresponding respectively that the first discrete manifold and the second dispersion number are concentrated, first
Transmission function is designated as M=f (Q).
Step S105: according to spout key position ablation situation, emulation its flow field characteristic of site-test analysis, formed the 3rd from
Dissipate manifold B{B1, B2..., Bn, and forming one-to-one relationship with the second discrete manifold, the second transmission function is designated as B=g
(M)。
Step S106: according to threshold value C, carry out state evaluation for function B, it is judged that the electric life state of arc-chutes.If manifold
B{B1, B2..., BnDiscrete parameter and C value very close to, or the mathematical distribution of function B levels off to C, and that is it is believed that go out
Arc chamber ablation degree is serious, and electric life state deteriorates.
Furthermore, due to the first transmission function and the coupling of the second transmission function, this evaluation index is so that electricity
Arc energy and flow field characteristic connect each other, it is achieved the diversification of state estimation, can by transfer function analysis obtain flow field index and
The direct mathematical relationship of ablation index so that evaluation result is more intuitive and reliable.
Implement the embodiment of the present invention, have the advantages that
In embodiments of the present invention, evaluation index introduces jet size parameter and the flow field parameter two of arc-extinguishing chamber of circuit breaker
Individual index, uses transmission function fashion, it is achieved chopper experiment and result data and the contrast of design load, thus improves chopper
The accuracy of electric life A+E, is conducive to preferably being estimated chopper residual life in the O&M stage.
Above disclosed it is only one preferred embodiment of the present invention, certainly can not limit the power of the present invention with this
Profit scope, the equivalent variations therefore made according to the claims in the present invention, still belong to the scope that the present invention is contained.
Claims (9)
1. the analysis method of an arc-extinguishing chamber of circuit breaker electric life, it is characterised in that comprise the following steps:
1) in the operating process of arc-extinguishing chamber of circuit breaker bearing load or fault current, monitor and record arc-extinguishing chamber of circuit breaker and close a floodgate
During prebreakdown current waveform and arc time TmakeWith the drop-out current waveform during separating brake and arc time Topen,
In order to determine the energy indexes Q in switch closing and switch opening operating process；
2) according to the current waveform in the operating process of described arc-extinguishing chamber of circuit breaker and arc time data, analyze and broken
The ablation state of road device arc-chutes key position, ablation state is carried out quantitatively characterizing by the change of spout critical size parameter M；
3) according to the ablation state of described arc-extinguishing chamber of circuit breaker, the i.e. change of spout critical size parameter M, analyze and obtain spray
Flow field characteristic index B of mouth ad-hoc location；
4) according to flow field characteristic index B of the spout ad-hoc location of described arc-extinguishing chamber of circuit breaker, with given threshold value C for judging mark
Standard, analyzes the electric life situation obtaining arc-extinguishing chamber of circuit breaker, and wherein, flow field characteristic index B is closer to given threshold value C, chopper
The residual life of arc-chutes electric life is the fewest.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 1, it is characterised in that making process
In prebreakdown current and drop-out current during separating brake, all characterize with virtual value I and analyzed；Arc-extinguishing chamber of circuit breaker closes
Energy indexes Q in lock and sub-switching operation is with Q=I2× t characterize, described energy indexes Q by surveying acquisition, and formed first from
Dissipate parameter set Q{Q1, Q2..., Qn}；Wherein, opening during prebreakdown current during virtual value I is making process and separating brake
Power-off stream；For making process, t represents the prebreakdown arc current persistent period；For separating brake process, t represents in interrupting process
The arc current persistent period.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 1, it is characterised in that spout is crucial
The change of dimensional parameters characterizes with percents, experiment method obtain, the measured value composition of spout critical size parameter
Second discrete parameter collection M{M1, M2..., Mn}；First discrete parameter collection Q{Q1, Q2..., QnAnd the second discrete parameter collection M
{M1, M2..., MnDiscrete parameter one_to_one corresponding in }.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 3, it is characterised in that described second
Discrete parameter collection M{M1, M2..., MnAnd the first discrete parameter collection Q{Q1, Q2..., QnMathematical relationship between } is by first
Function M=f (Q) quantitative description.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 4, it is characterised in that the first function
The quantitative expression of M=f (Q) is the second discrete parameter collection M{M based on probability analysis1, M2..., MnAnd the first discrete ginseng
Manifold Q{Q1, Q2..., QnNumerical fitting relational expression between }.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 1, it is characterised in that flow field characteristic
Index is flow velocity or the flow parameter of spout ad-hoc location, and described flow field characteristic index can be by surveying or emulate acquisition, and shape
Become the 3rd discrete parameter collection B{B1, B2..., Bn}；3rd discrete parameter collection B{B1, B2..., BnAnd the second discrete parameter collection
M{M1, M2..., MnDiscrete parameter one_to_one corresponding in }.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 6, it is characterised in that described second
Discrete parameter collection M{M1, M2..., MnAnd the first discrete parameter collection Q{Q1, Q2..., QnMathematical relationship between } is by second
Function B=g (M) quantitative description.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 7, it is characterised in that the second function
The quantitative expression of B=g (M) is the 3rd discrete parameter collection B{B based on probability analysis1, B2..., BnAnd the second discrete ginseng
Manifold M{M1, M2..., MnNumerical fitting relational expression between }.
The analysis method of a kind of arc-extinguishing chamber of circuit breaker electric life the most according to claim 1, it is characterised in that threshold value C sets
It is set to flow field characteristic index B of the spout ad-hoc location of arc-extinguishing chamber of circuit breaker0Percent.
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Cited By (8)
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| CN107192941A (en) * | 2017-05-03 | 2017-09-22 | 广州供电局有限公司 | The analysis method and management method of breaker dynamic load ability |
| CN108226769A (en) * | 2016-12-21 | 2018-06-29 | 伊顿公司 | For the system and method in the contact service life of observation circuit cutout |
| CN109633423A (en) * | 2018-11-14 | 2019-04-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of nozzle of circuit breaker ablation status assessing system |
| CN111220641A (en) * | 2019-11-21 | 2020-06-02 | 河南平高电气股份有限公司 | Ablation resistance detection device, detection method and evaluation method for arc extinguishing nozzle |
| CN111505496A (en) * | 2020-05-08 | 2020-08-07 | 西安交通大学 | Vacuum circuit breaker electric service life evaluation method based on arc energy |
| CN111933459A (en) * | 2020-07-20 | 2020-11-13 | 西安热工研究院有限公司 | Method for detecting electrical wear state of breaker contact by utilizing arc power |
| CN114372379A (en) * | 2022-01-19 | 2022-04-19 | 西安交通大学 | Mechanical direct current breaker contact electrical life evaluation method, device and equipment |
| CN115526540A (en) * | 2022-10-28 | 2022-12-27 | 苏州西门子电器有限公司 | Method and device for evaluating electric life, computer readable medium and electronic equipment |
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Cited By (12)
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| CN109633423A (en) * | 2018-11-14 | 2019-04-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of nozzle of circuit breaker ablation status assessing system |
| CN109633423B (en) * | 2018-11-14 | 2020-09-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Circuit breaker spout ablation state evaluation system |
| CN111220641A (en) * | 2019-11-21 | 2020-06-02 | 河南平高电气股份有限公司 | Ablation resistance detection device, detection method and evaluation method for arc extinguishing nozzle |
| CN111505496A (en) * | 2020-05-08 | 2020-08-07 | 西安交通大学 | Vacuum circuit breaker electric service life evaluation method based on arc energy |
| CN111933459A (en) * | 2020-07-20 | 2020-11-13 | 西安热工研究院有限公司 | Method for detecting electrical wear state of breaker contact by utilizing arc power |
| CN114372379A (en) * | 2022-01-19 | 2022-04-19 | 西安交通大学 | Mechanical direct current breaker contact electrical life evaluation method, device and equipment |
| CN114372379B (en) * | 2022-01-19 | 2024-02-02 | 西安交通大学 | Method, device and equipment for evaluating electrical life of contact of mechanical direct current breaker |
| CN115526540A (en) * | 2022-10-28 | 2022-12-27 | 苏州西门子电器有限公司 | Method and device for evaluating electric life, computer readable medium and electronic equipment |
| CN115526540B (en) * | 2022-10-28 | 2024-02-23 | 苏州西门子电器有限公司 | Method and device for evaluating electric life, computer readable medium and electronic equipment |
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