CN106291172B - A kind of composite insulator ageing state appraisal procedure - Google Patents
A kind of composite insulator ageing state appraisal procedure Download PDFInfo
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- CN106291172B CN106291172B CN201610604578.7A CN201610604578A CN106291172B CN 106291172 B CN106291172 B CN 106291172B CN 201610604578 A CN201610604578 A CN 201610604578A CN 106291172 B CN106291172 B CN 106291172B
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- aging
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- 239000012212 insulator Substances 0.000 title claims abstract description 104
- 239000002131 composite material Substances 0.000 title claims abstract description 90
- 230000032683 aging Effects 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910002808 Si–O–Si Inorganic materials 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 10
- 230000011218 segmentation Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 28
- 241000555745 Sciuridae Species 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 6
- 238000003483 aging Methods 0.000 description 33
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 16
- 229920000260 silastic Polymers 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012844 infrared spectroscopy analysis Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- 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
- G01R31/003—Environmental or reliability tests
Abstract
The present invention relates to a kind of composite insulator ageing state appraisal procedures, are assessed by following steps: (1) implementing accelerated ageing according to IEC62217-2005 standard；(2) infrared spectrum analysis is periodically carried out；(3) Si-O-Si main chain group and Si-CH are drawn3The relation curve of the corresponding peak area of side chain group and the revolution of accelerated ageing；The downward trend of (4) two relation curves is more obvious, then the composite insulator ageing resistance is weaker, and degree of aging is deeper；There are better than two relation curve declines of ageing resistance of the composite insulator of segmentation phenomenon in the process without there is the composite insulator of segmentation phenomenon；The present invention can assess the ageing state of composite insulator according to the result of infrared spectrum analysis, replace the higher insulator of degree of aging in advance, prevent the transmission line of electricity due to caused by composite insulator failure from tripping, ensure the safe and reliable operation of power grid.
Description
Technical field
The present invention relates to the detection method of electric system power transmission and transformation equipment outer insulation, especially a kind of composite insulator aging
State evaluating method.
Background technique
In recent decades, China's economy continues stable development, electricity needs rapid growth therewith, it is contemplated that arrive the year two thousand twenty China
Analyzing Total Electricity Consumption is up to about 7.5 trillion kilowatt hours, and demand installed capacity is more than 1,500,000,000 kilowatts.But the Energy Base in China and
In uneven distribution, this requires energy resources that must distribute rationally in China, also just determines me large-scale load center
State must build the super, extra-high voltage grid that can be realized long range, the transmission of large capacity electric energy.Super, extra-high voltage grid construction promotees
The extensive use of silicon rubber compound insulator is made.
Composite insulator will receive the comprehensive function of a variety of environmental factors of nature, such as electric field when long-term outdoor is run
And its caused shelf depreciation, water or moisture, ultraviolet radioactive, temperature, ozone, parasitic animal and plant and mechanical stress etc..In a variety of environment
Under the long-term complicated comprehensive function of stress, composite insulator will appear a variety of operation problems, such as aging, when composite insulator is sent out
After raw aging, there is deterioration in hydrophobicity, hardening, silicon rubber molecular degradation occurs in umbrella cover, and these problems have seriously affected compound
The normal operation of insulator, and then affect the safe and reliable operation of power grid.Therefore the aging shape of composite insulator how is assessed
State becomes problem in the urgent need to address.
Domestic and foreign scholars are the Aging Assessment side of composite insulator to the research emphasis of composite insulator ageing state at present
Method passes through visual inspection, hydrophobicity test, Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), thermally stimulated current
(TSC) etc. after the composite insulator aging of a variety of technique studies appearance, hydrophobicity and material physical and chemical performance changing rule, it is real
Effective assessment of composite insulator current material degree of aging is showed.But the ageing state of composite insulator not just represents
The existing degree of aging of silastic material reflects its anti-aging degree to a greater extent, only passes through associated aging appraisal procedure
The existing degree of aging of detection composite insulator can not reflect its ageing resistance, it is difficult to realize the remaining longevity of composite insulator
Life prediction can not judge that it, if appropriate for long-time hanging net operation is continued, causes a large amount of ageing resistances to be seriously damaged
Composite insulator continues hanging net operation for a long time, in the collective effect of the factors such as electric field, filth, moisture, ultraviolet light, shelf depreciation
Silastic material meeting quick aging, causes huge threat to the safe and reliable operation of transmission line of electricity.
In conclusion existing composite insulator aging assessment has the remaining life for being difficult to realize composite insulator pre-
It surveys, be difficult to the problems such as effectively assessing the ageing state of composite insulator, and the ageing resistance for studying composite insulator then can be more
Effectively reflect its ageing state, it is easier to the predicting residual useful life for realizing composite insulator, to the daily rotation plan of composite insulator
Formulation slightly has bigger reference value.
Summary of the invention
The object of the present invention is to provide a kind of composite insulator ageing state appraisal procedures, can be according to infrared spectrum analysis
Result the ageing state of composite insulator is assessed, replace the higher insulator of degree of aging in advance, prevent due to multiple
It closes transmission line of electricity caused by insulator breakdown to trip, ensures the safe and reliable operation of power grid.
To achieve the above object, include the following steps,
(1) accelerated ageing is implemented according to the squirrel wheel method in IEC62217-2005 standard to composite insulator to be assessed；
(2) infrared spectrum analysis periodically is carried out to the composite insulator in step (1), and records Si-O-Si main chain collection
Group and Si-CH3The corresponding peak area of side chain group；
(3) Si-O-Si main chain group and Si-CH are drawn respectively3Turn of the corresponding peak area of side chain group and accelerated ageing
Several relation curves；
(4) downward trend for two relation curves that step (3) is drawn is more obvious, then the composite insulator ageing resistance
Weaker, degree of aging is deeper；During two relation curve declines, there is the ageing resistance of the composite insulator of segmentation phenomenon
It is better than two relation curve declines in the process without there is the composite insulator of segmentation phenomenon, the compound exhausted of segmentation phenomenon occurs
The degree of aging of edge will be lower than during two relation curves declines without there is the composite insulator of segmentation phenomenon.
Preferably, composite insulator to be assessed before assessment, should intercept its partial sector as test specimen, test sample
Product should retain the original full skirt of composite insulator and sheath material, and install fitting additional to the test specimen both ends.
Preferably, turning to carry out infrared spectrum analysis to the composite insulator in step (1) every 500-1500.
Preferably, carrying out 32000 turns or more of operation when implementing accelerated ageing using squirrel wheel method.
Preferably, the part full skirt for cutting composite insulator to be assessed carries out Fourier in squirrel wheel method test process
Transform infrared spectroscopy analysis.
Preferably, the test density at Fourier transform infrared spectroscopy test initial stage is tested greater than Fourier transform infrared spectroscopy
The test density of mid-term and later period.
Preferably, the slope during two relation curve declines is bigger, then the composite insulator is anti-in step (4)
Aging ability is weaker, and degree of aging is deeper.
Preferably, carrying out infrared spectrum analysis to the composite insulator in step (1) every 1000 turns.
Good effect of the present invention is as follows:
The invention discloses a kind of composite insulator ageing state appraisal procedure, compound inslation when for assessing route operation
The ageing state of son utilizes Si-O-Si in Fourier transform infrared spectroscopy (FTIR) method test composite insulator ageing process
Group and Si-CH3The correspondence peak area of group, the degradation speed reflection for corresponding to peak area according to two group of composite insulator are compound
The ageing resistance of insulator, and its ageing state is reflected by the ageing resistance of composite insulator, the present invention surveys compound
Insulator silicon rubber material Si-O-Si group and Si-CH3The correspondence peak area of group is measured result, electric power enterprise dependent part
Door can be assessed according to ageing state of the test result to composite insulator, replace the higher insulator of degree of aging in advance,
It prevents the transmission line of electricity due to caused by composite insulator failure from tripping, ensures the safe and reliable operation of power grid.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the present invention；
Fig. 2 is No. 1 composite insulator Si-O-Si main chain group and Si-CH3Side chain group absorbs peak area with the change of revolution
Change curve；
Fig. 3 is No. 2 composite insulator Si-O-Si main chain groups and Si-CH3Side chain group absorbs peak area with the change of revolution
Change curve；
Fig. 4 is No. 3 composite insulator Si-O-Si main chain groups and Si-CH3Side chain group absorbs peak area with the change of revolution
Change curve.
Specific embodiment
It will make further narration in detail to the embodiment of the present invention below.
The present embodiment assesses the ageing state of Southern Hebei Network three different degree of aging operation composite insulators, has
Body is implemented as follows:
(1) partial sector of composite insulator is intercepted as test specimen, and sample should include that operation composite insulator is complete
Full skirt and sheath, should not have breakage, test product both ends should install fitting additional, and fitting crimps well with intercepted section.
From scene operation composite insulator, take the composite insulator of three different degree of agings as to be assessed compound
Insulator intercepts the partial sector in composite insulator to be assessed as sample, respectively marked as No. 1, No. 2 and No. 3.Sample
It should include the complete full skirt of operation composite insulator and sheath, should not there is a breakage, sample both ends should install fitting additional, fitting and cut
Take section crimping good.The creep distance of composite insulator to be assessed is 500mm.
(2) to composite insulator to be assessed according to squirrel wheel method specified in IEC62217-2005 standard and using immersion
The mode of salt water carries out accelerated ageing, and brine pit conductivity is 4.0mS/cm, completes 32000 turns altogether according to squirrel wheel method.
(3) infrared spectrum analysis (FTIR) periodically is carried out to the composite insulator in step (1), and records compound inslation
The silastic material Si-O-Si main chain group of son and Si-CH3The corresponding peak area of side chain group.FTIR test should be through entire
Squirrel wheel method operating process especially should be more as far as possible at squirrel wheel method operation initial stage per the shorter FTIR test interval should be the better twice
Shorten FTIR test interval, the test density that Fourier transform infrared spectroscopy tests initial stage is surveyed greater than Fourier transform infrared spectroscopy
The test density of mid-term and later period is tried, i.e., should increase the density of FTIR test at test initial stage, each FTIR analysis test should be remembered
Record Si-O-Si main chain group and Si-CH3Side chain group corresponds to peak area and implements the accumulative revolution of squirrel wheel method operation, test
Initial stage is preceding 1/3rd stage entirely tested, and the later period is the rear one third stage entirely tested, and mid-term is located at entire
Stage between the early period and later period of test.
In the present embodiment, when implementing squirrel wheel method operation revolution reach 1000,2000,3000,4500,6000,8000,
13000,19000,23000,26000,29000,32000 turns when, cut composite insulator to be assessed part full skirt carry out
FTIR test, and record Si-O-Si main chain group and Si-CH3Side chain group corresponds to peak area.
Si-O-Si main chain group and the corresponding peak area of Si-CH3 side chain group and the revolution of accelerated ageing are drawn respectively
Relation curve, No. 1, No. 2 and No. 3 curve graph drawn out after FTIR is tested of composite insulator to be assessed is respectively as schemed
2, shown in 3 and 4.
(4) respectively composite insulator No. 1, No. 2 and No. 3 to be assessed assessed.
As shown in Fig. 2, No. 1 composite insulator to be assessed during entire accelerated ageing Si-O-Si main chain group and
Si-CH3 side chain group is corresponding to be absorbed peak area outlet is not decreased obviously trend with the relation curve of revolution, illustrate entirely adding
Silastic material is not seriously damaged in fast ageing process, shows that the conjunction insulator has stronger ageing resistance, should
Class composite insulator may continue to the hanging net operation long period without there is more serious aging phenomenon, such composite insulator is old
Change lesser extent composite insulator.
As shown in figure 3, No. 2 composite insulators to be assessed are during entire accelerated ageing,
Si-O-Si main chain group and Si-CH3The corresponding absorption peak area of side chain group is obvious with the relation curve outlet of revolution
Downward trend, silastic material is destroyed during illustrating test, and insulator ageing resistance has deteriorated, and relationship is bent
The downward trend of line can be divided into three phases: the slow decline-rapid decrease of rapid decrease-, first stage slope is smaller, and holds
The continuous time is shorter, and the second stage slope of curve is substantially zeroed, and the duration is longer, and the phase III slope of curve is larger, this table
Such bright composite insulator can continue hanging net operation for a period of time, but as the increase of its runing time should be reinforced observing, with
Insulator is prevented to be in the quick aging stage of curve phase III, such insulator is medium aging composite insulator.
As shown in figure 4, No. 3 composite insulators to be assessed are during entire accelerated ageing,
Si-O-Si main chain group and Si-CH3The corresponding absorption peak area of side chain group is obvious with the relation curve outlet of revolution
Downward trend, the downward trend of Si-O-Si main chain group relation curve can be divided into three phases, each stage slope of curve compared with
Greatly；Si-CH3The downward trend of side chain group relation curve does not occur being obviously segmented phenomenon, and the slope of curve is larger.It is two comprehensive
The downward trend of curve can be determined that such composite insulator ageing resistance has been seriously damaged, and degree of aging is higher,
It is not suitable for continuing hanging net operation, prevents it in the effect quick aging of the environmental factors such as filth, electric arc, ultraviolet light, influence power grid
Safe and stable operation.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from the spirit or scope of the invention patent.Therefore, originally
Invention is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein
Consistent widest scope.
Claims (7)
1. a kind of composite insulator ageing state appraisal procedure, it is characterised in that: include the following steps,
(1) accelerated ageing is implemented according to the squirrel wheel method in IEC62217-2005 standard to composite insulator to be assessed；
(2) periodically in step (1) composite insulator carry out infrared spectrum analysis, and record Si-O-Si main chain group and
Si-CH3The corresponding peak area of side chain group；
(3) Si-O-Si main chain group and Si-CH are drawn respectively3The pass of the corresponding peak area of side chain group and the revolution of accelerated ageing
It is curve；
(4) downward trend of two relation curves that step (3) is drawn is more obvious, then the composite insulator ageing resistance compared with
Weak, degree of aging is deeper；During two relation curve declines, the ageing resistance for the composite insulator of segmentation phenomenon occur is wanted
Without there is the composite insulator of segmentation phenomenon during better than two relation curve declines, there is the compound inslation of segmentation phenomenon
The degree of aging of son will be lower than during two relation curves declines without there is the composite insulator of segmentation phenomenon.
2. a kind of composite insulator ageing state appraisal procedure according to claim 1, it is characterised in that: to be assessed answers
Insulator is closed before assessment, its partial sector should be intercepted as test specimen, it is original that test specimen should retain composite insulator
Full skirt and sheath material, and fitting is installed additional to the test specimen both ends.
3. a kind of composite insulator ageing state appraisal procedure according to claim 1, it is characterised in that: every 500-
1500 turns carry out infrared spectrum analysis to the composite insulator in step (1).
4. a kind of composite insulator ageing state appraisal procedure according to claim 3, it is characterised in that: use squirrel wheel method
When implementing accelerated ageing, 32000 turns or more of operation is carried out.
5. a kind of composite insulator ageing state appraisal procedure according to claim 1, it is characterised in that: surveyed in squirrel wheel method
During examination, the part full skirt for cutting composite insulator to be assessed carries out ftir analysis.
6. a kind of composite insulator ageing state appraisal procedure according to claim 1, it is characterised in that: in step (4),
Slope during two relation curve declines is bigger, then the ageing resistance of the composite insulator is weaker, and degree of aging is got over
It is deep.
7. a kind of composite insulator ageing state appraisal procedure according to claim 3, it is characterised in that: every 1000 turns
Infrared spectrum analysis is carried out to the composite insulator in step (1).
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Families Citing this family (5)
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| CN108872059B (en) * | 2018-09-10 | 2020-10-09 | 国网河北省电力有限公司电力科学研究院 | Composite insulator aging state assessment method and terminal equipment |
| CN110376155A (en) * | 2019-09-02 | 2019-10-25 | 云南电网有限责任公司电力科学研究院 | Composite insulator degradation detecting method and system based on infrared spectroscopy |
| CN112345435A (en) * | 2020-09-15 | 2021-02-09 | 中国电力科学研究院有限公司 | Composite insulator silicon rubber humid heat aging performance test and evaluation method |
| CN111965097A (en) * | 2020-09-29 | 2020-11-20 | 海南电网有限责任公司电力科学研究院 | Method for evaluating anti-aging performance of new composite insulator in tropical environment |
| CN111965131A (en) * | 2020-09-29 | 2020-11-20 | 海南电网有限责任公司电力科学研究院 | Composite insulator aging evaluation method based on infrared spectrum characteristic peak ratio method |
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