CN105548838B - The method for diagnosing switchgear insulation defect - Google Patents
The method for diagnosing switchgear insulation defect Download PDFInfo
- Publication number
- CN105548838B CN105548838B CN201510933434.1A CN201510933434A CN105548838B CN 105548838 B CN105548838 B CN 105548838B CN 201510933434 A CN201510933434 A CN 201510933434A CN 105548838 B CN105548838 B CN 105548838B
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- switchgear
- type
- defect
- gas
- decomposition product
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- 230000007547 defect Effects 0.000 title claims abstract description 59
- 238000009413 insulation Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 30
- 238000003745 diagnosis Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 48
- 238000002474 experimental method Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims 1
- 238000012795 verification Methods 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000002245 particle Substances 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention discloses it is a kind of diagnosis switchgear insulation defect method, the method includes：Establish the detection pattern of atmospherical discharges decomposition product in switchgear；Establish the associate feature between atmospherical discharges decomposition product and switchgear interior insulation defect；According to the associate feature between the defect type and atmospherical discharges decomposition product, the insulation defect type in switchgear is determined.Method provided by the invention, the insulation defect in switchgear is determined by type, content and the variation tendency of gas component in detection switch cabinet, and to finding inside switch cabinet defect in time, adopting an effective measure avoids the further development of defect and reduction switchgear interruption of service from being of great significance.
Description
Technical field
The present invention relates to switchgear technical field more particularly to a kind of methods of diagnosis switchgear insulation defect.
Background technology
As soon as switchgear is the entirety for being assembled into the components such as each equipment, busbar, supporting insulator in its shell, this
So that its related experiment carries out after must being completed at the scene, but at the scene into experiments such as horizontal high voltage pressure resistance, PD, than in work
The difficulty that factory carries out is much larger.Once there is accident in closed switchgear, and opening-type equipment of the harm usually than separation in the past is tight
Weight, repair also want score from opening-type equipment it is complicated very much, the time for repairing consumption is also longer.Moreover, current switch
Cabinet product structure is more and more next compact, and built-in electrical insulation nargin reduces therewith, and premature insulator failure is difficult outside cabinet by people
Discover.
Burr may occur during fabrication in inside switch cabinet, and component may be loosened or be contacted not during installation and transportation
It is good, and then cause electrode potential to float, hot-spot；Insulation ag(e)ing in operation, in fact it could happen that metal particle, these premature insulators
Defect can all cause insulation degradation, in some instances it may even be possible to lead to different degrees of shelf depreciation (PD).Long-term PD can make insulation degradation
It damages and gradually expands, cause entire insulation breakdown or edge flashing, and then threaten to the safe operation of equipment, cause to set
It is standby to break down at runtime, so that cause system blackout.
When occurring PD inside equipment, air may discharge decomposition, can generate O3、NO、NO2、N2The gases such as O.Due to insulation
Shelf depreciation energy caused by defect and frequency difference, so as to cause inside switch cabinet air separation product is reflected in the presence of poor
It is different.It is the one kind for understanding switchgear interior insulation defect by type, content and the variation tendency of gas component in detection switch cabinet
Effective means adopt an effective measure and defect are avoided further to develop, reduce switchgear to finding inside switch cabinet defect in time
Interruption of service is of great significance.
Invention content
To solve existing technical problem, the embodiment of the present invention provides a kind of side of diagnosis switchgear insulation defect
Method.
In order to achieve the above objectives, the technical solution of the embodiment of the present invention is realized in：
A method of diagnosis switchgear insulation defect, the method includes：
Establish the detection pattern of atmospherical discharges decomposition product in switchgear；
Establish the associate feature between atmospherical discharges decomposition product and switchgear interior insulation defect；
According to the associate feature between the defect type and atmospherical discharges decomposition product, determine that the insulation in switchgear lacks
Fall into type.
Wherein, the associate feature established between atmospherical discharges decomposition product and switchgear interior insulation defect, including：
Switchgear analogue experiment installation is established in laboratory, different typical shelf depreciation defects and different discharge energies in analog switch cabinet
Under, type, concentration and the growth trend of atmospherical discharges decomposition product；Meanwhile not to switchgear analogue experiment installation setting
Same humidity value, during the atmospherical discharges decomposition product is changed with the difference of humidity, using the detection
Gas in switchgear analogue experiment installation described in pattern analysis screens different defects in switchgear, sky under different discharge energies
The characteristic gas type and changing rule of qi leel solution；Different defect types are equally established in true type switchgear, to the switch
The result that cabinet analogue experiment installation obtains further verify and correct；In the laboratory of the switchgear analogue experiment installation
On the basis of simulation and the experiment of true type switchgear, it is established that the associate feature between defect type and atmospherical discharges decomposition product.
Wherein, the detection pattern includes acquisition gas and detection gas component；The acquisition gas includes from switchgear
Handcart rear portion or lower section utilize preset gas production hole, by inside switch cabinet gas collecting to detection device, the detection device collection
At there are many gas eletrochemistry sensors；The detection gas component is completed to air in switchgear using the detection device
The detection of electric discharge decomposition product simultaneously obtains detection data.
Wherein, the associate feature according between the defect type and atmospherical discharges decomposition product, determines switchgear
Interior insulation defect type, including：According to the associate feature between the defect type and atmospherical discharges decomposition product, setting is special
Gas concentration value, gas production rate demand value are levied, the production that any type characteristic gas index in switchgear is more than specified is detected
The then early warning of gas velocity rate demand value；On the basis of the associate feature, encoded using the type of characteristic gas, gas concentration ratio
Information, further judge simultaneously determine switchgear in insulation defect type.
The embodiment of the present invention provides a kind of method of diagnosis switchgear insulation defect, passes through gas component in detection switch cabinet
Type, content and variation tendency determine the insulation defect in switchgear, to finding inside switch cabinet defect in time, taken
Effect measure avoids the further development of defect and reduction switchgear interruption of service from being of great significance.
Description of the drawings
In attached drawing (it is not necessarily drawn to scale), similar reference numeral phase described in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is the flow chart that the embodiment of the present invention diagnoses switchgear insulation defect method.
Specific implementation mode
As shown in Figure 1, the method for the embodiment of the present invention, switchgear insulation defect is diagnosed using atmospherical discharges decomposition components,
It can specifically include following steps：
Step 101：Establish the detection pattern of atmospherical discharges decomposition product in switchgear.
Here, detection pattern includes acquisition gas and detection gas component.Wherein, acquisition gas includes from switch cabinet handcart
Rear portion or lower section utilize preset gas production hole, by inside switch cabinet gas collecting to detection device.Detection gas component is to utilize
The detection device for being integrated with multiple gases electrochemical sensor is completed to atmospherical discharges decomposition product NO in switchgear2、NO、O3、CO
Detection and obtain detection data.
Step 102 is established between atmospherical discharges decomposition product and the defect type of switchgear interior insulation defect and is associated with spy
Property.
The detailed process of this step is as follows：1) switchgear analogue experiment installation is established in laboratory, in analog switch cabinet not
Under same typical shelf depreciation defect (including metallic projections, filth, particle defects) and different discharge energies, atmospherical discharges point
Solve type, concentration and the growth trend of product.Meanwhile considering the influence of moisture, the switchgear analogue experiment installation is arranged
Different humidity values observes the variation of atmospherical discharges decomposition product.The gas of the switchgear analogue experiment installation uses step
101 detection patterns established are analyzed, screen different defects in switchgear, under different discharge energies air separation feature gas
Body type and changing rule.2) different defect types are equally established in true type switchgear, the switchgear simulated experiment is filled
The result for setting acquisition further verify and correct.3) laboratory simulation in the switchgear analogue experiment installation and true type
On the basis of switchgear experiment, it is established that the associate feature between defect type and atmospherical discharges decomposition product.
Step 103：Associate feature between the defect type and atmospherical discharges decomposition product established according to step 102,1)
Characteristic gas concentration value, absolutely (or opposite) gas production rate demand value are set, once a certain characteristic gas refers in detection switchgear
Mark is more than the gas production rate demand value specified, at once early warning.2) on the basis of the associate feature, the kind of characteristic gas is utilized
The information of class, gas concentration ratio coding, further judges and determines the insulation defect type in switchgear.
The above method of the embodiment of the present invention passes through type, content and the variation tendency of gas component in detection switch cabinet
Determine the insulation defect in switchgear, to find in time inside switch cabinet defect, adopt an effective measure avoid defect into one
Step development and reduction switchgear interruption of service are of great significance.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (3)
1. a kind of method of diagnosis switchgear insulation defect, which is characterized in that the method includes：
Establish the detection pattern of atmospherical discharges decomposition product in switchgear；
Establish the associate feature between atmospherical discharges decomposition product and switchgear interior insulation defect；
According to the associate feature between defect type and atmospherical discharges decomposition product, the insulation defect type in switchgear is determined；
Wherein, the associate feature established between atmospherical discharges decomposition product and switchgear interior insulation defect, including：
Switchgear analogue experiment installation is established in laboratory, and different typical shelf depreciation defect and difference are put in analog switch cabinet
Under electric flux, type, concentration and the growth trend of atmospherical discharges decomposition product；Meanwhile to the switchgear analogue experiment installation
Different humidity values is set, during the atmospherical discharges decomposition product is changed with the difference of humidity, using institute
It states detection pattern and analyzes gas in the switchgear analogue experiment installation, screen different defects in switchgear, different electric discharge energy
The characteristic gas type and changing rule of the lower air separation of amount；
Different defect types are equally established in true type switchgear, the result that the switchgear analogue experiment installation obtains is carried out
Further verification and amendment；
On the basis of the laboratory simulation of the switchgear analogue experiment installation and true type switchgear are tested, it is established that defect class
Associate feature between type and atmospherical discharges decomposition product.
2. according to the method described in claim 1, it is characterized in that,
The detection pattern includes acquisition gas and detection gas component；
The acquisition gas includes utilizing preset gas production hole from switch cabinet handcart rear portion or lower section, and inside switch cabinet gas is adopted
For collection to detection device, the detection device is integrated with multiple gases electrochemical sensor；
The detection gas component is completed to the detection of atmospherical discharges decomposition product in switchgear simultaneously using the detection device
Obtain detection data.
3. according to the method described in claim 1, it is characterized in that, described decomposed according to the defect type and atmospherical discharges is produced
Associate feature between object determines the insulation defect type in switchgear, including：
According to the associate feature between the defect type and atmospherical discharges decomposition product, setting characteristic gas concentration value, aerogenesis
Rate demand value, it is more than that the specified gas production rate demand value is then pre- to detect any type characteristic gas index in switchgear
It is alert；
On the basis of the associate feature, the information encoded using the type of characteristic gas, gas concentration ratio is further sentenced
Break and determines the insulation defect type in switchgear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510933434.1A CN105548838B (en) | 2015-12-15 | 2015-12-15 | The method for diagnosing switchgear insulation defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510933434.1A CN105548838B (en) | 2015-12-15 | 2015-12-15 | The method for diagnosing switchgear insulation defect |
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| Publication Number | Publication Date |
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| CN105548838A CN105548838A (en) | 2016-05-04 |
| CN105548838B true CN105548838B (en) | 2018-10-12 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291272B (en) * | 2016-07-22 | 2018-10-16 | 中国科学院电工研究所 | A kind of high voltage switch cabinet fault monitoring device |
| CN106297506A (en) * | 2016-07-27 | 2017-01-04 | 国网浙江省电力公司金华供电公司 | Distribution true type simulated platform |
| CN109459671A (en) * | 2018-09-27 | 2019-03-12 | 国网浙江省电力有限公司湖州供电公司 | A kind of switch cabinet state monitoring method of the improvement neural network based on genetic algorithm |
| CN109085478B (en) * | 2018-09-27 | 2021-05-04 | 国网浙江省电力有限公司湖州供电公司 | Electrochemical method-based switch cabinet partial discharge detection device and control method |
| CN110187244B (en) * | 2019-04-30 | 2021-08-17 | 国网山西省电力公司电力科学研究院 | Fault detection device and method for switch cabinet |
| CN111008462A (en) * | 2019-11-20 | 2020-04-14 | 武汉大学 | Switch cabinet partial discharge detection method and device based on gas component analysis method |
| CN112305354A (en) * | 2020-10-23 | 2021-02-02 | 海南电网有限责任公司电力科学研究院 | Method for diagnosing defect type of sulfur hexafluoride insulation electrical equipment |
| CN112444604B (en) * | 2020-11-08 | 2023-07-25 | 国网辽宁省电力有限公司电力科学研究院 | Switch cabinet insulation degradation gas detection system and method |
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| CN102096028A (en) * | 2010-11-18 | 2011-06-15 | 山东电力集团公司泰安供电公司 | Local discharge monitoring sensor of noninvasive high-voltage switch cabinet |
| CN102520324A (en) * | 2011-12-27 | 2012-06-27 | 镇江市诚翔电器有限责任公司 | On-line insulation monitoring system for intelligent medium voltage switchgear and monitoring method of system |
| CN102608505A (en) * | 2012-03-30 | 2012-07-25 | 重庆大学 | Multi-region detection system for partial discharge decomposition components of insulating gas and method thereof |
| CN203606277U (en) * | 2013-12-06 | 2014-05-21 | 广西电网公司电力科学研究院 | Device for intelligently detecting ozone content of partial discharge of high-tension switch cabinet |
| CN105021958A (en) * | 2014-07-27 | 2015-11-04 | 国家电网公司 | Switch cabinet partial discharge data recording and analyzing method based on multi-sensor detection |
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| JP5334685B2 (en) * | 2009-05-27 | 2013-11-06 | 三菱電機株式会社 | Partial discharge detection device and partial discharge detection method |
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| CN102096028A (en) * | 2010-11-18 | 2011-06-15 | 山东电力集团公司泰安供电公司 | Local discharge monitoring sensor of noninvasive high-voltage switch cabinet |
| CN102520324A (en) * | 2011-12-27 | 2012-06-27 | 镇江市诚翔电器有限责任公司 | On-line insulation monitoring system for intelligent medium voltage switchgear and monitoring method of system |
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| CN105548838A (en) | 2016-05-04 |
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Address after: 570311 Hai Rui Road, Longhua District, Haikou, Hainan Province, No. 23 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF HAINAN POWER GRID Co.,Ltd. Address before: 570105, 13 floor, Xin Heng mansion, 123-8 Binhai Road, Haikou, Hainan. Patentee before: Hainan Power Technology Research Institute |
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Effective date of registration: 20231215 Address after: No. 23 Hairuihou Road, Longhua District, Haikou City, Hainan Province, 571100 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF HAINAN POWER GRID Co.,Ltd. Patentee after: Hainan Electric Power Industry Development Co.,Ltd. Address before: 570311 Hai Rui Road, Longhua District, Haikou, Hainan Province, No. 23 Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF HAINAN POWER GRID Co.,Ltd. |
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