CN104215409B - A kind of method of monitoring bushing shell for transformer sealing condition - Google Patents
A kind of method of monitoring bushing shell for transformer sealing condition Download PDFInfo
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- CN104215409B CN104215409B CN201410456364.0A CN201410456364A CN104215409B CN 104215409 B CN104215409 B CN 104215409B CN 201410456364 A CN201410456364 A CN 201410456364A CN 104215409 B CN104215409 B CN 104215409B
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- gas
- sleeve pipe
- way valve
- air
- density
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008676 import Effects 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Landscapes
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention relates to a kind of method of monitoring bushing shell for transformer sealing condition, comprise the following steps：（1）Pouring orifice on sleeve pipe conservator installs the SF with three-way valve6Air density meter；（2）Vacuum pump is connected with an import of three-way valve, the air in sleeve pipe is extracted out, stop evacuation when the pressure in sleeve pipe is close to vacuum；（3）By SF6Gas cylinder is connected with another import of three-way valve, is filled with SF toward in sleeve pipe6Gas, stops gas injection, two imports of good seal three-way valve when the gas pressure in sleeve pipe reaches 0.05MPa；（4）By SF6Air density meter is to the SF in sleeve pipe6Gas density carries out real-time monitoring, when bobbin seal is good, SF6The density value of gas will not change；When bobbin seal is bad, SF6The density value of gas diminishes.The present invention, to bobbin seal monitor in real time, pinpoints the problems in time at the bobbin seal impaired initial stage, effectively prevents the large-scale power grid accident causing because of sealing problem.
Description
Technical field
The present invention relates to a kind of method of monitoring bushing shell for transformer sealing condition, belong to power system power transmission and transforming equipment online
Monitoring field.
Background technology
By adverse weather conditions, bushing shell for transformer leads to the fault of internal discharge even blast increasingly to increase because of watered and wetting
Many, harmful effect is caused to the safe and stable operation of grid equipment.At present, the sealing condition for inside pipe casing does not temporarily have
Related research and counter-measure, existing test method and on-Line Monitor Device all cannot be made moist to sleeve pipe in the very first time and be carried
Go out early warning.
Content of the invention
In order to find the problem of bushing shell for transformer poor sealing in time, it is an object of the invention to provide a kind of monitoring transformation
The method of device bobbin seal situation, the method is filled with SF toward inside bushing shell for transformer6Gas, by monitoring SF6Gas density is supervising
Real-time status depending on bobbin seal.
To achieve these goals, the technical scheme is that：A kind of method of monitoring bushing shell for transformer sealing condition,
Comprise the following steps：
（1）SF with three-way valve is installed at the pouring orifice on bushing shell for transformer conservator6Air density meter, three-way valve
Outlet is connected with pouring orifice by adaptor；
（2）The pipeline of vacuum pump is connected with an import of three-way valve, the air in sleeve pipe is extracted out, when the pressure in sleeve pipe
Power close to vacuum when stop evacuation；
（3）By SF6The pipeline of gas cylinder is connected with another import of three-way valve, is filled with SF toward in sleeve pipe6Gas, when in sleeve pipe
Gas pressure reach during 0.05MPa stopping gas injection, two imports of good seal three-way valve；
（4）By SF6The SF to inside pipe casing for the air density meter6Gas density carries out real-time monitoring, when bobbin seal is good
When, SF6The density value of gas will not change；When bobbin seal is bad, not only SF6Gas can be revealed, and the moisture of in the air
Also inside pipe casing can be penetrated into by bobbin seal weakness, now SF6Air density meter shows SF6The density of gas declines.
Further, the method also includes step（5）, work as SF6When the density of gas drops to predetermined warning value, explanation
Bobbin seal has gone wrong, and the test that should have a power failure, is checked.
Further, in step（1）In, SF6Liquid filling body in air density meter, during weakening transformer station high-voltage side bus
The impact to pointer for the vibrations.
Further, in step（2）In, when the pressure in sleeve pipe reaches 200Pa, stop evacuation.
The invention has the advantages that：The method passes through to introduce SF into sleeve pipe6Gas, by monitoring SF6Gas is close
Degree carrys out the sealing situation of monitoring sleeve, thus realizing the monitor in real time to bobbin seal；Can at the bobbin seal impaired initial stage and
When pinpoint the problems, effectively prevent the large-scale power grid accident that set off an explosion because of inside pipe casing watered and wetting, to electric power netting safe running
There is high economic benefit.
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure：1- bushing shell for transformer conservator, 2- pouring orifice, 3- adaptor, 4- three-way valve, 5-SF6Air density meter, 6- is true
Empty pump, 7- SF6Gas cylinder.
Specific embodiment
As shown in figure 1, a kind of method of monitoring bushing shell for transformer sealing condition, comprise the following steps：
（1）SF with three-way valve 4 is installed at the pouring orifice 2 on bushing shell for transformer conservator 16Air density meter 5, threeway
The outlet of valve 4 is connected with pouring orifice 2 by adaptor 3；Adaptor 3 one end of the present invention is connected with pouring orifice 2, the other end with
SF6Air density meter 5 connects, the SF with three-way valve 46Air density meter 5 meets inflation/deflation needs；Adaptor 3 size according to
Pouring orifice 2 on sleeve pipe conservator 1 and SF6The size design of density meter 5 connector.
（2）The pipeline of vacuum pump 6 is connected with an import of three-way valve 4, the air in sleeve pipe is extracted out, when in sleeve pipe
Pressure close to vacuum when stop evacuation；During actual installation, SF should be re-filled with first by sleeve pipe evacuation6Gas.
（3）By SF6The pipeline of gas cylinder 7 is connected with another import of three-way valve 4, is filled with SF toward in sleeve pipe6Gas, works as sleeve pipe
In gas pressure reach during 0.05MPa stopping gas injection, two imports of good seal three-way valve 4；The present invention is by SF6Gas is from set
Pouring orifice 2 on pipe conservator 1 is filled with, SF6Gas-insulated is functional, is widely used to the built-in electrical insulation of chopper at present,
The requirement of high-voltage operation can be met, its relative molecular weight is more than air, is slightly soluble in transformer oil.
（4）By SF6The SF to inside pipe casing for the air density meter 56Gas density carries out real-time monitoring, when bobbin seal is good
When good, SF6The density value of gas will not change；When bobbin seal is bad, not only SF6Gas can be revealed, and the water of in the air
Divide and also inside pipe casing can be penetrated into by bobbin seal weakness, now SF6Air density meter 5 shows SF6The density of gas declines
To outside normal range；Therefore, it can by SF6Whether the change of gas density value is good come the sealing to judge bushing shell for transformer.
In step（1）In, SF6Fill certain liquid in air density meter 5 and carry out damping, to weaken transformer station high-voltage side bus process
In the impact to pointer for the vibrations, it is to avoid SF6Air density meter 5 produces error.In step（2）In, such as when the pressure in sleeve pipe
When power reaches 200Pa, stop evacuation.
In transformator actual motion, when bushing shell for transformer good seal, because the temperature by Transformer becomes
Change impact, the insulating oil of inside pipe casing can expand with heat and contract with cold, thus leading to SF6Gas density can change within the specific limits, therefore
A warning value can be preset, for example, have dropped 10% respective value.In the present embodiment, the method may also include step
（5）, work as SF6When the density of gas drops to predetermined warning value, illustrate that bobbin seal has gone wrong, the test that should have a power failure,
Checked.
The present invention injects SF in sleeve pipe6Gas, then by monitoring SF6The change of gas density value is judging transformator set
Pipe whether poor sealing；By the real-time monitoring to bobbin seal, defect can be found in time at the initial stage of making moist and be processed,
Inside pipe casing insulation is avoided to deteriorate further and cause power grid accident it is ensured that electric power netting safe running.The present invention is in bushing shell for transformer
Monitoring field be firstly introduced in chopper kind equipment use extensive SF6Gas, creatively utilizes SF6Gas is supervising
Survey bushing shell for transformer sealing condition, solve a difficult problem for bobbin seal monitoring.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (2)
1. a kind of method of monitoring bushing shell for transformer sealing condition is it is characterised in that comprise the following steps：
（1）SF with three-way valve is installed at the pouring orifice on bushing shell for transformer conservator6Air density meter, the outlet of three-way valve
It is connected with pouring orifice by adaptor；SF6Liquid filling body in air density meter, to weaken the vibrations during transformer station high-voltage side bus
Impact to pointer；
（2）The pipeline of vacuum pump is connected with an import of three-way valve, the air in sleeve pipe is extracted out, when the pressure in sleeve pipe connects
Stop evacuation during nearly vacuum；
（3）By SF6The pipeline of gas cylinder is connected with another import of three-way valve, is filled with SF toward in sleeve pipe6Gas, when the gas in sleeve pipe
Body pressure reaches stopping gas injection, two imports of good seal three-way valve during 0.05MPa；
（4）By SF6The SF to inside pipe casing for the air density meter6Gas density carries out real-time monitoring, when bobbin seal is good,
SF6The density value of gas will not change；When bobbin seal is bad, not only SF6Gas can be revealed, and the moisture of in the air
Inside pipe casing can be penetrated into by bobbin seal weakness, now SF6Air density meter shows SF6The density of gas declines；
（5）Work as SF6When the density of gas drops to predetermined warning value, illustrate that bobbin seal has gone wrong, should have a power failure examination
Test, checked.
2. according to claim 1 monitoring bushing shell for transformer sealing condition method it is characterised in that：In step（2）In,
When the pressure in sleeve pipe reaches 200Pa, stop evacuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456364.0A CN104215409B (en) | 2014-09-10 | 2014-09-10 | A kind of method of monitoring bushing shell for transformer sealing condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456364.0A CN104215409B (en) | 2014-09-10 | 2014-09-10 | A kind of method of monitoring bushing shell for transformer sealing condition |
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| Publication Number | Publication Date |
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| CN104215409A CN104215409A (en) | 2014-12-17 |
| CN104215409B true CN104215409B (en) | 2017-03-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106124135B (en) * | 2016-08-31 | 2019-05-03 | 国家电网公司 | A kind of device and method sealing tiny leakage for detecting high-power transformer cannula tip |
| CN109580432B (en) * | 2019-01-28 | 2020-06-02 | 贵州电网有限责任公司 | SF (sulfur hexafluoride)6/N2Method for testing leakage characteristics of hybrid electrical equipment |
| CN112067211B (en) * | 2020-09-07 | 2022-07-08 | 中国南方电网有限责任公司超高压输电公司天生桥局 | Method and device for judging SF6 gas leakage in GIS sleeve, electronic equipment and storage medium |
| CN112816140B (en) * | 2020-12-31 | 2023-08-15 | 国网湖南省电力有限公司 | Device and method for on-site detection of oil seepage performance of high-voltage bushing of transformer |
| CN114061869A (en) * | 2021-11-16 | 2022-02-18 | 广东电网有限责任公司 | Device and method for detecting damage position of oil conservator |
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| JP2625342B2 (en) * | 1993-01-06 | 1997-07-02 | 日本電信電話株式会社 | Gas concentration calibration method and calibration equipment applied to mass spectrometry type gas leak detector |
| FR2770295B1 (en) * | 1997-10-23 | 1999-11-26 | Gec Alsthom T & D Sa | DENSITY SENSOR FOR MONITORING LEAKAGE RATE OF AN ELECTRICAL EQUIPMENT HOUSING WITH IMPROVED RELIABILITY |
| JP4671462B2 (en) * | 2000-02-22 | 2011-04-20 | パナソニック株式会社 | Airtight inspection method for nickel metal hydride secondary battery |
| CN202304897U (en) * | 2011-11-07 | 2012-07-04 | 福建亿榕信息技术有限公司 | On-line monitoring system for SF6 electrical equipment |
| CN103175659B (en) * | 2013-02-04 | 2015-05-27 | 李连清 | Technological method for testing natural gas cylinders |
| CN203444919U (en) * | 2013-11-15 | 2014-02-19 | 国网山东省电力公司青岛供电公司 | Vacuum oiling and detecting system for transformer |
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Effective date of registration: 20171130 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: State Grid Fujian Electric Power Co., Ltd. Patentee after: State Grid Corporation of China Co-patentee after: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. Co-patentee after: Economic technology academy of State Grid Fujian Electric Power Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: State Grid Fujian Electric Power Co., Ltd. Patentee before: State Grid Corporation of China Co-patentee before: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. |
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