CN109238584A - Dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage - Google Patents
Dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage Download PDFInfo
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- CN109238584A CN109238584A CN201811098512.0A CN201811098512A CN109238584A CN 109238584 A CN109238584 A CN 109238584A CN 201811098512 A CN201811098512 A CN 201811098512A CN 109238584 A CN109238584 A CN 109238584A
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- Prior art keywords
- dry air
- gas
- nitrogen
- filled
- switchgear
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/045—Details of casing, e.g. gas tightness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage, it overcomes prior art needs and the inert gas being uniformly used in mixed way is added in dry air, the problem of detecting inconvenience and will affect test result stability, it is characterized in for dry air or nitrogen being filled into inflatable insulation switchgear, CO in the dry air being filled with2Levels≤10ppm；CO in the nitrogen being filled with2Levels≤0.01ppm, utilize CO2Concentration detector is to the CO around inflatable insulation switchgear sealing surface2Concentration carries out searching, the CO around sealing surface2CO in concentration and the dry air or nitrogen that are filled with2When concentration is close, it is determined as that beneficial effect is not need to be mixed into other inert gases in inflatable insulation switchgear in advance, does not influence the purity and insulation performance of dry air or nitrogen in switchgear herein for leakage point, use and detect stability that is all very convenient, and improving test result.
Description
Technical field
The invention belongs to high voltage electrical apparatus technical fields, in particular to dry air or the leakage of nitrogen gas insulating switchgear gas
Leak hunting method.
Background technique
Traditional SF6Inflatable insulation switchgear is the capital equipment of transmission & distribution electrical domain, is risen in entire electrical power trans mission/distribution system
Very important effect, due to SF6Gas is greenhouse gases, be can cause environmental pollution, in order to avoid causing dirt to environment
Dye, gradually appeared using dry air or nitrogen as the inflatable insulation switchgear of dielectric, but use dry air or
When nitrogen gas insulating switchgear, once there is dry air or helium leak, it is extremely difficult to the searching of leakage point.The prior art
In, to the leak hunting method that dry air or nitrogen gas insulating switchgear gas leak be added in dry air or nitrogen it is micro
The inert gas of leak detection, such as SF6Or helium, but in use, it needs in advance in the dry air or nitrogen being filled with
Be added the inert gas that is uniformly used in mixed way, and it needs to be determined that its concentration, therefore, it is very inconvenient to use, such as application No. is
A kind of gas leak detection method for dry air insulation in combined electric appliance of the disclosure of the invention of CN201510318043.9, group
It closes in electric appliance and SF is replaced using dry gas6Gas is filled with the inertia of 0.5%~1.5% volume ratio in the dry gas
The leakage orientation problem of dry air insulation in combined electric appliance can be realized using existing infrared imaging leak hunting technology for gas.It should
Inventing defect existing for the technical solution used is exactly to need to be filled with inert gas in combined electrical apparatus in advance, will affect group in this way
The purity and insulation performance of dry air or nitrogen in electric appliance are closed, further, since inert gas performance is unstable, also influences test
As a result stability.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortage of prior art place and defect, providing does not influence to inflate
The purity and insulation performance of dry air or nitrogen in insulated switching installation, and the dry empty of test result stability can be improved
Gas or the leak hunting method of nitrogen gas insulating switchgear gas leakage.
The technical solution adopted by the present invention the following steps are included:
Step 1, it inflates: the dry air that 79% industrial high pure nitrogen is mixed with 21% industrial high purity oxygen gas or 100% industry
High pure nitrogen is filled into inflatable insulation switchgear as dielectric；
Step 2, searching: using gas concentration lwevel detector to the carbon dioxide around inflatable insulation switchgear sealing surface
Concentration carries out searching；
Step 3, judge: gas concentration lwevel around inflatable insulation switchgear sealing surface and the dry air being filled with or
When gas concentration lwevel in nitrogen is close, it is determined as herein for leakage point；
Step 4, it marks: leakage point label is carried out to leakage point.
Be filled into described in step 1 gas concentration lwevel content in the dry air in inflatable insulation switchgear≤
10ppm, lower than the levels of the carbon dioxide in atmosphere；
Gas concentration lwevel content≤the 0.01ppm being filled into the nitrogen in inflatable insulation switchgear described in step 1 is low
The levels of carbon dioxide in atmosphere.
Compared with prior art, present invention has the advantages that not needing to be mixed into inflatable insulation switchgear in advance other
Inert gas, therefore do not influence the purity and insulation performance of dry air or nitrogen in inflatable insulation switchgear, and use and
Detection leakage part is very convenient, since the industrial high pure nitrogen using 79% is mixed with 21% industrial high purity oxygen gas as dry air
Or insulated using 100% industrial high pure nitrogen to inflatable insulation switchgear, it is filled into dry in inflatable insulation switchgear
Gas concentration lwevel content≤10ppm in dry air, lower than the levels of the carbon dioxide in atmosphere；Or it is filled into
Gas concentration lwevel content≤0.01ppm in nitrogen in inflatable insulation switchgear, lower than the carbon dioxide in atmosphere
Levels, and the CO in atmosphere2(carbon dioxide) content is exhausted by the dry switch of test or nitrogen generally in 400ppm or so
CO at leakage point around edge switchgear sealing surface2The concentration of (carbon dioxide) can determine that dry air or nitrogen gas insulating switch
The leakage situation of equipment, and improve the stability of test result.
Specific embodiment
Specific embodiment 1
It hunts leak to the leakage of dry air insulated switching installation gas, which uses following steps:
Step 1, inflate: the dry air that 79% industrial high pure nitrogen is mixed with 21% industrial high purity oxygen gas is as insulation
Medium is filled into inflatable insulation switchgear, wherein CO2(carbon dioxide) levels be 8ppm,
Step 2, searching: using gas concentration lwevel detector to the CO2(dioxy around inflatable insulation switchgear sealing surface
Change carbon) concentration progress searching；
Step 3, judge: the CO2(carbon dioxide around inflatable insulation switchgear sealing surface) concentration be less than 10ppm when,
With the CO2(carbon dioxide in the dry air that is filled with) gas concentration lwevel of gas is close, that is, it can determine that herein as leakage point；
Step 4, it marks: leakage point label is carried out to leakage point, be that subsequent maintenance is spare.
The above method especially suitable for equipment install after leak detection, under equipment working state, it is possible to use this method into
Row leak detection, since the industrial high pure nitrogen for being filled with 79% in inflatable insulation switchgear is mixed with 21% industrial high purity oxygen gas
Dry air, it is convenient to omit step 1.
Specific embodiment 2
It hunts leak to the leakage of nitrogen gas insulating switchgear gas, which uses following steps:
Step 1, it inflates: being filled into inflatable insulation switchgear using 100% industrial high pure nitrogen as dielectric, wherein
Gas concentration lwevel content≤0.01ppm；
Step 2, searching: using gas concentration lwevel detector to the CO2(dioxy around inflatable insulation switchgear sealing surface
Change carbon) concentration progress searching；
Step 3, judge: the CO2(carbon dioxide around inflatable insulation switchgear sealing surface) concentration≤0.01ppm when, with
CO2(carbon dioxide in the industrial high pure nitrogen being filled with) concentration it is close, that is, can determine that herein as leakage point；
Step 4, it marks: leakage point label is carried out to leakage point, be that subsequent maintenance is spare.
The above method especially suitable for equipment install after leak detection, under equipment working state, it is possible to use this method into
Row leak detection, due to being filled with industrial high pure nitrogen in inflatable insulation switchgear, it is convenient to omit step 1.
Claims (3)
1. dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage, it is characterised in that take following steps:
Step 1, it inflates: dry air that 79% industrial high pure nitrogen is mixed with 21% industrial high purity oxygen gas or 100%
Industrial high pure nitrogen is filled into inflatable insulation switchgear as dielectric；
Step 2, searching: dense to the carbon dioxide around inflatable insulation switchgear sealing surface using gas concentration lwevel detector
Degree carries out searching；
Step 3, judge: gas concentration lwevel around inflatable insulation switchgear sealing surface and the dry air being filled with or
When gas concentration lwevel in industrial high pure nitrogen is close, it is determined as herein for leakage point;
Step 4, it marks: leakage point label is carried out to leakage point.
2. the leak hunting method of dry air insulated switching installation gas leakage according to claim 1, which is characterized in that institute
Gas concentration lwevel content≤10ppm in the dry air being filled into inflatable insulation switchgear is stated, lower than in atmosphere
The levels of carbon dioxide.
3. the leak hunting method of dry air insulated switching installation gas leakage according to claim 1, which is characterized in that institute
Gas concentration lwevel content≤0.01ppm in the industrial high pure nitrogen being filled into inflatable insulation switchgear is stated, lower than big
The levels of carbon dioxide in gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811098512.0A CN109238584A (en) | 2018-09-20 | 2018-09-20 | Dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811098512.0A CN109238584A (en) | 2018-09-20 | 2018-09-20 | Dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109238584A true CN109238584A (en) | 2019-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811098512.0A Pending CN109238584A (en) | 2018-09-20 | 2018-09-20 | Dry air or the leak hunting method of nitrogen gas insulating switchgear gas leakage |
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| CN (1) | CN109238584A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141462A (en) * | 2020-01-03 | 2020-05-12 | 云南电网有限责任公司电力科学研究院 | Gas leakage detection method and device for switch cabinet |
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| CN111141462A (en) * | 2020-01-03 | 2020-05-12 | 云南电网有限责任公司电力科学研究院 | Gas leakage detection method and device for switch cabinet |
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Application publication date: 20190118 |