CN110425824A - The field treatment method that moisture in mutual inductor insulating layer can be dried - Google Patents
The field treatment method that moisture in mutual inductor insulating layer can be dried Download PDFInfo
- Publication number
- CN110425824A CN110425824A CN201910542110.3A CN201910542110A CN110425824A CN 110425824 A CN110425824 A CN 110425824A CN 201910542110 A CN201910542110 A CN 201910542110A CN 110425824 A CN110425824 A CN 110425824A
- Authority
- CN
- China
- Prior art keywords
- mutual inductor
- micro
- water content
- dried
- regulatory requirements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
- F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
Abstract
The invention discloses the field treatment methods that moisture in mutual inductor insulating layer can be dried in one kind, will test whether mutual inductor micro-water content exceeds regulatory requirements first, if exceeding regulatory requirements, service personnel carries out special marking to the mutual inductor to arouse attention；Then shorten the measurement period of the mutual inductor for carrying out special marking, and continue to carry out the mutual inductor micro-water content measurement after the label；Micro-water content analyzing and diagnosing is carried out to the mutual inductor after label again, when micro-water content exceeds regulatory requirements value certain multiple, carries out live decomposition product, the work of SF6 leak test；Had a power failure to the mutual inductor after label, vacuumized, being heated, being inflated, vacuum pumping again；After mutual inductor is dried and is put into operation again, persistently SF6 voltage transformer micro-water content is detected for a period of time, if micro-water content, which returns, restores normal, restore former normal measurement period.This method can at the scene can be dried the moisture in mutual inductor insulating layer without returning factory.
Description
Technical field
The present invention relates to mutual inductors to be dried field, in particular to one kind can carry out moisture in mutual inductor insulating layer
Dry field treatment method.
Background technique
SF6Gas-insulated voltage transformer is widely adopted because of its superior electric property.But inside voltage transformer
Dampness, electrical strength will be decreased obviously, and seriously affect equipment safety operation.Find SF successively in recent years6Mutual inductor moisture content
It has generally exceeded the standard.In the process of running, the excessive factor plus high pressure-temperature of humidity, is easy to cause steam and SF6Decomposition reaction produces
The raw extremely strong acidic materials of corrosivity, will seriously affect equipment internal metal parts and sealed insulating material performance in this way, cause
Apparatus insulated reduced performance shortens service life of equipment.Dry be not thorough of mutual inductor built-in electrical insulation is that micro-water content is caused to increase
The main reason for.SF6Voltage transformer body is made of core assembly, first winding and secondary winding etc..There are iron in iron core
The insulating materials such as cardboard, first winding and the prefabricated insulating paper cylinder of secondary winding are gripped, are thought in body insulation interlayer and insulation
There is a small amount of residual moisture in inside, after mutual inductor operation, the passage slow release of moisture at any time in insulating materials.
Currently, when there is SF6The method taken after voltage transformer micro-water content is exceeded is: 1) live ventilation processing, this
It is the mode generallyd use, this method is only capable of the moisture in dry gas, but can not dry the moisture in insulating layer；2) factory and office are returned
Reason, more thoroughly, but the period is long for this method ratio, at high cost, influences power off time.
Summary of the invention
To solve the above problems, the present invention adopts the following technical scheme that realization:
A kind of field treatment method that moisture in mutual inductor insulating layer can be dried, comprising the following steps:
S1, detection mutual inductor micro-water content whether exceed regulatory requirements, if exceed regulatory requirements, service personnel to the mutual inductor into
Row special marking is to arouse attention；
S2, the measurement period for shortening the mutual inductor for carrying out special marking, and the mutual inductor for continuing to carry out after the label is micro-
Water content measurement；
S3, micro-water content analyzing and diagnosing is carried out to the mutual inductor after label, when micro-water content exceeds regulatory requirements value certain multiple
When, carry out live decomposition product, SF6Leak test work, and execute step S4；
If analyzing and diagnosing result be restored to regulatory requirements value hereinafter, if restore former normal measurement period；
S4, had a power failure to the mutual inductor after label, vacuumize, heat, inflating, vacuum pumping again；
S5, after mutual inductor is dried and is put into operation, SF is persistently detected6At one section of voltage transformer micro-water content
Between, if micro-water content, which returns, restores normal, restore former normal measurement period；If micro-water content is exceeded again, then executes by step S4.
Preferably, regulatory requirements described in step S1 are that mutual inductor micro-water content is not more than 1000 μ L/L.
Preferably, the measurement period of the shortening mutual inductor for carrying out special marking described in step S2, and continue to carry out
Mutual inductor micro-water content measurement after the label includes:
It is primary that measurement in 1 year from before is once adjusted to every three months measurement；
If growth trend is still presented in the micro-water content in mutual inductor, further shortens the time, be then adjusted to monthly.
Preferably, certain multiple described in step S3 is that micro-water content exceeds 1.2 times of regulatory requirements value.
Preferably, the mutual inductor after pair label described in step S4 is had a power failure, is vacuumized, being heated, being inflated, vacuumizing behaviour again
Work includes:
S41, the mutual inductor to micro-water content beyond 1.2 times of regulatory requirements value have a power failure；
S42, tracheae and vacuum pump are then connected to the progress vacuum pumping of its inside；
S43, when vacuum degree reach 133Pa and it is following after, electric-heating belt is wrapped in mutual inductor periphery and mutual inductor is added
Heat, heating and temperature control is at 60 ~ 80 DEG C, heating time 12 ~ for 24 hours；
S44, after completing heating operation, dry nitrogen is filled with to mutual inductor and is rinsed, nitrogen gas purity 99.999% rinses
1-2 times；
S45, mutual inductor is vacuumized again；
S46, qualified SF is poured6Gas.
The present invention provides a set of clear, frame-type SF6The exceeded site disposal method plan of voltage transformer micro-water content
Slightly, the efficiency of decision-making and disposition effect of electric power operation maintenance personnel are greatly improved.Power department operation maintenance personnel is in discovery SF6Voltage
When mutual inductor micro-water content or too fast increase, SF can be carried out using the present invention in time6Voltage transformer micro-water content it is effective
Processing, to ensure SF6The safe operation of voltage transformer.Heating tape proposed by the present invention heats SF6Voltage transformer is micro-
The more traditional method of the exceeded method of water content, significant effect, processing is more thorough, after processing not repeatedly, there is extensive popularization to answer
With value.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application embodiment clearer, implement below in conjunction with the application
The technical solution in the application embodiment is clearly and completely described in mode, it is clear that described embodiment is
A part of embodiment of the application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
Art personnel every other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.Therefore, the detailed description of the presently filed embodiment provided in embodiment is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field
Those of ordinary skill's every other embodiment obtained without creative efforts belongs to the application guarantor
The range of shield.
A kind of field treatment method that moisture in mutual inductor insulating layer can be dried mainly includes following step
It is rapid:
Step 1: detection SF6Whether voltage transformer micro-water content exceeds regulatory requirements (such as in the operation of southern network planning range request not
Greater than 1000 μ L/L), if exceeding regulatory requirements, service personnel should carry out special marking to the mutual inductor to arouse attention.
In practical work, part SF is found6Voltage transformer still occurs after on-site conventional processing mode is repeatedly taken a breath
SF6The equipment of voltage transformer micro-water content over-standard phenomenon repeatedly is generally inferred as dry be not thorough of mutual inductor built-in electrical insulation and leads
It causes, such case is more suitable for being handled using this method.
Step 2: shortening the measurement period of the above-mentioned mutual inductor for carrying out special marking, and continue after carrying out the label
SF6The measurement of voltage transformer micro-water content.
For example, before this measurement period be it is annual, should be in O&M mode when carrying out special marking and after arouse attention
The appropriate measurement period shortened to the mutual inductor.Such as from before to be annually adjusted to per March primary, if in mutual inductor
Micro-water content growth trend is still presented, then further shorten the time, be at least adjusted to monthly.
Step 3: micro-water content analyzing and diagnosing being carried out to the mutual inductor after label, when micro-water content exceeds regulatory requirements value
At 1.2 times, live decomposition product, SF are carried out6Leak test work, and execute step 4；If analyzing and diagnosing result is restored to regulation and wants
After asking following, restore normal measurement period.
According to tracking and testing as a result, if micro-water content is greater than 1.2 times beyond regulatory requirements, it is recommended that carrying out live decomposition
Object, SF6Leak test when the overproof value of the decomposition product that notes abnormalities, is such as greater than 1 μ L/L or H2S according to southern network planning journey SO2 and is greater than 1 μ
When L/L or CO is greater than 300 μ L/L, then should have a power failure disposition immediately.Sometimes because environmental factor causes detection to be micro- water occur to contain
Measure it is exceeded, it is again back to normal after a period of time, at this moment should be restored to original normal measurement period.
Step 4: being had a power failure to mutual inductor, vacuumized, heated, inflated, vacuum pumping again.
Mutual inductor to micro-water content beyond 1.2 times of regulatory requirements value has a power failure；
Then tracheae and vacuum pump are connected, vacuum pumping is carried out to its inside；
When vacuum degree reach 133Pa and it is following after, electric-heating belt is wrapped in mutual inductor periphery and mutual inductor is heated, is added
Hot temperature control is at 60-80 DEG C.Electric-heating belt is a kind of band-type product that can use electric energy heating of in-built electrical heated filament,
It can purchase on the market, be not necessarily to special designing or processing.
The operation for vacuumizing and heating can make the moisture in insulating layer be easier to be discharged.Should persistently it add when heating
Heat, general heating time are 12h, if exceeded serious, such as reaching regulation value 2 times or more of micro-water content, heating can be extended
Time is to for 24 hours.It should be noted that SF6Voltage transformer some materials are resistant to maximum temperature no more than 85 DEG C, to ensure material
Expect service performance and higher treatment effeciency, heating temperature is no more than 80 DEG C when being heated.
After completing heating operation, dry nitrogen is filled with to mutual inductor and is rinsed, nitrogen gas purity can be rushed up to 99.999%
It washes 1-2 times；
Then mutual inductor is vacuumized again；
Finally pour qualified SF6Gas.
Step 5: after above-mentioned mutual inductor is dried and is put into operation, persistently detecting SF6The micro- water of voltage transformer
Content for a period of time, if micro-water content, which returns, restores normal, restores normal cycle；If micro-water content is exceeded again, held by step 4
Row.
After heating using electric-heating belt and vacuumize ventilation processing, SF is coped with6Voltage transformer carries out tracing detection, detection
Period suggests pressing 1 day, 4 days, 10 days, 30 days, 90 days, 365 days, if testing result restores normal week without the trend of rising appreciably
3 years phases are primary；If micro-water content is exceeded again during tracking, executed by step 4.
The present invention provides a set of clear, frame-type SF6The exceeded site disposal method plan of voltage transformer micro-water content
Slightly, the efficiency of decision-making and disposition effect of electric power operation maintenance personnel are greatly improved.Power department operation maintenance personnel is in discovery SF6Voltage
When mutual inductor micro-water content or too fast increase, SF can be carried out using the present invention in time6Voltage transformer micro-water content it is effective
Processing, to ensure SF6The safe operation of voltage transformer.Heating tape proposed by the present invention heats SF6Voltage transformer is micro-
The more traditional method of the exceeded method of water content, significant effect, processing is more thorough, after processing not repeatedly, there is extensive popularization to answer
With value.
Claims (5)
1. the field treatment method that moisture in mutual inductor insulating layer can be dried in one kind, which is characterized in that including following
Step:
S1, detection mutual inductor micro-water content whether exceed regulatory requirements, if exceed regulatory requirements, service personnel to the mutual inductor into
Row special marking is to arouse attention；
S2, the measurement period for shortening the mutual inductor for carrying out special marking, and the mutual inductor for continuing to carry out after the label is micro-
Water content measurement；
S3, micro-water content analyzing and diagnosing is carried out to the mutual inductor after label, when micro-water content exceeds regulatory requirements value certain multiple
When, carry out live decomposition product, SF6Leak test work, and execute step S4；
If analyzing and diagnosing result be restored to regulatory requirements value hereinafter, if restore former normal measurement period；
S4, had a power failure to the mutual inductor after label, vacuumize, heat, inflating, vacuum pumping again；
S5, after mutual inductor is dried and is put into operation, SF is persistently detected6Voltage transformer micro-water content for a period of time,
If micro-water content, which returns, restores normal, restore former normal measurement period；If micro-water content is exceeded again, then executes by step S4.
2. the field treatment method according to claim 1 that moisture in mutual inductor insulating layer can be dried, special
Sign is:
Regulatory requirements described in step S1 are that mutual inductor micro-water content is not more than 1000 μ L/L.
3. the field treatment method according to claim 1 that moisture in mutual inductor insulating layer can be dried, special
Sign is:
The measurement period of the shortening mutual inductor for carrying out special marking described in step S2, and continue to carry out mutual after the label
Sensor micro-water content measurement includes:
It is primary that measurement in 1 year from before is once adjusted to every three months measurement；
If growth trend is still presented in the micro-water content in mutual inductor, further shortens the time, be then adjusted to monthly.
4. the field treatment method according to claim 1 that moisture in mutual inductor insulating layer can be dried, special
Sign is:
Certain multiple described in step S3 is that micro-water content exceeds 1.2 times of regulatory requirements value.
5. the field treatment method according to claim 1 that moisture in mutual inductor insulating layer can be dried, special
Sign is:
Mutual inductor after pair label described in step S4 is had a power failure, is vacuumized, being heated, being inflated, vacuum pumping includes: again
S41, the mutual inductor to micro-water content beyond 1.2 times of regulatory requirements value have a power failure；
S42, tracheae and vacuum pump are then connected to the progress vacuum pumping of its inside；
S43, when vacuum degree reach 133Pa and it is following after, heating tape is wrapped in mutual inductor periphery and mutual inductor is heated,
Heating and temperature control is at 60 ~ 80 DEG C, heating time 12 ~ for 24 hours；
S44, after completing heating operation, dry nitrogen is filled with to mutual inductor and is rinsed, nitrogen gas purity 99.999% rinses
1-2 times；
S45, mutual inductor is vacuumized again；
S46, qualified SF is poured6Gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542110.3A CN110425824A (en) | 2019-06-21 | 2019-06-21 | The field treatment method that moisture in mutual inductor insulating layer can be dried |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910542110.3A CN110425824A (en) | 2019-06-21 | 2019-06-21 | The field treatment method that moisture in mutual inductor insulating layer can be dried |
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| CN110425824A true CN110425824A (en) | 2019-11-08 |
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| CN201910542110.3A Pending CN110425824A (en) | 2019-06-21 | 2019-06-21 | The field treatment method that moisture in mutual inductor insulating layer can be dried |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811428A (en) * | 2022-04-26 | 2022-07-29 | 四川圣达水电开发有限公司 | Micro-water standard exceeding treatment method for 220KV GIS air chamber |
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2019
- 2019-06-21 CN CN201910542110.3A patent/CN110425824A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0408168A1 (en) * | 1989-07-10 | 1991-01-16 | Daidousanso Co., Ltd. | Method of pretreating metallic works and method of nitriding steel |
| JPH09232151A (en) * | 1996-02-27 | 1997-09-05 | Meidensha Corp | Drying method for gas insulated transformer |
| CN105387342A (en) * | 2015-11-17 | 2016-03-09 | 国网新疆电力公司检修公司 | Treatment system for micro water of GIS air chamber |
| CN106123502A (en) * | 2016-06-16 | 2016-11-16 | 国网新疆电力公司检修公司 | 750 kilovolts of GIS excessive water content processing methods |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811428A (en) * | 2022-04-26 | 2022-07-29 | 四川圣达水电开发有限公司 | Micro-water standard exceeding treatment method for 220KV GIS air chamber |
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Application publication date: 20191108 |