CN109856510A - A kind of lookup method of inter-turn insulation defect of dry hollow reactor position - Google Patents
A kind of lookup method of inter-turn insulation defect of dry hollow reactor position Download PDFInfo
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Abstract
The invention discloses a kind of lookup methods of inter-turn insulation defect of dry hollow reactor position, on the basis for following existing electrical test standard, and the test form that Without wishing is single, also the bulk testing result that separate unit does anti-equipment is not only relied only on, but the test result according to previous step, the pilot project that guidance should select in next step, according to anti-entirety is done with the presence or absence of inter-turn insulation defect, defect in which encapsulating, the lookup logic of defect specific location (smolder position), gradually successively time the position of inter-turn insulation defect is systematically determined.Meanwhile this method is not merely suitable for the dry lookup for resisting single defective locations, experiment process equally meets the lookup of many places defective locations.
Description
Technical field
The present invention relates to high voltage and insulation technology fields, more particularly to inter-turn insulation defect of dry hollow reactor position
The lookup method set.
Background technique
Dry-type air-core reactor is generally made of several to more than ten encapsulating parallel connection, each encapsulating is again by multiply electromagnetic wire
Parallel coiling forms, i.e., the electric topology of one dry-type air-core reactor equipment is the reactance coil of a thousands of circles.When
A few circles of dry-type air-core reactor or tens circle coils occur or there are the routines that when insulation defect, scene is carried out at present
Electrical test is difficult to determine that it, with the presence or absence of inter-turn insulation defect, therefore with the development and expansion of apparatus insulated defect, is often led
Cause the generation of dry-type air-core reactor equipment firing accident.After turn-to-turn short circuit occurs for dry-type air-core reactor, in short-circuited conducting sleeve
Electric current is very big, can reach the several times of normal operating current under extreme case, thus easily cause in a few seconds coil it is on fire, from
It burns.The cause of accident as caused by inter-turn insulation defect accounts for the 90% of the total cause of accident of dry-type air-core reactor, if cannot be timely
It was found that inter-turn insulation defect, dry-type air-core reactor fire casualty baneful influence and economic loss caused by substation then can not
Estimate.
Turn-to-turn overvoltage experimental rig based on high-frequency impulse succusion, using power electronic devices IGBT instead of tradition
Ball-gap discharge gap, the safety and reliability of device significantly promotes.Therefore, turn-to-turn overvoltage is tested and is drawn by laboratory
Entering to electric field, inter-turn insulation defect of dry hollow reactor diagnosis aspect plays the role of should not be underestimated at the scene,
It solves in the fortune on-site diagnosis technical problem of inter-turn insulation defect of dry hollow reactor, greatly reduces dry-type hollow reactance
Device such as catches fire at the generations of events.
But tested dry-type air-core reactor only is determined only by the turn-to-turn overvoltage experimental rig of high-frequency impulse succusion
Be with the presence or absence of inter-turn insulation defect it is far from being enough, only after the specific location of apparent inter-turn insulation defect defect, by
The mode of dry-type air-core reactor ontology dismantling, could fundamentally determine, which causes dry-type air-core reactor turn-to-turn insulation occur, lacks
Sunken basic reason, and then could propose to improve equipment from design, manufacture and O&M of dry-type air-core reactor equipment etc.
The quality of production and stable effective ways.
Therefore need to provide a kind of lookup method of inter-turn insulation defect of dry hollow reactor position to solve existing skill
The problem of art.
Summary of the invention
The invention discloses a kind of lookup methods of inter-turn insulation defect of dry hollow reactor position, which is characterized in that
The lookup method the following steps are included:
Step 1: live turn-to-turn overvoltage test is carried out, determines that dry-type air-core reactor whether there is inter-turn insulation defect,
If obvious offset (1094.6 figure of GB/T G.1 in the judgement criterion that provides) occurs for the phase of high and low pressure test waveform, show
There are inter-turn insulation defects for tested dry-type air-core reactor, step 2 are executed, if the phase of high and low pressure test waveform does not occur
Offset, dry-type air-core reactor zero defect terminate to execute the lookup method；
Step 2: the dielectric loss value of dry-type air-core reactor, the dielectric loss value that will be measured under Current Temperatures are measured under rated current
Convert into that (the 6th part of GB/T 1094.6-2011 power transformer: the 7.8.1 articles of reactor: measured value is answered to 75 DEG C of reference temperature
It is adapted under rated current and reference temperature), calculating deviation is compared with factory loss test value；
Step 3: the test of encapsulated layer D.C. resistance test value, and compared with design theory value, calculate the deviation of the two
Value, it is no to then follow the steps 4 if encapsulated layer D.C. resistance test value deviation, which is greater than ± 5%, executes step 8；
Step 4: determining that problem is encapsulated using encapsulating loss test, measurement encapsulating loss value will current temperature under rated current
The lower encapsulating loss value measured of degree is converted into 75 DEG C of reference temperature (with described in step 2), is compared with factory loss test value
Deviation is calculated, it is no to then follow the steps 5 if encapsulating dielectric loss value deviation, which is greater than ± 5%, executes step 8；
Step 5: accelerating turn-to-turn insulation to deteriorate using electric current is applied outside；
Step 6: reducing applied voltage value is zero, measures the inductance value of dry-type air-core reactor, is carried out with factory test value
Comparison, it is no to then follow the steps 5 if measured inductance value and factory test value deviation, which are greater than 10%, executes step 7；
Step 7: measuring dry-type air-core reactor dielectric loss value and encapsulating loss value under rated current again, and dry type is empty
Core device dielectric loss value and encapsulating loss value are converted into 75 DEG C of reference temperature (with described in step 2), with the dry-type hollow in step 2
Encapsulating loss value in reactor dielectric loss value and step 4 compares, if executing step 8 without defect, otherwise determines defect
The problem of existing encapsulating position, dismounting has determined that existing defects, encapsulates and executes step 5；
Step 8: carrying out temperature rise test, increase applied voltage value, until the outer current value of applying of dry-type air-core reactor can not
Until raising, during temperature rise test, smolders position according to infrared thermal imaging temperature profile and its calcination, determine defect tool
Body position；
Step 9: dismantling problem encapsulating determines inter-turn insulation defect, so as to its causes of defects of subsequent analysis.
Preferably, the step 1 is carried out described existing using the turn-to-turn overvoltage experimental rig based on high-frequency impulse succusion
Field turn-to-turn overvoltage test.
Preferably, the step 5 quickly increases applied voltage value, applies current value outside greater than after rated current, holding should
Test current value is constant.
Preferably, the step 5 test current value retention time is lacked by being tested dry-type air-core reactor turn-to-turn insulation
Severity determines that inter-turn insulation defect is more serious, outer to apply that current value is lower, and application time is shorter.
Preferably, the step 7 also judges whether overcurrent test accelerates the deterioration progress of other small insulation defects, such as
Fruit finds other small insulation defects, illustrates to remove at inter-turn insulation defect position more than one and have determined that asking for existing defects
Topic is encapsulated and executes step 5.
Preferably, step 8 temperature rise test determines defective bit according to infrared thermal imaging temperature profile during test
It sets, which is that step 9 encapsulating dismantling determines dismantling position, and during test, several anti-a certain encapsulatings spontaneous combustion occur and smolder
Phenomenon, the position that smolders just are specific location where defect.
The lookup method of inter-turn insulation defect of dry hollow reactor position disclosed by the invention has the advantages that
1. the turn-to-turn overvoltage test based on high-frequency impulse succusion can qualitatively judge dry anti-with the presence or absence of turn-to-turn insulation
Defect, but cause to do it is anti-the reason of inter-turn insulation defect occur very much, be related to equipment part and design improper, construction and installation or weldering
Position is not received, the various aspects such as stress release in operational process, therefore the specific location of the clearly dry anti-inter-turn insulation defect of the present invention
Afterwards, causes of defects is probed into according to the shape characteristic of dielectric, improves and does the anti-equipment quality of production and stable.
2. the present invention accelerates by turn-to-turn overvoltage, dry wear resistant, encapsulated layer D.C. resistance, encapsulating loss, overcurrent, electricity
The testing experiments such as sensibility reciprocal and temperature rise, the mode of Ji Gankang apparatus body dismantling, it is exhausted to propose a kind of dry-type air-core reactor turn-to-turn
The method that edge defective locations are searched.
3. the present invention is on the basis for following existing electrical test standard, and the test form that Without wishing is single,
It not only relies only on separate unit and does the bulk testing of anti-equipment as a result, but the test result according to previous step, guidance in next step should
Which encapsulating, defect specific location the pilot project of selection whether there is inter-turn insulation defect, defect according to anti-entirety is done
The lookup logic of (smolder position), it is gradually successively secondary that the position of inter-turn insulation defect has systematically been determined.Meanwhile this method is not
Only it is suitable for the dry lookup for resisting single defective locations, experiment process equally meets the lookup of many places defective locations.
4. power industry correlation practitioner can test procedure according to the present invention accurately find and do anti-turn-to-turn insulation
Defective locations.And then herein on basis, preferably carry out equipment design, manufacturing process, material properties and its modification etc.
Research, inter-turn insulation defect is occurred without reason from source (due to the missing of method, to be currently difficult to the clearly dry anti-tool to catch fire
The body origin cause of formation) caused by fire event chop off, provide basic guarantee to do anti-equipment safety stable operation.
Detailed description of the invention
Fig. 1 is the lookup method flow chart of inter-turn insulation defect of dry hollow reactor position.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, the specific step of the technical method of the method for inter-turn insulation defect of dry hollow reactor location lookup
It is rapid:
1) turn-to-turn overvoltage is tested.The dry anti-qualitative judgement with the presence or absence of inter-turn insulation defect.Using based on high-frequency impulse
The turn-to-turn overvoltage experimental rig of succusion, according to the 6th part of GB/T 1094.6-2011 power transformer: reactor is wanted
It asks, carries out the tested turn-to-turn overvoltage test done and resisted, judge it with the presence or absence of inter-turn insulation defect.Such as high and low pressure test waveform
Phase occur obvious offset (according to 1094.6 figure of GB/T G.1 in the judgement criterion that provides), show tested to do that anti-there are turn-to-turns
Insulation defect that is, not over test then needs that following tests is combined to determine defective locations；If the phase of high and low pressure test waveform
Position does not occur, does anti-zero defect, can continue to run.
2) wear resistant test is done.Anti- dielectric loss value (environment temperature when record measurement is done in measurement test under rated current
Degree), convert into measured value at this temperature to the factory loss test value pair to 75 DEG C of reference temperature, when with 75 DEG C of reference temperature
Than calculating the deviation of the two, and it is spare to record the data.
3) encapsulated layer resistance test.Using layer D.C. resistance test mode, searches and do anti-encapsulating there are insulation defect.It tears open
The tested electromagnetic wire for doing anti-welding and upper and lower star arm is solved, encapsulating, the layer-by-layer test for carrying out DC resistance, i.e. encapsulated layer are straight one by one
Leakage resistance test.Resulting each layer will be measured and directly hinder measured value and the comparison of its Theoretical Design value, calculate the deviation of the two to sentence
Determine problem encapsulating position.Anti- Defect Search experience is done in conjunction with more, general layer DC resistance deviation is greater than ± 5%, then recognizes
There should be inter-turn insulation defect for the corresponding encapsulating of the test value.
4) loss test is encapsulated.Determine that problem is encapsulated using encapsulating loss test.The encapsulating measurement one by one under rated current
(environment temperature when record measurement) is lost in it, converts into measured value at this temperature to the factory to 75 DEG C (with 2), when with 75 DEG C
The comparison of loss test value, the deviation for calculating the two come decision problem encapsulating position.Anti- Defect Search experience is done in conjunction with more,
General encapsulating dielectric loss value deviation is greater than ± 5%, then it is assumed that there may be inter-turn insulation defects for the encapsulating.At this point, binder course direct current
Resistance value can which specific encapsulating of primitive decision defect presence.
In addition, if layer D.C. resistance test value deviation is larger (being greater than ± 5%), then can determine that after step 3) testing experiment
Problem encapsulates position, otherwise need to determine again by step 4) test.
If encapsulating dielectric loss value deviation is also smaller in step 4) (being not more than ± 5%), need to be by the overcurrent of step 5)
Test accelerates the deterioration process of turn-to-turn insulation.
5) overcurrent accelerated deterioration process.Turn-to-turn insulation is accelerated to deteriorate using constant current long duration of action.With faster
Speed increases applied voltage value, applies current value outside greater than after rated current, keeps the test current value for a period of time.This is outer to apply
Current value suggestion is 1.1-2.0 times of load current value, test of many times the result shows that, the outer current value of applying is by doing the tight of anti-defect
Weight degree determines, is artificially difficult to control specific a certain numerical value；Inter-turn insulation defect is more serious, and outer current value of applying is lower,
Can application time it is shorter.
It is worth noting that the setting valve of dry-type air-core reactor overcurrent protection is 1.5-2.0 times of its rated current, it should
External phase fault and single-phase reactor first and last terminal shortcircuit can be effectively protected in setting valve；I.e. in actual motion, 1.5-2.0 times
The overcurrent impact of rated current should not result in insulation degradation problem.That is: the electric parameter for such as doing anti-equipment is changed, then is said
It is bright to do anti-equipment and itself there is defect.
6) anti-inductance value test is done.Reducing applied voltage value is zero, measures and does anti-inductance value, and in factory test value ratio
It is right, if inductance value shown in measuring instrument fluctuates always when test, be difficult to stablize or the decline of measured inductance value is obvious (such as
As many as decline 10%), it can determine that overcurrent impact test increases the degradation of original insulation defect；Also other may be promoted
The accelerated deterioration of tiny flaw causes its insulation defect to expose ahead of time.If reactance value variation is not very obvious, then repeatedly step 5) is straight
There is the step 6) situation to reactance value.
7) anti-and encapsulating loss is done to test again.Dry anti-and encapsulating loss value is measured under rated current again, will be surveyed
Examination value is converted into after 75 DEG C of reference temperature, is compared with 2) doing wear resistant test value or 4) encapsulating loss measurement value, is utilized the two
Deviation determines the existing encapsulating position of defect (which encapsulating be particularly located at), while can determine whether overcurrent test accelerates
The deterioration progress of other small insulation defects.
8) temperature rise test.Increase applied voltage value, to it is dry resist outer apply until current value can not increase again.Due to setting at this time
It is standby to be lost higher, electric current is applied outside to be difficult to increase, so that (or close to the value) can carry out under raised maximum current effect
Temperature rise test.After testing a period of time, generally several minutes, the bit test that can bow by infrared thermal imager does anti-Temperature Distribution
Situation, to determine defective locations according to infrared thermal imaging temperature profile.It is several anti-a certain to encapsulate out during test
Existing spontaneous combustion smoke event, need to think termination test in time, to prevent firing accident, while can uniquely determine defective locations.
9) dismantling problem encapsulating, determines defective locations.Smoldered using in temperature rise test position to side bus as cleavage
It sets, whether the color for observing the fiberglass insulation for the position that smolders, which becomes grey, brown or dark brown, (is clearly distinguishable from glass
Glass fibrous layer appearance face color), which is just defective locations.Outside glass fibrous covering is peeled off, observation glass fibre is exhausted
The state of edge side internal glass fibers cloth and electromagnetic wire, if the abnormal conditions such as wet, electromagnetic wire scorification fracture that there are fiber cloths,
To probe into the origin cause of formation for doing anti-equipment inter-turn insulation defect in next step.
10) repetition of multiple defective locations is searched.Dismounting has determined that the encapsulating of the problem of defective locations, repeats step 5) -9)
?.
In one embodiment, the process of inter-turn insulation defect of dry hollow reactor location lookup method are as follows:
1) turn-to-turn overvoltage is tested.According to GB/T1094.6 annex G, test is applied outside by the test of turn-to-turn overvoltage of 160kV
Voltage value, 85kV do that anti-to have carried out the turn-to-turn based on high-frequency impulse succusion excessively electric to certain as low pressure rating test voltage value
Pressure test.High and low pressure waveform phase obviously deviates, and shows that this does that anti-there are inter-turn insulation defects.
2) wear resistant test is done.Certain dry loss measurement value resisted under rated current is 8.81kW, and delivery test value is
7.82kW, deviation percent 12.7.The dry wear resistant of this obviously increases, it was demonstrated that there are inter-turn insulation defects for it.
3) D.C. resistance is tested.Certain does anti-whole D.C. resistance test result no abnormality seen.Disassemble this do it is anti-welding with it is upper
The electromagnetic wire of lower star arm is encapsulated one by one, successively tests DC resistance, and the Theoretical Design value and measured value that each layer directly hinders are shown in Table 1；
In table, encapsulating number is respectively 1,2,3 and 4 from the inside to the outside.
1 D.C. resistance test result of table
In table 1, except 2 the 1st layers of encapsulating (encapsulating innermost layer) measured value is infinitely great, 1 the 1st layer of measured deviation of encapsulating is -6.1%
Outside, remaining each layer directly hinders maximum deviation no more than -5.3%.Accordingly, judge that there are insulation defects for No. 2 encapsulating innermost layers.No. 1 packet
Seal it is doubtful there are insulation defects, since deviation is smaller, need further to test auxiliary judgement.
4) overcurrent accelerated deterioration process.To find out defective locations, accelerate turn-to-turn by using constant current long duration of action
The method of insulation degradation.Raising applied voltage value faster applies current value outside and increases to (about 1.2 times of specified electricity after 200A
Stream), experimental rig tripping.Boost again after combined floodgate, apply outside test current value can not value added to rated value.Decompression measurement is dry anti-
Inductance value, when factory compared with the inductance value of 55mH, as many as measured value decline 10%, and reactance values fluctuate always when measurement.
According to above-mentioned experimental phenomena, thus it is speculated that overcurrent impacts the degradation that may increase original insulation defect；Also it may be promoted
The accelerated deterioration of remaining tiny flaw causes its insulation defect to expose ahead of time.
5) loss test second test.Loss measurement value is 37.7kW under rated current, and loss increases 4.3 times.Speculate
This, which does to resist, have the small insulation defect in many places, and overcurrent tests the deterioration progress for accelerating such defect.
6) temperature rise test positions.Since to do wear resistant higher for this, electric current is applied outside and is difficult to increase, so in the 89A function of current
Under carried out temperature rise test.After applying the function of current 3 minutes outside, No. 1 encapsulating is smoldered.For guarantee test safety, decompression, artificial termination
Test.Infrared thermal imaging temperature profile shows, occurs height temperate zone at No. 1 encapsulating upper end about 15cm, 48.8 DEG C of maximum temperature,
Its Temperature Distribution meets the temperature distributing characteristic after turn-to-turn short circuit.
7) smoldered using in temperature rise test position to side bus as cutting position.After disassembling No. 1 encapsulating, it is seen that defective bit
It sets at distance encapsulating upper end 15cm, after peeling off outside glass fibrous covering, more electromagnetic wire scorification fractures.In No. 1 encapsulating
There are the macroscopic fine gaps in many places for wall.No. 2 encapsulatings are cut to, at distance encapsulating upper end about 30cm, encapsulate inner wall
Locating insulating layer is in Dark grey.It removes at this after insulating layer, electromagnetic wire and fiberglass insulation inner surface have obvious electric discharge carbon
Change trace.Moreover, the glass fabric that contact surface is coated is detached from electromagnetic wire, finger touching has moist feeling.3, No. 4 encapsulatings
No abnormality seen after dismantling.
In conjunction with the shape characteristic after 1, No. 2 encapsulating dismantling, known to analysis: this is dry to resist in glass fiber transverse direction winding process
In, since glass fiber cloth infiltrating is poor, it is difficult to permeate entirety with glass fiber, cause its axial tear-proof energy
The phenomenon that power is insufficient, fiberglass insulation cracking occurs and removes with electromagnetic wire.Because of the limitation of material and technique, do anti-
Inner surface is encapsulated after putting into operation and gradually appears the different degrees of cracking phenomena in many places, leads to insulation degradation, Jin Eryin after operation dampness
Inter-turn insulation defect or insulation potential problem are sent out.
Finally it is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, the essence for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (6)
1. a kind of lookup method of inter-turn insulation defect of dry hollow reactor position, which is characterized in that the lookup method packet
Include following steps:
Step 1: live turn-to-turn overvoltage test is carried out, determines that dry-type air-core reactor whether there is inter-turn insulation defect, if
Obvious offset occurs for the phase of high and low pressure test waveform, and showing tested dry-type air-core reactor, there are inter-turn insulation defects, executes
Step 2, if the phase of high and low pressure test waveform does not shift, dry-type air-core reactor zero defect terminates to look into described in execution
Look for method；
Step 2: measuring the dielectric loss value of dry-type air-core reactor under rated current, the dielectric loss value measured under Current Temperatures is converted into
To 75 DEG C of reference temperature, calculating deviation is compared with factory loss test value；
Step 3: the test of encapsulated layer D.C. resistance test value, and compared with design theory value, the deviation of the two is calculated, such as
Fruit encapsulated layer D.C. resistance test value deviation is greater than ± 5% and executes step 8, no to then follow the steps 4；
Step 4: determining that problem is encapsulated using encapsulating loss test, measurement encapsulating loss value will be under Current Temperatures under rated current
The encapsulating loss value of measurement is converted into 75 DEG C of reference temperature, calculating deviation is compared with factory loss test value, if packet
It seals dielectric loss value deviation and is greater than ± 5% execution step 8, it is no to then follow the steps 5；
Step 5: accelerating turn-to-turn insulation to deteriorate using electric current is applied outside；
Step 6: reducing applied voltage value is zero, measures the inductance value of dry-type air-core reactor, is compared with factory test value,
If measured inductance value and factory test value deviation, which are greater than 10%, executes step 7, no to then follow the steps 5；
Step 7: measuring dry-type air-core reactor dielectric loss value and encapsulating loss value under rated current again, and dry-type hollow is electric
Anti- device dielectric loss value and encapsulating loss value are converted into 75 DEG C of reference temperature, with the dry-type air-core reactor dielectric loss value and step in step 2
Encapsulating loss value in rapid 4 compares, if executing step 8 without defect, otherwise determines that defect is existing and encapsulates position, tear open
Except being encapsulated the problem of having determined that existing defects and execute step 5；
Step 8: carrying out temperature rise test, increase applied voltage value, until the outer current value of applying of dry-type air-core reactor can not increase
Until, during temperature rise test, smolders position according to infrared thermal imaging temperature profile and its calcination, determine the specific position of defect
It sets；
Step 9: dismantling problem encapsulating determines inter-turn insulation defect, so as to its causes of defects of subsequent analysis.
2. the lookup method of inter-turn insulation defect of dry hollow reactor position according to claim 1, it is characterised in that:
The step 1 carries out the live turn-to-turn overvoltage using the turn-to-turn overvoltage experimental rig based on high-frequency impulse succusion and tries
It tests.
3. the lookup method of inter-turn insulation defect of dry hollow reactor position according to claim 1, it is characterised in that:
The step 5 quickly increases applied voltage value, applies current value outside greater than after rated current, keeps the test current value constant,
The outer load current value applied electric current and be 1.1-2.0 times.
4. the lookup method of inter-turn insulation defect of dry hollow reactor position according to claim 3, it is characterised in that:
The step 5 test current value retention time determines by being tested the scarce severity of dry-type air-core reactor turn-to-turn insulation, circle
Between insulation defect it is more serious, it is outer to apply that current value is lower, and application time is shorter.
5. the lookup method of inter-turn insulation defect of dry hollow reactor position according to claim 1, it is characterised in that:
The step 7 also judges whether overcurrent test accelerates the deterioration progress of other small insulation defects, if it find that other small
Insulation defect illustrates at inter-turn insulation defect position more than one, need to remove the problem of having determined that existing defects and encapsulate and execute step
Rapid 5.
6. the lookup method of inter-turn insulation defect of dry hollow reactor position according to claim 1, it is characterised in that:
Step 8 temperature rise test, determines defective locations according to infrared thermal imaging temperature profile during test, which is step
9 encapsulating dismantlings determine dismantling position, and during test, spontaneous combustion smoke event occur in several anti-a certain encapsulatings, smolder position just
For specific location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811585929.XA CN109856510B (en) | 2018-12-24 | 2018-12-24 | Method for searching turn-to-turn insulation defect position of dry-type air-core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811585929.XA CN109856510B (en) | 2018-12-24 | 2018-12-24 | Method for searching turn-to-turn insulation defect position of dry-type air-core reactor |
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| CN118091407A (en) * | 2024-04-23 | 2024-05-28 | 荣成市泰锞机械有限公司 | Method and device for testing insulation performance of engine stator |
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| CN117148214A (en) * | 2023-09-07 | 2023-12-01 | 哈尔滨理工大学 | Online monitoring method for turn-to-turn short circuit fault of dry hollow parallel reactor group of neutral point ungrounded system |
| CN117148214B (en) * | 2023-09-07 | 2024-03-19 | 哈尔滨理工大学 | An online monitoring method for inter-turn short circuit faults in dry-type air-core shunt reactor banks in ungrounded neutral point systems |
| CN118091407A (en) * | 2024-04-23 | 2024-05-28 | 荣成市泰锞机械有限公司 | Method and device for testing insulation performance of engine stator |
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