CN105182204B - SF6The detection method and analoging detecting device of electrical device status - Google Patents
SF6The detection method and analoging detecting device of electrical device status Download PDFInfo
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- CN105182204B CN105182204B CN201510646464.4A CN201510646464A CN105182204B CN 105182204 B CN105182204 B CN 105182204B CN 201510646464 A CN201510646464 A CN 201510646464A CN 105182204 B CN105182204 B CN 105182204B
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Abstract
The present invention relates to a kind of SF6The detection method and analoging detecting device of electrical device status.The present invention proposes a kind of detection SF6The new marker CO of electrical device status2, can be used as gas marker and apply in detection SF6In electrical device status.By to SF after failure6Electrical equipment gas composition analysis, it was found that new gas marker CO2, by detecting SF6The CO of electrical equipment content2Concentration can effectively judge SF6The operating status of inside electric appliance, compared with traditional by detecting CF4、SO2、SOF2And SO2F2Equal gases marker, detection process is simpler, and result is sensitiveer, effective, reliability is high.
Description
Technical field
The present invention relates to electric fields, more particularly, to a kind of SF6The detection method and analog detection of electrical device status
Device.
Background technology
Sulfur hexafluoride (SF6) it is a kind of colourless, tasteless, nontoxic, non-ignitable, chemical property stabilizer pole conjunction at normal temperatures and pressures
At gas.SF6Molecule be single sulphur polyfluoro symmetrical structure, there is extremely strong electronegativity, to assign its excellent electrical isolation
And arc extinction performance.Currently, SF6As the dielectric of a new generation, it is widely used in high pressure, extra-high voltage electrical equipment.It fills
Fill SF6Electrical equipment (i.e. SF6Electrical equipment) floor space is few, running noises are small, and no fire hazard greatly improves electricity
The security reliability of gas equipment operation.
SF6Gas is under the action of overheat, electric arc, electric spark and corona discharge, it may occur that decomposes, decomposition product may be used also
It reacting with micro-moisture, electrode and the solid insulating material in equipment, product is more complicated, there is gaseous impurity, and such as four
Fluorocarbons (CF4), fluorination sulfonyl (SO2F2), fluorination thionyl (SOF2), sulfur dioxide (SO2) etc., also some solid impurities,
Such as aluminum fluoride (AlF3), tungsten fluoride (WF6) etc., specific decomposition approach is as follows：
For running electrical equipment, its equipment internal operation state relative difficulty is judged, SF is detected by analysis6Gas
The decomposition product of body is to judge SF6One strong means of inside electric appliance operating condition.In recent years, SF6CF in gas4
And SO2Equal decomposition products have been widely recognized as to be used for judging the marker of equipment internal operation state.CF4In SF6Production
Exist in technical process, needs to combine SO2Index is used together, and SO2Often acutely increase suddenly in actual motion equipment,
For operation maintenance personnel, it is likely that cannot capture in time, cause the Best Times for missing processing equipment defect.Again
Person, CF4And SO2Complicated Deng product component is decomposed, corresponding inside electric appliance state differs, and needs to combine other markers
To judge the state of inside electric appliance.
Invention content
Based on this, it is necessary to provide a kind of SF facilitating detection6The detection method and analog detection of electrical device status fill
It sets.
The present invention proposes a kind of detection SF6The new marker of electrical device status, i.e. CO2(carbon dioxide), CO2It can be used as
Gas marker is applied in detection SF6In electrical device status.
The present invention also provides a kind of SF6The detection method of electrical device status comprising following steps：
Collect SF6The gas sample generated in electrical equipment；
Detect CO in the gas sample2Concentration, and according to the CO2Concentration analysis described in SF6The shape of electrical equipment
State.
It is described according to the CO in one of the embodiments,2Concentration analysis described in SF6The state of electrical equipment is inspection
Measure the CO2Concentration when being higher than 300 μ L/L, and as time goes by, the CO2Concentration sustainable growth, then judge equipment
There may be exceptions for inside.
Further include CF in the detection gas sample in one of the embodiments,4、SO2、SOF2And SO2F2Concentration
Step, and according to the CO2Concentration coordinate CF4、SO2、SOF2And SO2F2Concentration analysis described in SF6The state of electrical equipment,
Work as CF4Concentration be higher than 400 μ L/L, SO2、SOF2And SO2F2Start to occur, and as time goes by, CF4、SO2、SOF2And
SO2F2Concentration sustainable growth, then judge the SF6Electrical equipment is abnormal.
The concentration for detecting each gas in the gas sample in one of the embodiments, be using chromatogram analysis method into
Row detection.
The present invention passes through to SF after failure6Electrical equipment gas composition analysis, it was found that new gas marker CO2, lead to
Cross detection SF6The CO of inside electric appliance2Concentration can prejudge SF in advance6The operating status of inside electric appliance, especially may be used
The case where being related to the damage of solid insulation surface defect with reflection, compared with traditional by detecting CF4、SO2、SOF2And SO2F2Equal gas
Body marker can make defect dipoles shift to an earlier date, to equipment operation maintenance personnel provide grace time judge in advance, track confirmation with
And processing defect equipment, the detection process is simpler, and result is sensitiveer, effective, reliability is high.Also, CO2Concentration it is easy
It surveys, complicated detection device is not necessarily to, consequently facilitating monitoring SF in real time6Electrical equipment internal operation state.
In addition, the present invention also provides a kind of SF6The analoging detecting device of electrical device status comprising experiment transformation
Device, casing and experiment cavity, the experiment cavity have test chamber, be equipped in the test chamber first electrode that is oppositely arranged with
Second electrode, the testing transformer are connect with the first electrode by described sleeve pipe, and the test cavity offers air inlet
SF is filled in mouth and thief hatch and the test chamber6Gas.
Conductive material clast or table are equipped between the first electrode and the second electrode in one of the embodiments,
Planar defect type solid insulation.
The distance between the first electrode and the second electrode are adjustable in one of the embodiments,.
In one of the embodiments, adsorbent is additionally provided in the test chamber.
The test cavity is equipped with transparent windows in one of the embodiments,.
Above-mentioned SF6The analoging detecting device of electrical device status is simple in structure, can be widely used in SF6Electrical device status
Analog detection during, have the advantages that result is reliable, easy to operate.
First electrode and second electrode can be ball plate electrode group, needle plate electrode group or plate plate electrode group etc., by the
(such as surface is equipped with for setting conductive material clast (such as metal fragment) or defective solid insulation between one electrode and second electrode
The solid insulation of the conductive materials such as wire), it can be used for a variety of discharge defects of analog detection.
Description of the drawings
Fig. 1 is the SF of an embodiment6The flow diagram of the detection method of electrical device status；
Fig. 2 is the SF of an embodiment6The structural schematic diagram of the analoging detecting device of electrical device status；
Fig. 3 is to use solid insulation surface metal silk creeping discharge defect model in Fig. 2 analoging detecting devices.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give presently preferred embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.Keep the understanding to the disclosure more thorough on the contrary, purpose of providing these embodiments is
Comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
Present embodiment proposes a kind of detection SF6The new marker of electrical equipment state, i.e. CO2(carbon dioxide), CO2It can
It is applied in detection SF as gas marker6In electrical device status.
Present embodiment additionally provides a kind of SF6The detection method of electrical device status, as shown in Figure 1 comprising as follows
Step：
Step S10 collects SF6The gas sample generated in electrical equipment.
Step S20, CO in detection gas sample2Concentration, and according to CO2Concentration analysis SF6The state of electrical equipment.
In the present embodiment, according to CO2Concentration analysis SF6The state of electrical equipment is to detect CO2Concentration be higher than
When 300 μ L/L, and as time goes by, CO2Concentration sustainable growth, then judge that there may be exceptions inside equipment.In addition, also
It can be in conjunction with other gas components, such as CF in gas sample4、SO2、 SOF2And SO2F2Isoconcentration further judges SF6Electrically set
Standby internal state especially detects and works as CF4Concentration be higher than 400 μ L/L, SO2、SOF2And SO2F2Start to occur, and with
Time passage, CF4、 SO2、SOF2And SO2F2Concentration sustainable growth, then may determine that the SF6Electrical equipment is abnormal, builds
Discuss strip inspection of uncapping.
In the present embodiment, CO in detection gas sample2、CF4、SO2、SOF2And SO2F2The concentration of equal gases is to use
Chromatogram analysis method is detected, as request for utilization number is CN201410425092.8, entitled " detection SF6Decomposition product
The chromatogram analysis method mentioned in the patent application of chromatogram analysis method ", or use other common and easy detection sides
Method is detected.
By to SF after failure6Electrical equipment gas composition analysis, it was found that new gas marker CO2, pass through detection
SF6The CO of electrical equipment content2Concentration can effectively judge SF6The operating status of inside electric appliance passes through compared with traditional
Detect CF4、SO2、SOF2And SO2F2Equal gases marker, detection process is simpler, and result is sensitiveer, effective, reliability is high.
CO2Concentration easily survey, be not necessarily to complicated detection device, it is easy to operate, it is highly practical, convenient in real time monitoring SF6Inside electrical equipment
Operating status.
As shown in Fig. 2, present embodiment additionally provides a kind of SF6The analoging detecting device 100 of electrical device status,
Including testing transformer 110, casing 120 and experiment cavity 130.
Resistance R is equipped between testing transformer 110 and casing 120.Casing 120 is used in testing transformer 110 and experiment
Play the role of decompression between cavity 130.Resistance R can be used as overload protection arrangement, when the electric current of system is excessive, can play
The effect of open test transformer 110.
Testing cavity 130 has test chamber 131.First electrode 132 and second electrode 133 are equipped in test chamber 131.Experiment
Transformer 110 is connect with first electrode 132 by casing 120.First electrode 132 forms high-pressure side, and second electrode 133 is zero
Current potential, to form electric field between first electrode 132 and second electrode 133.In the present embodiment, first electrode 132 with
It is additionally provided with conductive material clast between second electrode 133, can be used for analog machine electric discharge.Further, it is also possible in first electrode 132
Surface defect type solid insulation is provided between second electrode 133, such as surface is equipped with the solid insulation of wire, can be used for
Analog detection fixes the discharge defect of insulation.
In the present embodiment, first electrode 132 and second electrode 133 can be ball plate electrode group, plate plate electrode group or
Needle plate electrode group etc., and the distance between first electrode 132 and second electrode 133 are adjustable, can simulate different discharge conditions.
Test cavity 130 offers air inlet and thief hatch, and is connected with air inlet pipe 134 and sampling pipe 135, wherein sampling
Pipe 135 is equipped with pressure gauge 136, for the pressure condition in real-time display test chamber 131.SF is filled in test chamber 1316Gas
Body.It tests cavity 130 and is equipped with transparent windows 137.Transparent windows 137 can be used such as quartz, glass or acryl resin
Equal making molding.In addition, adsorbent 138 is additionally provided in test chamber 131, for simulating the physical device there are adsorbent.Absorption
Agent 138 can be used to adsorption plant internal moisture and impurity component, ensures gas degree of purity, improves its dielectric strength.
Above-mentioned SF6The analoging detecting device 100 of electrical device status is simple in structure, can be widely used in SF6Electrical equipment shape
During the analog detection of state, have the advantages that result is reliable, easy to operate.
Below in conjunction with several specific power stations or simulation embodiment to SF of the invention6The detection method of electrical device status
And analoging detecting device is further described.
Embodiment 1
The following table 1 lists several power stations in SF in recent years6Gas composition analysis as a result, by table 1 when electrical equipment malfunction
In as can be seen that except widely accepted CF4、SO2、SOF2、SO2F2It waits outside markers, also partially decomposed product, such as CO2、
H2、CS2Deng also rising appreciably, such as a large amount of CF is found that in Dongguan 500KV stands 22035 disconnecting links4、SO2、SO2F2, together
When also have the CO of 2118.1 μ L/L2, 100 μ L/L H2With the CS of 24.8 μ L/L2；In Shantou 220kV stands 4688 switch A phases
It is found that a large amount of CF4、SO2、SOF2, meanwhile, the also CO of 864.2 μ L/L2。
Table 1
Note：Unit：μL/L.
As can be seen from Table 1, the SF in part power station6Electrical equipment gas concentration lwevel is abnormal, therefore, by detecting CO2's
Concentration can reflect SF6The internal operation state of electrical equipment.
Embodiment 2
Simulated experiment is carried out using analoging detecting device as shown in Figure 2, in solid insulation surface metal silk Discharge Simulation
In experiment (defect being set on the surface of solid insulation, defect setting is as shown in Figure 3), apparent CO is detected2、SOF2And SO2
Generation, concrete condition is referring to the following table 2.Wherein, CO2It is generated when there is electric discharge at the beginning, and SOF2And SO2Then at 21 hours
Start to dramatically increase when observing apparent intermittent electric discharge.It can be seen that relating to the shelf depreciation of solid insulation inside equipment
When generation, SF will produce6Feature decomposition product CO2、SOF2And SO2.Meeting when the defects of being related to solid insulator surface damage
Generate significant CO2, and then generate apparent SOF when apparent intermittent spark discharge2And SO2。
Table 2
| Pressing time | CO2 | SOF2 | SO2 |
| 4h | 10.1 | It is not detected | It is not detected |
| 8h | 108.8 | It is not detected | It is not detected |
| 13h | 97.2 | It is not detected | It is not detected |
| 16h | 102.0 | It is not detected | It is not detected |
| 21h | 146.3 | It is not detected | It is not detected |
| 24h | 76.8 | 3.7 | 0.3 |
Note：Unit：μL/L.
In view of a large amount of CO found in equipment after a failure2Decomposition product illustrates CO2In physical device defect dipoles
With good and sensitive indicating effect.
Embodiment 3
Find CO in certain station 800KV wall bushing in April, 20142Concentration is high compared with normal operation gas chamber.In view of wall bushing
The particularity of structure, monthly to the gas chamber into line trace, CO in casing2Concentration gradually rises to 12 from the 292.7 μ L/L in April
The 626.0 μ L/L of the moon.By up to tracking in 8 months, on December 15th, 2014, equipment operation condition deteriorated, SO2On 2nd
It is interior to increase to 18.6 μ L/L from 6.9 μ L/L, and detect the SOF of 7.5 μ L/L2, concentration sharply increases, and suspects that there are offices inside equipment
It discharges in portion, it is proposed that power failure strip inspection disintegrates and finds there is electric discharge at zero screen of capacitance of bushing screen, and dielectric has been burnt.
Specific decomposition product situation of change is referring to the following table 3.
Table 3
Note：Unit：μL/L.
As can be seen from the above table, from April 9th, 2014 to September 23 days, the CO in the I wall bushings of pole2Steady-state growth, from
292.7 μ L/L rise to 630.1 μ L/L, but have no the marker SO being widely recognized as2.With the cracking of insulation, December 15,
There is the SO for indicating shelf depreciation2And SOF2, and rapid development, according to previous experiences, it can be determined that exist inside equipment and put
Electric defect, it is proposed that power failure Disintegration overhaul.
It can be seen that CO2It can be used as than SO2Equal conventional signs gas more sensitively is used to judge the gas of equipment deficiency
Body marker.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (3)
1. a kind of SF6The detection method of electrical device status, which is characterized in that include the following steps：
Collect SF6The gas sample generated in electrical equipment；
Detect CO in the gas sample2Concentration, and individually according to the CO2Concentration analysis described in SF6Electrical equipment is consolidated
The case where body insulating surface defect damage；
It is described according to the CO2Concentration analysis described in SF6The state of electrical equipment is to detect the CO2Concentration be higher than 300
When μ L/L, and as time goes by, the CO2Concentration sustainable growth, then judge that there may be exceptions inside equipment.
2. SF as described in claim 16The detection method of electrical device status, which is characterized in that further include the detection gas
CF in sample4、SO2、SOF2And SO2F2Concentration the step of, and according to the CO2Concentration coordinate CF4、SO2、SOF2And SO2F2
Concentration analysis described in SF6The state of electrical equipment, works as CF4Concentration be higher than 400 μ L/L, SO2、SOF2And SO2F2Start to occur,
And as time goes by, CF4、SO2、SOF2And SO2F2Concentration sustainable growth, then judge the SF6Electrical equipment is abnormal.
3. SF as claimed in claim 26The detection method of electrical device status, which is characterized in that detect in the gas sample
The concentration of each gas is detected using chromatogram analysis method.
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| CN107478965B (en) * | 2017-07-06 | 2019-12-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Quantitative method for solid product discharged by DC wall bushing SF 6 |
| CN110554254B (en) * | 2019-09-23 | 2021-02-02 | 华北电力大学 | Observing device for metal dust adsorption and accumulated charges of GIS or GIL equipment |
| CN110794269B (en) * | 2019-11-07 | 2021-09-07 | 云南电网有限责任公司电力科学研究院 | Green insulating gas insulating strength calculation method |
| CN111624431B (en) * | 2020-06-24 | 2021-11-23 | 西安交通大学 | GIS solid insulation multi-sample three-factor aging test device and test method |
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