CN203950671U - A kind of dry type hollow series reactor safe operation safeguard structure - Google Patents
A kind of dry type hollow series reactor safe operation safeguard structure Download PDFInfo
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- CN203950671U CN203950671U CN201320822308.5U CN201320822308U CN203950671U CN 203950671 U CN203950671 U CN 203950671U CN 201320822308 U CN201320822308 U CN 201320822308U CN 203950671 U CN203950671 U CN 203950671U
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- 238000004804 winding Methods 0.000 claims abstract description 38
- 239000003822 epoxy resin Substances 0.000 claims abstract description 19
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 19
- 239000004593 Epoxy Substances 0.000 claims abstract description 10
- 239000011152 fibreglass Substances 0.000 claims abstract description 10
- 239000003292 glue Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 5
- 239000004945 silicone rubber Substances 0.000 claims abstract description 5
- 229920006267 polyester film Polymers 0.000 claims description 16
- 150000002466 imines Chemical class 0.000 claims description 14
- 239000003365 glass fiber Substances 0.000 claims description 13
- 239000004745 nonwoven fabric Substances 0.000 claims description 12
- 239000011810 insulating material Substances 0.000 claims description 11
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 7
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- Insulating Of Coils (AREA)
Abstract
The utility model discloses a kind of dry type hollow series reactor safe operation safeguard structure, a kind of safeguard structure of dry type hollow series reactor safe operation, in coil, the number of plies in parallel of outer encapsulating line is no more than 4 layers, the number of plies in parallel that line is sealed in centre is no more than 3 layers, in coil, seals inner side and the vacation of outer encapsulating arranged outside simultaneously and seals; Between every one deck winding, winding and seal inner side, winding and seal outside between all with epoxy fibreglass silvalin, fill.Every one deck winding, seal inner side, seal outside and epoxy fibreglass silvalin brushwork epoxy resin glue all.Coil surface spraying room temperature vulcanized silicone rubber RTV.Method of the present utility model can guarantee that coil has outstanding seal integrity, resistance to expansion and contraction, insulating properties, guarantees that electric property is excellent.
Description
Technical field
The utility model belongs to field of electrical equipment, relates to a kind of new safeguard structure that prevents reactor accident, especially a kind of dry type hollow series reactor safe operation safeguard structure.
Background technology
Since reform and opening-up, China's power grid construction is accelerated, popularization, and transformer substation construction is also increasing.Along with scientific and technological development and social progress, the consciousness of people's conservation of nature is more and more stronger, becomes gradually the main flow of reactor product without oily dry reactor, is widely used in power transmission and transformation field.Dry-type air-core reactor has the advantages such as loss is little, noise is low, maintenance simply, does not exist magnetic saturation phenomenon, and the reactance value linearity is good, designed life is long, and in electrical network, application is more and more extensive.35kV and the following capacitor group of 65%-75% all adopt dry-type hollow structure with series reactor at present.And in capacitor device, reactor is the same with capacitor is the device very responsive to overvoltage, overcurrent, because of improper use or because of natural aging because of service conditions is severe or because of operational management not really up to the mark, the reason such as harmful competition in recent years causes in addition product quality is uneven, dry-type air-core reactor Frequent Troubles, damage that even burnout failure is of common occurrence, to electric power netting safe running, cause certain influence.Because transformer station is unmanned and the not predictability of accident, from reactor self, prevent reactor accident to become a problem urgently to be resolved hurrily.
Summary of the invention
The purpose of this utility model is to overcome existing reactor in the place of design, insulation, technologic some shortcomings, a kind of dry type hollow series reactor safe operation safeguard structure is proposed, this safeguard structure can guarantee that coil has outstanding seal integrity, resistance to expansion and contraction, insulating properties, guarantees that electric property is excellent.
The purpose of this utility model solves by the following technical programs:
A safeguard structure for dry type hollow series reactor safe operation, the number of plies in parallel of outer encapsulating line is no more than 4 layers in coil, and the number of plies in parallel that line is sealed in centre is no more than 3 layers, seals inner side and the vacation of outer encapsulating arranged outside is sealed in coil simultaneously; Between every one deck winding, winding and seal inner side, winding and seal outside between all with epoxy fibreglass silvalin, fill.
Every one deck winding, seal inner side, seal outside and epoxy fibreglass silvalin brushwork epoxy resin glue all.
Coil surface spraying room temperature vulcanized silicone rubber RTV.
The insulating material of described winding inter-turn is by the nonwoven fabrics half-stack package of the imines film half-stack package of the polyester film half-stack package of 2 layers of 0.028mm, 1 layer of 0.028mm, 1 layer of 0.05mm and soak brush ring epoxy resins and form.
Between described every one deck winding and glass fiber yarn, seal inner side and glass fiber yarn between, seal outside and glass fiber yarn between with glass fabric, hold.
Compared with prior art, its beneficial effect is the utility model:
1, maximum current density is no more than 1.05A/mm
2, reduced kelvin effect, reduce the reactor bulk temperature rising being caused by harmonic current superposition too high.
2, design temperature rise is 60K, overcomes average temperature rising not high, but occurs that different focus causes the phenomenon of ageing of insulation damage to occur.
3, the number of plies of interior outer encapsulating is 4 layers, and tundish sealing number is 3 layers, and the suffered adjacent thermal radiation of sealing of interior outer encapsulating is little, simultaneously radiating condition good, guarantee that thermal conductivity meets designing requirement.
4, seal in coil inner side and the vacation of outer encapsulating arranged outside and seal, can effectively make to seal to evade and expose to the sun and rain, solve the be full of cracks of coil surfaces externally and internally and along the creepage problem of face.
5, between every one deck winding and winding and seal inner side, all fill with epoxy fibreglass silvalin between outside, and brushwork epoxy resin glue, at impregnated glass fibre yarn, by epoxy resin, permeated and adsorb after certain epoxy resin, to form seamless integral body with winding, roughly the same pour into a mould structure, avoid reserving staying space for moisture and rainwater, gapless has also greatly reduced the be rivals in a contest aging action of insulation of office simultaneously.
6, at the insulating material of winding inter-turn, adopt (the polyester film half-stack packages of 2 layers of 0.028mm)+(the imines film half-stack package of 1 layer of 0.028mm)+(nonwoven fabrics half-stack package of 1 layer of 0.05mm)+soak brush ring epoxy resins as wire main insulation, after optimizing, the withstand voltage level of insulation combination has improved 70% before optimizing, guarantee turn-to-turn withstand voltage level, and imines film there will not be hydrolysis phenomenon, non-woven cloth glue impregnating dries the whole mechanical stress levels that can strengthen coil through heat simultaneously.
7, coil is inverted coiling, and the gap that can easily drench with rain to coil top is played envelope and mended.
8, five to ten circle lines of the initial sum of every one deck winding ending adopt rare winding technologe, utilize impregnated glass fibre yarn to fill the gap of circle and circle, as the reinforcement of turn-to-turn insulation, to ageing of insulation even breakdown between adjacent turns played effective protective action.
9, adopt flower around around yarn process, guaranteed the force intensity that is subject to of glass fibre reinforced plastic integral after solidifying, avoid be full of cracks.
10, coil surface spraying RTV glue, can be water-fast, resistance to ozone, and weather-resistant, as coating, can prevent that rainwater from infiltrating.
Accompanying drawing explanation
Fig. 1 is the structural representation of old reactor;
Fig. 2 is dry type hollow series reactor structural representation of the present utility model;
In figure: 1.4 layer line structures are sealed, seal and outer encapsulating in 2., seal in the middle of 3., 4. inside and outside vacation is sealed, 5. epoxy fibreglass silvalin, 6. epoxide-resin glue, 7.3 strata ester film half-stack package, the 8. insulating material of winding inter-turn.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Referring to Fig. 1,2, a kind of dry type hollow series reactor safe operation safeguard structure, during design coil, carries out allowance amplification to the selection of current density; Amplify the nargin of temperature rise, leave and take enough temperature rise allowances; The number of plies in parallel of interior outer encapsulating line is no more than 4 layers, and the number of plies in parallel that line is sealed in centre is no more than 3 layers, seals in coil inner side and the vacation of outer encapsulating arranged outside simultaneously and seals; Epoxy resin adopts F level, layer and glass fiber yarn between, with glass fabric, hold between layers, impregnation is dried, and at the insulating material of winding inter-turn, adopts (the polyester film half-stack packages of 2 layers of 0.028mm)+(the imines film half-stack package of 1 layer of 0.028mm)+(nonwoven fabrics half-stack package of 1 layer of 0.05mm)+soak brush ring epoxy resins as wire main insulation; Between every one deck winding and winding and seal inner side, between outside all with the filling of epoxy fibreglass silvalin, and brushwork epoxy resin glue; During coil winding, coil is inverted and is carried out coiling, and five to ten circle lines of the initial sum ending of every one deck winding adopt rare winding technologe, and the coiling of winding table veil layer adopts flower around around yarn process, at coil surface spraying room temperature vulcanized silicone rubber RTV.
In such scheme, the maximum current density of the every layer line of coil is no more than 1.05A/mm
2.
In such scheme, the nargin maximum temperaturerise of design temperature rise is 60K.
One, design demonstration:
1, the demonstration of current density and definite
Designer, when carrying out coil design, carries out allowance amplification to the selection of current density, and the maximum current density of every layer line is no more than 1.05A/mm
2, compare with maximum current density before, declined 20%.
Current density is only reference value, and the loss that main performance assessment criteria is reactor is up to standard.Although empirical coefficient tells the maximum current density of our aluminum steel should get 1.5-1.6A/mm
2between.But we know electric charge there is kelvin effect in the motion in conductor.So-called kelvin effect, refers to for the alternating current in conductor, is greater than the phenomenon of conductor internal current density near the current density at conductive surface place.Because the existence of this phenomenon, so current density should be again to going down, to leave corresponding nargin.General current density is chosen maximum and is no more than 1.3A/mm
2, consider that the reactor bulk temperature rising that the lowest high-current value after harmonic current superposition may cause is higher, so the choosing of current density, more suitable amplification allowance is stopped the hidden danger that reason causes in this respect.
2, the demonstration of design temperature rise and definite
Design temperature rise is left and taken enough allowances, the design temperature rise before comparing, and nargin is amplified 10K again, not high to overcome average temperature rising, but occurs that different focus causes the phenomenon of ageing of insulation damage to occur.The highest design temperature rise is 60K, and line layer is no more than 4 layers
3, thermal radiation is determined and is sealed the number of plies in parallel with thermal conductivity
The number of plies in parallel of interior outer encapsulating is no more than 4 layers, and centre is sealed the line parallel number of plies and is no more than 3 layers.Because the suffered adjacent thermal radiation of sealing of interior outer encapsulating is little, radiating condition is good simultaneously, and for guaranteeing that thermal conductivity meets designing requirement, during regulation design, the line number of plies of interior outer encapsulating must not be greater than 4 layers, and shunt layer number is sealed in centre must not be over 3 layers.
4, inside and outside employing vacation is sealed.
Seal without winding in interior outside, therefore claim vacation to seal.Vacation is sealed in dress and coil and is sealed inner side and outer encapsulating outside, can avoid rainwater, the corrosion of Exposure to Sunlight to coil surfaces externally and internally, also can alleviate to expand with heat and contract with cold coil integral mechanical structure is damaged simultaneously, avoids coil surface to occur crack performance.
Two, insulation system is chosen:
1, adopt F class F insulation resin to replace original B-class insulation resin.F level epoxy resin has better heat resistance compared with B level epoxy resin.Can make up the temperature rise error that temperature rise of hot spot exceeds compared with average temperature rising.Guarantee reactor safe operation.
Following table is B level and the comparison of F stage temperature rise limit value
2, between layer and glass fiber yarn, layer holds with glass fabric with interlayer, impregnation forms the fiberglass body sealing after drying, inner gapless, just as vacuum pouring body.Moisture rainwater is stored nowhere, guarantees coil sealing.Without partial discharge, guarantee performance and the life-span of insulating material simultaneously.
3, wire insulation material selection, carries out great many of experiments contrast, chooses optimal case.
Choose optimum winding insulation combination of materials, guarantee that wire insulation has high-intensity withstand voltage and anti ageing property.
Test method: insulating material is combined, be paperwrapped in conductive line surfaces.Wire connects high pressure, and ground wire pressurizes after being connected to wire insulation surface, contrasts the puncture voltage that variant insulating material holds lower wire.
By the polyester film of following different-thickness, nonwoven fabrics, imines film, the above three kinds of materials of poly-the third film are carried out to withstand voltage test:
The polyester film of a, 3 layers of 0.02mm of half-stack package;
The polyester film of b, 3 layers of 0.028mm of half-stack package;
C, 2 layers of 0.028mm polyester film+1 layer 0.028mm of half-stack package gather the third film;
D, 2 layers of 0.028mm polyester film+1 of half-stack package layer 0.028mm imines film;
E, 2 strata ester film+1 layer imines film+nonwoven fabrics;
F, 2 strata ester film+1 layer imines film+nonwoven fabrics+impregnation;
By above several situations are carried out to withstand voltage test, the results are shown in following table:
Thickness for material is chosen, and thickness increases, and insulation property increase thereupon, but thermal diffusivity weakens thereupon.
From above result of the test, can find out, the polyester film of 0.02mm, 3 layers of half-stack package cannot bear and puncture when 10.5kV left and right.The polyester film of 0.028mm, 3 layers of half-stack package cannot bear and puncture when 12.3kV left and right.The poly-third film tolerance 12.8kV of the polyester film of thickness 0.028mm, 2 layers of half-stack package and 0.028mm, 1 layer of half-stack package punctures.The situation that the imines film of the polyester film of thickness 0.028mm, 2 layers of half-stack package and 0.028mm, 1 layer of half-stack package wraps again, proof voltage situation is more much better than the former, reaches 13.6kV and punctures.Imines film is a kind of have good heat-resisting and cold-resistant, radiation resistance, resistance to water, acid proof insulating material.
In order to guarantee the high-strength mechanicalness turn-to-turn insulation intensity of coil, we give its outer half-stack package layer of non-woven fabric more again, and when nonwoven fabrics does not have impregnation to dry, now withstand voltage situation is identical with the former.Visible nonwoven fabrics itself is not had insulation property.
In nonwoven surface, carry out brush coating processing and dry, withstand voltage level is now greatly improved again.Because nonwoven fabrics can absorbing ring epoxy resins, after it is dried, quite at wire, form one deck epoxy resins insulation shell outward, its insulation property strengthen greatly, withstand voltage properties, compared with above several situations, also increases significantly, and the anti-short circuit capability of reactor has also obtained huge raising.
Therefore aspect the choosing of insulation between coils material, adopt (the polyester film half-stack packages of 2 layers of 0.028mm)+(the imines film half-stack package of 1 layer of 0.028mm)+(nonwoven fabrics half-stack package of 1 layer of 0.05mm)+soak brush ring epoxy resins as wire main insulation.
Parameter is as follows:
Polyester film thickness 0.028mm, imines film thickness 0.028mm, nonwoven thickness is 0.05mm, monolateral insulation thickness 0.23mm.Insulation thickness between adjacent two circles reaches 0.46mm, turn-to-turn is withstand voltage can arrive 25kV more than.
Three, PROCESS FOR TREATMENT and production control
1,, during coil winding, coil is inverted and is carried out coiling.The advantage of being inverted coiling is according to gravity principle, and the epoxy resin on glass fiber can be to dirty when heat is dried, thereby seal the upper surface of sealing, the phenomenon of avoiding upper surface to exist gap to cause rainwater very easily to infiltrate.
While 2, winding the line, adopt the rare winding technologe in end.
Five to ten circle lines of the initial sum ending of every one deck winding adopt rare winding technologe, utilize impregnated glass fibre yarn to fill the gap of circle and circle, as the reinforcement of turn-to-turn insulation.To ageing of insulation even breakdown between adjacent turns air flue effective protective action, effectively overcome the full voltage percussion that reactor end runs into when switching.
3, terminal and tie up under loose thread and adopt dual-seal technique, twice sealing to guarantee that reactor winding end is seamless, avoids rainwater and moisture to enter coil inside.
During coiling, tie up yarn place and outlet and fill up for the first time sealing with clay.During coil finishing, with normal temperature epoxy clay, carry out secondary and fill up sealing.
4, coil surface spraying RTV, RTV claims again room temperature vulcanized silicone rubber, it has good thermal endurance, hydrophobicity, electrical insulating property, while is due to the introducing of active end group, make it have excellent physical and mechanical properties, especially in tensile strength, specific elongation and tearing strength, be significantly improved.Reactor body surface spraying RTV glue, can effectively avoid edge flashing and tree dsicharge, reduces the aging speed of insulating material.
Four, the test of expanding with heat and contract with cold of new construction application
Test method:
Adopt new construction, new technology pilot production reactor one phase, adopt test reactor one phase of conventional material and explained hereafter same model, carry out contrast test.
Test and testing equipment see the following form:
| Device name | Model | Quantity |
| Testing transformer | YD-10/100 | 1 |
| Induction voltage regulator | TSJAY-100 | 1 |
| Combined-voltage table | T75 | 1 |
| HF-8001 transformer parameter tester 1 | HF-8001 | 1 |
| Voltage transformer | JDZ10-3 | 1 |
| Current transformer | HL48-11 | 1 |
| Impulse voltage generator | CJDY-600 | 1 |
| Microcomputer automatic temperature measurement instrument | KHM-16A | 1 |
| Intelligent oven | JB/75520-91 | 1 |
| Infrared radiation thermometer | Fuluk | 1 |
Contrast test: after two reactors have been produced, do special marking with difference, respectively two reactors are made to delivery test, and do lightning impulse test, wave recording.
The object of lightning impulse is that checking reactor closes a floodgate moment, and it is creepage whether reactor there will be in sealing, and whether turn-to-turn insulation is reliable.The turn-to-turn voltage drop of reactor when operation is very low, only has tens volts of trivial a few volts, and the possibility of electrical breakdown is very little.
Under drying regime, give the standard lightning impulse (1.2/50 μ s) three times that two samples apply respectively negative polarity, as the lightning impulse waveform of test turn-to-turn, A terminal and X terminal are done respectively.
Apply voltage: 75kV
Test method: the negative polarity all-wave that once reduces voltage is impacted
The negative polarity all-wave of three rated voltages is impacted
By test surge waveform, waveform meets the regulation of the 12nd of GB1094.3.
Simulation is done lightning impulse test after drenching with rain again, and wave recording.
Reactor is winched in baking oven, close oven door and heat up, temperature is increased to 100 ℃ and keeps closing baking oven after 2 hours, treats that it is down to room temperature.
After hanging out baking oven and drenching with rain, again hang in baking oven, close oven door and heat up, temperature is increased to 100 ℃ and keeps closing baking oven after 2 hours, treats that it is down to room temperature.
Repeat above-mentioned caloric test 8 times, then two-phase reactor is carried out to delivery test, and do lightning impulse test, observe waveform.
By test surge waveform, model machine A and model machine B through drenching with rain and hot cold test after waveform still meet the regulation of the 12nd of GB1094.3.
Although expand with heat and contract with cold, test does not obtain significant contrast effect, but through consulting related data, we know, imines film is the insulating material of facile hydrolysis not at high temperature, and polyester film easily produces hydrolysis under high temperature action, after long-play, insulation degradation is serious, cause wire turn-to-turn insulation to reduce, still adopt above-mentioned prioritization scheme to produce.Maintain strict control over the links such as design, raw material, production, check.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; can also make some simple deduction or replace, all should be considered as belonging to the utility model and determine scope of patent protection by submitted to claims.
Claims (5)
1. the safeguard structure of a dry type hollow series reactor safe operation, it is characterized in that: in coil, the number of plies in parallel of outer encapsulating line is no more than 4 layers, the number of plies in parallel that line is sealed in centre is no more than 3 layers, in coil, seals inner side and the vacation of outer encapsulating arranged outside simultaneously and seals; Between every one deck winding, winding and seal inner side, winding and seal outside between all with epoxy fibreglass silvalin, fill.
2. the safeguard structure of dry type hollow series reactor safe operation as claimed in claim 1, is characterized in that: every one deck winding, seal inner side, seal all brushwork epoxy resin glue of outside and epoxy fibreglass silvalin.
3. the safeguard structure of dry type hollow series reactor safe operation as claimed in claim 1, is characterized in that: coil surface spraying room temperature vulcanized silicone rubber RTV.
4. the safeguard structure of dry type hollow series reactor safe operation as claimed in claim 1, is characterized in that: the insulating material of described winding inter-turn is by the nonwoven fabrics half-stack package of the imines film half-stack package of the polyester film half-stack package of 2 layers of 0.028mm, 1 layer of 0.028mm, 1 layer of 0.05mm and soak brush ring epoxy resins and form.
5. the safeguard structure of dry type hollow series reactor safe operation as claimed in claim 1, is characterized in that: between described every one deck winding and glass fiber yarn, seal between inner side and glass fiber yarn, seal between outside and glass fiber yarn and hold with glass fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320822308.5U CN203950671U (en) | 2013-12-13 | 2013-12-13 | A kind of dry type hollow series reactor safe operation safeguard structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320822308.5U CN203950671U (en) | 2013-12-13 | 2013-12-13 | A kind of dry type hollow series reactor safe operation safeguard structure |
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| Publication Number | Publication Date |
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| CN203950671U true CN203950671U (en) | 2014-11-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252038A (en) * | 2016-07-27 | 2016-12-21 | 中国科学院等离子体物理研究所 | A kind of high power big electric current dry-type hollow water-cooled cast-type reactor |
| CN108022739A (en) * | 2016-11-04 | 2018-05-11 | 许继集团有限公司 | The package method and dry type hollow shunt reactor of a kind of dry type hollow shunt reactor |
| CN109036808A (en) * | 2018-07-24 | 2018-12-18 | 南方电网科学研究院有限责任公司 | Composite insulation structure of air-core reactor |
| CN110945611A (en) * | 2017-08-24 | 2020-03-31 | Abb瑞士股份有限公司 | Reactor and corresponding production method |
-
2013
- 2013-12-13 CN CN201320822308.5U patent/CN203950671U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106252038A (en) * | 2016-07-27 | 2016-12-21 | 中国科学院等离子体物理研究所 | A kind of high power big electric current dry-type hollow water-cooled cast-type reactor |
| CN108022739A (en) * | 2016-11-04 | 2018-05-11 | 许继集团有限公司 | The package method and dry type hollow shunt reactor of a kind of dry type hollow shunt reactor |
| CN110945611A (en) * | 2017-08-24 | 2020-03-31 | Abb瑞士股份有限公司 | Reactor and corresponding production method |
| CN109036808A (en) * | 2018-07-24 | 2018-12-18 | 南方电网科学研究院有限责任公司 | Composite insulation structure of air-core reactor |
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