CN103401336B - 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure - Google Patents
10.5kV level 4100 meters of high-altitude hydro-generator insulation structure Download PDFInfo
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- CN103401336B CN103401336B CN201310328225.5A CN201310328225A CN103401336B CN 103401336 B CN103401336 B CN 103401336B CN 201310328225 A CN201310328225 A CN 201310328225A CN 103401336 B CN103401336 B CN 103401336B
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Abstract
The invention discloses 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure, it comprises iron core (1) and coil (2), the outer surface of coil (2) is provided with low resistance structure and high resistance structure, low resistance structure is included in the low-resistance belt (3) of coil (2) outer surface parcel and is coated on the paint layer (4) of low resistance band outer surface, high resistance structure is included in the high stop band (5) of coil (2) outer surface parcel and is coated on the high resistant enamelled coating (6) of high resistance band outer surface, the overlapping edges of high resistance structure and low resistance structure.The invention has the beneficial effects as follows: by fixed subcoil insulating technique and anti-corona technique, stator insulation structure and anti dizzy structure are improved, reduce stator coil surfaces current potential, maintain the steady of coil surface current potential, avoid concentrating of local potential, ensure that unit energy normally runs under the environment of High aititude, solve electric discharge problem when running, extend the unit operation life-span.
Description
Technical field
The present invention relates to generator insulating technical field of structures, particularly 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure.
Background technology
Turbine-generator units stator coil mainly contains many rubber mouldings pressure and few glue VPI two kinds of making systems, it is more excellent that few glue VPI makes system combination property, but domestic electric machine manufactory adopts few glue VPI system to produce turbine-generator units stator coil at present, impregnating resin adopts import epoxy-anhydride system mostly, the easier moisture absorption of this impregnating resin, not easily preserve, and cost is higher.
The anti-corona silicon carbide powder mainly adopting different resistance at coil surface of overhang, forms rational voltage gradient, to ensure the even transition of end winding along face current potential, thus reaches anti-corona effective structure.Carborundum can be modulated into the paint of different resistance, carries out brushing anti-corona; Or make the anticorona varnish strap of different resistance, be wound in coil surface, the one-shot forming when coil die stamping.
Being in the power station that height above sea level is 4100m, is the unit that current Asia height above sea level is the highest, and because of rarefaction of air, during unit operation, corona in partial discharge, groove, notch corona or creepage etc. easily appear in coil, shorten the unit operation life-span.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, provide a kind of reduce stator coil surfaces current potential, hold-in winding surface potential steadily, 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure of avoiding local potential to concentrate.
Object of the present invention is achieved through the following technical solutions: 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure, it comprises iron core and coil, the outer surface of coil is disposed with low resistance structure and high resistance structure along from the direction near wire casing end side to winding wiring end, described low resistance structure is included in the low-resistance belt of coil outer surface parcel and is coated on the paint layer of low resistance band outer surface, described high resistance structure is included in the high stop band of coil outer surface parcel and is coated on the high resistant enamelled coating of high resistance band outer surface, the overlapping edges of high resistance structure and low resistance structure, described bridging arrangement is that high stop band is placed between low-resistance belt and paint layer, paint layer is placed between high stop band and high resistant enamelled coating, described low resistance structure and the outside of high resistance structure are also enclosed with one deck surrounding layer.
Described coil comprises from straight line portion and the end successively, direction near wire casing end side to winding wiring end, the end-to-end distance of high stop band is 1/3 of bending section length from the distance of end tip, and high resistant enamelled coating end-to-end distance is 1/2 of bending section length from the distance of end tip.
The overlapping part of described high resistance structure and low resistance structure is in the end of straight line portion.
Described coil is solvent-free mylar unusual ectopic pregnancy structure.
The present invention has the following advantages:
The multistage anti dizzy structure of stator coil secondary of the present invention, by fixed subcoil insulating technique and anti-corona technique, stator insulation structure and anti dizzy structure are improved, reduce stator coil surfaces current potential, maintain the steady of coil surface current potential, avoid concentrating of local potential, thus ensure that unit energy normally runs under the environmental condition of High aititude, solve electric discharge problem when running, extend the unit operation life-span.
Stator coil adopts production domesticization environment-friendly type solvent-free mylar dry mica tape VPI isolation system to make, improve the integrated performance of fixed subcoil insulating, compared with many glue insulation system, be thinned main insulation thickness, electric property and complete machine insulation property more excellent, resistance to environmental factor performance is more superior, security of operation is more reliable, reduce coil insulation internal air gap and internal discharge, improve copper factor, reduce temperature rise, improve unit insulation electrical performance, extend the unit operation life-span, motor volume can be reduced on motor construction, capacity increasing, Simplified flowsheet in motor is manufactured, save the energy, reduce costs.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
In figure, 1-is unshakable in one's determination, 2-coil, 3-low-resistance belt, 4-paint layer, 5-high stop band, 6-high resistant enamelled coating, 7-surrounding layer.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, and protection scope of the present invention is not limited to the following stated:
As shown in Figure 1, 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure, it comprises unshakable in one's determination 1 and coil 2, the outer surface of coil 2 is disposed with low resistance structure and high resistance structure along from the direction near wire casing end side to coil 2 wiring end, described low resistance structure is included in the low-resistance belt 3 of coil 2 outer surface parcel and is coated on the paint layer 4 of low resistance band outer surface, described high resistance structure is included in the high stop band 5 of coil 2 outer surface parcel and is coated on the high resistant enamelled coating 6 of low resistance band outer surface, the overlapping edges of high resistance structure and low resistance structure, described bridging arrangement is that high stop band 5 is placed between low-resistance belt 3 and paint layer 4, paint layer 4 is placed between high stop band 5 and high resistant enamelled coating 6, described low resistance structure and the outside of high resistance structure are also enclosed with one deck surrounding layer 7.
Described coil 2 comprises from straight line portion and the end successively, direction near wire casing end side to coil 2 wiring end, the end-to-end distance of high stop band 5 is 1/3 of bending section length from the distance of end tip, and high resistant enamelled coating 6 end-to-end distance is 1/2 of bending section length from the distance of end tip.
The overlapping part of described high resistance structure and low resistance structure is in the end of straight line portion.
Described coil 2 is solvent-free mylar unusual ectopic pregnancy structure.
Claims (2)
1.10.5kV level 4100 meters of high-altitude hydro-generator insulation structure, it comprises iron core (1) and coil (2), the outer surface of coil (2) is disposed with low resistance structure and high resistance structure along from the direction near wire casing end side to coil (2) wiring end, described low resistance structure is included in the low-resistance belt (3) of coil (2) outer surface parcel and is coated on the paint layer (4) of low resistance band outer surface, described high resistance structure is included in the high stop band (5) of coil (2) outer surface parcel and is coated on the high resistant enamelled coating (6) of high resistance band outer surface, described low resistance structure and the outside of high resistance structure are also enclosed with one deck surrounding layer (7), it is characterized in that: the overlapping edges of high resistance structure and low resistance structure, described bridging arrangement is that high stop band (5) is placed between low-resistance belt (3) and paint layer (4), paint layer (4) is placed between high stop band (5) and high resistant enamelled coating (6), described coil (2) comprises from straight line portion and the end successively, direction near wire casing end side to coil (2) wiring end, the end-to-end distance of high stop band (5) is 1/3 of tip lengths from the distance of end tip, and high resistant enamelled coating (6) end-to-end distance is 1/2 of tip lengths from the distance of end tip,
Described coil (2) is solvent-free mylar unusual ectopic pregnancy structure.
2. 10.5kV level according to claim 1 4100 meters of high-altitude hydro-generator insulation structure, is characterized in that: the overlapping part of described high resistance structure and low resistance structure is in the end of straight line portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310328225.5A CN103401336B (en) | 2013-07-31 | 2013-07-31 | 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310328225.5A CN103401336B (en) | 2013-07-31 | 2013-07-31 | 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103401336A CN103401336A (en) | 2013-11-20 |
| CN103401336B true CN103401336B (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310328225.5A Expired - Fee Related CN103401336B (en) | 2013-07-31 | 2013-07-31 | 10.5kV level 4100 meters of high-altitude hydro-generator insulation structure |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840612A (en) * | 2013-12-19 | 2014-06-04 | 重庆赛力盟电机有限责任公司 | Single coil VPI process |
| CN105245050B (en) * | 2015-11-12 | 2018-08-21 | 东方电气集团东风电机有限公司 | A kind of secondary multistage anti-corona structure of stator bar |
| CN106685121B (en) * | 2017-01-16 | 2023-12-05 | 浙江博菲电气股份有限公司 | Flexible plugging sleeve for vertical hydraulic generator stator bar lead insulation box and assembly method thereof |
| CN110649734B (en) * | 2018-06-27 | 2021-03-30 | 东元电机股份有限公司 | Motor winding structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060265A (en) * | 2007-05-31 | 2007-10-24 | 四川东风电机厂有限公司 | An improved process for manufacturing the hydroturbine generator 13.8KV stator coil |
| CN201369614Y (en) * | 2009-03-10 | 2009-12-23 | 江苏航天动力机电有限公司 | Anti-corona structure of motor stator |
| CN203352331U (en) * | 2013-07-31 | 2013-12-18 | 东方电气集团东风电机有限公司 | 10.5kV-level 4100-meter high-altitude hydro generator insulation structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003333786A (en) * | 2002-05-16 | 2003-11-21 | Mitsubishi Electric Corp | Electric rotating machine |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060265A (en) * | 2007-05-31 | 2007-10-24 | 四川东风电机厂有限公司 | An improved process for manufacturing the hydroturbine generator 13.8KV stator coil |
| CN201369614Y (en) * | 2009-03-10 | 2009-12-23 | 江苏航天动力机电有限公司 | Anti-corona structure of motor stator |
| CN203352331U (en) * | 2013-07-31 | 2013-12-18 | 东方电气集团东风电机有限公司 | 10.5kV-level 4100-meter high-altitude hydro generator insulation structure |
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| CN103401336A (en) | 2013-11-20 |
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Granted publication date: 20150930 Termination date: 20190731 |