CN110444380A - 66kV voltage class Oversea wind power generation single-phase step-up transformer group - Google Patents
66kV voltage class Oversea wind power generation single-phase step-up transformer group Download PDFInfo
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- CN110444380A CN110444380A CN201910663128.9A CN201910663128A CN110444380A CN 110444380 A CN110444380 A CN 110444380A CN 201910663128 A CN201910663128 A CN 201910663128A CN 110444380 A CN110444380 A CN 110444380A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2866—Combination of wires and sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
Abstract
Proposed by the present invention is 66kV voltage class Oversea wind power generation single-phase step-up transformer group.2200~11000kVA of rated capacity, it includes iron core, low pressure winding, high-voltage winding, fuel tank, transformer oil, low-voltage lead, high-voltage connection, low-tension bushing, bushing, oil conservater, gas relay, pressure relief valve, tap switch, oil surface temperature meter, winding temperature gage, bushing current transformer and dehydrating breather.Low-pressure side voltage rating 0.69kV, high side voltage grade can reach 66kV, idling load-loss is superior to national standard, it improves existing case and becomes primary side voltage class 35kV to 66kV, solve the problems, such as that the replacement of Oversea wind power generation step-up transformer installation maintenance is difficult, electric energy transmission network transmission range is short, transmission line line loss is high, pressure drop is big, meet the remote transmission requirement of marine large capacity wind-power electricity generation, it is grid-connected to be transmitted directly to land primary substation.It is suitable for being used as offshore wind energy plant.
Description
Technical field
The present invention relates to power supply technical fields, dedicated more particularly to a kind of 66kV voltage class Oversea wind power generation
Serial single-phase step-up transformer group.
Background technique
Oversea wind power generation is in wind power generation field economy with higher, the at sea utilization side of wind energy in the world
Face, either theoretical research or application study all achieve major progress.Oversea wind power generation, which rapidly develops, becomes other hairs
The rival of power technology.
The existing dedicated step-up transformer capacity of Oversea wind power generation is 2~8MVA, and wind-driven generator exit potential is
0.69kV, boosted transformer boost to 35kV voltage class, are delivered to marine primary substation by submarine cable and boost to
220kV, then through submarine cable to be delivered to land grid-connected.Since 35kV voltage is lower, network transmission is apart from short, submarine cable section
Greatly, line loss is high, and pressure drop is big, and electric energy cannot be delivered directly to land, and needing to improve voltage class by one time power transformation could be defeated
It send to land power grid, the buying of submarine cable and the specific gravity for being laid with occupancy offshore wind farm investment are larger, while existing Oversea wind
The volume of power generation step-up transformer is big, maintenance replacement difficulty is removed out of blower fan tower barrel, it is extra large that above-mentioned reason has seriously affected China
The development of upper wind power industry.
Summary of the invention
The present invention is big for the dedicated step-up transformer volume of existing Oversea wind power generation, primary side voltage is low, transmission range
It is short, submarine cable section is big, line loss is high, pressure drop is big, the buying of submarine cable and is laid with the problems such as cost height, provide one kind
66kV voltage class Oversea wind power generation series special single-phase step-up transformer group, rated capacity 2200kVA~11000kVA, one
Secondary side rated output voltage grade is 66kV, rated secondary voltage 0.69kV, frequency 50Hz, single-phase double winding, no Excitation Adjustment
Pressure, idling load-loss reach national second level Energy Efficiency Standard and lower than national standard and power grid standard, low partial discharge, low noise, corrosion resistances
By force, long service life.
The purpose of the present invention is what is be achieved through the following technical solutions:
66kV voltage class Oversea wind power generation series special single-phase step-up transformer group abbreviation 66kV voltage class Oversea wind
Generate electricity single-phase step-up transformer group, 2200~11000kVA of rated capacity, low-pressure side voltage rating 0.69kV, high side voltage etc.
Grade can reach 66kV, improve existing step-up transformer primary side voltage class 35kV to 66kV；Including iron core, low pressure winding is high
Press winding, fuel tank, transformer oil, low-voltage lead, high-voltage connection, low-tension bushing, bushing, oil conservater, gas relay, pressure
Power relief valve, tap switch, oil surface temperature meter, winding temperature gage, bushing current transformer and dehydrating breather；
Further, the high-voltage winding is wound on outside low pressure winding, and high-voltage winding and low pressure winding are system around whole set after winding
It is attached on the stem of iron core, transformer body is placed in fuel tank by drying process；The head and the tail of low pressure winding are drawn by low pressure
Line is connected to low-tension bushing, and the head and the tail of high-voltage winding are connected to bushing by high-voltage connection, and fuel tank outer surface and outside are tight
Firmware use hot galvanizing anticorrosion process, two sides be equipped with fixed gilled radiator, oil conservater, gas relay, pressure relief valve,
Oil surface temperature meter, winding temperature gage are mounted on fuel tank top cover, are located at outside fuel tank, tap switch is mounted on fuel tank top cover, is located at
Fuel tank internal, dehydrating breather are mounted on oil conservater, and bushing current transformer is mounted in fuel tank high-voltage lifting seat；
Further, the iron core uses high magnetic conduction cold-rolled orientation silicon steel piece, 45 ° of mitered crack structures of single-phase double-column formula Pyatyi, core
Column and iron yoke are circular configuration；High-voltage winding selects semihard paper bag flat type copper wire, and low pressure winding copper foil coiling, winding construction is more
Layer a drum type brake left side around to；High-voltage connection selects copper stranded conductor, and low-voltage lead selects copper bar；Bushing is additional with having using transformer
Cable formula casing is worn in insulation, and low-tension bushing uses transformer composite ceramic insulating sleeve；Transformer oil uses 45# or 25# insulating oil,
Oil conservater uses capsule type oil storage cabinet；Gas relay is using double floating balls, two point baffle-type gas relay；Pressure relief valve
Using guidance type pressure relief valve；Tap switch uses blue particle silicon using the horizontal cage modle tap switch of no excitation, dehydrating breather
Glue formula dehydrating breather；
Further, the 66kV voltage class Oversea wind power generation single-phase step-up transformer group model is D11(13) -2200~
11000/69, rated capacity be 2200~11000KVA, rated voltage ratio 69/0.69, rated frequency 50Hz, the number of phases be it is single-phase,
69 ± 2 × 2.5%kV of range of regulation, pressure regulation position be middle part voltage regulating, impedance voltage percentage 8%, no-load loss, no-load current,
Load loss is all satisfied or better than national standard, top-oil temperature ceiling value 55K, winding temperature rise limit value 65K, high-voltage isulation level
(LI/AC) 325kV/140kV(480kV/200kV), low-voltage insulation level (LI/AC) 40kV/18kV, high-pressure side 1.5Um/Electricity
Depress partial discharge quantity≤100pc, low-pressure side 1.5Um/Partial discharge quantity≤300pc under voltage.
The beneficial effects of the present invention are: (1) present invention by improving primary side voltage class, reduces the section of transmission cable
Product reduces line loss and pressure drop, reduces line construction cost, reduces the buying of submarine cable and is laid with cost；(2) change of the invention
Depressor primary side voltage class reaches 66kV, electric energy can be directly transported after primary side Protection control system to land booster stations,
The construction investment of sea 220kV booster stations is saved, booster stations operation and maintenance are more convenient；(3) transformer of the invention is single-phase change
Depressor maintains easily, small in size, and enabling size in blower fan tower barrel bottom is small, under the premise of guaranteeing blower fan tower barrel mechanical strength, tower
Wall thickness reduces, and saves blower fan tower barrel construction cost.
Detailed description of the invention
Attached drawing 1 is overlooking structure diagram of the invention；
Attached drawing 2 is schematic view of the front view of the invention；
Attached drawing 3 is side structure schematic view of the invention.
In figure, 1. iron cores, 2. low pressure windings, 3. high-voltage windings, 4. fuel tanks, 5. transformer oil, 6. low-voltage leads, 7. high pressures
Lead, 8. low-tension bushings, 9. bushings, 10. oil conservaters, 11. gas relays, 12. pressure relief valves, 13. tap switches,
14. oil surface temperature meter, 15. winding temperature gages, 16. bushing current transformers, 17. dehydrating breathers.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
According to the figure, 66kV voltage class Oversea wind power generation series special single-phase step-up transformer group abbreviation 66kV voltage
Grade Oversea wind power generation single-phase step-up transformer group, 2200~11000kVA of rated capacity, low-pressure side voltage rating 0.69kV,
High side voltage grade can reach 66kV, improve existing step-up transformer primary side voltage class 35kV to 66kV；Including iron core
1, low pressure winding 2, high-voltage winding 3, fuel tank 4, transformer oil 5, low-voltage lead 6, high-voltage connection 7, low-tension bushing 8, bushing
9, oil conservater 10, gas relay 11, pressure relief valve 12, tap switch 13, oil surface temperature meter 14, winding temperature gage 15, set
Tubular type current transformer 16 and dehydrating breather 17.
The high-voltage winding 3 is wound on outside low pressure winding 2, and high-voltage winding 3 and low pressure winding 2 are system around whole set after winding
It is attached on the stem of iron core 1, transformer body is placed in fuel tank 4 by drying process；The head and the tail of low pressure winding 2 pass through low pressure
Lead 6 is connected to low-tension bushing 8, and the head and the tail of high-voltage winding 3 are connected to bushing 9,4 outer surface of fuel tank by high-voltage connection 7
And external fastening uses hot galvanizing anticorrosion process, two sides are equipped with fixed gilled radiator, oil conservater 10, gas relay
11, pressure relief valve 12, oil surface temperature meter 14, winding temperature gage 15 are mounted on 4 top cover of fuel tank, are located at outside fuel tank 4, tap is opened
It closes 13 and is mounted on 4 top cover of fuel tank, be located at fuel tank internal, dehydrating breather 17 is mounted on oil conservater 10, bushing current transformer 16
It is mounted in 4 high-voltage lifting seat of fuel tank.
The iron core 1 uses high magnetic conduction cold-rolled orientation silicon steel piece, 45 ° of mitered crack structures of single-phase double-column formula Pyatyi, stem and
Iron yoke is circular configuration；High-voltage winding 3 selects semihard paper bag flat type copper wire, and the copper foil coiling of low pressure winding 2, winding construction is multilayer
A drum type brake left side around to；High-voltage connection 7 selects copper stranded conductor, and low-voltage lead 6 selects copper bar；Bushing 9 is attached with having using transformer
Insulation is added to wear cable formula casing, low-tension bushing 8 uses transformer composite ceramic insulating sleeve；Transformer oil 5 is exhausted using 45# or 25#
Edge oil, oil conservater 10 use capsule type oil storage cabinet；Gas relay 11 is using double floating balls, two point baffle-type gas relay；
Pressure relief valve 12 uses guidance type pressure relief valve；Tap switch 13 is using the horizontal cage modle tap switch of no excitation, dehydrating breather
17 use blue particle silica gel-type dehydrating breather.
The 66kV voltage class Oversea wind power generation single-phase step-up transformer group model is D11(13) -2200~
11000/69, rated capacity be 2200~11000KVA, rated voltage ratio 69/0.69, rated frequency 50Hz, the number of phases be it is single-phase,
69 ± 2 × 2.5%kV of range of regulation, pressure regulation position be middle part voltage regulating, impedance voltage percentage 8%, no-load loss, no-load current,
Load loss is all satisfied or better than national standard, top-oil temperature ceiling value 55K, winding temperature rise limit value 65K, high-voltage isulation level
(LI/AC) 325kV/140kV(480kV/200kV), low-voltage insulation level (LI/AC) 40kV/18kV, high-pressure side 1.5Um/Electricity
Depress partial discharge quantity≤100pc, low-pressure side 1.5Um/Partial discharge quantity≤300pc under voltage.
The working principle of the invention:
Fan outlet voltage 690V, after 66kV voltage class Oversea wind power generation series special single-phase step-up transformer group,
Transformer primary side voltage class reaches 66kV, and electric energy can be directly transported after primary side Protection control system and is boosted to land
It stands, saves the construction investment of sea 220kV booster stations, booster stations operation and maintenance are more convenient；Transformer of the invention is single-phase change
Depressor maintains easily, small in size, and enabling size in blower fan tower barrel bottom is small, under the premise of guaranteeing blower fan tower barrel mechanical strength, tower
Wall thickness reduces, and saves blower fan tower barrel construction cost.
Advantages of the present invention:
66kV voltage class Oversea wind power generation series special single-phase step-up transformer group, rated capacity 2200kVA~
11000kVA, primary side rated output voltage grade are 66kV, rated secondary voltage 0.69kV, frequency 50Hz, single-phase double wrap
Group, non-excitation pressure adjustment, idling load-loss reach national second level Energy Efficiency Standard and lower than national standard and power grid standard, low partial discharge, low noises
Sound, corrosion resistance is strong, long service life.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1.66kV voltage class Oversea wind power generation single-phase step-up transformer group, it is characterized in that:
2200~11000kVA of rated capacity, low-pressure side voltage rating 0.69kV, high side voltage grade can reach 66kV, improve
Existing step-up transformer primary side voltage class 35kV to 66kV；Including iron core (1), low pressure winding (2), high-voltage winding (3), oil
Case (4), transformer oil (5), low-voltage lead (6), high-voltage connection (7), low-tension bushing (8), bushing (9), oil conservater (10),
Gas relay (11), pressure relief valve (12), tap switch (13), oil surface temperature meter (14), winding temperature gage (15), casing
Formula current transformer (16) and dehydrating breather (17).
2. 66kV voltage class Oversea wind power generation single-phase step-up transformer group according to claim 1, it is characterized in that: institute
It states high-voltage winding (3) and is wound on low pressure winding (2) outside, high-voltage winding and low pressure winding are system around winding rear integral assembling to iron core
(1) on stem, transformer body is placed in fuel tank (4) by drying process；The head and the tail of low pressure winding pass through low-voltage lead
(6) it is connected to low-tension bushing (8), the head and the tail of high-voltage winding are connected to bushing (9), fuel tank appearance by high-voltage connection (7)
Face and external fastening use hot galvanizing anticorrosion process, and two sides are equipped with fixed gilled radiator, oil conservater (10), gas relay
Device (11), pressure relief valve (12), oil surface temperature meter (14), winding temperature gage (15) are mounted on fuel tank top cover, are located at outside fuel tank
Portion；Tap switch (13) is mounted on fuel tank top cover, is located at fuel tank internal, and dehydrating breather (17) is mounted on oil conservater, bushing type electricity
Current transformer (16) is mounted in fuel tank high-voltage lifting seat.
3. 66kV voltage class Oversea wind power generation single-phase step-up transformer group according to claim 1, it is characterized in that: institute
Iron core is stated using high magnetic conduction cold-rolled orientation silicon steel piece, 45 ° of mitered crack structures of single-phase double-column formula Pyatyi, stem and iron yoke are round knot
Structure；High-voltage winding select semihard paper bag flat type copper wire, low pressure winding copper foil coiling, winding construction be a multi-layer cylindrical left side around to；
High-voltage connection selects copper stranded conductor, and low-voltage lead selects copper bar；Bushing using transformer with there is superinsulation to wear cable formula casing,
Low-tension bushing uses transformer composite ceramic insulating sleeve；Transformer oil (5) uses 45# or 25# insulating oil, and oil conservater uses glue
Bellows oil conservater；Gas relay is using double floating balls, two point baffle-type gas relay；Pressure relief valve uses guidance type pressure
Power relief valve；Tap switch uses blue particle silica gel-type dehydrating breather using the horizontal cage modle tap switch of no excitation, dehydrating breather.
4. 66kV voltage class Oversea wind power generation single-phase step-up transformer group according to claim 1, it is characterized in that: institute
Stating 66kV voltage class Oversea wind power generation single-phase step-up transformer group model is D11(13) -2200~11000/69, specified appearance
Amount be 2200~11000KVA, rated voltage ratio 69/0.69, rated frequency 50Hz, the number of phases be it is single-phase, range of regulation 69 ± 2 ×
2.5%kV, pressure regulation position be middle part voltage regulating, impedance voltage percentage 8%, no-load loss, no-load current, load loss be all satisfied or
Better than national standard, top-oil temperature ceiling value 55K, winding temperature rise limit value 65K, high-voltage isulation level (LI/AC) 325kV/140kV
(480kV/200kV), low-voltage insulation level (LI/AC) 40kV/18kV, high-pressure side 1.5Um/Partial discharge quantity under voltage≤
100pc, low-pressure side 1.5Um/Partial discharge quantity≤300pc under voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663128.9A CN110444380A (en) | 2019-07-22 | 2019-07-22 | 66kV voltage class Oversea wind power generation single-phase step-up transformer group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663128.9A CN110444380A (en) | 2019-07-22 | 2019-07-22 | 66kV voltage class Oversea wind power generation single-phase step-up transformer group |
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| CN110444380A true CN110444380A (en) | 2019-11-12 |
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| CN201910663128.9A Withdrawn CN110444380A (en) | 2019-07-22 | 2019-07-22 | 66kV voltage class Oversea wind power generation single-phase step-up transformer group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999613A (en) * | 2020-08-17 | 2020-11-27 | 国家电网有限公司 | Device and system for simulating arc discharge in oil by using transformer and test method thereof |
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Application publication date: 20191112 |