CN101984499A - Three-phase generator transformer with super-large capacity - Google Patents
Three-phase generator transformer with super-large capacity Download PDFInfo
- Publication number
- CN101984499A CN101984499A CN 201010227676 CN201010227676A CN101984499A CN 101984499 A CN101984499 A CN 101984499A CN 201010227676 CN201010227676 CN 201010227676 CN 201010227676 A CN201010227676 A CN 201010227676A CN 101984499 A CN101984499 A CN 101984499A
- Authority
- CN
- China
- Prior art keywords
- low
- voltage coil
- branch
- transformer
- coil branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a three-phase generator transformer with super-large capacity, which comprises an iron core, a low-voltage coil and a high-voltage coil and is characterized in that the low-voltage coil is divided into a first low-voltage coil branch and a second low-voltage coil branch which are connected in series, and the number of turns of the first low-voltage coil branch is equal to the number of turns of the second low-voltage coil branch; the iron core, the first low-voltage coil branch, the second low-voltage coil branch and the high-voltage coil are sequentially arranged from the inside to the outside; the two series branches namely the first low-voltage coil branch and the second low-voltage coil branch of the low-voltage coil are respectively in a double-layer multi-spiral structure formed by integrally winding self-adhesive transposed conductors; and the first low-voltage coil branch and the second low-voltage coil branch are separated by an oil clearance brace and an insulating cylinder. The invention not only can obviously lower the transport height of the transformer but also can well solve the problem of magnetic leakage inhibition of low-voltage super-large current leads, thereby improving the economy and the practicability of the three-phase generator transformer with super-large capacity.
Description
Technical field
The invention belongs to field transformer, relate to a kind of high-capacity threephase generator transformer.
Background technology
Stipulate at power department industry standard DL-5000-2000 " thermal power plant designing technique rules ": " with capacity is the main transformer that 300MW and following unit unit are connected, if be not subjected to the restriction of transportation condition, should select three-phase transformer for use.With capacity is the main transformer that 600MW unit unit is connected, should comprehensively transport and create conditions, through economy and technology relatively after, select for use single-phase or three-phase transformer." for supporting 370MVA of 300MW generating set and above transformer, we are referred to as " high-capacity generator transformer " usually.
The high-capacity generator transformer is made three-phase transformer and is compared with the three-phase transformer group of making the single-phase transformer composition, aspect economy and technology two, occupies clear superiority as described below:
1. three-phase transformer efficient height, under equal load loss and when using the silicon steel sheet of equal material, three-phase transformer is than the no-load loss low about 20% of Single Phase Transformer Set;
2. the three-phase transformer occupied ground is little, and the power plant's planning that helps being becoming tight current land used day is arranged, has saved a large amount of land resource and civil engineering costs;
3. the breakthrough of three-phase transformer insulating oil is few, and three-phase transformer lacks than 3 Single Phase Transformer Set maintenance and maintenance cost, and product maintenance is more convenient;
4. three-phase transformer has avoided single-phase transformer must use isolated-phase enclosed bus to finish the connection of connection set, can save a large amount of isolated-phase enclosed bus;
When 5. there is three-phase imbalance in single-phase transformer in actual motion, may produce magnetic oscillation, have accident potential;
6. the low cost of manufacture of three-phase transformer can significantly reduce the one-time investment of power plant more than 20%.
Therefore, the three-phase transformer structure is the first-selected pattern of high-capacity generator transformer.But transportation problem is the key factor of selecting for use three-phase transformer to consider.The transportation high-power transformer is the transformer of 360MVA and above capacity especially, and difficulty is very big, mainly is subjected to the influence of factors such as shipping mass, height and width, wherein the normally topmost factor of shipping height.
Means of transportation has railway transportation, highway transportation and water route to transport these three kinds usually.Railway transportation is subjected to the restriction of factors such as bridge, railway load-bearing and railway culvert; Highway transportation then is subjected to the restriction of factors such as bridge, roadbed, haulage vehicle; When power plant build riverside or seashore in, can adopt sea-freight or water transport, but consider manufactory to the transportation condition that closes on the harbour, interim highway or railway transportation still are difficult to avoid usually.With the highway transportation is example, in many bridges and tunnel, 4.5～4.8 meters limitation in height is arranged all, and when adopting conventional coil arrangement structure when (as shown in Figure 2), the height of transformer is difficult to meet the demands; The SFP10-370000/220 transformer made from current domestic large manufacturer is an example, when adopting conventional structure, its fuel tank inner chamber free height is near 3.9 meters, add load steel structure height at the bottom of the top box, consider the height of haulage vehicle body again, total height may transfinite, and situation more very when capacity is bigger; This will make takes other ancillary method in highway or the railway transport course, causes cost of transportation to increase.Therefore, for high-capacity threephase generator transformer, reduce its shipping height and have very important realistic meaning.
In addition, when the high-capacity generator transformer adopts three-phase integrated structure since the capacity of this transformer often reach 370MVA and more than, and the low-pressure side pusher side output voltage voltage that promptly generates electricity is generally about 20 kilovolts, its electric current reaches amperes up to ten thousand; The connection of low-pressure side is delta connection normally, lifting one's head of low-voltage coil first and last end all need be drawn in the low-tension bushing rising seat that is connected to fuel tank top; When adopting conventional coil arrangement structure when (as shown in Figure 2), the terminal B of low-voltage coil lifts one's head in the coil bottom, when drawing in the process that connects to fuel tank top low pressure rising seat by copper pipe or copper bar, huge current like this, to produce very important leakage field effect in the zone of its process, in contiguous steel construction piece, will produce up to the additional stray loss of tens of multikilowatts and cause the obvious heating of structural member, for suppressing this additional loss or overheatedly then need using large-area low magnetic steel plate, the go between means such as distance of fuel tank of thickening magnetic screen or increasing, and these means effects are not thoroughly and will obviously increase the manufacturing cost of three-phase transformer.Therefore, the leakage field inhibition problem of the especially big current feed of low pressure is the key factor that influences high-capacity threephase generator transformer economy.
Therefore, be necessary to study a kind of new structure that is applicable to high-capacity threephase generator transformer, can significantly reduce the transformer shipping height, the leakage field that can solve the especially big current feed of low pressure again well suppresses problem.
Summary of the invention
The objective of the invention is to provide a kind of and can significantly reduce the transformer shipping height, the leakage field that can solve the especially big current feed of low pressure again well suppresses the high-capacity threephase generator transformer of problem.
In order to achieve the above object, technical scheme of the present invention is: a kind of high-capacity threephase generator transformer, comprise iron core, low-voltage coil and high-tension coil, its improvement is: described low-voltage coil is divided into the series branch of the numbers of turn such as two, be respectively the first low-voltage coil branch and the second low-voltage coil branch; Iron core, the first low-voltage coil branch, the second low-voltage coil branch and high-tension coil are arranged in order from inside to outside.
The first low-voltage coil branch of two series branches of low-voltage coil and the second low-voltage coil branch are the double-deck many helical structures that adopt the tack winding transposition wire, and make for the integraty coiling, separate by oil clearance stay and insulating cylinder between the first low-voltage coil branch and the second low-voltage coil branch.
The winding protruding head of the head end of low-voltage coil and end is all on low-voltage coil top.
The total number of turns of low-voltage coil is the even number circle.
After the present invention adopted this loop construction, the structure (as shown in Figure 2) with respect to the employing monomer low-voltage coil of routine can significantly reduce the transformer shipping height, and the leakage field that can solve the especially big current feed of low pressure again well suppresses problem.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a high-capacity generator transformer coil arrangement conventional structure schematic diagram.
Embodiment
Below contrast accompanying drawing,, the present invention made further specifying by the description of embodiment.
As shown in Figure 1, a kind of high-capacity threephase generator transformer comprises unshakable in one's determination 1, low-voltage coil L and high-tension coil 4, and described low-voltage coil L is divided into the series branch of the numbers of turn such as two, is respectively the first low-voltage coil branch 2 and the second low-voltage coil branch 3; 1, the first low-voltage coil branch 2 unshakable in one's determination, the second low-voltage coil branch 3 and high-tension coil 4 are arranged in order from inside to outside.
For the high-power transformer of specified volume, connection, impedance, loss,, can there be countless technical schemes all can meet the demands in theory in order to realize the technical performance of appointment.Impedance computation formula according to two-winding transformer, with respect to conventional structure, bigger core-diameter when choosing, when taking loop construction of the present invention, the iron core of transformer and coiler part profile level off to the pyknic structure, be silicon steel sheet large usage quantity and the copper cash consumption is less, and can satisfy all technical performance requirements that comprise impedance, loss equally, thereby and the reactance height that will significantly reduce transformer reduce shipping height; Be that 10-370000/220 is an example with the S that reaches mentioned above equally, when adopting loop construction of the present invention, under the prerequisite that satisfies equal impedance loss performance, the core dimensions of the diameter of selecting for use big 10%, as calculated, 3.4 meters of last fuel tank inner chamber clear height less thaies have descended 0.5 meter.This shows that the effect of structure reduction transformer shipping height of the present invention is fairly obvious.
The first low-voltage coil branch 2 of two series branches of low-voltage coil L and the second low-voltage coil branch 3 adopt the double-deck multispiral structural shape of tack winding transposition wire, can make by the integraty coiling, separate by oil clearance stay and insulating cylinder between the first low-voltage coil branch 2 and the second low-voltage coil branch 3.That is: after the regulation number of turn of the intact first low-voltage coil branch 2 of coiling, after its outside is installed outer stay, one deck insulating cylinder, interior stay successively, can lift one's head that to make oppositely " S " curved with each of the first low-voltage coil branch 2 and around lead, then back-roll is to the second low-voltage coil branch 3 in the coiling outside, until finishing the regulation number of turn.Because in the high-capacity generator transformer, the rated voltage of low-voltage coil L is generally 20 kilovolts of levels, belongs to lower voltage, so the insulation system that adopts two stay oil clearances to add one deck insulating cylinder between two series branches of low-voltage coil L is enough.This splitted construction is with respect to the low-voltage coil L single structure of routine, because many two oil clearances between branch, for the bigger coil of the radial width of high-capacity transformer, can play the effect that is equivalent to axial oil duct, can effectively reduce low-voltage coil L temperature rise.Consider the accuracy of the manufacturing process and the electric number of turn, the total number of turns of low-voltage coil L is taken as the even number circle.
The winding protruding head of the head end of low-voltage coil L and end is convenient to lead to the outlet sleeve pipe on fuel tank top all on coil top.
As shown in Figure 1, in this new structure, the head of low-voltage coil L, end are lifted one's head all on coil top, reduce the especially big current feed of conventional structure mesolow and drawn the process that is connected to coil top from the bottom, leakage field heating and loss that this process causes have been eliminated, the length of low-voltage lead also shortens thereupon greatly, has also reduced the lead-in wire loss after the saving material.。
In sum, high-capacity threephase generator transformer of the present invention, can significantly reduce the transformer shipping height, the leakage field that can solve the especially big current feed of low pressure again well suppresses problem, promote high-capacity threephase generator Transformer Economic and practicality, realized the effect of energy saving and cost lowering.
Claims (4)
1. high-capacity threephase generator transformer, comprise iron core (1), low-voltage coil (L) and high-tension coil (4), it is characterized in that: described low-voltage coil (L) is divided into the series branch of the numbers of turn such as two, is respectively the first low-voltage coil branch (2) and the second low-voltage coil branch (3); Described iron core (1), the first low-voltage coil branch (2), the second low-voltage coil branch (3) and high-tension coil (4) are arranged in order from inside to outside.
2. high-capacity threephase generator transformer according to claim 1, it is characterized in that: the first low-voltage coil branch (2) of two series branches of low-voltage coil (L) and the second low-voltage coil branch (3) are the double-deck many helical structures that adopt the tack winding transposition wire, and make for the integraty coiling, separate by oil clearance stay and insulating cylinder between the first low-voltage coil branch (2) and the second low-voltage coil branch (3).
3. high-capacity threephase generator transformer according to claim 1 is characterized in that: the winding protruding head of the head end (A) of low-voltage coil (L) and terminal (B) is all on low-voltage coil (L) top.
4. high-capacity threephase generator transformer according to claim 1 is characterized in that: the total number of turns of low-voltage coil (L) is the even number circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102276766A CN101984499B (en) | 2010-07-16 | 2010-07-16 | Three-phase generator transformer with super-large capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102276766A CN101984499B (en) | 2010-07-16 | 2010-07-16 | Three-phase generator transformer with super-large capacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101984499A true CN101984499A (en) | 2011-03-09 |
| CN101984499B CN101984499B (en) | 2012-07-11 |
Family
ID=43641669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102276766A Expired - Fee Related CN101984499B (en) | 2010-07-16 | 2010-07-16 | Three-phase generator transformer with super-large capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101984499B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420046A (en) * | 2011-11-02 | 2012-04-18 | 杭州钱江电气集团股份有限公司 | Double-voltage transformer |
| CN103050241A (en) * | 2012-12-24 | 2013-04-17 | 保定天威保变电气股份有限公司 | Split type zigzag-shaped coupling transformer |
| CN106449070A (en) * | 2016-09-30 | 2017-02-22 | 宁波三星医疗电气股份有限公司 | Current transformer and coil winding method thereof |
| CN109326426A (en) * | 2017-08-01 | 2019-02-12 | 特变电工沈阳变压器集团有限公司 | A kind of AT power supply tractive transformer low-voltage coil structure and winding method |
| CN110648821A (en) * | 2019-10-31 | 2020-01-03 | 江苏思源赫兹互感器有限公司 | Transformer for station |
| CN111681861A (en) * | 2020-06-19 | 2020-09-18 | 山东电力设备有限公司 | Low-voltage coil structure for double-voltage star-delta conversion and split transformer thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533005A (en) * | 1978-08-29 | 1980-03-08 | Hitachi Ltd | Transformer |
| JPS62192618U (en) * | 1986-05-28 | 1987-12-08 | ||
| CN2857174Y (en) * | 2005-09-09 | 2007-01-10 | 特变电工沈阳变压器集团有限公司技术中心 | Dual-layer spiral coil layered stay limiter of liquid-immersed power transformer |
-
2010
- 2010-07-16 CN CN2010102276766A patent/CN101984499B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5533005A (en) * | 1978-08-29 | 1980-03-08 | Hitachi Ltd | Transformer |
| JPS62192618U (en) * | 1986-05-28 | 1987-12-08 | ||
| CN2857174Y (en) * | 2005-09-09 | 2007-01-10 | 特变电工沈阳变压器集团有限公司技术中心 | Dual-layer spiral coil layered stay limiter of liquid-immersed power transformer |
Non-Patent Citations (1)
| Title |
|---|
| 《电力变压器手册》 20030228 谢毓城 8.2.4换位导线、8.3.1.4绕组中的绝缘、13.4.1.4螺旋式绕组的绕制 248-489、521-522 1-4 , 1 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420046A (en) * | 2011-11-02 | 2012-04-18 | 杭州钱江电气集团股份有限公司 | Double-voltage transformer |
| CN103050241A (en) * | 2012-12-24 | 2013-04-17 | 保定天威保变电气股份有限公司 | Split type zigzag-shaped coupling transformer |
| CN106449070A (en) * | 2016-09-30 | 2017-02-22 | 宁波三星医疗电气股份有限公司 | Current transformer and coil winding method thereof |
| CN109326426A (en) * | 2017-08-01 | 2019-02-12 | 特变电工沈阳变压器集团有限公司 | A kind of AT power supply tractive transformer low-voltage coil structure and winding method |
| CN110648821A (en) * | 2019-10-31 | 2020-01-03 | 江苏思源赫兹互感器有限公司 | Transformer for station |
| CN111681861A (en) * | 2020-06-19 | 2020-09-18 | 山东电力设备有限公司 | Low-voltage coil structure for double-voltage star-delta conversion and split transformer thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101984499B (en) | 2012-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101984499B (en) | Three-phase generator transformer with super-large capacity | |
| CN105719799B (en) | A kind of transformer with split winding | |
| CN106783045A (en) | A kind of horizontal integration pole type transformer platform for collecting power transformation box and comprehensive distribution box composition | |
| WO2013078845A1 (en) | Single phase transformer | |
| CN110491659A (en) | 66kV(110kV) voltage class wind power generation boosting transformer | |
| CN102315007B (en) | Single-phase ultra-high-capacity nuclear power station transformer | |
| CN201845649U (en) | Oil-immersed dual-voltage on-load voltage regulating transformer | |
| CN101968990A (en) | High-voltage station transformer with special impedance | |
| CN101640120A (en) | Transformer changing from three phases to single phase | |
| CN104158183B (en) | A kind of serial connection capacitor compensating device using the parallel damping reactor of flat bed | |
| CN217847642U (en) | Ultra-large-capacity mobile transformer | |
| CN206364421U (en) | Low pressure six divides environment-friendly type photovoltaic generation preassembled transformer station | |
| CN203179662U (en) | Dry type transformer | |
| CN201765932U (en) | Single-phase traction transformer for three-phase VX connection of AT power supply mode | |
| CN101982860B (en) | Common box traction transformer with four low-voltage winding layers for AT power supply | |
| CN208834842U (en) | Low-loss is box around coil transformer | |
| CN103106998A (en) | Oil-immersed transformer | |
| CN110444380A (en) | 66kV voltage class Oversea wind power generation single-phase step-up transformer group | |
| CN102360805A (en) | Energy saving type amorphous alloy distribution transformer | |
| CN207718979U (en) | A kind of stainless steel stepwise adjustable resistance and modulated brake resistance | |
| CN207338099U (en) | Exceed loading capability transformer | |
| CN102570329A (en) | 66kv side structure of compact 500kv main transformer | |
| CN100525069C (en) | Less stage multiple increasing volume type high and medium voltage variable frequency speed regulating integrated device | |
| CN205564508U (en) | Large -scale dry -type on -load voltage regulation power transformer high -pressure coil structure of 35kV | |
| CN204680533U (en) | A kind of magnetic screen arrangement of oil tank of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 213000 NO. 8, XINFU ROAD, TIANNING DISTRICT, CHANGZHOU CITY, JIANGSU PROVINCE TO: 213021 NO. 8, XINFU ROAD, CHANGZHOU CITY, JIANGSU PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110414 Address after: 213021 Jiangsu city in Changzhou Province, the new road No. 8 Applicant after: Jiangsu Sunel Transformer Co., Ltd. Address before: 213000 Jiangsu Province, Changzhou Tianning New Road No. 8 Applicant before: Jiangsu Sunel Transformer Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20170716 |