CN201489964U - Large-capacity arc furnace transformer - Google Patents
Large-capacity arc furnace transformer Download PDFInfo
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- CN201489964U CN201489964U CN2009201900100U CN200920190010U CN201489964U CN 201489964 U CN201489964 U CN 201489964U CN 2009201900100 U CN2009201900100 U CN 2009201900100U CN 200920190010 U CN200920190010 U CN 200920190010U CN 201489964 U CN201489964 U CN 201489964U
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Abstract
The utility model discloses a large-capacity arc furnace transformer comprising a main transformer and a regulating transformer, wherein the main transformer also comprises a main transformer high-voltage winding, a main transformer regulating winding and a main transformer low-voltage winding; the regulating transformer also comprises a regulating transformer primary winding and a regulating transformer secondary winding; the main transformer high-voltage winding adopts the triangular connection mode; and the regulating transformer secondary winding is connected with the end of the main transformer low-voltage winding in series. The high-voltage winding of the main transformer adopts the D connection mode and the whole arc furnace transformer adopts the D/d + series regulating transformer connection mode, therefore the arc furnace transformer can be controlled through a three-phase switch, the problem of serious imbalance of the three-phase current is solved at the same time, and the capacity of the transformer can be extended over 200MVA.
Description
Technical field
The utility model relates to a kind of furnace transformer, especially a kind of jumbo arc furnace transformer.
Background technology
Domestic large-scale electric furnace arc furnace transformer manufacturing at present belongs to the starting stage, and our reduction lags behind advanced country, particularly large-scale furnace transformer in this respect.Import is external basically for the above arc furnace transformer of domestic 63000KVA capacity before 2005.Began to have the arc furnace transformer of homemade 90000KVA capacity in 2006 to 2008.
But prior art exists following limitation and shortcoming: 1) D/d (the high pressure winding adopts delta connection mode low pressure winding to adopt the delta connection mode) wiring, for the large capacity electric stove transformer, the high pressure winding needs three single-phase switchs, and is uneconomical and be not easy to safeguard; 2) Y/d (the high pressure winding adopts star-star connection mode/low pressure winding to adopt the delta connection mode) wiring, for the large capacity electric stove transformer, the high pressure winding needs three single-phase switchs, and is uneconomical and be not easy to safeguard, moreover three-phase current unbalance is serious; 3) Y/d+ string modified tone pressure transformer wiring, for the large capacity electric stove transformer, though the high pressure winding only needs a threephase switch, three-phase current unbalance is serious, is only applicable to middle-size and small-size furnace transformer.That is to say that in the prior art, the high pressure winding of large-scale furnace transformer must be with three switches.Because the operation of steel-smelting electric furnace transformer switch is frequent, left and right sides switching manipulation in 3 years is inferior counts to the life-span limit value, promptly need to change, thereby both uneconomical also being not easy to is safeguarded.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of pressure regulation winding only to adopt the separate unit switch, and the big capacity arc furnace transformer of three-phase balance.
The utility model provides a kind of big capacity arc furnace transformer, comprise main transformer and voltage regulating transformer, described main transformer also comprises main transformer high pressure winding, main transformer pressure regulation winding and main transformer low pressure winding, described voltage regulating transformer also comprises winding of pressure regulation and pressure regulation secondary winding, described pressure regulation secondary winding and described main transformer low pressure winding terminal polyphone, described main transformer high pressure winding adopts the delta connection mode.
Alternatively, described main transformer pressure regulation winding adopts the star-like mode of connection, to adapt to the big capacity switch of three-phase.
Alternatively, winding of described modulation adopts the star-like mode of connection, to adapt to the connection of selected switch.
Alternatively, described modulation secondary winding adopts many cakes mode of connection in parallel, can realize big electric current winding, reduces the wastage.
Alternatively, described main transformer low pressure winding adopts many cakes mode of connection in parallel, can realize big electric current winding, reduces the wastage.
Alternatively, described main transformer also comprises on-load voltage regulating switch, and described on-load voltage regulating switch can adopt threephase switch.
Alternatively, if with main transformer pressure regulation winding, the first and last end is drawn, can be used as reactive power compensation and harmonic wave and suppress, like this, can directly be elevated to the high pressure winding voltage of transformer more high-grade (as 110kV, the 220kV electrical network), so will realize the large-scale furnace transformer of linear descending, thereby can save one-level converting equipment and facility, reach bigger energy-saving effect simultaneously.
Alternatively, since above-mentioned advantage, this novel extending in other similar industrial transformers.
The utility model only uses a threephase switch control, thereby the transformer maintenance cost is low, and is both economical, is specially adapted to big capacity on-load voltage regulation furnace transformer or similar transformer.
The high pressure winding of main transformer of the present utility model adopts the delta connection mode, can solve the serious unbalanced problem of prior art three-phase current, and transformer capacity can be extended to more than the 200MVA.Because the high pressure winding adopts the delta connection mode, compare with prior art star-star connection mode, the loss of high pressure winding reduces under equivalent material and insulation condition.
Description of drawings
Fig. 1 is a big capacity arc furnace transformer of embodiment of a utility model connection principle schematic diagram;
Fig. 2 is a big capacity arc furnace transformer of embodiment of a utility model structural representation.
Embodiment
For big capacity arc furnace transformer, adopt the D/d wiring and the Y/d mode of connection, high pressure all needs three single-phase switchs, if on the basis of preceding two kinds of connections, contact voltage regulating transformer, then: the switch capacity corresponding only is the pressure regulation capacity, therefore select suitable voltage just can satisfy the electric current of threephase switch and need not many more high-current switchs, so just can realize only with a threephase switch.But adopt the Y/d+ string modified tone pressure transformer mode of connection, though only can realize that with a threephase switch, the defective of three-phase current unbalance makes big capacity be difficult to realization.The utility model people finds: if change main transformer high pressure winding into D (triangle) connection, just adopt the D/d+ string modified tone pressure transformer mode of connection, only not only can realize with a threephase switch, and can effectively solve the defective of three-phase current unbalance, make vast capacity become possibility.
As accompanying drawing 1, an embodiment of the present utility model comprises main transformer and voltage regulating transformer, and main transformer comprises main transformer high pressure winding 101,102,103 and main transformer low pressure winding 301,302,303, and main transformer pressure regulation winding 201,202,203; Voltage regulating transformer comprises modulation winding 501,502,503 and modulation secondary winding 401,402,403.
The high pressure winding of main transformer adopts the delta connection mode, and promptly the A of high pressure winding 103 end links to each other with the Z end of high pressure winding 101, and the B end of high pressure winding 102 links to each other with the A end of high pressure winding 103, and the C end of high pressure winding 101 links to each other with the Y end of high pressure winding 102.
The main transformer low pressure winding terminal polyphone of the modulation secondary winding of voltage regulating transformer and main transformer, the head end that is modulation secondary winding 401 links to each other with the tail end of main transformer low pressure winding 301, the head end of modulation secondary winding 402 links to each other with the tail end of main transformer low pressure winding 302, and modulation secondary winding 403 head ends link to each other with the tail end of main transformer low pressure winding 303.
Main transformer pressure regulation winding adopts the star-like mode of connection.
Main transformer low pressure winding adopts many cakes mode of connection in parallel
Winding of modulation adopts the star-like mode of connection, and the tail end of winding of modulation 501,502,503 connects together.
The modulation secondary winding adopts many cakes mode of connection in parallel.
Main transformer also comprises on-load voltage regulating switch k, and the end of switch k links to each other with main transformer pressure regulation winding 201,202,203, and the other end links to each other by winding of its tap 1-11 and modulation 501,502,503, and produces voltage or electric current by the main transformer excitation.
If with main transformer pressure regulation winding 201,202,203, the first and last end is drawn, and can be used as reactive power compensation and harmonic wave and suppresses, like this, the voltage of transformer can directly can be elevated to more high-grade (as 110kV, the 220kV electrical network), so will realize the large-scale furnace transformer of linear descending, thereby can save one-level converting equipment and facility, reach bigger energy-saving effect simultaneously.
The operation principle of present embodiment is to supply with main transformer low pressure winding and winding of modulation by main transformer high pressure winding excitation, and winding excitation of modulation is supplied with the modulation secondary winding.The delta connection mode of main transformer high pressure winding makes the three-phase current can balance.
Main transformer low pressure winding output voltage and modulation secondary winding output voltage stack back output current/power.Can change the number of turn that main transformer pressure regulation winding inserts a winding of modulation by the direction that changes on-load voltage regulating switch k, thereby change the voltage of output,, also can change the voltage of output by the change of each tap wiring of switch.Because the switch capacity corresponding only for the pressure regulation capacity, is therefore selected suitable voltage just can satisfy the electric current of threephase switch and be need not many more high-current switchs, so just can realize only with a threephase switch.
As accompanying drawing 2, an embodiment of the utility model transformer also comprises: transformer conservator 1, shell 2, pin configuration 3, bushing 4, low-voltage lead row 5, temperature controller 6, pressure relief valve 7 and oil water cooler 8.Transformer conservator 1 is positioned at the top of whole transformer, for transformer provides standby oil, and temperature controller 6, pressure relief valve 7, pin configuration 3 and be used for the bushing 4 of high voltage protective and low-voltage lead row 5 is positioned at the top of shell 2; The iron core of main transformer and modulation transformer and coiling group, temperature controller 6 are positioned at shell, and oil water cooler 8 is positioned at the below of the outer transformer conservator 1 of shell.
Claims (6)
1. one kind big capacity arc furnace transformer, comprise main transformer and voltage regulating transformer, described main transformer also comprises main transformer high pressure winding, main transformer pressure regulation winding and main transformer low pressure winding, described voltage regulating transformer also comprises winding of modulation and modulation secondary winding, it is characterized in that: described main transformer high pressure winding adopts the delta connection mode, described modulation secondary winding and described main transformer low pressure winding terminal polyphone.
2. big capacity arc furnace transformer as claimed in claim 1 is characterized in that: described main transformer pressure regulation winding adopts the star-like mode of connection.
3. big capacity arc furnace transformer as claimed in claim 1 is characterized in that: winding of described modulation adopts the star-like mode of connection.
4. big capacity arc furnace transformer as claimed in claim 1 is characterized in that: described modulation secondary winding adopts many cakes mode of connection in parallel.
5. big capacity arc furnace transformer as claimed in claim 1 is characterized in that: described main transformer low pressure winding adopts many cakes mode of connection in parallel.
6. big capacity arc furnace transformer as claimed in claim 1, it is characterized in that: described main transformer also comprises on-load voltage regulating switch, but described on-load voltage regulating switch adopts threephase switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201900100U CN201489964U (en) | 2009-07-27 | 2009-07-27 | Large-capacity arc furnace transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201900100U CN201489964U (en) | 2009-07-27 | 2009-07-27 | Large-capacity arc furnace transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489964U true CN201489964U (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201900100U Expired - Fee Related CN201489964U (en) | 2009-07-27 | 2009-07-27 | Large-capacity arc furnace transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN201489964U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360848A (en) * | 2011-05-30 | 2012-02-22 | 江苏华鹏变压器有限公司 | Method for realizing high-insulation and large-current on-load voltage regulation, and regulating transformer |
| CN102867623A (en) * | 2011-07-07 | 2013-01-09 | 新疆升晟股份有限公司 | Novel electric stove transformer with compensation terminals |
| CN105390239A (en) * | 2015-11-24 | 2016-03-09 | 宜兴市兴益特种变压器有限公司 | Electric furnace transformer with oily water cooler |
-
2009
- 2009-07-27 CN CN2009201900100U patent/CN201489964U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360848A (en) * | 2011-05-30 | 2012-02-22 | 江苏华鹏变压器有限公司 | Method for realizing high-insulation and large-current on-load voltage regulation, and regulating transformer |
| CN102867623A (en) * | 2011-07-07 | 2013-01-09 | 新疆升晟股份有限公司 | Novel electric stove transformer with compensation terminals |
| CN105390239A (en) * | 2015-11-24 | 2016-03-09 | 宜兴市兴益特种变压器有限公司 | Electric furnace transformer with oily water cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20100526 Termination date: 20170727 |