CN202217573U - High-voltage coil of epoxy cast dry-type transformer - Google Patents
High-voltage coil of epoxy cast dry-type transformer Download PDFInfo
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- CN202217573U CN202217573U CN2011202978716U CN201120297871U CN202217573U CN 202217573 U CN202217573 U CN 202217573U CN 2011202978716 U CN2011202978716 U CN 2011202978716U CN 201120297871 U CN201120297871 U CN 201120297871U CN 202217573 U CN202217573 U CN 202217573U
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Abstract
The utility model discloses a high-voltage coil of an epoxy cast dry-type transformer, which comprises a window, as well as a first unit and a second unit which are distributed in the window. A third section of outer coil and a fourth section of outer coil are also comprised; a head end wire of a second section of inner coil is connected with a head end wire of a first section of inner coil; a head end oblique pulling wire of a second section of outer coil is connected with an ending end wire of the second section of inner coil; a head end oblique pulling wire of a first section of outer coil is connected with an ending end wire of the first section of inner coil; an ending end wire of a first section of outer coil in the first group of the first unit is connected with an ending end wire of a first section of outer coil in a second group of the first unit; and an ending end wire of a first section of outer coil in the first group of the second unit is connected with an ending end wire of a first section of outer coil in a second group of the second unit. The utility model reduces the probability of local discharge, fundamentally solves the problem of surface creepage, and improves the reliability and the safety of the long-term operation of the transformer.
Description
Technical field
The utility model relates to a kind of high-tension coil, is specifically related to a kind of epoxy cast dry transformer high-tension coil, belongs to the power transmission and transforming equipment technical field.
Background technology
Referring to Fig. 1,35kV level epoxy cast dry transformer high-tension coil comprises window 1 and the first module 21 and second unit 22 that are distributed in the window 1 at present; First module 21 comprises that first group 211 of first module and second group of 212, the second unit 22 of first module comprise second group 222 of first group 221 of Unit second and Unit second; First group 211 of first module, second group 212 of first module, first group 221 of Unit second and Unit second include first section inner coil 31, second section inner coil 32, first section outer coil 33, second section 35, the first sections inner coil of outer coil 34 gentle guidance tapes 31, second section inner coil 32 for second group 222 and separate through air flue plate 35 and first section outer coil 33, second section outer coil 34.
Wherein, In the first module 21 and second unit 22; The head end lead 41 of second group of 212 interior first section inner coil 31 of the head end lead 41 of first group of 211 interior first section inner coil 31 of first module and first module is connected, and the head end lead 41 of second group of 222 interior first section inner coil 31 of the head end lead 41 of the first group of 221 interior first section inner coil 31 in Unit second and Unit second is connected; In second group 222 of first group 211 of first module, second group 212 of first module, first group 221 of Unit second and the Unit second; The head end lateral conductor 42 of second section inner coil 32 connects the ending end lead (not drawing among the figure) of first section inner coil 31; The head end lateral conductor 42 of first section outer coil 33 connects the ending end lead of second section inner coil 32, and the head end lateral conductor 42 of second section outer coil 34 connects the ending end lead of first section outer coil 33.
Wherein, the ending end lead of first group of 211 interior second section outer coil 34 of first module is connected with inlet wire 51; The ending end lead of first group of 221 interior second section outer coil 34 of second group 212 of first module and Unit second all is connected with pressure regulation shunting tap 52; The ending end lead of the second group of 222 interior second section outer coil 34 in Unit second is connected with outlet 53.
More than the winding method of each coil have following point:
Local voltage differences is too high, and the voltage difference at voltage difference peak A place can reach about 15000V.For resin insulation system, when voltage gradient acquires a certain degree the electric property of assurance again itself, sharply increase with the increase insulation distance of voltage gradient, A place voltage gradient is in insulation distance sharply increases the zone, and A place insulation distance is very big; If A manages and bad partial discharge will take place everywhere; Even A manages better everywhere, A place also very easily takes place along face creepagely when operation under wet environment, and long-time running along the face puncture, finally causes transformer to burn easily, influences the reliability and the fail safe of transformer long-time running.
The utility model content
Deficiency to the prior art existence; The utility model purpose provides a kind of possibility that reduces to take place partial discharge; Fundamentally solved epoxy cast dry transformer high-tension coil, thereby improved the reliability and the fail safe of transformer long-time running along the creepage problem of face.
To achieve these goals, the utility model is to realize through following technical scheme:
The utility model comprises window and the first module and the Unit second that are distributed in the window; First module comprises second group of first group of first module and first module, and Unit second comprises second group of first group of Unit second and Unit second; First group of first module, second group of first module, first group of Unit second and Unit second include first section inner coil, second section inner coil, first section outer coil, second section gentle guidance tape of outer coil for second group; First section inner coil, second section inner coil separate through air flue plate and first section outer coil, second section outer coil and also comprise the 3rd section outer coil and the 4th section outer coil; In second group of first group of first module, second group of first module, first group of Unit second and the Unit second; The head end lead of second section inner coil is connected with the head end lead of first section inner coil; The head end lateral conductor of second section outer coil connects the ending end lead of second section inner coil, and the head end lateral conductor of first section outer coil connects the ending end lead of first section inner coil; The ending end lead of first group of interior second section outer coil of first module connects the head end lateral conductor of the 3rd section outer coil; The ending end lead of the second group of interior second section outer coil in Unit second connects the head end lateral conductor of the 4th section outer coil; The ending end lead of the ending end lead of first group of interior first section outer coil of first module and second group of interior first section outer coil of first module is connected; The ending end lead of second group of interior first section outer coil of the ending end lead of the first group of interior first section outer coil in Unit second and Unit second is connected; The ending end lead of the 3rd section outer coil is connected with inlet wire; The ending end lead of the first group of interior second section outer coil in second group of first module and Unit second all is connected with the pressure regulation shunting tap; The ending end lead of the 4th section outer coil is connected with outlet.
The ending end lead of the ending end lead of first group of interior first section outer coil of above-mentioned first module and second group of interior first section outer coil of first module is connected in window through connecting line; The ending end lead of second group of interior first section outer coil of the ending end lead of the first group of interior first section outer coil in Unit second and Unit second is connected in window through connecting line.The easy making simple to operate of this method can also make voltage difference peak A place voltage drop to 7600V, even lower, improves the inner field strength distribution of high-tension coil.
The utility model makes the inner field strength distribution of high-tension coil better, has reduced the possibility of high-tension coil generation partial discharge; Reduced the voltage difference in the group, fundamentally solved, improved transformer reliability of operation and fail safe, guaranteed the safe operating life of transformer along the creepage problem of face.
Description of drawings
Fig. 1 is traditional epoxy cast dry transformer high-tension coil structural representation;
Fig. 2 is the structural representation of the utility model.
(each label among the figure: window 1, first module 21, first group 211 of first module, second group of 212, the second unit 22 of first module; 31, the second sections inner coils 32 of second group of 222, the first sections inner coil in first group of 221, the second unit, Unit second; 33, the second sections outer coils 34 of first section outer coil, 35, the three sections outer coils 36 of air flue plate; The 4th section outer coil 37, head end lead 41, head end lateral conductor 42, inlet wire 51; Pressure regulation shunting tap 52, outlet 53, connecting line 6, what A indicated among the figure is the voltage difference peak)
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with embodiment, further set forth the utility model.
The present invention includes window 1 and the 3rd section outer coil 36, the 4th section outer coil 37, first module 21 and second unit 22 of being distributed in the window 1.
First section inner coil 31 and second section inner coil 32 all separate through air flue plate 35 and first section outer coil 33 and second section outer coil 34.
The utility model mainly be change between the inner coil group, the connected mode in the group, increase the number of outer coil, change between the outer coil group, the connected mode in the group.
In second group 222 of first group 211 of first module, second group 212 of first module, first group 221 of Unit second and the Unit second; The head end lead 41 of second section inner coil 32 is connected with the head end lead 41 of first section inner coil 31; The head end lateral conductor 42 of second section outer coil 34 connects the ending end lead of second section inner coil 32, and the head end lateral conductor 42 of first section outer coil 33 connects the ending end lead of first section inner coil 31.
The ending end lead of first group of 211 interior second section outer coil 34 of first module connects the head end lateral conductor 42 of the 3rd section outer coil 36; The ending end lead of the second group of 222 interior second section outer coil 34 in Unit second connects the head end lateral conductor 42 of the 4th section outer coil 37.
The ending end lead of second group of 212 interior first section outer coil 33 of ending end lead and first module of first group of 211 interior first section outer coil 33 of first module is connected in window 1 through connecting line 6; The ending end lead of second group of 222 interior first section outer coil 33 of the ending end lead of the first group of 221 interior first section outer coil 33 in Unit second and Unit second is connected in window 1 through connecting line 6.The easy making simple to operate of this method can also make voltage difference peak A place voltage drop to 7600V, even lower, improves the inner field strength distribution of high-tension coil.
The ending end lead of the 3rd section outer coil 36 is connected with inlet wire 51; The ending end lead of first group of 221 interior second section outer coil 34 of second group 212 of first module and Unit second all is connected with pressure regulation shunting tap 52; The ending end lead of the 4th section outer coil 37 is connected with outlet 53.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (2)
1. an epoxy cast dry transformer high-tension coil comprises window (1) and is distributed in first module (21) and Unit second (22) in the window (1);
Said first module (21) comprises first module first group of (211) and second group of first module (212), and said Unit second (22) comprises Unit second first group of (221) and second group of Unit second (222);
Said first module first group of (211), first module second group of (212), Unit second first group (221) and Unit second second group (222) include first section inner coil (31), second section inner coil (32), first section outer coil (33), the gentle guidance tape of second section outer coil (34) (35); Said first section inner coil (31), second section inner coil (32) separate through air flue plate (35) and first section outer coil (33), second section outer coil (34); It is characterized in that
Also comprise the 3rd section outer coil (36) and the 4th section outer coil (37),
In said first module first group (211), first module second group (212), Unit second first group (221) and the Unit second second group (222); The head end lead (41) of said second section inner coil (32) is connected with the head end lead (41) of first section inner coil (31); The head end lateral conductor (42) of said second section outer coil (34) connects the ending end lead of second section inner coil (32), and the head end lateral conductor (42) of said first section outer coil (33) connects the ending end lead of first section inner coil (31);
The ending end lead of first group of (211) interior second section outer coil of said first module (34) connects the head end lateral conductor (42) of the 3rd section outer coil (36); The ending end lead of said second group of (222) the interior second section outer coil in Unit second (34) connects the head end lateral conductor (42) of the 4th section outer coil (37);
The ending end lead of second group of (212) interior first section outer coil of ending end lead and first module (33) of first group of (211) interior first section outer coil of said first module (33) is connected; The ending end lead of said first group of (221) the interior first section outer coil in Unit second (33) is connected with the ending end lead of second group of (222) the interior first section outer coil in Unit second (33);
The ending end lead of said the 3rd section outer coil (36) is connected with inlet wire (51); The ending end lead of said first module second group (212) and first group of (221) the interior second section outer coil in Unit second (34) all is connected with pressure regulation shunting tap (52); The ending end lead of said the 4th section outer coil (37) is connected with outlet (53).
2. epoxy cast dry transformer high-tension coil according to claim 1; It is characterized in that the ending end lead of second group of (212) interior first section outer coil of ending end lead and first module (33) of first group of (211) interior first section outer coil of said first module (33) is connected in window (1) through connecting line (6);
The ending end lead of said first group of (221) the interior first section outer coil in Unit second (33) is connected in window (1) through connecting line (6) with the ending end lead of second group of (222) the interior first section outer coil in Unit second (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202978716U CN202217573U (en) | 2011-08-16 | 2011-08-16 | High-voltage coil of epoxy cast dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202978716U CN202217573U (en) | 2011-08-16 | 2011-08-16 | High-voltage coil of epoxy cast dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202217573U true CN202217573U (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202978716U Expired - Lifetime CN202217573U (en) | 2011-08-16 | 2011-08-16 | High-voltage coil of epoxy cast dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202217573U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105719814A (en) * | 2016-04-08 | 2016-06-29 | 国家电网公司 | High voltage coil which is applicable to a dry type transformer of more than 35kV and contains an airway structure |
| CN106158353A (en) * | 2016-08-25 | 2016-11-23 | 宁波奥克斯高科技有限公司 | A kind of winding method of high-tension coil |
| CN109817424B (en) * | 2017-11-22 | 2021-06-08 | 许继变压器有限公司 | Arc suppression coil winding method and arc suppression coil using same |
-
2011
- 2011-08-16 CN CN2011202978716U patent/CN202217573U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105719814A (en) * | 2016-04-08 | 2016-06-29 | 国家电网公司 | High voltage coil which is applicable to a dry type transformer of more than 35kV and contains an airway structure |
| CN106158353A (en) * | 2016-08-25 | 2016-11-23 | 宁波奥克斯高科技有限公司 | A kind of winding method of high-tension coil |
| CN109817424B (en) * | 2017-11-22 | 2021-06-08 | 许继变压器有限公司 | Arc suppression coil winding method and arc suppression coil using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |
|
| CX01 | Expiry of patent term |