CN204189592U - The constant flux voltage regulation structure of superhigh pressure self coupling power transformer - Google Patents
The constant flux voltage regulation structure of superhigh pressure self coupling power transformer Download PDFInfo
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- CN204189592U CN204189592U CN201420740415.8U CN201420740415U CN204189592U CN 204189592 U CN204189592 U CN 204189592U CN 201420740415 U CN201420740415 U CN 201420740415U CN 204189592 U CN204189592 U CN 204189592U
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- tap
- winding
- changing windings
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- voltage regulation
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Abstract
The utility model relates to autotransformer technical field, particularly relates to a kind of constant flux voltage regulation structure of superhigh pressure self coupling power transformer.This structure comprises main transformer body and voltage regulating transformer device body, main transformer body comprises series connection winding, common winding and the tertiary winding, voltage regulating transformer device body comprises and is enclosed within tap-changing windings on same iron core and field winding, series connection winding is connected with common winding again after connecting with tap-changing windings, main transformer body is also provided with an excitatory tap-changing windings, excitatory tap-changing windings and winding of connecting, common winding are enclosed within same iron core, excitatory tap-changing windings is in parallel with field winding, and excitatory tap-changing windings is provided with tap changer.The autotransformer of the constant flux voltage regulation structure that the utility model provides, can realize the connection between two supergrids, adopts constant flux voltage regulation mode, can not cause tertiary winding voltage fluctuation and iron core overexcitation; Reduce the insulation level of tap-changing windings simultaneously, reduce manufacture difficulty and the cost of shunting switch.
Description
Technical field
The utility model relates to autotransformer technical field, particularly relates to a kind of constant flux voltage regulation structure of superhigh pressure self coupling power transformer.
Background technology
Superhigh pressure self coupling power transformer is usually used in the system interconnection transformer between two extra-high voltage transmissions, if when the electrical network that it connects is extra high voltage system, then the series connection winding of this autotransformer, common winding are ultrahigh-voltage voltage grade.
If during superhigh pressure self coupling power transformer employing pressure adjusting structure, general employing common winding line end pressure regulation or neutral point pressure regulation, the pressure regulation of common winding line end is constant flux voltage regulation, and neutral point pressure regulation is variable flux voltage regulation; In view of neutral point voltage regulating mode can bring tertiary winding voltage fluctuation and overexcitation unshakable in one's determination, therefore in electrical network, more requirement adopts the pressure regulation of permanent magnetic flux line end, and so the insulation level of shunting switch depends primarily on the line end insulation level of common winding.Common winding line end insulation level is higher, then shunting switch manufacture difficulty and price higher, if the insulation level of common winding side has exceeded the manufacture level of existing switch, then no longer can adopt traditional line end pressure adjusting structure.
Summary of the invention
In order to solve the problem, the utility model proposes a kind of novel constant flux voltage regulation structure, effectively reducing the insulation level of superhigh pressure self coupling tapping switch for electric power transformer, reduce sub-connecting switch of transformer manufacture difficulty and cost.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of constant flux voltage regulation structure of superhigh pressure self coupling power transformer, comprise main transformer body and voltage regulating transformer device body, main transformer body comprises series connection winding, common winding and the tertiary winding, voltage regulating transformer device body comprises and is enclosed within tap-changing windings on same iron core and field winding, series connection winding is connected with common winding again after connecting with tap-changing windings, main transformer body is also provided with an excitatory tap-changing windings, excitatory tap-changing windings and winding of connecting, common winding is enclosed within same iron core, excitatory tap-changing windings is in parallel with field winding, excitatory tap-changing windings is provided with tap changer.
Further, the polarity selecting side of tap changer is connected with field winding head end, and the tap exit of tap changer is connected with the end of field winding.Switch gear by tap changer, control coil turn in parallel with field winding in excitatory tap-changing windings.
Main transformer and voltage regulating transformer are placed in two device bodies by the utility model, an excitatory tap-changing windings is designed in main transformer device body, this winding is independent of outside series connection winding and common winding, but be all set on same iron core with winding of connecting, common winding, its Main Function is the principal post magnetic flux set up by series connection winding and common winding electromotive force, and electromotive force is introduced the tap-changing windings in modulator body by pressure regulation ratio as required.Certain one point earth of excitatory tap-changing windings, make it current potential and be locked as earth potential, because excitatory tap-changing windings is series between series connection winding and common winding, when the tap changer gear being connected in tap-changing windings switches, the excitatory tap-changing windings number of turn sealing in series connection winding and common winding changes thereupon, causes the potential change of excitatory tap-changing windings, and the change of this electromotive force introduces modulator body by field winding in parallel with it, change the electromotive force of tap-changing windings, and then realize the function of regulation voltage.
Because tap-changing windings no longer directly accesses on-load voltage regulating switch, excitatory tap-changing windings directly accesses switch, and tap-changing windings is actual is indirectly access switch by excitatory tap-changing windings and field winding.This mode reduces the insulation level of the winding that is directly connected with switch, thus the insulation level of switch is reduced.
Further, excitatory tap-changing windings one end ground connection, so that oscillation when reducing shock test in winding.
The autotransformer of the constant flux voltage regulation structure that the utility model provides, can realize the connection between two supergrids, adopts constant flux voltage regulation mode, can not cause tertiary winding voltage fluctuation and iron core overexcitation; Reduce the insulation level of tap-changing windings simultaneously, reduce manufacture difficulty and the cost of shunting switch.
Accompanying drawing explanation
Fig. 1 is elementary diagram of the present utility model;
In figure, LV, the tertiary winding, MV, common winding, JTV, excitatory tap-changing windings, HV, series connection winding, TV, tap-changing windings, JV, field winding, K, tap changer.
Embodiment
A kind of constant flux voltage regulation structure of superhigh pressure self coupling power transformer, as shown in the figure, comprise main transformer body and voltage regulating transformer device body, main transformer body comprises series connection winding HV, common winding MV, tertiary winding LV and excitatory tap-changing windings JTV, excitatory tap-changing windings JTV independent of outside series connection winding and common winding MV, but is enclosed within same iron core with connect winding HV, common winding MV.Voltage regulating transformer device body comprises tap-changing windings TV and field winding, and tap-changing windings TV and field winding JV is enclosed within same iron core.Connect with common winding MV again after series connection winding HV connects with tap-changing windings TV, excitatory tap-changing windings JTV is in parallel with field winding JV, excitatory tap-changing windings JTV is connected with tap changer K, the polarity selecting side of tap changer K is connected with field winding JV head end, the tap exit of tap changer K is connected with the end of field winding JV, connection line middle ground.Winding between A end, X end, as a winding, connects power supply; Common winding between Am end, X end, as secondary winding, connects load.The tertiary winding is arranged in main transformer body, is enclosed within same iron core with other windings, determines whether connect load, suitably to provide voltage according to the actual service condition of transformer.
During use, after tap-changing windings adjustment puts in place, the voltage of series connection winding and common winding is constant, the electromotive force responded in excitatory tap-changing windings is also steady state value, excitatory tap-changing windings is connected with tap changer, when the gear change of tap changer, be parallel to the number of turn change of field winding, thus the electromotive force respective change of field winding, the electromotive force of tap-changing windings carries out respective change according to turn ratio simultaneously, because tap-changing windings is series between series connection winding and common winding, the tap-changing windings circle electromotive force sealed between series connection winding and common winding changes thereupon, and then (Working winding refers to transmission and changes voltage to cause Working winding, the general designation of the winding of electric energy transmitting, high tension voltage=series connection winding voltage+common winding voltage+tap-changing windings voltage) change in voltage, finally realize the function of regulation voltage.
Claims (3)
1. the constant flux voltage regulation structure of a superhigh pressure self coupling power transformer, comprise main transformer body and voltage regulating transformer device body, main transformer body comprises series connection winding (HV), common winding (MV) and the tertiary winding (LV), voltage regulating transformer device body comprises and is enclosed within tap-changing windings (TV) on same iron core and field winding (JV), series connection winding (HV) is connected with common winding (MV) again after connecting with tap-changing windings (TV), it is characterized in that: main transformer body is also provided with an excitatory tap-changing windings (JTV), excitatory tap-changing windings (JTV) and winding of connecting (HV), common winding (MV) is enclosed within same iron core, excitatory tap-changing windings (JTV) is in parallel with field winding (JV), excitatory tap-changing windings (JTV) is provided with tap changer (K).
2. the constant flux voltage regulation structure of superhigh pressure self coupling power transformer according to claim 1, it is characterized in that: the polarity selecting side of tap changer (K) is connected with field winding (JV) head end, the tap exit of tap changer (K) is connected with the end of field winding (JV).
3. the constant flux voltage regulation structure of superhigh pressure self coupling power transformer according to claim 1, is characterized in that: excitatory tap-changing windings (JTV) one end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740415.8U CN204189592U (en) | 2014-12-02 | 2014-12-02 | The constant flux voltage regulation structure of superhigh pressure self coupling power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740415.8U CN204189592U (en) | 2014-12-02 | 2014-12-02 | The constant flux voltage regulation structure of superhigh pressure self coupling power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204189592U true CN204189592U (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420740415.8U Withdrawn - After Issue CN204189592U (en) | 2014-12-02 | 2014-12-02 | The constant flux voltage regulation structure of superhigh pressure self coupling power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204189592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361984A (en) * | 2014-12-02 | 2015-02-18 | 山东电力设备有限公司 | Constant-magnetic-flux voltage regulating structure for ultrahigh-voltage self coupling electric transformer |
-
2014
- 2014-12-02 CN CN201420740415.8U patent/CN204189592U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361984A (en) * | 2014-12-02 | 2015-02-18 | 山东电力设备有限公司 | Constant-magnetic-flux voltage regulating structure for ultrahigh-voltage self coupling electric transformer |
| WO2016086828A1 (en) * | 2014-12-02 | 2016-06-09 | 山东电工电气集团有限公司 | Constant magnetic flux voltage regulating structure of ultrahigh voltage self-coupling power transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150304 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |