CN212434451U - Voltage compensation structure of variable magnetic flux voltage regulating autotransformer third winding and transformer - Google Patents
Voltage compensation structure of variable magnetic flux voltage regulating autotransformer third winding and transformer Download PDFInfo
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- CN212434451U CN212434451U CN202021052485.6U CN202021052485U CN212434451U CN 212434451 U CN212434451 U CN 212434451U CN 202021052485 U CN202021052485 U CN 202021052485U CN 212434451 U CN212434451 U CN 212434451U
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Abstract
The utility model relates to a become voltage compensation structure of magnetic flux voltage regulation autotransformer third winding sets up first compensation winding, second compensation winding in the compensating transformer ware body, establishes ties third winding in the main part transformer ware body with first compensation winding, second compensation winding. The utility model discloses still relate to a become magnetic flux voltage regulation autotransformer, use the voltage compensation structure of foretell third winding, include: the main transformer body and the compensation transformer body are arranged in an oil tank. The utility model ensures the voltage of the third winding to be constant, and the voltage fluctuation of the third winding can not be caused; the voltage regulation by variable magnetic flux is adopted, the voltage to earth of a voltage regulating winding is effectively reduced, and the insulation level of a tap switch of the ultrahigh-voltage self-coupling power transformer is effectively reduced; and the short-circuit resistance between the third winding and the series winding and between the third winding and the common winding are improved, so that the short-circuit resistance of the third winding is improved.
Description
Technical Field
The utility model belongs to the technical field of power transformer manufacturing, concretely relates to voltage compensation structure and transformer of change magnetic flux voltage regulation autotransformer third winding.
Background
The extra-high voltage autotransformer is commonly used as a connection transformer between two extra-high voltage transmission systems, and when the connected power grids are all extra-high voltage systems, the series winding and the common winding of the autotransformer are all extra-high voltage levels.
The voltage regulating structure of the traditional ultrahigh voltage self-coupling power transformer generally adopts a common winding wire end voltage regulating mode. With the improvement of the voltage grade of the common winding, the manufacturing difficulty and the price of the transformer tap switch are higher, and when the insulation level of the common winding exceeds the manufacturing level of the existing switch, the conventional line end voltage regulating structure is not applicable any more; if a neutral point voltage regulation mode is adopted, the voltage regulation winding is connected in series with the tail ends of the series winding and the common winding, and when the gear of the switch is changed, in order to keep the voltage of the series winding and the voltage of the common winding constant, the magnetic flux in the iron core is changed along with the adjustment of the gear of the switch, so that the voltage fluctuation of the third winding can be caused. In addition, in order to improve the short circuit resistance of the third winding, the capacity of the third winding needs to be increased, which increases the manufacturing cost of the transformer.
Disclosure of Invention
For solving this a series of technical problem, the utility model provides a become voltage compensation structure of magnetic flux pressure regulating autotransformer third winding, the voltage of third winding is invariable when this structure can realize that super high voltage autotransformer becomes the magnetic flux pressure regulating, and the third winding can reach more than 200% with the short circuit impedance of series connection winding, third winding and common winding simultaneously, has improved the anti short circuit ability of third winding. The utility model discloses the technical scheme who adopts as follows:
the voltage compensation structure of the third winding of the variable-flux voltage-regulating autotransformer is characterized in that a first compensation winding and a second compensation winding are arranged in a compensation transformer body, the main transformer body is sleeved on an iron core column of a main transformer, and the third winding in the main transformer body is connected with the first compensation winding and the second compensation winding in series. The first compensation winding, the second compensation winding and the third winding are connected in series, and the voltage of the compensation winding just can compensate the voltage fluctuation of the third winding caused by neutral point voltage regulation, so that the voltage of the third winding is ensured to be constant.
Become magnetic flux voltage regulation autotransformer, the voltage compensation structure of foretell third winding of application, become magnetic flux voltage regulation autotransformer include: the main transformer body and the compensation transformer body are arranged in an oil tank.
Preferably, the main body structure of the main body transformer body comprises from inside to outside: third winding, voltage regulating winding, common winding and series winding.
Preferably, the gaps between the third winding and the core limb and between the windings are filled with cardboard or stays.
Preferably, the compensating transformer body comprises 2 columns named as a first compensating transformer column and a second compensating transformer column; the main structure of the first compensation transformer column comprises from inside to outside: the first excitation winding and the first compensation winding are arranged on the first coil; the main structure of the second compensation transformer column comprises from inside to outside: a second excitation winding and a second compensation winding.
Preferably, the first excitation winding and the second excitation winding of the compensation transformer body are connected in parallel with the tapping gear of the voltage regulating winding of the main transformer body. The main function of the transformer is to lead the potential into the compensation winding in the body of the compensation transformer according to the proportion of the number of turns of the voltage regulating winding which is connected in series into the common winding.
The utility model relates to a become voltage compensation structure of magnetic flux voltage regulation autotransformer third winding has following advantage at least:
the third winding adopts a voltage compensation structure for variable magnetic flux voltage regulation, and the voltage of the third winding is compensated, so that the voltage of the third winding is ensured to be constant, and the voltage fluctuation of the third winding is avoided;
the voltage regulation by variable magnetic flux is adopted, the voltage to earth of a voltage regulating winding is effectively reduced, the insulation level of the tap switch of the ultrahigh voltage self-coupling power transformer is effectively reduced, the voltage regulation of the tap switch with lower insulation level can be completed, the manufacturing difficulty and price of the tap switch are reduced, and the cost of the transformer is further reduced;
the short-circuit impedance of the third winding and the series winding and the short-circuit impedance of the third winding and the common winding can be improved by improving the short-circuit impedance of the compensation transformer, and the short-circuit resistance of the third winding is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.
Fig. 1 is a schematic diagram of the third winding voltage compensation according to the embodiment of the present invention;
in the figure, 1-a main transformer body, 2-a compensation transformer body, 3-a series winding, 4-a common winding, 5-a voltage regulating winding, 6-a third winding, 7-a first compensation winding, 8-a second compensation winding, 9-a first excitation winding and 10-a second excitation winding.
Detailed Description
The following detailed description of embodiments of the present invention is made with reference to the accompanying drawings:
in the existing variable magnetic flux voltage regulating autotransformer, the magnetic fluxes of a main transformer body 1 and a compensation transformer body 2 are relatively independent, and a voltage regulating winding 5 of the main transformer is connected in parallel with a first excitation winding 9 and a second excitation winding 10 of the compensation transformer. The regulating winding 5 of the main transformer is located at the end of the common winding 4, which causes a change in the magnetic flux density in the core (variable flux regulation) when the switch is shifted, resulting in a voltage fluctuation in the third winding 6. In order to make the voltage of the third winding 6 constant, it is necessary to design a compensation winding in series with the third winding for compensating for fluctuations in the voltage of the third winding.
As shown in fig. 1, it is a schematic diagram of the third winding voltage compensation according to the embodiment of the present invention. A voltage compensation structure of a third winding of a variable magnetic flux voltage regulating autotransformer is characterized in that a first compensation winding 7 and a second compensation winding 8 are arranged in a compensation transformer body 2, and the third winding 6 in a main transformer body 1 is respectively connected with the first compensation winding 7 and the second compensation winding 8 in series. The first compensation winding 7, the second compensation winding 8 and the third winding 6 are connected in series, and finally play a role in compensating the potential fluctuation of the third winding 6.
A become magnetic flux voltage regulation autotransformer, the voltage compensation structure of foretell third winding of application, become magnetic flux voltage regulation autotransformer include: the main transformer body 1 and the compensation transformer body 2 are arranged in an oil tank, the relative position relationship between the main transformer body 1 and the compensation transformer body 2 can be randomly arranged according to application requirements, and the only requirement principle is that the total volume of the transformer is smaller and the cost is lower.
Main part transformer ware body 1 suit on main part transformer core post, main part transformer ware body 1's major structure includes by inside to outside: the third winding 6, the voltage regulating winding 5, the common winding 4 and the series winding 3, and gaps between the third winding 6 and the iron core column and between the windings are filled with insulating materials such as paperboards and supporting strips.
The compensating transformer body 2 comprises 2 columns named as a first compensating transformer column and a second compensating transformer column. The main structure of the first compensation transformer column comprises from inside to outside: a first excitation winding 9 and a first compensation winding 7; the main structure of the second compensation transformer column comprises from inside to outside: a second excitation winding 10 and a second compensation winding 8.
The third winding 6 in the main transformer body 1 is respectively connected in series with the first compensation winding 7 and the second compensation winding 8. The first excitation winding 9 and the second excitation winding 10 of the compensation transformer body 2 are connected in parallel with the tapping gear of the regulating winding 5 of the main transformer body 1.
The voltage regulating winding 5, the series winding 3 and the common winding 4 in the main transformer are sleeved on the same iron core, the potential of the windings can be changed by adjusting the turns of the voltage regulating winding in the same proportion, and the change of the potential is introduced into the compensating transformer through the first exciting winding 9 and the second exciting winding 10 which are connected with the compensating transformer in parallel, so that the potential of the compensating winding is changed. The first compensation winding 7, the second compensation winding 8 and the third winding 6 are connected in series, and finally play a role in compensating the potential fluctuation of the third winding 6, so that the main transformer body 1 is related to the potential of the compensation transformer body 2.
Finally, it is to be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (6)
1. The voltage compensation structure of the variable magnetic flux voltage regulating autotransformer third winding is characterized in that a first compensation winding (7) and a second compensation winding (8) are arranged in a compensation transformer body (2), the main transformer body (1) is sleeved on a main transformer core column, and the third winding (6) in the main transformer body (1) is connected with the first compensation winding (7) and the second compensation winding (8) in series.
2. The variable magnetic flux voltage regulating autotransformer is characterized in that the voltage compensation structure of the third winding in claim 1 is applied, and the variable magnetic flux voltage regulating autotransformer comprises: the main transformer body (1) and the compensation transformer body (2) are arranged in an oil tank.
3. The variable magnetic flux and voltage regulating autotransformer according to claim 2, wherein the main body structure of the main body transformer body (1) comprises from inside to outside: the third winding (6), the voltage regulating winding (5), the common winding (4) and the series winding (3).
4. The variable magnetic flux and voltage regulating autotransformer according to claim 3, wherein gaps between the third winding (6) and the core limb and between the windings are filled with cardboard or stays.
5. The variable magnetic flux and voltage regulating autotransformer according to claim 4, wherein the compensating transformer body (2) comprises: the first compensation transformer column and the second compensation transformer column; the main structure of the first compensation transformer column comprises from inside to outside: a first excitation winding (9) and a first compensation winding (7); the main structure of the second compensation transformer column comprises from inside to outside: a second excitation winding (10) and a second compensation winding (8).
6. The variable magnetic flux and voltage regulating autotransformer according to claim 5, wherein the first excitation winding (9) and the second excitation winding (10) of the compensation transformer body (2) are connected in parallel with the tapping gear of the voltage regulating winding (5) of the main transformer body (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021052485.6U CN212434451U (en) | 2020-06-09 | 2020-06-09 | Voltage compensation structure of variable magnetic flux voltage regulating autotransformer third winding and transformer |
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| CN202021052485.6U CN212434451U (en) | 2020-06-09 | 2020-06-09 | Voltage compensation structure of variable magnetic flux voltage regulating autotransformer third winding and transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816426A (en) * | 2020-06-09 | 2020-10-23 | 山东电力设备有限公司 | Voltage compensation structure of variable magnetic flux voltage regulating autotransformer third winding and transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816426A (en) * | 2020-06-09 | 2020-10-23 | 山东电力设备有限公司 | Voltage compensation structure of variable magnetic flux voltage regulating autotransformer third winding and transformer |
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