CN218414239U - Flexible spare transformer - Google Patents
Flexible spare transformer Download PDFInfo
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- CN218414239U CN218414239U CN202222169640.8U CN202222169640U CN218414239U CN 218414239 U CN218414239 U CN 218414239U CN 202222169640 U CN202222169640 U CN 202222169640U CN 218414239 U CN218414239 U CN 218414239U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a flexible standby transformer, it includes series winding, public winding, voltage regulating winding and low voltage winding, low voltage winding is located iron core and voltage regulating winding intermediate position, and public winding is located series winding and voltage regulating winding intermediate position, the series winding end is connected with first off-circuit tap-changer, and the voltage regulating winding is connected with second off-circuit tap-changer, high school's series connection adjustable reactor has been concatenated between series winding and the voltage regulating winding; the utility model discloses a can be for single-phase auto transformer set production flexible spare parts under the specific capacity, for a certain province or a certain region provides the emergent spare parts of transformer under the circumstances that satisfies certain economic nature, reduce the off-time of transformer, ensured the safety and stability operation of transformer, this transformer can solve the emergent difficult problem of present electric wire netting transformer spare parts, and the practicality is stronger, is fit for being extensively promoted and uses.
Description
Technical Field
The utility model belongs to the technical field of power equipment, specifically be a flexible spare transformer.
Background
The transformer is static electrical equipment used for transforming alternating voltage and current to transmit alternating current energy, and realizes electric energy transmission according to the principle of electromagnetic induction; transformers can be classified into power transformers, test transformers, instrument transformers, and transformers for special purposes according to their uses.
After a certain phase of the operation transformer of 500kV has a fault, the standby transformer needs to be replaced emergently, and the voltage ratio is completely the same and the impedance difference between high, medium, high and low short circuits is not more than 2% according to the requirements of the standby transformer and other two non-fault phases of the fault transformer.
At present, the production cost of 500kV transformers is too high, but the economical efficiency is poor because all running 500kV transformers need to be provided with a standby transformer with proper parameters; meanwhile, the production period of the 500kV transformer is long, so that the timeliness of temporarily producing a spare part after a fault occurs is poor, and the transformer also faces the risk of long-time shutdown; for this reason, a flexible backup transformer needs to be designed.
SUMMERY OF THE UTILITY MODEL
Aiming at the situation, in order to solve the problem that the existing 500kV transformer has overhigh production cost, but needs to configure a standby transformer with proper parameters for all running 500kV transformers, the economical efficiency is poor; simultaneously, 500kV transformer's production cycle is than longer, and this makes after breaking down produce a spare parts timeliness poor temporarily, and the transformer also faces the problem of longer time outage risk, the utility model provides a flexible spare transformer, effectual realized can be for single-phase auto transformer set production flexible spare parts under the specific capacity to emergent when satisfying certain transformer trouble is put into operation, can also provide the emergent spare parts of transformer for certain province or certain region under the circumstances that satisfies certain economic nature, reduces the off-time of transformer, has ensured the safety and stability operation of transformer, and this transformer simple structure and practicality are stronger.
In order to achieve the above object, the utility model provides a following technical scheme: a flexible standby transformer comprises a series winding, a common winding, a voltage regulating winding and a low-voltage winding, wherein the low-voltage winding is located in the middle of an iron core and the voltage regulating winding, the common winding is located in the middle of the series winding and the voltage regulating winding, the tail end of the series winding is connected with a first off-circuit tap-changer, the voltage regulating winding is connected with a second off-circuit tap-changer, a high-medium series adjustable reactor is connected between the series winding and the voltage regulating winding in series, the high-medium series adjustable reactor is adjusted by adopting an on-load tap-changer, and the head end of the low-voltage winding is connected with a low-voltage series reactor with a tap in series;
the first off-circuit tap changer is used for adjusting voltage on a high-voltage side, the second off-circuit tap changer is used for adjusting the transformer transformation ratio of the transformer, the high-medium series adjustable reactor is used for adjusting high-medium short-circuit impedance, and the low-voltage series reactor is used for adjusting medium-low short-circuit impedance.
Preferably, a plurality of taps are led out from the tail end of the series winding, and the tapping position is adjusted by the first off-circuit tapping switch to realize high-voltage regulation.
Preferably, the head end of the common winding is connected with the voltage regulating winding, and the tapping position is regulated by the second off-circuit tap changer to realize medium voltage regulation.
Preferably, the high and medium series adjustable reactor adjusts the tapping position through an on-load tap-changer and realizes high and medium impedance adjustment.
Preferably, the low-voltage series reactor is provided with a plurality of taps, and the taps can be used for low-voltage winding outgoing lines.
Preferably, the high and medium series adjustable reactor and the low-voltage series reactor are both independently arranged in the transformer oil tank.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) Firstly, the voltage of a high-voltage side is adjustable by leading out a tap at the tail end of a series winding in a voltage adjusting mode of a first off-circuit tap changer, so that the transformer can be completely matched with a transformer in operation under the condition of multiple voltage ratios, and the requirement that the voltage ratio of a spare product is completely the same as that of the transformer in operation is met.
(2) High-medium short circuit impedance can be adjusted by connecting high-medium series adjustable reactors between the series winding and the voltage regulating winding in series, and the transformer can realize high-medium impedance matching with various high-medium short circuit impedances in the operation transformer, so that the mutual difference between the high-medium short circuit impedance of a spare product and the high-medium short circuit impedance of the operation transformer is not more than 2 percent;
(3) The adjustable low-voltage short-circuit impedance is realized by connecting a low-voltage series reactor in series at the head end of the low-voltage winding and selecting a matching tap as a low-voltage winding outlet wire, and the spare part is enabled to be matched with the low-voltage short-circuit impedance in the transformer in the nearest way under the actual production condition;
(4) The utility model discloses the effectual single-phase auto transformer set that has realized this transformer can be under specific capacity produces a flexible spare parts to meet the urgent need of when certain transformer trouble and put into operation, can also be satisfying under the condition of certain economic nature for a certain province or a certain region provides the emergent spare parts of transformer, reduce the off-stream time of transformer, the effectual safe and stable operation that ensures the transformer.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic layout diagram of the iron core, the winding and the reactor of the present invention;
fig. 2 is a schematic diagram of the embodiment of the present invention;
fig. 3 is a schematic layout of the bushing and the tapping switch of the present invention;
in the figure: 1. a series winding; 2. a common winding; 3. a voltage regulating winding; 4. a low voltage winding; 5. an iron core; 6. the high-middle series adjustable reactor; 7. and a low-voltage series reactor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Given by figures 1-3, the utility model relates to a flexible standby transformer, including series winding 1, common winding 2, regulating winding 3 and low voltage winding 4, low voltage winding 4 is located iron core 5 and regulating winding 3 intermediate position, just common winding 2 is located series winding 1 and regulating winding 3 intermediate position, the end of series winding 1 is connected with first off-circuit tap-changer, just regulating winding 3 is connected with second off-circuit tap-changer, it connects high school series connection adjustable reactor 6 to have concatenated between series winding 1 and regulating winding 3, wherein high school series connection adjustable reactor 6 adopts on-load tap-changer to adjust, low voltage winding 4 head end concatenates and takes a percentage low voltage series reactor 7; first off-circuit tap-changer is used for adjusting high-voltage side voltage, just second off-circuit tap-changer is used for adjusting transformer transformation ratio, high well series connection adjustable reactor 6 is used for adjusting high well short-circuit impedance, low pressure series reactor 7 is arranged in adjusting well short-circuit impedance, has realized producing a flexible spare parts for single-phase auto transformer set under the specific capacity through series winding 1 that is provided with, common winding 2, voltage regulating winding 3, low pressure winding 4, high well series connection adjustable reactor 6 and low pressure series reactor 7 to satisfy under the condition of certain economic nature for certain province or certain region provides the emergent spare parts of transformer, reduce the outage time of transformer, ensured the safe and stable operation of transformer.
Specifically, a plurality of taps are led out from the tail end of the series winding 1, the tap positions are adjusted by the first off-circuit tap switch to achieve high-voltage regulation, and the taps led out from the tail end of the series winding 1 are adjusted by the first off-circuit tap switch to achieve high-voltage side voltage regulation, so that the transformer is completely matched with a transformer in operation under the condition of multiple voltage ratios, and the voltage ratios of a spare product and the transformer in operation are completely the same.
Specifically, the head end of the common winding 2 is connected with the voltage regulating winding 3, the tapping position is regulated by the second off-circuit tap switch to realize medium voltage regulation, and the transformer transformation ratio and the medium voltage regulation of the transformer can be regulated by the second off-circuit tap switch.
Specifically, the high-medium series adjustable reactor 6 adjusts the tapping position through an on-load tap changer and realizes high-medium impedance adjustment, high-medium short-circuit impedance adjustment can be realized through connecting the high-medium series adjustable reactor 6 between the series winding 1 and the voltage regulating winding 3 in series, high-medium short-circuit impedance matching of the transformer and various high-medium short-circuit impedances in the transformer can be realized, and the requirement that the difference between the high-medium short-circuit impedance of a spare product and the high-medium short-circuit impedance of the transformer is not more than 2% is met.
Specifically, the low-voltage series reactor 7 is provided with a plurality of taps, the taps can be used for outgoing lines of the low-voltage winding 4, the low-voltage short-circuit impedance can be adjusted by connecting the low-voltage series reactor 7 in series at the head end of the low-voltage winding 4 and selecting the matching taps as the outgoing lines of the low-voltage winding 4, and the spare product is enabled to be recently matched with the spare product under the actual low-short-circuit impedance mutual-difference production condition in the transformer.
Specifically, the high-medium series adjustable reactor 6 and the low-voltage series reactor 7 are both independently arranged inside the transformer oil tank, and the designed functions can be better played by arranging the arranged high-medium series adjustable reactor 6 and the arranged low-voltage series reactor 7 inside the transformer oil tank.
When the transformer is used, firstly, the voltage at the high-voltage side is adjustable by leading out a tap at the tail end of a series winding 1 and adopting a first non-excitation tap switch voltage adjusting mode, so that the transformer is completely matched with a transformer in operation under the condition of multiple voltage ratios, the voltage ratio of a spare product to the transformer in operation is completely the same, then, the impedance adjustment of high-medium short circuit can be realized by connecting a high-medium series adjustable reactor 6 between the series winding 1 and a voltage adjusting winding 3 in series, the impedance matching of the transformer with multiple high-medium short circuit impedances in the transformer in operation is realized, the mutual difference between the impedance of the spare product and the high-medium short circuit impedance of the transformer in operation is not more than 2%, then, the impedance adjustment of low-voltage short circuit is realized by connecting a low-voltage series reactor 7 in series at the head end of a low-voltage winding 4 and selecting a matching tap as an outgoing line of the low-voltage winding 4, and the spare product is matched with the nearest short-circuit impedance difference in the transformer in operation under the actual production condition of low-medium short circuit impedance.
The utility model discloses a part be general standard component or the part that technical staff in the field knows, its structure and principle all are that this technical staff all can learn through the technical manual or learn through conventional experimental method.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a flexible standby transformer, includes series winding (1), common winding (2), regulating winding (3) and low voltage winding (4), its characterized in that: the transformer is characterized in that the low-voltage winding (4) is located in the middle of the iron core (5) and the voltage regulating winding (3), the public winding (2) is located in the middle of the series winding (1) and the voltage regulating winding (3), the tail end of the series winding (1) is connected with a first off-circuit tap-changer, the voltage regulating winding (3) is connected with a second off-circuit tap-changer, a high-voltage and medium-voltage series adjustable reactor (6) is connected between the series winding (1) and the voltage regulating winding (3) in series, the high-voltage and medium-voltage series adjustable reactor (6) is adjusted by adopting an on-load tap-changer, and the head end of the low-voltage winding (4) is connected with a low-voltage series reactor (7) with a tap in series;
the first off-circuit tap changer is used for adjusting voltage on a high-voltage side, the second off-circuit tap changer is used for adjusting the transformer transformation ratio, the high-medium series adjustable reactor (6) is used for adjusting high-medium short-circuit impedance, and the low-voltage series reactor (7) is used for adjusting medium-low short-circuit impedance.
2. A flexible backup transformer according to claim 1, characterized in that: and a plurality of taps are led out from the tail end of the series winding (1), and the tapping position is adjusted by the first off-circuit tapping switch to realize high-voltage regulation.
3. A flexible backup transformer according to claim 1, characterized in that: the head end of the common winding (2) is connected with the voltage regulating winding (3), and the tapping position is regulated by the second off-circuit tap switch to realize medium voltage regulation.
4. A flexible backup transformer according to claim 1, characterized in that: and the high-and-medium-sized series adjustable reactor (6) adjusts the tapping position through an on-load tap-changer and realizes high-and-medium-sized impedance adjustment.
5. A flexible backup transformer according to claim 1, characterized in that: the low-voltage series reactor (7) is provided with a plurality of taps, and the taps can be used for outgoing lines of the low-voltage winding (4).
6. A flexible backup transformer according to claim 1, characterized in that: and the high-middle series adjustable reactor (6) and the low-voltage series reactor (7) are both independently arranged in the transformer oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222169640.8U CN218414239U (en) | 2022-08-18 | 2022-08-18 | Flexible spare transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222169640.8U CN218414239U (en) | 2022-08-18 | 2022-08-18 | Flexible spare transformer |
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| CN218414239U true CN218414239U (en) | 2023-01-31 |
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| CN202222169640.8U Active CN218414239U (en) | 2022-08-18 | 2022-08-18 | Flexible spare transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116581753A (en) * | 2023-05-29 | 2023-08-11 | 国网江苏省电力有限公司电力科学研究院 | Transformer spare part configuration strategy optimization method, device, medium and equipment |
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2022
- 2022-08-18 CN CN202222169640.8U patent/CN218414239U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116581753A (en) * | 2023-05-29 | 2023-08-11 | 国网江苏省电力有限公司电力科学研究院 | Transformer spare part configuration strategy optimization method, device, medium and equipment |
| CN116581753B (en) * | 2023-05-29 | 2024-01-02 | 国网江苏省电力有限公司电力科学研究院 | Transformer spare part configuration strategy optimization method, device, medium and equipment |
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