CN104465041A - Oil-immersed transformer - Google Patents
Oil-immersed transformer Download PDFInfo
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- CN104465041A CN104465041A CN201310453128.9A CN201310453128A CN104465041A CN 104465041 A CN104465041 A CN 104465041A CN 201310453128 A CN201310453128 A CN 201310453128A CN 104465041 A CN104465041 A CN 104465041A
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- transformer
- oil
- coil
- backup fuse
- sleeve pipe
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Abstract
The invention discloses an oil-immersed transformer. The oil-immersed transformer comprises an oil tank used for containing transformer oil, a backup fuse and a transformer coil arranged in the oil tank, wherein the backup fuse is arranged inside the oil tank and comprises a first terminal and a second terminal; the first terminal is connected with an outer connection wire; the transformer coil is connected with the second terminal. By means of the oil-immersed transformer, the effect of improving the working stability of the transformer is achieved.
Description
Technical field
The present invention relates to field transformer, in particular to a kind of oil-filled transformer.
Background technology
At present, overhead transmission line distribution adopts oil-filled transformer mostly, and adopts bench type to install.Existing transformer, when safe operation, needs to seal in fuse switch in outside high-pressure side, utilizes the characteristic that the fuse of fuse switch inside fuses when overcurrent, realize the protection to transformer.Existing transformer needs to seal in fuse switch in outside high-pressure side, and therefore needing increases lead-in wire in the high-pressure side of transformer, and transformer is connected with fuse switch, thus reaches the effect that fuse switch protects the carrying out of transformer.Because needs increase lead-in wire, make the electric wire around transformer crisscross, fail safe is lower, easily causes ground connection and electric shock accidents.
In addition, in transformer running, fuse switch is easily subject to the impact of external environmental factor, transformer job stability is low, such as due to the faulty operation of staff, high-voltage explosion fuse Internal fuse is fused, causes transformer fault power failure etc.
For the problem that transformer job stability in prior art is low, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of oil-filled transformer, to solve the low problem of transformer job stability.
To achieve these goals, according to an aspect of the present invention, a kind of oil-filled transformer is provided.Oil-filled transformer according to the present invention comprises: fuel tank, for taking up transformer oil; Backup fuse, is arranged in fuel tank, and comprise the first terminals and the second terminals, the first terminals are connected with external connection; Magnetic maintained switch, is arranged in fuel tank, and described magnetic maintained switch is connected between described second terminals and described transformer coil; And transformer coil, be arranged in fuel tank, transformer coil is connected with the second terminals.
Further, oil-filled transformer also comprises: magnetic maintained switch, and magnetic maintained switch is connected between the second terminals and transformer coil.
Further, magnetic maintained switch is magnetic latching relay, and magnetic latching relay comprises relay switch, and relay switch is connected between the second terminals and transformer coil.
Further, oil-filled transformer also comprises sleeve pipe, and sleeve pipe is arranged on fuel tank, and the first terminals are connected with external connection by sleeve pipe.
Further, sleeve pipe is the bushing adopting flexible cable.
Further, transformer coil comprises primary winding and secondary coil, and primary winding is high-pressure side coil, and secondary coil is low-voltage side coil, and primary winding is connected with the second terminals.
Further, backup fuse comprises the first backup fuse, the second backup fuse and the 3rd backup fuse; Transformer coil comprises the first transformer coil, the second transformer coil and the 3rd transformer coil, wherein, first transformer coil is connected with the first backup fuse, and the second transformer coil is connected with the second backup fuse, and the 3rd transformer coil is connected with the 3rd backup fuse.
Further, magnetic maintained switch comprises: the first incoming end, the second incoming end and the 3rd incoming end, first incoming end is connected with the first backup fuse, and the second incoming end is connected with the second backup fuse, and the 3rd incoming end is connected with the 3rd backup fuse; And first output, the second output and the 3rd output, the first output is connected with the first transformer coil, and the second output is connected with the second transformer coil, and the 3rd output connects and is connected with the 3rd transformer coil.
Further, shown sleeve pipe comprises the first sleeve pipe, the second sleeve pipe and the 3rd sleeve pipe, and the first sleeve pipe is connected with the first backup fuse, and the second sleeve pipe is connected with the second backup fuse, and the 3rd sleeve pipe is connected with the 3rd backup fuse.
Further, oil-filled transformer is that three-phase is by immersion transformer.
By the present invention, oil-filled transformer is adopted to comprise: fuel tank, for taking up transformer oil; Backup fuse, is arranged in fuel tank, and comprise the first terminals and the second terminals, the first terminals are connected with external connection; Magnetic maintained switch, is arranged in fuel tank, and described magnetic maintained switch is connected between described backup fuse second terminals and described transformer coil; And transformer coil; be arranged in fuel tank; transformer coil is connected with magnetic maintained switch terminals; transformer coil is connected with magnetic maintained switch terminals; backup fuse, magnetic maintained switch are all arranged in the fuel tank of oil-filled transformer; and be connected between external connection and transformer coil, for transshipping to oil-filled transformer and short-circuit protection (backup fuse provides transformer short-circuit protection, magnetic maintained switch provides transformer overload to protect).Due to backup fuse, magnetic maintained switch are all arranged on oil-filled transformer inside, make transformer connection simple, backup fuse is not subject to the impact of outside environmental elements, solves the problem that transformer job stability is low, and then reaches the effect of the stability improving transformer work.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of oil-filled transformer according to a first embodiment of the present invention; And
Fig. 2 is the schematic diagram of oil-filled transformer according to a second embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiments provide a kind of oil-filled transformer.Fig. 1 is the schematic diagram of oil-filled transformer according to a first embodiment of the present invention.As shown in Figure 1, this oil-filled transformer comprises fuel tank 5, backup fuse 2 and transformer coil 4.Fuel tank 5 is for taking up transformer oil.Each components and parts in oil-filled transformer are all immersed in the transformer oil in this fuel tank 5, and this transformer oil has insulating effect, make the circulation not having electric current between the components and parts such as the coil in transformer.
Backup fuse 2 is arranged in fuel tank 5, and this backup fuse 2 comprises the first terminals and the second terminals, and the first terminals are connected with external connection.Backup fuse 2 can adopt any type of fuse; in fuse inside, there is fuse; this fuse is when electric current exceedes certain threshold value; can automatically fuse; to cut off the electric current in circuit, follow the function that backup fuse 2 has short-circuit protection and overload protection, backup fuse 2 is arranged in the fuel tank 5 of transformer; and be connected between external connection and transformer coil 4, for playing short-circuit protection and overload protection to transformer.This backup fuse 2 can be connected on transformer high-voltage lateral coil, also can be connected on transformer low voltage lateral coil, also can be connected on high-pressure side coil and low-voltage side coil, to carry out duplicate protection to transformer.External connection can be high pressure external connection, also can be low pressure external connection.When external connection is high pressure external connection, backup fuse 2 adopts high-tension fuse, is connected between high pressure external connection and high-pressure side coil; When external connection is low pressure external connection, backup fuse 2 can adopt common fuse, is connected between low pressure external connection and low-voltage side coil.
Transformer coil 4 is arranged in fuel tank 5, and transformer coil 4 is connected with the second terminals of backup fuse.This transformer coil 4 is for carrying out transformation process to voltage.Such as, when this oil-filled transformer is 10kV oil-filled transformer, can be 400V voltage by 10kV photovoltaic conversion by transformer coil 4.
By the embodiment of the present invention, backup fuse 2 is arranged in the fuel tank 5 of oil-filled transformer, and is connected between external connection and transformer coil 4, for transshipping and short-circuit protection to oil-filled transformer.Due to backup fuse 2 is arranged on oil-filled transformer inside, make backup fuse 2 not be subject to the impact of outside environmental elements, for fuse switch of the prior art, good stability, improves the stability of the work of transformer.Oil-filled transformer device in the embodiment of the present invention can be single-phase type transformer, also can be three-phase type transformer.
Preferably, oil-filled transformer also comprises magnetic maintained switch 3.This magnetic maintained switch 3 is connected between the second terminals of backup fuse and transformer coil 4.Magnetic maintained switch 3 is connected between backup fuse 2 and transformer coil 4; can when oil-filled transformer be in that in long-term overload or fuel tank 5, temperature is too high; automatic end opens connection; connection between disconnecting transformer coil 4 and external connection; protection oil-filled transformer transships or the impact of high temperature for a long time, extends the useful life of oil-filled transformer.In addition, magnetic maintained switch 3 also has the function manually disconnecting and close, and facilitates staff to the service work of this oil-filled transformer.
Such as, in summer, outdoor temperature is high especially, oil-filled transformer meeting hot soak condition, and because oil-filled transformer is power supply unit, electric energy, in the process of conversion, can produce a large amount of heats, make the temperature in oil-filled transformer become higher.Oil-filled transformer is in this kind of condition of high temperature for a long time, and its useful life can reduce greatly.Adopt magnetic maintained switch 3, when oil-filled transformer internal temperature reaches certain value, magnetic maintained switch disconnects automatically, cuts off oil fuse internal current, quits work.
Further preferably, magnetic maintained switch 3 is magnetic latching relay, and magnetic latching relay comprises relay switch, and relay switch is connected between the second terminals and transformer coil 4.Magnetic latching relay plays the effect automatically cut off to inside transformer circuit, the state of the relay switch of magnetic latching relay triggers by temperature signal.This temperature is obtained by current conversion.When oil-filled transformer current overload causes the temperature of inside transformer to reach setting, the relay switch in magnetic latching relay disconnects automatically, cuts off oil-filled transformer internal current, plays the effect to transformer overload protection.
Such as, oil-filled transformer has certain rated current, when the electric current of inside transformer exceedes this rated current, easily damages oil-filled transformer.Adopt magnetic latching relay, when voltage device internal current exceedes this rated current, magnetic latching relay control relay switch disconnects, and cuts off oil-filled transformer internal current, quits work, and protection oil-filled transformer is without prejudice.
Preferably, oil-filled transformer also comprises sleeve pipe 1, and this sleeve pipe 1 is arranged on fuel tank 5, and the first terminals of backup fuse 2 are connected with external connection by sleeve pipe 1.The effect that this sleeve pipe 1 has insulation and supports.Sleeve pipe 1 can be a sleeve pipe, and also can be multiple sleeve pipe, the number of sleeve pipe be determined according to the number of external connection.When oil-filled transformer is three-phase transformer, oil-filled transformer comprises 3 sleeve pipes.Sleeve pipe 1 is contained in the high-pressure side of oil-filled transformer, for high pressure external connection will be accessed, because the voltage of high pressure external connection is very high, the voltage of oil tank of transformer is very low, high-tension high pressure external connection can be linked into the coil in the different oil-filled transformer of current potential by employing sleeve pipe 1, the effect played insulation and support.
Further preferably, sleeve pipe 1 is the bushing adopting flexible cable.Adopt the bushing of flexible cable to make sleeve pipe 1 have all insulation characteristic, because flexible cable has pliability, to the interface of external connection and oil-filled transformer, there is certain protective effect.
The transformer coil 4 of the oil-filled transformer in the embodiment of the present invention comprises primary winding and secondary coil, and primary winding is high-pressure side coil, and secondary coil is low-voltage side coil, and primary winding is connected with the second terminals.Backup fuse 2 in the present embodiment adopts high-tension fuse, is connected with the primary winding of oil-filled transformer, that is to say to be connected with high-pressure side coil, for the protection of the high-pressure side of oil-filled transformer.
Fig. 2 is the schematic diagram of oil-filled transformer according to a second embodiment of the present invention.The oil-filled transformer of this embodiment can as a kind of preferred implementation of the oil-filled transformer shown in Fig. 1.
As shown in Figure 2, the oil-filled transformer of the embodiment of the present invention is three-phase type transformer.Backup fuse 2 comprises the first backup fuse 201, second backup fuse 202 and the second backup fuse 203.Wherein the first backup fuse 201, second backup fuse 202 and the second backup fuse 203 can be identical fuses, also can be not identical fuses.Transformer coil comprises the first transformer coil, the second transformer coil and the 3rd transformer coil, wherein, first transformer coil is connected with the first backup fuse 201, second transformer coil is connected with the second backup fuse 202, and the 3rd transformer coil is connected with the second backup fuse 203.First backup fuse 201, second backup fuse 202 and the second backup fuse 203 and the first transformer coil, the second transformer coil and the 3rd transformer coil are all at fuel tank internal.
Be connected to by three backup fuses on three transformer coils, wherein, the first backup fuse 201 and the first transformer coil, for the protection of the first transformer coil of transformer; Second backup fuse 202 is connected with the second transformer coil, for the protection of the second transformer coil of transformer; Second backup fuse 203 is connected with the 3rd transformer coil, for the protection of the 3rd transformer coil of transformer.First backup fuse 201, second backup fuse 202 and the second backup fuse 203 can adopt any type of fuse; fuse inside has fuse; this fuse is when electric current exceedes certain threshold value; can automatically fuse; to cut off the electric current in circuit; therefore backup fuse 2 has the function of short-circuit protection, for playing short-circuit protection to transformer.This backup fuse 2 can be connected on transformer high-voltage lateral coil, also can be connected on transformer low voltage lateral coil, also can be connected on high-pressure side coil and low-voltage side coil, to carry out duplicate protection to transformer.
Such as; when in inside transformer first transformer coil, the second transformer coil and the 3rd transformer coil there is short circuit in any one coil or several coil; fuse failure in corresponding backup protection fuse; to make inside transformer circuit disconnect, thus protection transformer is from the destruction of short circuit current.
Oil-filled transformer in the embodiment of the present invention can adopt a magnetic maintained switch to control the first transformer coil, the second transformer coil and the 3rd transformer coil, and three magnetic maintained switchs also can be adopted to control the first transformer coil, the second transformer coil and the 3rd transformer coil respectively.
Preferably, oil-filled transformer magnetic maintained switch 3 comprises: the first incoming end 31, second incoming end 32 and the 3rd incoming end 22, first incoming end 31 is connected with the first backup fuse 201, second incoming end 32 is connected with the second backup fuse 202, and the 3rd incoming end 33 is connected with the second backup fuse 203; And first output 34, second output 35 and the 3rd output 36, first output 34 be connected with the first transformer coil, the second output 35 is connected with the second transformer coil, and the 3rd output 36 connects and is connected with the 3rd transformer coil.Adopt this magnetic maintained switch 3 to control the first transformer coil, the second transformer coil and the 3rd transformer coil, the volume of oil-filled transformer can be reduced.This magnetic maintained switch 3 also can be regarded as that three magnetic maintained switchs are combined.
As shown in Figure 2, the oil-filled transformer of the embodiment of the present invention comprises the first sleeve pipe 101, second sleeve pipe 102 and the 3rd sleeve pipe 103, first sleeve pipe 101 is connected with the first backup fuse 201, second sleeve pipe 102 is connected with the second backup fuse 201, and the 3rd sleeve pipe 103 is connected with the 3rd backup fuse 203.First sleeve pipe 101, second sleeve pipe 102 and the 3rd sleeve pipe 103 are all arranged on the fuel tank of oil-filled transformer.
First sleeve pipe 101, second sleeve pipe 102 and the 3rd sleeve pipe 103 are respectively used to the first transformer coil in oil-filled transformer, the second transformer coil to be connected with external connection with the 3rd transformer coil, can play the effect of insulation to the connection jaws of oil-filled transformer and support.
By the embodiment of the present invention, backup fuse is placed in the inside of oil-filled transformer, without the need to external fuse switch, decreases the layout of the electric wire outside oil-filled transformer.Because oil-filled transformer itself has had short circuit overload protection function; therefore the oil-filled transformer of the embodiment of the present invention can be used as pole type transformer; can box-type transformer be used as, can as indoor transformers such as switchgear houses, can also as phase shifting transformer
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. an oil-filled transformer, is characterized in that, comprising:
Fuel tank, for taking up transformer oil;
Backup fuse, is arranged in described fuel tank, comprises the first terminals and the second terminals, and described first terminals are connected with external connection; And
Transformer coil, be arranged in described fuel tank, described transformer coil is connected with described second terminals, described transformer coil comprises primary winding and secondary coil, described primary winding is high-pressure side coil, described secondary coil is low-voltage side coil, and described primary winding is connected with described second terminals.
2. oil-filled transformer according to claim 1, is characterized in that, described oil-filled transformer also comprises:
Magnetic maintained switch, described magnetic maintained switch is connected between described second terminals and described transformer coil.
3. oil-filled transformer according to claim 2, it is characterized in that, described magnetic maintained switch is magnetic latching relay, and described magnetic latching relay comprises relay switch, and described relay switch is connected between described second terminals and described transformer coil.
4. oil-filled transformer according to claim 2, is characterized in that, described oil-filled transformer also comprises sleeve pipe, and described sleeve pipe is arranged on described fuel tank, and described first terminals are connected with described external connection by described sleeve pipe.
5. oil-filled transformer according to claim 4, is characterized in that, described sleeve pipe is the bushing adopting flexible cable.
6. oil-filled transformer according to claim 4, is characterized in that,
Described backup fuse comprises the first backup fuse, the second backup fuse and the 3rd backup fuse;
Described transformer coil comprises the first transformer coil, the second transformer coil and the 3rd transformer coil,
Wherein, described first transformer coil is connected with described first backup fuse, and described second transformer coil is connected with described second backup fuse, and described 3rd transformer coil is connected with described 3rd backup fuse.
7. oil-filled transformer according to claim 6, is characterized in that, described magnetic maintained switch comprises:
First incoming end, the second incoming end and the 3rd incoming end, described first incoming end is connected with described first backup fuse, and described second incoming end is connected with described second backup fuse, and described 3rd incoming end is connected with described 3rd backup fuse; And
First output, the second output and the 3rd output, described first output is connected with described first transformer coil, described second output is connected with described second transformer coil, and described 3rd output connects and is connected with described 3rd transformer coil.
8. oil-filled transformer according to claim 6, it is characterized in that, shown sleeve pipe comprises the first sleeve pipe, the second sleeve pipe and the 3rd sleeve pipe, described first sleeve pipe is connected with described first backup fuse, described second sleeve pipe is connected with described second backup fuse, and described 3rd sleeve pipe is connected with described 3rd backup fuse.
9. oil-filled transformer according to claim 1, is characterized in that, described oil-filled transformer is threephase oil immersed transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453128.9A CN104465041A (en) | 2013-09-25 | 2013-09-25 | Oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453128.9A CN104465041A (en) | 2013-09-25 | 2013-09-25 | Oil-immersed transformer |
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| Publication Number | Publication Date |
|---|---|
| CN104465041A true CN104465041A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310453128.9A Pending CN104465041A (en) | 2013-09-25 | 2013-09-25 | Oil-immersed transformer |
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| CN (1) | CN104465041A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206400A (en) * | 2015-10-20 | 2015-12-30 | 国网北京市电力公司电力科学研究院 | On-pillar distribution transformer with internal protection function |
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158892A (en) * | 1966-03-30 | 1969-07-23 | Yorkshire Electricity Board | Improvements relating to Transformer Assemblies for Current Distribution |
| CN2110273U (en) * | 1991-12-20 | 1992-07-15 | 河南石油勘探局水电厂 | Power transformer with distributor protection function |
| CN2383252Y (en) * | 1999-06-03 | 2000-06-14 | 山东现代达驰集团公司 | Dense energy saving regulating volume transforming station |
| CN201285693Y (en) * | 2008-11-01 | 2009-08-05 | 广东中电华强变压器有限公司 | Combined transformer |
| CN201348915Y (en) * | 2009-02-18 | 2009-11-18 | 杭州钱江电气集团股份有限公司 | Completely self-protecting mono-phase pole-type transformer |
| CN201877270U (en) * | 2010-08-10 | 2011-06-22 | 杭州钱江电气集团股份有限公司 | Completely self-protected amorphous distribution transformer |
-
2013
- 2013-09-25 CN CN201310453128.9A patent/CN104465041A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1158892A (en) * | 1966-03-30 | 1969-07-23 | Yorkshire Electricity Board | Improvements relating to Transformer Assemblies for Current Distribution |
| CN2110273U (en) * | 1991-12-20 | 1992-07-15 | 河南石油勘探局水电厂 | Power transformer with distributor protection function |
| CN2383252Y (en) * | 1999-06-03 | 2000-06-14 | 山东现代达驰集团公司 | Dense energy saving regulating volume transforming station |
| CN201285693Y (en) * | 2008-11-01 | 2009-08-05 | 广东中电华强变压器有限公司 | Combined transformer |
| CN201348915Y (en) * | 2009-02-18 | 2009-11-18 | 杭州钱江电气集团股份有限公司 | Completely self-protecting mono-phase pole-type transformer |
| CN201877270U (en) * | 2010-08-10 | 2011-06-22 | 杭州钱江电气集团股份有限公司 | Completely self-protected amorphous distribution transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206400A (en) * | 2015-10-20 | 2015-12-30 | 国网北京市电力公司电力科学研究院 | On-pillar distribution transformer with internal protection function |
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
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Application publication date: 20150325 |