CN202422974U - On-load voltage regulation transformer - Google Patents
On-load voltage regulation transformer Download PDFInfo
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- CN202422974U CN202422974U CN201120566963XU CN201120566963U CN202422974U CN 202422974 U CN202422974 U CN 202422974U CN 201120566963X U CN201120566963X U CN 201120566963XU CN 201120566963 U CN201120566963 U CN 201120566963U CN 202422974 U CN202422974 U CN 202422974U
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- shunting switch
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Abstract
The utility model provides an on-load voltage regulation transformer, which comprises an oil tank filled with transformer oil, a transformer main body and a V-shaped tap switch, wherein the transformer main body comprises three-phase high-voltage windings and three-phase low-voltage windings, the high-voltage winding of each phase comprises a basic section winding and a voltage regulation section winding, the winding directions of the basic section winding and the voltage regulation section winding are the same, the voltage regulation section winding is provided with multiple taps, and the negative polarity ends of the voltage regulation section windings are connected; the V-shaped tap switch comprises an integrated three-phase sub-tap switch, the sub-tap switch of each phase respectively corresponds to the high-voltage winding of each phase, the sub-tap switch comprises a connecting contact head and multiple voltage regulation contact heads, the connecting contact head of the sub-tap switch is connected with the negative polarity end of the corresponding basic section winding, and each voltage regulation contact head of the sub-tap switch is respectively connected with each tap of the corresponding voltage regulation section winding. According to the on-load voltage regulation transformer provided by the utility model, the axial filling efficiency of high-voltage windings and the low-voltage windings is effectively, and the performances of the transformer are improved.
Description
Technical field
The utility model relates to transformer technology, relates in particular to a kind of on-load tap-changing transformer.
Background technology
Everywhere voltage and incomplete same in the electric power system electrical network; Where can both output rated voltage in order to make no matter transformer is installed in electrical network; Just the high pressure winding at transformer is provided with repeatedly tap, and tap is received on the shunting switch, links to each other with electrical network through shunting switch.Like this, can connect with different Transformer Winding taps, change the turn ratio of transformer high-low pressure winding, thereby reach the purpose of regulating the transformer output voltage through shunting switch.Shunting switch comprises two kinds on No-load changer type and on-load voltage regulation type, and on-load voltage regulation type shunting switch can be regulated the position of tap in the transformer operating condition.
Profile according to shunting switch can be divided into V-type and M type etc. with on load tap changer; When passing through the V-type shunting switch to the transformer pressure regulation in the prior art; When the pressure regulation side three-phase mode of connection of transformer is that Y is when connecing; What the sub-shunting switch mode of connection of the three-phase of V-type shunting switch adopted also is that Y connects, identical with three phase connections of pressure regulation side.The transformer of the type is referred to as Y and connects V-type switch on-load tap-changing transformer.Fig. 1 connects V-type switch on-load tap-changing transformer structural representation for Y of the prior art.As shown in Figure 1; The reversed polarity afterbody linear voltage regulation mode that the voltage regulating mode of the coil of this transformer need adopt; Promptly the pressure regulation lateral coil of this transformer is divided into pressure regulation section coil 2 and basic segment coil 1, and pressure regulation section coil 2 and basic segment coil 1 be around on the contrary, reduces to keep away the performance that brow leakage causes; The negative polarity end of basic segment coil 1 links to each other with the positive ends of pressure regulation section coil 2, and the neutral point of pressure regulation side is drawn through the contact of sub-shunting switch 3.But; Again since pressure regulation section coil 2 and basic segment coil 1 around on the contrary; Pressure regulation section coil 2 is very big with the potential difference of basic segment coil 1 adjacent both ends; This just makes that the insulation oil duct is big between pressure regulation section coil 2 and the basic segment coil 1, thereby causes the axial charging efficiency of high-voltage coil and low-voltage coil poor, and laterally eddy current loss and the axial electric power of short circuit are all big.
The utility model content
The utility model provides a kind of on-load tap-changing transformer; The axial charging efficiency of the high-voltage coil and low-voltage coil that causes greatly with the insulation oil duct of avoiding owing to the pressure regulation section of transformer coil and basic segment is poor, laterally eddy current loss and the big problem of the axial electric power of short circuit, improves the performance of transformer.
The utility model provides a kind of on-load tap-changing transformer, comprises the fuel tank that is full of transformer oil, also comprises transformer body and V-type shunting switch;
Said transformer body comprises three-phase high-voltage winding and three-phase low pressure winding; Each mutually said high pressure winding comprises basic segment coil and pressure regulation section coil; Said basic segment coil and said pressure regulation section coil around to identical; Said pressure regulation section coil has a plurality of taps, and the negative polarity end of each said pressure regulation section coil links to each other;
Said V-type shunting switch comprises the sub-shunting switch of the three-phase that is wholely set; Each mutually said sub-shunting switch respectively with the corresponding setting of each mutually said high pressure winding; Said sub-shunting switch comprises a connection contact and a plurality of pressure regulation contact; The negative polarity end of the basic segment coil of the said high pressure winding that the said connection contact of said sub-shunting switch is corresponding with said sub-shunting switch links to each other, and each said tap of the pressure regulation section coil of the said high pressure winding that the said pressure regulation contact of each of said sub-shunting switch is corresponding with said sub-shunting switch respectively is corresponding one by one to link to each other;
Said transformer body and said V-type shunting switch are arranged in the said fuel tank.
Aforesaid on-load tap-changing transformer, wherein, the capacity of said transformer body is 4000 kilovolt-amperes-25000 kilovolt-amperes.
Aforesaid on-load tap-changing transformer, wherein, the range of regulation of said V-type shunting switch is ± 3 * 2.5%-± 4 * 2.5%.
Aforesaid on-load tap-changing transformer, wherein, the distance between said basic segment coil and the said pressure regulation section coil is 6 millimeters-8 millimeters.
Aforesaid on-load tap-changing transformer, wherein,
The quantity of the tap of said pressure regulation section coil is seven;
The quantity of the pressure regulation contact of said sub-shunting switch is seven.
Can know by technique scheme; The on-load tap-changing transformer that the utility model provides; The mode of connection of pressure regulation side three-phase is that Y connects; The mode of connection of V-type shunting switch is that D connects, the basic segment coil of each phase high pressure winding and pressure regulation section coil around to identical, the height of the oil duct that can reduce to insulate; Avoided the axial charging efficiency of the high-voltage coil and low-voltage coil that the insulation oil duct owing to the pressure regulation section of transformer coil and basic segment causes greatly poor, laterally eddy current loss and the big problem of the axial electric power of short circuit, improve the performance of transformer.The neutral point of pressure regulation side is not directly drawn through this V-type shunting switch, but draws through the coil afterbody, can effectively improve lightning impulse resistant, and then has improved the stability of transformer greatly.And; With respect to the coil of traditional reversed polarity afterbody linear voltage regulation during fabrication; When coil around when half left and right sides, could continue around complete coil after need turning winding former again, and the basic segment coil of the on-load tap-changing transformer high pressure winding that present embodiment provides and pressure regulation section coil are same polarity; During fabrication, not needing to turn again winding former just can be around complete coil.So not only simplify the coiling operation of coil, and shortened the coiling time, improved coiling efficient greatly.
Description of drawings
Fig. 1 connects V-type switch on-load tap-changing transformer structural representation for Y of the prior art;
The voltage adjustment of on-load transformer device structure sketch map that Fig. 2 provides for the utility model embodiment.
Embodiment
The voltage adjustment of on-load transformer device structure sketch map that Fig. 2 provides for the utility model embodiment.As shown in Figure 2, the voltage adjustment of on-load transformer that present embodiment provides specifically comprises the fuel tank (not shown) that is full of transformer oil, also comprises transformer body and V-type shunting switch.Transformer body comprises three-phase high-voltage winding and three-phase low pressure winding (not shown), is respectively A, B, C three-phase.Each phase high pressure winding comprises basic segment coil 1 and pressure regulation section coil 2, basic segment coil 1 and pressure regulation section coil 2 around to identical, pressure regulation section coil 2 has a plurality of tap ZK, the negative polarity end of each pressure regulation section coil 2 is continuous.The V-type shunting switch comprises the sub-shunting switch 3 of the three-phase that is wholely set; Each phase shunting switch respectively with each corresponding setting of high pressure winding mutually; Sub-shunting switch 3 comprises a connection contact XK and a plurality of pressure regulation contact YK; The negative polarity end of the basic segment coil 1 of the high pressure winding that the connection contact of sub-shunting switch 3 and sub-shunting switch 3 are corresponding links to each other, and each pressure regulation contact YK of sub-shunting switch 3 each tap ZK of the pressure regulation section coil 2 of the high pressure winding corresponding with sub-shunting switch 3 respectively is corresponding one by one continuous.Transformer body and V-type shunting switch are arranged in the fuel tank.
Particularly; Be full of transformer oil in the fuel tank of on-load tap-changing transformer, transformer body and V-type shunting switch are separately positioned in the transformer oil in the fuel tank, and transformer oil is on the one hand as dielectric; Guaranteed the insulating properties of each device in the fuel tank; On the other hand, transformer oil can also can be realized the heat radiation to each device in the fuel tank through the circulation of transformer oil as heat eliminating medium.Transformer body comprises three-phase high-voltage winding and three-phase low pressure winding, and each phase high pressure winding comprises basic segment coil 1 and pressure regulation section coil 2.The high pressure winding is set to the pressure regulation side, because the high pressure winding is little with respect to the electric current in the low pressure winding, big electric current is to the damage of V-type shunting switch in the time of can being reduced in pressure regulation.
Basic segment coil 1 and pressure regulation section coil 2 around to identical, as be right around to or be a left side around to.The polarity at the polarity at basic segment coil 1 two ends and pressure regulation section coil 2 two ends all can be setting in advance, and for example, an end of basic segment coil 1 is set to positive pole, and then the other end is negative pole.Since basic segment coil 1 and pressure regulation section coil 2 around to identical; Basic segment coil 1 can directly be connected in series through sub-shunting switch 3 with pressure regulation section coil 2; The potential difference that produced for this sub-shunting switch 3 of the potential difference between basic segment coil 1 and the pressure regulation section coil 2 then, this current potential difference is very little.Therefore; What insulation oil duct height can be provided with between basic segment coil 1 and the pressure regulation section coil 2 is smaller; Be between basic segment coil 1 and the pressure regulation section coil 2 apart from S can be provided with smaller; Avoided in the prior art; Because the potential difference around to basic segment coil that causes on the contrary 1 and pressure regulation section coil 2 adjacent both ends of basic segment coil 1 and pressure regulation section coil 2 is the bigger potential difference that pressure regulation section coil 2 produces, so that the bigger problem of insulation oil duct aspect ratio between basic segment coil 1 and the pressure regulation section coil 2.Greatly reduce height and the height of fuel tank of barred window of the iron core of transformer body, improved the axial charging efficiency of high-voltage coil and low-voltage coil, improve the performance of transformer.And because the height of fuel tank diminishes, and volume is corresponding to diminish, the transformer oil of required filling also reduces, and has reduced the material cost of transformer.After the insulation oil duct height of pressure regulation section coil 2 and basic segment coil 1 reduces; The radial leakage field height of coil also decreases; The axial ampere turn unbalance factor and the axial electric power of short circuit of high-voltage coil and low-voltage coil have so not only been reduced; But also reduced the horizontal eddy current loss of coil, improved the anti-short circuit capability of transformer, and reduced load loss and all be beneficial to.
The sub-shunting switch 3 of three-phase in the V-type shunting switch is for what be wholely set, and every mutually sub-shunting switch 3 is provided with corresponding to high pressure winding corresponding with it, to realize the adjusting to each phase voltage.Sub-shunting switch 3 comprises a connection contact and a plurality of pressure regulation contact YK, and the quantity of tap ZK is identical on the quantity of pressure regulation contact YK and the pressure regulation section coil 2, and the quantity of pressure regulation contact YK and tap ZK can be come concrete the setting according to the pressure regulation needs of reality.The negative polarity end of the basic segment coil 1 of the high pressure winding that the connection contact of sub-shunting switch 3 and sub-shunting switch 3 are corresponding links to each other, and promptly the basic segment coil 1 of high pressure winding links to each other with pressure regulation section coil 2 through sub-shunting switch 3.Each pressure regulation contact YK of sub-shunting switch 3 is corresponding one by one the linking to each other of each tap ZK of the pressure regulation section coil 2 of the high pressure winding corresponding with sub-shunting switch 3 respectively.Only showing two tap ZK among Fig. 2 links to each other with corresponding pressure regulation contact YK.The negative polarity end of each pressure regulation section coil 2 links to each other.The mode of connection with the pressure regulation side three-phase of this on-load tap-changing transformer that forms is that Y connects, and connects and the mode of connection of sub-shunting switch 3 is D.Because pressure regulation section coil 2 is at the whole winding middle part; The neutral point of pressure regulation side is not directly to draw through this sub-shunting switch 3, when this on-load tap-changing transformer neutral point suffers lightning impulse, and the total head effect of the voltage that directly do not withstand shocks; At this moment as long as the lightning impulse voltage that acts on the sub-shunting switch 3 is maximum original half; Effectively protected the V-type shunting switch, improved the operational reliability of transformer, the lasting reliability that product is supplied power has played positive effect.
The on-load tap-changing transformer that present embodiment provides; The mode of connection of pressure regulation side three-phase is that Y connects; The mode of connection of V-type shunting switch is that D connects, the basic segment coil 1 of each phase high pressure winding and pressure regulation section coil 2 around to identical, the height of the oil duct that can reduce to insulate; Avoided the axial charging efficiency of the high-voltage coil and low-voltage coil that the insulation oil duct owing to the pressure regulation section of transformer coil and basic segment causes greatly poor, laterally eddy current loss and the big problem of the axial electric power of short circuit, improve the performance of transformer.The neutral point of pressure regulation side is not directly drawn through this V-type shunting switch, but draws through the coil afterbody, can effectively improve lightning impulse resistant, and then has improved the stability of transformer greatly.And; With respect to the coil of traditional reversed polarity afterbody linear voltage regulation during fabrication; When coil around when half left and right sides, could continue around complete coil after need turning winding former again, and the basic segment coil 1 of the on-load tap-changing transformer high pressure winding that present embodiment provides and pressure regulation section coil 2 are same polarity; During fabrication, not needing to turn again winding former just can be around complete coil.So not only simplify the coiling operation of coil, and shortened the coiling time, improved coiling efficient greatly.
In the present embodiment, preferably, the capacity of transformer body is 4000 kilovolt-amperes-25000 kilovolt-amperes.
In the present embodiment, particularly, the range of regulation of V-type shunting switch is ± 3 * 2.5%-± 4 * 2.5%.
In the present embodiment, preferably, between basic segment coil 1 and the pressure regulation section coil 2 is 6 millimeters-8 millimeters apart from S.Can on the basis that guarantees insulating properties, reduce the insulation oil duct height between basic segment coil 1 and the pressure regulation section coil 2.
In the present embodiment, particularly, the quantity of the tap ZK of pressure regulation section coil 2 is seven.Correspondingly, the quantity of the pressure regulation contact YK of sub-shunting switch 3 is seven.The quantity of pressure regulation contact YK and tap ZK can be come concrete the setting according to the pressure regulation needs of reality, does not exceed with present embodiment.
The on-load tap-changing transformer that the utility model provides adopts D to connect the V-type shunting switch, and the voltage regulating mode of coil is the middle part linear voltage regulation mode of same polarity.The axial charging efficiency of high-voltage coil and low-voltage coil is high, and the horizontal eddy current loss and the axial electric power of short circuit of coil are little, and on-load voltage regulating switch does not directly bear the total head effect of lightning impulse voltage, and the coiling time of coil is short, has good stable property.
What should explain at last is: above embodiment is only in order to the technical scheme of explanation the utility model, but not to its restriction; Although the utility model has been carried out detailed explanation with reference to previous embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the scope of each embodiment technical scheme of essence disengaging the utility model of relevant art scheme.
Claims (5)
1. an on-load tap-changing transformer comprises the fuel tank that is full of transformer oil, it is characterized in that: also comprise transformer body and V-type shunting switch;
Said transformer body comprises three-phase high-voltage winding and three-phase low pressure winding; Each mutually said high pressure winding comprises basic segment coil and pressure regulation section coil; Said basic segment coil and said pressure regulation section coil around to identical; Said pressure regulation section coil has a plurality of taps, and the negative polarity end of each said pressure regulation section coil links to each other;
Said V-type shunting switch comprises the sub-shunting switch of the three-phase that is wholely set; Each mutually said sub-shunting switch respectively with the corresponding setting of each mutually said high pressure winding; Said sub-shunting switch comprises a connection contact and a plurality of pressure regulation contact; The negative polarity end of the basic segment coil of the said high pressure winding that the said connection contact of said sub-shunting switch is corresponding with said sub-shunting switch links to each other, and each said tap of the pressure regulation section coil of the said high pressure winding that the said pressure regulation contact of each of said sub-shunting switch is corresponding with said sub-shunting switch respectively is corresponding one by one to link to each other;
Said transformer body and said V-type shunting switch are arranged in the said fuel tank.
2. on-load tap-changing transformer according to claim 1 is characterized in that: the capacity of said transformer body is 4000 kilovolt-amperes-25000 kilovolt-amperes.
3. on-load tap-changing transformer according to claim 1 is characterized in that: the range of regulation of said V-type shunting switch is ± 3 * 2.5%-± 4 * 2.5%.
4. on-load tap-changing transformer according to claim 1 is characterized in that: the distance between said basic segment coil and the said pressure regulation section coil is 6 millimeters-8 millimeters.
5. on-load tap-changing transformer according to claim 1 is characterized in that:
The quantity of the tap of said pressure regulation section coil is seven;
The quantity of the pressure regulation contact of said sub-shunting switch is seven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120566963XU CN202422974U (en) | 2011-12-30 | 2011-12-30 | On-load voltage regulation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120566963XU CN202422974U (en) | 2011-12-30 | 2011-12-30 | On-load voltage regulation transformer |
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| Publication Number | Publication Date |
|---|---|
| CN202422974U true CN202422974U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120566963XU Expired - Fee Related CN202422974U (en) | 2011-12-30 | 2011-12-30 | On-load voltage regulation transformer |
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| CN (1) | CN202422974U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160293325A1 (en) * | 2013-12-05 | 2016-10-06 | Maschinenfabrik Reinhausen Gmbh | Electrical switching system for a three-phase network |
| CN111326332A (en) * | 2019-12-17 | 2020-06-23 | 淄博职业学院 | Self-coupling voltage regulator capable of being used in partition mode |
-
2011
- 2011-12-30 CN CN201120566963XU patent/CN202422974U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160293325A1 (en) * | 2013-12-05 | 2016-10-06 | Maschinenfabrik Reinhausen Gmbh | Electrical switching system for a three-phase network |
| US10176919B2 (en) * | 2013-12-05 | 2019-01-08 | Maschinenfabrik Reinhausen Gmbh | Electrical switching system for a three-phase network |
| CN111326332A (en) * | 2019-12-17 | 2020-06-23 | 淄博职业学院 | Self-coupling voltage regulator capable of being used in partition mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20161230 |