CN212010670U - 35kV on-load voltage regulation isolation transformer - Google Patents
35kV on-load voltage regulation isolation transformer Download PDFInfo
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- CN212010670U CN212010670U CN202021045591.1U CN202021045591U CN212010670U CN 212010670 U CN212010670 U CN 212010670U CN 202021045591 U CN202021045591 U CN 202021045591U CN 212010670 U CN212010670 U CN 212010670U
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Abstract
The utility model discloses a 35kV on-load voltage regulation isolation transformer, including the oil tank, locate the transformer ware body in the oil tank to and locate the case lid at oil tank top, in order to reduce the interlaminar voltage, improve the distribution of the inside electric field of winding, former secondary winding adopts two sections multilayer drum formula structures, has the fill factor height, and impulse voltage distributes advantages such as good, has guaranteed the good electrical property of product; the 35kV on-load voltage regulation isolation transformer can regulate the tapping turns of a primary winding through an on-load tapping switch under the condition of load, so that on-load voltage regulation is realized, and the power supply quality requirement caused by the fluctuation of system voltage is met; meanwhile, the 35kV on-load voltage-regulating isolation transformer can realize voltage isolation of the original side and the secondary side, and has the characteristics of safe and reliable performance and convenience in maintenance.
Description
Technical Field
The utility model relates to a power voltage regulating transformer.
Background
In a railway power supply system, a power supply is connected from a transformer substation of a national power grid to a railway station and an interval load through a railway substation for supplying power. In order to ensure the power supply quality of the long-distance light-load interval through wire, particularly a railway line in a remote area (such as the Xinjiang Aleptai area), a 10kV or 35kV isolation voltage-regulating transformer is arranged in the through wire. The isolation voltage regulating transformer has the functions of: adjusting the voltage to meet the quality requirement of the power supply voltage; electromagnetic isolation is carried out between a railway through power supply line and a power supply system of a power supply department, and the influence of railway power system faults on the power supply system of the power supply department is reduced. The primary side and the secondary side of the 35kV isolation voltage regulating transformer are high in voltage, and in order to guarantee good electrical performance of the transformer, such as lightning impact performance and the like, higher performance requirements are provided for the transformer.
Disclosure of Invention
The utility model aims at providing a 35kV, capacity have good electrical property at 4000kVA and following on-load voltage regulation isolation transformer.
In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:
a35 kV on-load voltage regulation isolation transformer comprises an oil tank, a transformer body arranged in the oil tank, and a tank cover arranged at the top of the oil tank, wherein the oil tank adopts a finned radiator structure, the front side and the rear side of the top surface of the tank cover are provided with evenly distributed inlet and outlet wire 35kV porcelain sleeves, the right side of the top surface of the tank cover is provided with an oil conservator, and the left side of the top surface of the tank cover is provided with an on-load tap-changer;
the secondary winding is sleeved outside the iron core column, an angle ring I is arranged between the secondary winding and the iron core column and the iron yoke of the iron core, a stay chain I is arranged between the outside of the iron core column and the secondary winding, grooves are formed in the upper end and the lower end of the stay chain I, and the vertical part of the angle ring I is placed; an iron yoke cushion block is arranged between an upper iron yoke and a lower iron yoke of an iron core and the upper end and the lower end of a secondary winding, the iron yoke cushion block comprises an upper iron yoke cushion block and a lower iron yoke cushion block, an iron yoke cushion block partition plate I is arranged between the upper iron yoke and the lower iron yoke of the iron core and the iron yoke cushion block and comprises an upper iron yoke cushion block partition plate I and a lower iron yoke cushion block partition plate I, the horizontal part of a corner ring I at the upper end is positioned between an upper insulating cushion block I and the upper iron yoke partition plate I of the secondary winding, and the horizontal part of the corner ring I at the lower end is positioned between the lower; and an insulating cushion block I is also arranged between the iron yoke cushion block and the secondary winding and comprises an upper insulating cushion block I and a lower insulating cushion block I.
A primary winding with a tapping head is arranged outside a secondary winding, a main channel between the primary winding and the secondary winding is provided with an insulating paper board, a stay chain II and an angle ring II, the upper end and the lower end of the stay chain II are provided with grooves, and a vertical part of the angle ring II is placed; an upper insulation cushion block II is arranged between the upper iron yoke cushion block and the primary winding, a lower insulation cushion block II is arranged between the lower iron yoke cushion block and the primary winding, the horizontal part of the upper corner ring II is positioned between the upper insulation cushion block II of the primary winding and the upper iron yoke partition cushion block I, the horizontal part of the lower corner ring II is arranged between the lower insulation cushion block II and the lower iron yoke partition cushion block I, the creepage distance of a secondary winding conductor is increased, the safety of a product is improved, meanwhile, the insulation distance inside a transformer product is shortened, the product volume is reduced, and the product cost is reduced.
The primary winding and the secondary winding of the transformer body are of a two-section multilayer cylindrical structure, the voltage between layers can be effectively reduced, the electric field inside the coil is more uniformly distributed, the impact resistance is good, the cylindrical structure is high in filling coefficient, good in space utilization and capable of saving raw materials.
The primary winding and the secondary winding of the transformer adopt an integral winding structure.
L-shaped insulating partition plates are further arranged between the winding A phase and the winding B phase, between the upper yoke cushion block and the upper yoke cushion block partition plate I on the outer side of the primary winding, and between the lower yoke cushion block partition plate I and the lower yoke cushion block.
The iron core adopts a 45-degree five-step stacked three-phase three-column type.
The rated voltage ratio of the primary and secondary windings of the transformer is 35/35kV, in order to reduce interlayer voltage and improve the distribution of an electric field in the windings, the primary and secondary windings adopt a two-section multilayer cylindrical structure, have the advantages of high filling coefficient, good impact voltage distribution and the like, and ensure good electrical performance of products; the 35kV on-load voltage regulation isolation transformer can regulate the tapping turns of a primary winding through an on-load tapping switch under the condition of load, so that on-load voltage regulation is realized, and the power supply quality requirement caused by the fluctuation of system voltage is met; meanwhile, the 35kV on-load voltage regulation isolation transformer winding is reasonable in structural design, and voltage isolation of the primary side and the secondary side can be realized; the integral structure has the characteristics of safe and reliable performance and convenient maintenance.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic view of the insulation structure of the body of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 and 2, the oil tank 1 adopts a plate radiator structure, and has good heat dissipation capability, and can dissipate heat generated by the transformer. In transformer ware body 2 located oil tank 1, 1 top of oil tank is located to case lid 3, and both sides are equipped with evenly distributed's business turn over line 35kV porcelain bushing 5 around the 3 top surfaces of case lid, and the left side of 3 top surfaces of case lid is equipped with on-load tap-changer 4, and 3 top surfaces of case lid right sides are equipped with storage oil tank 6.
As shown in figure 3, the secondary winding 17 of the utility model is arranged outside the iron core column 7, an angle ring I9 is arranged between the secondary winding 17 and the iron core 7, an angle chain I8 is arranged between the outside of the iron core 7 and the inner diameter of the secondary winding 17, grooves are arranged at the upper end and the lower end of the angle chain I8, a vertical part for placing the angle ring I9 is arranged, the horizontal part of the angle ring I9 is arranged between an upper iron yoke cushion block baffle plate I10 and an upper iron yoke cushion block 11, between a lower iron yoke cushion block baffle plate I23 and a lower iron yoke cushion block 21, an insulating cushion block I is also arranged between the iron yoke cushion block and the secondary winding, the transformer comprises an upper insulation cushion block I12 and a lower insulation cushion block I19, the structural design of the secondary winding increases the creepage distance of the secondary winding, improves the safety of the product, meanwhile, the insulation distance in the transformer product is shortened, the product volume is reduced, and the product cost is reduced.
As shown in fig. 3, the primary winding 18 and the secondary winding 17 of the present invention adopt an integral winding structure, the primary winding 18 with a tapping outlet is arranged outside the secondary winding 17, a main empty channel between the primary and secondary windings is provided with an insulating paper board 13, a supporting chain II 14 and an angle ring II 15, the supporting chain II 14 is arranged between the outside of the secondary winding 17 and the inner diameter of the primary winding 18, the upper and lower ends of the supporting chain II 14 are provided with grooves for placing the vertical part of the angle ring II 15, the horizontal part of the angle ring II 15 is positioned between the upper insulating cushion block II 16 of the primary winding 18 and the upper iron yoke cushion block 11, and between the lower insulating cushion block II 20 and the lower end of the lower iron yoke cushion block 21; l-shaped insulating partition plates 22 are further arranged between the winding A phase and the winding B phase, and between the upper yoke cushion block 11 and the upper yoke cushion block partition plate I10 on the outer side of the primary winding, and between the lower yoke cushion block partition plate I23 and the lower yoke cushion block 21. The creepage distance of the primary winding is increased, the insulation distances between the primary winding and the secondary winding and between the primary winding and the iron core upper and lower iron yokes are effectively reduced, the insulation performance of the product is improved, and the safety of the product is enhanced.
The horizontal part of the angle ring II 15 is positioned between the upper side of an upper insulation cushion block II 16 of the primary winding 18 and the lower surface of an upper iron yoke cushion block 11 and between the lower side of a lower insulation cushion block II 20 and a lower iron yoke cushion block 21, so that smooth oil flow of the secondary winding is prevented, and the heat dissipation area of the secondary winding is effectively ensured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention without creative work.
Claims (5)
1. The utility model provides a 35kV on-load voltage regulation isolation transformer, includes the oil tank, locates the transformer ware body in the oil tank to and locate the case lid at oil tank top, its characterized in that: the oil tank adopts a finned radiator structure, the front side and the rear side of the top surface of the tank cover are provided with evenly distributed inlet and outlet wire 35kV porcelain sleeves, the right side of the top surface of the tank cover is provided with an oil conservator, and the left side of the top surface of the tank cover is provided with a load tap changer;
the primary winding and the secondary winding of the transformer adopt an integral winding structure;
the secondary winding is sleeved outside the iron core column, an angle ring I is arranged between the secondary winding and the iron core column and the iron yoke of the iron core, a stay chain I is arranged between the outside of the iron core column and the secondary winding, grooves are formed in the upper end and the lower end of the stay chain I, and the vertical part of the angle ring I is placed; an iron yoke cushion block is arranged between an upper iron yoke and a lower iron yoke of an iron core and the upper end and the lower end of a secondary winding, the iron yoke cushion block comprises an upper iron yoke cushion block and a lower iron yoke cushion block, an iron yoke cushion block partition plate I is arranged between the upper iron yoke and the lower iron yoke of the iron core and the iron yoke cushion block and comprises an upper iron yoke cushion block partition plate I and a lower iron yoke cushion block partition plate I, the horizontal part of a corner ring I at the upper end is positioned between the upper iron yoke cushion block and the upper iron yoke partition plate I of the secondary winding, and the horizontal part of the corner ring I at the lower end is positioned between the lower; and an insulating cushion block I is also arranged between the iron yoke cushion block and the secondary winding and comprises an upper insulating cushion block I and a lower insulating cushion block I.
2. The 35kV on-load tap changing isolation transformer of claim 1, wherein: a primary winding with a tapping head is arranged outside a secondary winding, a main channel between the primary winding and the secondary winding is provided with an insulating paper board, a stay chain II and an angle ring II, the upper end and the lower end of the stay chain II are provided with grooves, and a vertical part of the angle ring II is placed; an upper insulation cushion block II is arranged between the upper iron yoke cushion block and the primary winding, a lower insulation cushion block II is arranged between the lower iron yoke cushion block and the primary winding, the horizontal part of the upper end angle ring II is positioned between the upper insulation cushion block II of the primary winding and the upper iron yoke partition cushion block I, and the horizontal part of the lower end angle ring II is arranged between the lower insulation cushion block II and the lower iron yoke partition cushion block I.
3. The 35kV on-load tap changing isolation transformer of claim 1, wherein: the primary winding and the secondary winding of the transformer body adopt a two-section multilayer cylindrical structure.
4. The 35kV on-load tap changing isolation transformer of claim 1, wherein: l-shaped insulating partition plates are further arranged between the winding A phase and the winding B phase, between the upper yoke cushion block and the upper yoke cushion block partition plate I on the outer side of the primary winding, and between the lower yoke cushion block partition plate I and the lower yoke cushion block.
5. The 35kV on-load tap changing isolation transformer of claim 1, wherein: the iron core adopts a 45-degree five-step stacked three-phase three-column type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021045591.1U CN212010670U (en) | 2020-06-09 | 2020-06-09 | 35kV on-load voltage regulation isolation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021045591.1U CN212010670U (en) | 2020-06-09 | 2020-06-09 | 35kV on-load voltage regulation isolation transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212010670U true CN212010670U (en) | 2020-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021045591.1U Active CN212010670U (en) | 2020-06-09 | 2020-06-09 | 35kV on-load voltage regulation isolation transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212010670U (en) |
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2020
- 2020-06-09 CN CN202021045591.1U patent/CN212010670U/en active Active
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