CN201229836Y

CN201229836Y - Low voltage winding construction for high voltage large capacity electric power transformer

Info

Publication number: CN201229836Y
Application number: CNU2008200140187U
Authority: CN
Inventors: 曲鸣; 孙传民
Original assignee: SHENBIAN MEDIUM-SIZED TRANSFORMER Co Ltd SHENYANG
Current assignee: SHENBIAN MEDIUM-SIZED TRANSFORMER Co Ltd SHENYANG
Priority date: 2008-07-15
Filing date: 2008-07-15
Publication date: 2009-04-29
Anticipated expiration: 2018-07-15

Abstract

The utility model relates to a low-voltage winding structure of a high-voltage and large-capacity power transformer, which is applicable to large-capacity power transformers or rectifier transformers or furnace transformers with the high voltage being equal to above 63 kV and low voltage being equal to or below 35 kV. The low-voltage winding structure comprises a longitudinal oil duct and an outlet connector. The low-voltage winding structure is characterized in that a copper foil or an aluminum foil is used as a conducting wire coil or a foil coil which is continuously manufactured through layer insulation, and copper bars, aluminum bars or aluminum and copper connectors which are served as outlet connectors are welded at the head end and the tail end of the coil to form the low-voltage winding structure; a dispensing insulating paper or a dispensing insulating film is used as the layer insulation also called the turn insulation; also a plurality of foil coils can be connected in series through connecting conducting bars to form the low-voltage winding structure. The low-voltage winding structure solves the problems of complex welding technology, incompact structure, high additional loss and poor short-circuit mechanical strength bearing in the prior art.

Description

High voltage large capcity power transformer low pressure winding construction

Technical field

The utility model belongs to the general parts of transformer, be applicable to high pressure 63kV and more than, low pressure is 35kV and following large-capacity power transformer or rectifier transformer or furnace transformer.

Background technology

At present, high pressure is more than 63kV reaches, as 110kV, 220kV, 330kV, low voltage voltage is 35kV and following, as 20kV, 10kV, continous way or helical winding that the winding transposition wire that the low pressure winding of jumbo power transformer is made up of many eradications edge lead or multiple conducting wires forms, laterally oil duct and leading-out terminal thereof goes out formation such as wire terminal.The technical problem of its existence is: 1, because its leading-out terminal is multiple conducting wires and goes out the wire terminal welding that therefore weld relatively difficulty, technology is complexity also; 2, because adopt the continuous windings that thoroughly do away with the coiling of edge lead to replace more and online cake between be provided with the horizontal oil duct that cushion block constitutes, therefore, not only complex process, and loop construction is not compact yet; 3, owing to adopt multiple conducting wires, the length of each root lead can not be absolute consistent, and the width of lead can not obtain too smallly, therefore can cause the supplementary load loss of winding bigger, and it is relatively poor to bear the short circuit mechanical strength simultaneously.

Summary of the invention

For overcoming the technical problem that exists in the prior art, the utility model will provide a kind of coiling convenient, weld out that wire terminal is easier to, the winding supplementary load loss are little, the Short Circuit withstand mechanical strength better, the high voltage large capcity power transformer low pressure winding construction of compact conformation.

The technical solution of the utility model is: comprise vertical oil duct, go out wire terminal.It is characterized in that: the foil coil that turns to continuously as conductive turns and layer insulation by Copper Foil or aluminium foil, and be welded with copper bar or aluminium row or joint of aluminium and copper respectively at its head end and end and constitute as going out wire terminal; Insulate or the title turn insulation as its layer with a glue insulating paper or some glue dielectric film; Also available several foil coils are in series through connecting busbar.

The utility model beneficial effect compared with the prior art is:

1, since the utility model adopt Copper Foil or aluminium foil be conductive turns and with some glue insulating paper or some glue dielectric film as layer insulation or title turn insulation, so coiling and to go out the welding of wire terminal comparatively simple, and compact conformation.

2, constitute by one deck Copper Foil or aluminium foil owing to each conductive turns, and thickness is less, so the winding supplementary load loss are little.

3, because layer insulation or title turn insulation adopt some glue insulating paper or some glue dielectric film, so the Short Circuit withstand mechanical strength is better.

4,, therefore solved umber of turn too much or the width problem of smaller of Copper Foil, aluminium foil owing to can be in series by several foil coils.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the winding example structure schematic diagram that two foil coils constitute;

Fig. 3 is the winding example structure schematic diagram that four foil coils constitute.

Among the figure: 1, end goes out wire terminal, and 2, head end goes out wire terminal, 3, foil coil, 301, layer insulation or claim turn insulation, 302, conductive turns, 4, vertical oil duct, 5, the end insulation, 6, connect busbar.

Embodiment

With reference to Fig. 1-Fig. 3.Embodiment of the present utility model comprises: vertically oil duct 4, go out wire terminal.Its architectural feature is: as conductive turns 302 and layer insulation or claim turn insulation 301 continuous coilings and the foil coil 3 that constitutes, and be welded with respectively at its head end and end that copper bar or aluminium row or joint of aluminium and copper go out wire terminal 2 as head end and end goes out wire terminal 1 formation by Copper Foil or aluminium foil; Insulate or title turn insulation 301 as its layer with a glue insulating paper or some glue dielectric film; Also can be in series through connecting busbar 6, as Fig. 2, shown in Figure 3 by several foil coils 3.Its end insulation 5 is that extension and the filling insulation of layer insulation 301 at two ends constitutes.

Claims

1, high voltage large capcity power transformer low pressure winding construction, comprise vertical oil duct, go out wire terminal, it is characterized in that: the foil coil that turns to continuously as conductive turns and layer insulation by Copper Foil or aluminium foil, and be welded with copper bar or aluminium row or joint of aluminium and copper respectively at its head end and end and constitute as going out wire terminal.

2, high voltage large capcity power transformer low pressure winding construction according to claim 1 is characterized in that: use some glue insulating paper or some glue dielectric film as its layer insulation or title turn insulation.

3, high voltage large capcity power transformer low pressure winding construction according to claim 1 and 2 is characterized in that: also available several foil coils are in series through connecting busbar.