Wire connection structure between high-voltage windings of ultra-high voltage transformer
A high-voltage winding and transformer technology, which is applied in the field of transformer manufacturing, can solve the problems of limited current-carrying capacity of lead wires, complex process processing, small lead wire area, etc., and achieve the effects of simple structure, uniform electric field distribution, and improved current-carrying capacity
Active Publication Date: 2014-11-12
TBEA HENGYANG TRANSFORMERS
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Problems solved by technology
The connection between the traditional high-voltage windings of transformers above 500kV, due to the high voltage, the lead wire area is small and irregular in shape, and the electric field is high. Reduce partial discharge, but in this structure, because the copper tube does not carry current, the current-carrying capacity of the lead wire is greatly limited, and the process is more complicated, which brings difficulties to production
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[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] like figure 1 As shown, in this embodiment, the high-voltage winding of the UHV transformer adopts a structure of two columns connected in series. Among them, the two columns of the high-voltage winding are the A column and the X column. The head of the high-voltage coil A column is the middle outlet, the end of the A column is the upper and lower end outlets, and the X column head is the middle outlet. The high-voltage winding adopts a connection structure in which the two ends of the A column are connected in parallel and then connected in series with the head end of the X column. The induced potential in this series connection structure can reach about 700kV. Correspondingly, the shape of the connection struct...
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Abstract
The invention provides a wire connection structure between high-voltage windings of an ultra-high voltage transformer, comprising a copper pipe (5); two ends of the copper pipe (5) are respectively connected with a copper rod (4); the two copper rods (4) are respectively connected with two coil outlets (11) at the tail end of a high-voltage winding A; the middle part of the copper pipe (5) is also connected with a second copper rod (9) which is connected with a coil outlet at the head end of a high-voltage winding X; and the copper pipe (5), the two copper rods (4) and the second copper rod (9) are wrapped by insulation structures. With the adoption of the wire connection structure, the electrode shape can be effectively improved, the electric field concentration can be decreased, the local discharge can be reduced, and the current carrying capability is improved; and the wire connection structure is simple in structure and convenient for mounting.
Description
technical field [0001] The invention belongs to the technical field of transformer manufacturing, and in particular relates to a wiring structure between high-voltage winding columns of an ultra-high voltage transformer. Background technique [0002] In recent years, with the rapid development of my country's electric power industry, the demand for large-capacity, UHV transformers has been increasing. With the gradual accumulation of experience and the introduction of foreign manufacturing technology, domestic UHV power transformers have made great progress in terms of structure and performance parameters. A large amount of scientific research has been carried out on related issues such as short-circuit strength and short-circuit strength, supplemented by computer CAD design, and various research results and foreign advanced technologies are gradually applied to products. With the development of the power industry, power transformers are developing towards ultra-high voltag...
Claims
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IPC IPC(8): H01F27/28H01F27/32
Inventor 陈东风代斌李勇伍纯红
Owner TBEA HENGYANG TRANSFORMERS