A coil connection structure of a transformer

Abstract

The invention discloses a coil connection structure of a transformer, which includes an A-pillar coil and an X-pillar coil. Both the A-pillar coil and the X-pillar coil include a high-voltage coil and a medium-voltage coil. The first ends of the medium-voltage coils are connected to form the first connecting line, and there is a notch on the electrostatic plate of the high-voltage coil of the X column along the circumferential direction, and a connecting wire is placed at the notch, and the connecting wire passes along the circumferential direction of the electrostatic plate An electrostatic plate, one end of which is connected to the first connecting line, and the other end is connected to the end of the high-voltage coil of the X-pillar to form an intermediate connecting line, and the intermediate connecting line is connected to the head of the medium-voltage coil of the X-pillar to form a second connecting line. line, and finally lead to the outlet end. The connection structure of the invention can not only meet the requirement of electric insulation distance, but also simplify the structure and facilitate the construction of the connection structure of the transformer.

Description

technical field [0001] The invention belongs to the technical field of transformers, and relates to a coil connection structure of a transformer, in particular to a coil connection structure of a high-voltage oil-immersed power transformer with a voltage level of 500kV. Background technique [0002] For single-phase ultra-high voltage and ultra-large-capacity oil-immersed autotransformers, the number of turns of the coil is large. In order to meet the requirements of the outer limit of transportation, a parallel structure of double-column or multi-column coils is often used. For the use of double-column single-phase autotransformers, the conventional structure currently used is that the first end of the medium-voltage coil of one column goes out axially and passes through the pressure plate, leads to the outside of the coil and passes through the pressure plate of the other column, and The medium pressure head ends of the columns are drawn side by side, and then led to the o...

AI Technical Summary

Problems solved by technology

However, for an autotransformer with a voltage level of 500kV at the end of the high-voltage coil (the head end of the medium-voltage coil), when this conventional structure is adopted, when the 500kV lead wire passes through the other column from one column, the clamp web, clip The insulation distance of parts such as the oil guide box, the magnetic shield of the clip, and the drawstring frame are very tight, and the wiring structure is relatively complicated. Therefore, the 500kV connection method at the end has also become a difficult point in the design of the ultra-high voltage autotransformer

Images