Voltage-regulating middle insulation structure of 330kV on-load voltage-regulating transformer

Abstract

The invention relates to a voltage-regulating middle insulation structure of a 330kV on-load voltage-regulating transformer, and belongs to the technical field of the transformer equipment. The technical scheme is as follows: the structure comprises a voltage-regulating coil one (1), a 330kV lead outgoing device (4), a voltage-regulation coil two (5), a composite insulation cylinder (6) and an insulation paper ring (7); the 330kV lead outgoing device (4) is arranged between the voltage-regulating coil one (1) and the voltage-regulating coil two (5); the composite insulation cylinder (6) and the insulation paper ring (7) are filled among the voltage-regulating coil one (1), the 330kV lead outgoing device (4) and the voltage-regulating coil two (5); the insulation paper ring (7) is arrangedat the middle location beside the 330kV lead outgoing device (4), the composite insulation cylinder (6) is arranged at two ends of the insulation paper coil (7); and the composite insulation cylinder(6) is formed by sleeving an insulation cylinder (10) and a stay (11). The voltage-regulating middle insulation structure disclosed by the invention improves the insulation intensity at the middle ofthe 330kV on-load voltage-regulating transformer, reduces the local discharge possibility, and simple in manufacturing and sleeving.

Description

technical field [0001] The invention relates to an insulating structure in the middle part of a 330kV on-load voltage regulating transformer for voltage regulation, and belongs to the technical field of transformer equipment. Background technique [0002] For a conventional 330kV on-load tap changer, the middle part between the upper and lower voltage regulating coils adopts an end ring insulation structure. Since the end ring is a structure made of paper rings and pads glued with PVC, it is easy to generate air bubbles and often cause partial discharge. And the number of end rings is large, and the production and assembly are complicated. Contents of the invention [0003] The object of the present invention is to provide a 330kV on-load tap changer with a voltage regulating middle insulation structure, which uses a composite insulating cylinder and an insulating paper ring to improve the insulation strength, reduce the probability of partial discharge, and effectively so...

AI Technical Summary

Problems solved by technology

[0002] For a conventional 330kV on-load tap changer, the middle part between the upper and lower voltage regulating coils adopts an end ring insulation structure. Since the end ring is a structure made of paper rings and pads glued with PVC, it is easy to generate air bubbles and often cause partial discharge. And the number of end rings is large, and the production and assembly are complicated

Images