Transformer voltage regulation lead structure based on vacuum switch

Abstract

The invention provides a transformer voltage regulation lead structure based on a vacuum switch. The transformer voltage regulation lead structure comprises a column I, a column II, a vacuum switch, and a first voltage regulation coil and a second voltage regulation coil which are respectively arranged on the column I and the column II; and the outgoing heads at the upper ends and the lower ends of the first voltage regulating coil and the second voltage regulating coil are respectively connected with the vacuum switch by connecting a voltage regulating lead. Compared with the prior art, the current bearing requirement of the switch can be met, the transformer voltage regulation lead structure has a proper insulation distance and a reasonable insulation margin, the volume structure is small, and the production and transportation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a voltage-regulating lead wire structure of a transformer based on a vacuum switch. Background technique [0002] The voltage regulation method of the converter transformer in the UHV DC transmission project currently in operation and under construction is on-load voltage regulation, the voltage regulation position is the neutral point of the grid side, and the insulation level of the voltage regulation lead wire is required to be LI185AC95kV. The converter transformer usually has a two-column structure, and the conventional structure of its voltage regulation leads is to use two sets of oil-immersed on-load tap-changers, each group of on-load tap-changers is equipped with two potential resistors, and each column of voltage regulation leads is connected to a Group on-load tap-changer. refer to figure 1 with figure 2 As shown, the voltage-regulating lead wires of the two ...

AI Technical Summary

Problems solved by technology

[0004] (1) Each group of on-load tap-changers in the conventional converter transformer lead structure is equipped with two potential resistors, which are large in size and require special bracket support;

[0005] (2) The distance between the side yoke and the inner wall of the oil tank in the long axis direction of the conventional converter transformer lead wire structure is relatively large, and the amount of transformer oil and steel is relatively large;

[0006] (3) The insulation distance and insulation margin in the conventional converter transformer lead structure are unreasonable

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