Three-phase and single-phase universal integrated full-capacity power transformer

Abstract

The invention discloses a three-phase and single-phase universal integrated full-capacity power transformer which comprises a transformer iron core, the transformer iron core is of a five-column structure, phase modulation switches are additionally arranged at the head and the tail of a high-voltage B phase, the head end of the high-voltage B phase is located on the upper portion during three-phase operation, the head end of the high-voltage B phase is located on the lower portion during single-phase operation, and the heads and the tails of low-voltage three phases are all led out. And D, Y and i outputs can be realized through copper bar connection, and b phases are reversely connected end to end during i output. A five-column iron core is adopted, a phase modulation switch is additionally arranged on a high-voltage B phase, and low-voltage end-to-end leading-out is carried out, so that a conventional three-phase integrated power transformer can be used as a full-capacity single-phase transformer. Compared with a traditional three-phase combined transformer, the cost can be reduced by 30%, and the occupied area can be reduced by 50%.

Description

technical field [0001] The invention relates to the manufacturing technology of transformer products, in particular to a three-phase and single-phase universal integrated full-capacity power transformer. Background technique [0002] The transformer is a very important power transmission equipment. The conventional three-phase integrated power transformer can operate with a single-phase load of 1 / 3 capacity for a short time, and cannot be used as a single-phase transformer for a long time. The three-phase combined type composed of three single-phase transformers Transformers can be used as single-phase transformers, but they are bulky, occupy a large area, and are expensive. CN03234800.2 discloses a three-phase combined transformer with a single-phase magnetic circuit and a common circuit. The oil tanks of three independent magnetic circuit single-phase transformers are connected in turn with oil pipes with detachable pipe joints, and the three single-phase transformers are...

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Problems solved by technology

[0002] The transformer is a very important power transmission equipment. The conventional three-phase integrated power transformer can operate with a single-phase load of 1 / 3 capacity for a short time, and cannot be used as a single-phase transformer for a long time. The three-phase combined type composed of three single-phase transformers Transformers can be used as single-phase transformers, but they are bulky, occupy a large area, and are expensive

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