Jiangsu Huapeng Transformer Co., Ltd.

Qinggan Zeng

Guowei Zhou

Bin Cao

Yingping Wang

Qi Chen

Tianping Wang

Zhaowei Ma

Chenming Shi

Provided is a three-phase dry-type transformer. The three-phase dry-type transformer comprises three single-phase dry-type transformers connected to each other. Each single-phase transformer comprises an incoming line side high-voltage coil and an outgoing line side high-voltage coil, wherein the incoming line side high-voltage coil is provided with an incoming line end and an outgoing line end, and the outgoing line side high-voltage coil is provided with an incoming line end and an outgoing line end. The outgoing line end of the incoming line side high-voltage coil is connected to the incoming line end of the outgoing line side high-voltage coil, such that the incoming line side high-voltage coil and the outgoing line side high-voltage coil are connected in series. Further provided is an assembly method.

110 kV three-phase dry-type transformer and assembly method therefor

A three-phase 48-pulse rectifier transformer includes two 24-pulse rectifier transformers phase-shifted through valve-side output windings. Each 24-pulse rectifier transformer has two sets of grid-side input windings and four sets of valve-side output windings. The two sets of grid-side input windings are connected in parallel and axially arranged in a split manner. Among the four sets of valve-side output windings, two sets of valve-side output windings are radially arranged in a split manner corresponding to one set of grid-side input windings, and the other two sets of valve-side output windings are also radially arranged in a split manner corresponding to the other set of grid-side input windings. The two sets of valve-side output windings that are radially split and the other two sets of valve-side output windings that are radially split are axially arranged in a split manner. The grid-side input windings of the two 24-pulse rectifier transformers are phase-shifted with respect to each other. In this way, a uniform difference of 7.5&#xb0; is produced in voltages of the eight sets of valve-side output windings of the two 24-pulse rectifier transformers, and the eight sets of valve-side output windings of the two 24-pulse rectifier transformers are correspondingly connected to rectifiers to form a uniform 48-pulse rectifier transformer, which not only reduces the harmonic current generated by the rectifier, but also improves the load capacity of the rectifier.

Three-phase 48-pulse rectifier transformer

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Jiangsu, China

Qinggan Zeng