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

A 110 kV three-phase dry-type transformer, wherein the 110 kV three-phase dry-type transformer comprises three single-phase dry-type transformers, and each single-phase dry-type transformer comprises:

• an incoming line side and an outgoing line side, the incoming line side comprising an incoming-line-side iron core column, a first low-voltage coil and an incoming-line-side high-voltage coil, the outgoing line side comprising an outgoing-line-side iron core column, a second low-voltage coil and an outgoing-line-side high-voltage coil;
• the incoming-line-side high-voltage coil comprising a first incoming-line-side high-voltage coil and a second incoming-line-side high-voltage coil, the outgoing-line-side high-voltage coil comprising a first outgoing-line-side high-voltage coil and a second outgoing-line-side high-voltage coil, the first incoming-line-side high-voltage coil being connected in parallel with the second incoming-line-side high-voltage coil, and the first outgoing-line-side high-voltage coil being connected in parallel with the second outgoing-line-side high-voltage coil;
• the incoming-line-side iron core column and the outgoing-line-side iron core column being provided opposite to each other, the incoming-line-side iron core column, the first low-voltage coil and the incoming-line-side high-voltage coil being provided in sequence at an interval, and the outgoing-line-side iron core column, the second low-voltage coil and the outgoing-line-side high-voltage coil being provided in sequence at an interval;
• a first end for connecting in parallel the first incoming-line-side high-voltage coil and the second incoming-line-side high-voltage coil being provided in a middle of the incoming-line-side high-voltage coil as a first incoming line end, and a second end for connecting in parallel the first incoming-line-side high-voltage coil and the second incoming-line-side high-voltage coil being provided at an end of the incoming-line-side high-voltage coil as a first outgoing line end;
• a first end for connecting in parallel the first outgoing-line-side high-voltage coil and the second outgoing-line-side high-voltage coil being provided in a middle of the outgoing-line-side high-voltage coil as a second incoming line end, and a second end for connecting in parallel the first outgoing-line-side high-voltage coil and the second outgoing-line-side high-voltage coil being provided at an end of the outgoing-line-side high-voltage coil as a second outgoing line end;
• the first outgoing line end being connected with the second incoming line end;
• and
• the three single-phase dry-type transformers being connected through three second outgoing line ends.