Transformer with on-load tap changer

摘要

The invention relates to a transformer with a tap changer, wherein optionally the primary or secondary side can be regulated by the tap changer, and wherein, on the side of the transformer to be regulated, a main winding and at least one regulating winding, which is connectable by the tap changer, are provided. According to the invention, the main winding is divided into two main winding parts, and the at least one regulating winding and the tap changer (3) connecting the regulating winding are arranged electrically between the two main winding parts (1, 2).

主权项

1. A transformer with a tap changer wherein
the transformer comprises a primary side and a secondary side, one of sides can be regulated by the tap changer and has one main winding and at least one regulating winding connectable by the tap changer, the main winding is divided into two main winding parts, the at least one regulating winding and the tap changer connecting the regulating winding are arranged electrically between the two main winding parts, the tap changer comprises first and second modules that each comprise one respective partial winding of the regulating winding and on both sides thereof two respective bypass paths, each bypass path comprises one series connection of two respective semiconductor switching components, one center tap is provided between the serially connected switching components of each bypass path, the partial windings possess different numbers of turns, one of the two center taps of each module is connected to a center tap of the adjacent module, and the other center tap of the first module is electrically connected to the one main winding part, and the other center tap of the second module is electrically connected to the other main winding part.