Patent ID: 9618950
Date: 2017-04-11
CPC Classifications: G05F,H01F,H02J,H02M,Y02E

Claim:
1. A voltage control system for medium voltage applications, comprising: a booster-transformer and a feeder-transformer, each of the booster-transformer and the feeder-transformer having a respective primary winding and a secondary winding, wherein the secondary winding of the feeder-transformer is electrically connected with the primary winding of the booster-transformer by an intermediate circuit, wherein at least one of the transformer windings in the intermediate circuit comprises at least two taps, from which one can be selected as an active tap, and wherein electrically adjacent taps are assigned to different groups; one or more contactor switches which are associated with each of the taps which are selectively switchable into the intermediate circuit , wherein not more than one contactor switch of a group is switchable at the same time; one or more commutation resistors connected in series with the taps of each group; and a connector configured to connect the secondary winding of the booster transformer with an electrical energy supply network such that the secondary winding of the booster transformer is connected in series with a transmission line having a voltage that is to be controlled.