A TRANSFORMER ASSEMBLY FOR ELECTRIC GRIDS AND A RELATED CONTROL METHOD

摘要

A transformer assembly (1) for electric grids comprising: - an electric transformer (2) comprising a magnetic core (20), a first side (2A) including one or more first windings (21) enchained with said magnetic core and adapted to be electrically connected to a first grid section (50) and a second side (2B) including one or more second windings (22) enchained with said magnetic core and adapted to be electrically connected to a second grid section (60); - a tap changer (3) operatively associated with said electric transformer (2) to vary the number of turns enchained with said magnetic core (20) for said first windings (21). The transformer assembly comprises a control unit (6) operatively coupled with said tap changer (3) to control the operation of said tap changer, said control unit being configured to: - acquire input data (IN) indicative of an electrical connectivity condition of said second grid section (60) with said second windings (22); - basing on said input data (IN), determine whether said transformer (2) is in a load condition or in a no-load condition; - if said transformer (2) is in a no-load condition, command said tap changer to set a maximum available number of turns for said first windings (21).