Patent ID: 11935691
Assignee: HITACHI ENERGY LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC H

Claim 15:
16. A control unit for an electric transformer, the control unit configured to:
operatively couple with a tap changer associated with the electric transformer to control the operation of said tap changer to vary a number of turns enchained with a magnetic core for one or more primary windings of a primary side of the electric transformer;
said control unit configured to:
acquire input data indicative of an electrical connectivity condition of a grid section with one or more secondary windings of a secondary side of the electric transformer;
basing on said input data, determine whether said transformer is in a load condition or in a no-load condition; and
if said transformer is in a no-load condition, command said tap changer to set a maximum available number of turns for said one or more primary windings.