公开(公告)号：US20220102049A1

公开(公告)日：2022-03-31

申请号：US17436363

申请日：2020-03-05

Applicant: ABB Power Grids Switzerland AG

Inventor： Stephane Isler ,  Valter Porcellato

IPC: H01F27/10 ,  G01K7/42 ,  H01F27/40

Abstract: A transformer assembly includes an electric transformer a temperature sensor system, and a computation unit for determining a thermal state of the electric transformer. The electric transformer includes a cooling device having at least one liquid coolant channel absorb exhaust heat from the electric transformer a heat spreader for transferring heat from the liquid coolant to a heat dissipation surface of the heat spreader, and an air blower configured to effect an airstream along the heat dissipation surface. The temperature sensor system includes an entering coolant sensor for providing an entering coolant temperature signal, a leaving coolant sensor for providing a leaving coolant temperature signal, an entering airstream sensor for providing an entering airstream temperature signal, and a leaving airstream sensor for providing a leaving airstream temperature signal. The computation unit is configured to determine a thermal state of the transformer.