公开(公告)号：US20190041437A1

公开(公告)日：2019-02-07

申请号：US16075858

申请日：2017-02-13

Applicant: ABB Schweiz AG

Inventor： Nilanga Abeywickrama ,  Svante Karlsson ,  Tord Bengtsson

IPC: G01R21/133 ,  G01R19/25 ,  G01R31/02

CPC classification number: G01R21/1331 ,  G01R19/2513 ,  G01R21/133 ,  G01R29/20 ,  G01R31/027

Abstract: A system and a method for determining the power loss of a transformer. The method includes measuring voltage and current at the primary side of the transformer, calculating input power by multiplying the measured current and voltage on the primary side of the transformer; measuring voltage and current at the secondary side of the transformer, calculate a nominal error ratio, calculating output power by multiplying the measured current and voltage on the secondary side of the transformer. The method further involves calculating a first corrected power loss by means of multiplying the input power with the nominal error ratio and subtract the output power.

公开(公告)号：US10416209B2

公开(公告)日：2019-09-17

申请号：US16075858

申请日：2017-02-13

Applicant: ABB Schweiz AG

Inventor： Nilanga Abeywickrama ,  Svante Karlsson ,  Tord Bengtsson

IPC: G01R21/133 ,  G01R19/25 ,  G01R31/02 ,  G01R29/20

Abstract: A system and a method for determining the power loss of a transformer. The method includes measuring voltage and current at the primary side of the transformer, calculating input power by multiplying the measured current and voltage on the primary side of the transformer; measuring voltage and current at the secondary side of the transformer, calculate a nominal error ratio, calculating output power by multiplying the measured current and voltage on the secondary side of the transformer. The method further involves calculating a first corrected power loss by means of multiplying the input power with the nominal error ratio and subtract the output power.