Patent · US Active

Live measurement method for three-winding transformer loss based on windowed frequency shift

US11422175B2 · kind B2 · utility

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Inventors

Qifeng HUANG · 安丰镇, CN
Xiaoquan Lu · Nanjing, CN
Shihai Yang · Nanjing, CN
Mingming Chen · Tianjin, CN
Zhixin Li · Bound Brook, US
Bo Li · Qingdao, CN
Huiling Su · Nanjing, CN
Xiaodong Cao · Carlsbad, US
Yuqin Chen · Lo Wu, CN
Hanmiao Cheng · Nanjing, CN
Tianchang Liu · Nanjing, CN
Yixuan HUANG · Nanjing, CN
Kaijie Fang · Nanjing, CN

Key dates

Filing date	Oct 27, 2020
Grant date	Aug 23, 2022
Priority date	—
Expiry date	Oct 27, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/62
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Provided is a live measurement method for three-winding transformer loss based on windowed frequency shift. The method includes: step 1: providing an improved live calculation equation of a three-winding transformer loss; step 2: processing a collected x(t) signal by windowed frequency shift calculation; step 3: solving an amplitude and a phase of the collected x(t) signal via discrete Fourier transform of a frequency shift signal; and step 4: calculating a no-load loss and a load loss of a three-winding transformer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.