Method and system for determining phasor components of a periodic waveform

US10309995B2 · kind B2 · utility

Assignee

• ABB Schweiz AG · CH

Inventors

• Nilanga Abeywickrama · Västerås, SE
• Robert Saers · Almirante Tamandaré, BR
• Tord Bengtsson · Västerås, SE
• Jonas Hedberg · Västerås, SE

Key dates

• Filing date: Oct 5, 2016
• Grant date: Jun 4, 2019
• Expiry date: Oct 5, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y04S10/22
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of determining phasor components of a periodic waveform, wherein the method includes: a) sampling the periodic waveform, b) determining a frequency spectrum of the sampled periodic waveform by means of a frequency transform utilizing a Gaussian window function, wherein a ratio np defined by the duration of the sampling of the periodic waveform divided by the width parameter of the Gaussian window function is at least 5, c) selecting a region of the frequency spectrum containing a frequency peak defined by a group of consecutive frequency bins each being defined by a frequency value and a magnitude value, and d) determining phasor components of the periodic waveform based on the group of consecutive frequency bins.