Title:
SIGNAL ANALYSIS METHOD, AND APPARATUS FOR THREE-PHASE SYSTEM, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/038779
Kind Code:
A1
Abstract:
The present invention provides an apparatus and method enabling to perform a 2-dimensional trajectory analysis applicable for a three-phase system. A signal analysis apparatus generates a three-row and N-column waveform matrix constituted by three N dimensional row vectors having respectively N samples of first to third phase current values obtained from three-phase current signals measured in a three-phase system, where N is the number of samples of each of the three-phase current signals in one cycle of an AC power supply; applies transformation to the waveform matrix to obtain a two-row and N-column matrix constituted by the first and second N dimensional row vectors; performs normalization in amplitude of the first and second N dimensional row vectors, respectively; selects a grid size based on the sample number N; and maps a two dimensional trajectory made up from the first and second normalized N dimensional row vectors on a grid with the grid size selected.
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Inventors:
PETLADWALA MURTUZA (JP)
Application Number:
PCT/JP2019/033850
Publication Date:
March 04, 2021
Filing Date:
August 29, 2019
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H02J13/00; G01R21/00
Domestic Patent References:
| WO2018199312A1 | 2018-11-01 |
Foreign References:
| JP2017221023A | 2017-12-14 | |||
| JP2003319698A | 2003-11-07 | |||
| JPH04324372A | 1992-11-13 | |||
| JP2005102428A | 2005-04-14 |
Attorney, Agent or Firm:
KATO, Asamichi (JP)
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