Improved characterization of Multi-Stage Voltage Dips based on the Space Phasor Model
Journal article, 2018

This paper proposes a method for characterizing voltage dips based on the space phasor model of the three phase-to-neutral voltages, instead of the individual voltages. This has several advantages. Using a K-means clustering algorithm, a multi-stage dip is separated into its individual event segments directly instead of first detecting the transition segments. The logistic regression algorithm fits the best single-segment characteristics to every individual segment, instead of extreme values being used for this, as in earlier methods. The method is validated by applying it to synthetic and measured dips. It can be generalized for application to both single- and multi-stage dips.

Machine learning algorithms

Voltage dips

Electric power transmission

Electric power distribution

Logistic regression

Clustering algorithms

Power quality


Azam Bagheri

Luleå University of Technology

Mathias Bollen

Luleå University of Technology

Irene Yu-Hua Gu

Chalmers, Electrical Engineering, Signalbehandling och medicinsk teknik, Signal Processing

Electric Power Systems Research

0378-7796 (ISSN)

Vol. 154 319-328

Areas of Advance


Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Signal Processing



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