Non-linear dynamics based sub-synchronous resonance index by using power system measurement data

Hwanhee Cho, Seungchan Oh, Suchul Nam, Byong Jun Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

This study proposes a time-series analysis approach and a non-linear dynamics originated method to detect subsynchronous oscillation in power systems. Mathematical expressions of the fundamental instantaneous signal and sample discrete signal of peak values are derived to examine the phenomenon of interaction between power system components. The results of the circulating trajectory are shown in a two-dimensional map of the calculated root-mean-square value and estimated Floquet multiplier when two signals of different modes are mixed. Without applying a digital filter or frequency decomposition, non-linear oscillation detection is possible by monitoring a non-linear oscillatory index based on the maximum Lyapunov exponent.

Original languageEnglish
Pages (from-to)4026-4033
Number of pages8
JournalIET Generation, Transmission and Distribution
Volume12
Issue number17
DOIs
Publication statusPublished - 2018 Sep 30

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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