A Novel Approach to Detect Faults Occurring During Power Swings by Abrupt Change of Impedance Trajectory

Jalal Khodaparast, M. Khederzadeh, Filipe Miguel Faria da Silva, Claus Leth Bak

Research output: Contribution to journalJournal articleResearchpeer-review

6 Citations (Scopus)
1 Downloads (Pure)

Abstract

The main purpose of power swing blocking is to distinguish faults from power swings. However, faults occurred during a power swing should still be detected and cleared promptly. This paper proposes an index based on detecting abrupt jump of impedance trajectory by utilization of the predicting capability of the Kalman Filter. The proposed index is calculated by assessing the difference between predicted and actual samples of impedance. The predicted impedance samples are obtained using the Kalman filter and Taylor expansion, which are used in this paper to track the phasor precisely. Second order of Taylor expansion is used to decrease the corrugation effect of impedance estimation and increase the reliability of the proposed method. Furthermore, in order to increase the selectivity of the proposed method, the proposed index is armed with phase comparison logic to detect internal faults. The instantaneous estimation and prediction capability of the Kalman filter are two reasons for proposing the use of Kalman filter. Intensive studies have been performed and the merit of the method is demonstrated by test simulations.
Original languageEnglish
JournalElectric Power Components and Systems
Volume45
Issue number15
Pages (from-to)1638-1652
Number of pages15
ISSN1532-5008
DOIs
Publication statusPublished - 2017

Keywords

  • Kalman Filter
  • Power Swing
  • Dynamic Phasor
  • Symmetrical Fault
  • Impedance trajectory
  • Fault during power swing

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