A Novel Approach to Detect Symmetrical Faults Occurring During Power Swings by Using Abrupt change of Impedance Trajectory

Research output: Research - peer-reviewJournal article

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 predicting capability of Kalman Filter. The proposed index is calculated by assessing the dierence between predicted and actual samples of impedance. The predicted impedance samples are obtained using Kalman lter and Taylor expansion, which is used in this paper to track the phasor precisely. Second order of Taylor expansion is used to decrease corrugation eect of impedance estimation and increase the reliability of proposed method. The instantaneous estimation and prediction capability of Kalman lter are two reasons for proposing utilizing Kalman lter. Intensive studies have been performed and the merit of the method is demonstrated by test simulations.
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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 predicting capability of Kalman Filter. The proposed index is calculated by assessing the dierence between predicted and actual samples of impedance. The predicted impedance samples are obtained using Kalman lter and Taylor expansion, which is used in this paper to track the phasor precisely. Second order of Taylor expansion is used to decrease corrugation eect of impedance estimation and increase the reliability of proposed method. The instantaneous estimation and prediction capability of Kalman lter are two reasons for proposing utilizing Kalman lter. Intensive studies have been performed and the merit of the method is demonstrated by test simulations.
Original languageEnglish
JournalElectric Power Components and Systems
ISSN1532-5008
StateAccepted/In press - 2017
Publication categoryResearch
Peer-reviewedYes

    Research areas

  • Kalman Filter, Power Swing, Dynamic Phasor, Symmetrical Fault
ID: 242994461