A Novel Approach for Elimination of Defects of Blocking and Unblocking in Distance Relays during Power Swing

Amirreza Mehri, Kazem Mazlumi (), Hamed HashemiDezaki, Mohammad Hasan Mansouri and Ramin Mahyaei
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Amirreza Mehri: Electrical Engineering Department, Faculty of Engineering, University of Zanjan, Zanjan 45371-38791, Iran
Kazem Mazlumi: Electrical Engineering Department, Faculty of Engineering, University of Zanjan, Zanjan 45371-38791, Iran
Hamed HashemiDezaki: Faculty of Electrical and Computer Engineering, University of Kashan, Kashan 87317-53153, Iran
Mohammad Hasan Mansouri: Electrical Engineering Department, Iran University of Science and Technology, Tehran 16846-13114, Iran
Ramin Mahyaei: Electrical Engineering Department, Iran University of Science and Technology, Tehran 16846-13114, Iran

Sustainability, 2023, vol. 15, issue 18, 1-21

Abstract: In power systems, distance relays are commonly employed as the primary protection for transmission lines, and their operation is of utmost importance. Power swings are a type of phenomenon that can lead to improper functioning of conventional distance relays, posing a threat to the uninterrupted flow of electrical power. The occurrence of a power swing disrupts the impedance measured by the relay, causing it to deviate from the normal load condition and enter the relay tripping zones. This research paper introduces a novel method based on the Prony method for extracting current waveform components, enabling fault detection during power swings. Subsequently, the proposed method’s accuracy is assessed through simulations implemented on a nine-bus power system, involving three-phase current signal processing and the application of the proposed algorithm. Various fault scenarios encompassing varying fault distances from the relay position, fault resistances, and power angles within the 9-bus system are simulated to encompass a wide range of fault environments. The simulation results demonstrate the effectiveness of the proposed algorithm in detecting all types of faults, including symmetrical and asymmetrical faults, during power swings.

Keywords: fault detection; power swing; distance relay; prony method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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