Open AccessDetecting instant of multiple faults on the transmission line and its types using time–frequency analysis
Author(s) -
Na Shweta,
Kishor Nand,
Uhlen Kjetil,
Mohanty Soumya Ranjan
Publication year - 2019
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2018.5572
Subject(s) - phasor , fault (geology) , relay , fault indicator , real time digital simulator , real time computing , computer science , electric power system , power system protection , electric power transmission , reliability (semiconductor) , phasor measurement unit , transmission line , line (geometry) , fault detection and isolation , signal (programming language) , fault coverage , stuck at fault , electronic engineering , protective relay , power (physics) , engineering , electrical engineering , telecommunications , quantum mechanics , physics , mathematics , artificial intelligence , actuator , geometry , electronic circuit , programming language , seismology , geology
In a complex interconnected network, due to dynamic interaction between the AC networks, during occurrences of faults, the successful relay operation is threatened. For security and reliability of the power system network, a fast and accurate protection scheme is of great importance. This study presents a protection scheme for multiple fault detection at bus/line and its type in a wide area network. If a fault occurs on a line, followed by another fault at the same/different line, before the clearance of former fault, the proposed scheme is capable of detecting such multiple fault events. The scheme applies processed signal information for its time–frequency representation using Smoothed Pseudo Wigner–Ville distribution, followed by Hilbert transform and calculation of indices to interpret the fault events. It is shown that faulted bus, faulted line, time instant, and types of faults can be easily identified with low computational burden. The scheme is validated on the signals simulated on Kundur's model, IEEE 39 bus system and verified with signals on real‐time digital simulator for different fault conditions; fault resistance and fault location on the line. The scheme can be successfully applied on signals available from phasor measurement units for wide area network protection.