Open AccessFast phase selection method based on transient current for UHV transmission lines
Author(s) -
Luo Sibei,
Gao Houlei,
Wu Yuehua,
Huang Jiakai,
Wang Dong
Publication year - 2018
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.0269
Subject(s) - emtp , transient (computer programming) , electric power transmission , coupling (piping) , time domain , filter (signal processing) , waveform , computer science , fault (geology) , transmission (telecommunications) , electronic engineering , voltage , energy (signal processing) , phase (matter) , engineering , electrical engineering , physics , telecommunications , electric power system , geology , mechanical engineering , power (physics) , quantum mechanics , seismology , computer vision , operating system
Ultra‐high‐voltage (UHV) transmission lines have a higher requirement for selecting faulted phases fast and reliably. The coupling relationship between the three phases is analysed in detail. On the basis of the coupling relationship, the principle of faulted phase selection (FPS) is proposed, which utilises the time‐domain energy of three‐phase transient currents. To remove high‐frequency noise and preserve the transient current waveform features invariant, a morphological filter with flat structure element is applied in FPS algorithm. The simulation model of Jindongnan–Nanyang–Jingmen UHV transmission project is established in EMTP. The testing results show that the proposed algorithm is feasible and fast (<2 ms) in case of various fault conditions.