Open AccessPhase shift compensation method for the line differential protection on UHV‐AC transmission lines
Author(s) -
Habib Md Zakaria,
Wang Jianping,
Li Youyi,
Taylor Nathaniel
Publication year - 2018
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.0155
Subject(s) - line (geometry) , compensation (psychology) , transmission line , differential (mechanical device) , electric power transmission , sensitivity (control systems) , current (fluid) , voltage , transmission (telecommunications) , electrical engineering , materials science , electronic engineering , physics , engineering , mathematics , psychology , geometry , psychoanalysis , thermodynamics
Line differential protection is popular for its good selectivity and simplicity as long as there is a dependable communication system between the two ends of the line. However, the sensitivity needs to be compromised when the traditional line differential scheme is applied for ultra‐high voltage (UHV)‐alternating current lines because of the large charging current. A study of the impact of the UHV transmission line characteristics on line differential protection and a proposed solution based on the compensation of the phase shift that exists between the sending and receiving end currents are presented.