Open AccessResearch on a new scheme of LCC‐HVDC line protection
Author(s) -
Song Guobing,
Gu Yaobin,
Huang X.H.,
Wang Ting,
Huang W.
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0514
Subject(s) - scheme (mathematics) , line (geometry) , transmission line , fault (geology) , reliability (semiconductor) , blocking (statistics) , computer science , electric power transmission , reliability engineering , transmission (telecommunications) , electrical engineering , process (computing) , electronic engineering , telecommunications , engineering , mathematics , computer network , power (physics) , physics , mathematical analysis , geometry , quantum mechanics , seismology , geology , operating system
High‐performance protection scheme of the transmission line is very important for the safe and reliable operation of line commutated converter‐based high‐voltage direct current (HVDC) system. The transmission line protection scheme applied in existing projects is lack of reliability, rapidity and incomplete in theory. Due to the disadvantages of current dc protection scheme, bipolar blocking accidents have happened frequently. In order to overcome this defect and improve the protection performance, four kinds of new dc line protection principles are put forward and selected to form a new scheme. This new dc line protection scheme can avoid the influence of long‐distance distribution parameters and cover the entire process of fault with a lower sampling rate. In addition, the problem of high‐resistance ground faults can also be identified sensitively. Theoretical analysis and simulation results prove the effectiveness and superiority of this new HVDC transmission line protection scheme.