Open AccessAdaptive fast protection technique for uncompensated/compensated double‐circuit transmission lines connected to large‐scale wind farms
Author(s) -
Saber Ahmed
Publication year - 2020
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/iet-rpg.2019.1288
Subject(s) - electric power transmission , scale (ratio) , computer science , transmission (telecommunications) , control theory (sociology) , electronic engineering , electrical engineering , telecommunications , physics , engineering , artificial intelligence , control (management) , quantum mechanics
The penetration of large‐scale offshore wind farms in power grids has a negative effect on the operation of the conventional distance relays. In this study, a new protection technique is presented for uncompensated/compensated double‐circuit transmission lines utilising one‐end current measurements. The proposed protection technique does not require any information regarding the transmission line parameters, wind farms, or the compensation devices. In addition, the errors in phasor estimation due to the generated sub‐harmonics and inter‐harmonics by the wind generators are avoided as the current samples are directly used. Comprehensive studies are implemented on PSCAD/EMTDC software considering numerous cases of external and internal faults. In addition, the double‐circuit transmission line is modelled using the frequency‐dependent phase model and the mutual‐coupling between both circuits are considered. The recorded results confirm the high efficacy of the proposed protection technique with respect to fault type, fault location, and fault resistance.