Open AccessMitigating the effects of geomagnetically induced currents in the power network
Author(s) -
Hesami Naghshbandy Ali,
Ghaderi Baayeh Arman,
Faraji Ayda
Publication year - 2020
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.2020.0055
Subject(s) - geomagnetically induced current , autotransformer , ac power , electrical engineering , transformer , resistor , electric power system , engineering , electric power transmission , voltage , ampacity , electronic engineering , computer science , power (physics) , electrical conductor , distribution transformer , geomagnetic storm , physics , earth's magnetic field , quantum mechanics , magnetic field
Geomagnetically induced currents (GICs) in long high‐voltage transmission lines cause half‐cycle saturation of transformers, malfunction of protective relays, reactive power loss, and voltage instability. This study describes the design for a GIC effects mitigation device (GEMD) that can be installed at a power system autotransformer common node connection to block the flow of GIC DC flux at the cores of the autotransformers. The devices consist of variable resistors, which are controlled by a wide‐area method based on particle swarm optimisation algorithm. The effectiveness of the proposed protective electrical devices is investigated and validated through simulation studies under many operational cases. The test results obtained from 648 cases verify the high performance of GEMD. The proposed method can mitigate the reactive power loss due to GIC in the power system with average improvements by 7.9 and 7.09% over resistive and capacitive blocking devices, respectively.