TITLE:
Impact of Geomagnetically Induced Currents Secondary Event on the High-Voltage Synchronous Motors
AUTHORS:
Vera V. Vakhnina, Aleksey A. Kuvshinov
KEYWORDS:
Geomagnetically Induced Current; Step Down Substation; Power Transformer; Synchronous Motor; High Order Harmonics
JOURNAL NAME:
Engineering,
Vol.5 No.10A,
September
30,
2013
ABSTRACT: It is justified that during geomagnetic storms the high voltage synchronous engines are being impacted by high current harmonics of even sequences powered by power transformer due to geo-induced high voltage currents flowed through the windings. Equivalent circuits of step down substation and HV synchronous motors are made for making it possible to consider a saturation of power transformer magnetic system and higher current harmonics availability in stator windings. Analytic expressions for higher current harmonics and extra capacity losses calculation in stator windings are received, as well as the calculation of induction torques allowing to denote a rate of geomagnetic processes impact on synchronous engine operation at various step down substation parameters.