Kim Jin-Hyuk, Woo Jung-Wook, Kim Kyu-Ho, 2018, Analysis of Transient State of HVDC
                           Reactance Characteristics, Resistivity and Ground Impedance of Offshore Wind Farm
                           in Lightning Strike, Journal of the Korean Institute of Illuminating and Electrical
                           Installation Engineers, Vol. 32, No. 2, pp. 123-128
