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A New Fault Identification Method for HVDC Transmission Line

open access: yesInternational Journal of Science and Research (IJSR), 2015
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Telephone interference criteria for HVDC transmission lines

IEEE Transactions on Power Delivery, 1989
The telephone interference caused by a transmission line is primarily characterized by the equivalent line disturbance current defined as: le=?n (Cn ยท In)2 where Cn = C-message weighting factor for the n:th harmonic ln = residual line current of n:th harmonic For many HVdc lines, particularly in North America, this current has been required to be < 270
Arne V. Johansson, Ake Ekstrom
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