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Abstract
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In this paper, a new time-domain-based method
is proposed for fault location in HVDC transmission lines.
In the proposed method, an equation is derived for locating
the fault for different transmission-line models (lumped-line
model, ?-line model, and distributed-line model). Then, a
method is suggested to precisely determine the transmissionline
resistance using DC component of voltage and current
at the both terminals (pre-fault). The performance of the proposed
method is evaluated based on a test system by the
PSCAD/EMTDC and MATLAB software. The performance
and precision of the proposed methods are evaluated for
short-circuit fault in different conditions, such as different
fault resistances, difference fault distances, different minimum
injected current of the inverter during the fault, and
different pre-fault conditions. The simulation results confirm
that the proposed method is much more accurate in locating
faults compared to other counterparts.
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