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Abstract
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Power distribution networks (PDNs) has played a
crucial role in expediting transition towards cleaner and better
distributed energy sources. Nowadays, more and more
distributed generations (DGs) are used in PDNs which
complicates the automatic fault location. This paper presents an
accurate impedance-based method to determine the fault location
for smart PDN in the presence of DGs. In addition, phase domain
equations of distributed line parameters are used to enhance the
accuracy of fault location. Two types of networks are considered.
The first type of network is assumed to be fully observable with
???????? and in the second type there are only a few ????????s with
data loggers on the rest nodes. Load impedances of all nodes are
estimated using pre-fault recorded information by present
????????s and data loggers. The proposed algorithm might suggest
several points as possible fault locations for a PDN. To find out
the actual location of fault same fault type is simulated for all
suggested points. A matching value which is mathematically
defined in the paper, is calculated using recorded and simulated
voltage to determine the actual fault point among all the
suggested candidates. The accuracy of suggested method is
analyzed against various conditions.
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