Abstract:
The correct identification of the fault in the distribution systems can help in the healing process, system restoration,
and thus lessen the duration of the outage. With the latest trend of
penetrating the DG with the distribution network, the conventional
fault identification (FI) methods become inappropriate for the
promising active distribution network. Hence, the FI methods in
the multisource, unbalanced, and weak distribution system is a
challenge. In this article, the entire network is divided into the
number of zones with each phase representing the two-port network. Further, the adjoint network matrices are formed for each
of the two-port networks. The Tellegen’s theorem based on adjoint
circuit concept is then, used to identify the open-circuit section or
the faulted node in the network using the input and output port
information only. The voltage and current phasor information of
the ports are acquired from the phasor measurement units based
on the DFT. The methodology has been extensively verified on the
IEEE-13 and IEEE-34 bus distribution systems integrated with
the DGs, for all types of open and short circuit faults, with very
encouraging results, with the real-time digital simulator.
