TITLE:
Fault current Characterization Based on Fuzzy Algorithm for DOCR Application
AUTHORS:
Luly Susilo, J. C. Gu, S. K. Huang
KEYWORDS:
Fault Current Characterization; Fuzzy Logic Algorithm; DOCR; Distributed Generation
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
12,
2013
ABSTRACT: Penetration of distribution generation (DG) into power system
might disturb the existing fault diagnosis system. The detection of fault,
fault classification, and random changes of direction of fault current cannot
always be monitored and determined via on-line by conventional fault diagnosis
system due to DG penetration. In this paper, a fault current characterization
which based on fuzzy logic algorithm (FLA) is proposed. Fault detection, fault
classification, and fault current direction are extracted after processing the
measurement result of three-phase line current. The ability of fault current characterization
based on FLA is reflected in directional overcurrent relay (DOCR) model. The
proposed DOCR model has been validated in microgrid test system simulation in
Matlab environment. The simulation result showed accurate result for different
fault location and type. The proposed DOCR model can operate as common
protection device (PD) unit as well as unit to improve the effectiveness of
existing fault diagnosis system when DG is present.