Bacteria Foraging and Differential Evolution Based Hybrid Algorithm for Coordination of Directional Overcurrent Relay in Different Network Topologies

Shuma Adhikari, Subir Datta and Nidul Sinha

Now-a-days, various operating conditions and occurring system contingencies of the electric system changes network topology. These lead to operate the protective system without selectivity. Thus, proper settings of overcurrent relay are required for an effective coordination in an interconnected system. The coordination of overcurrent relays is highly nonlinear and it suffers from nonconvex problem as well. Therefore, in this paper, a hybridization algorithm, based on Differential Evolution (DE) and Bacteria Foraging (BF) techniques, has been proposed for solving the problem of finding the optimal setting of directional over-current relay (DOCR). In this study, coordination of fixed and variable network topologies is considered for studying the effectiveness of the proposed algorithm at the near end fault of the system. This algorithm based directional over-current relay is used on IEEE 8-bus system to obtain the performance of the system. Results show that the system performance obtained using hybrid BF-DE algorithm is much better than that of using algorithm of BF and DE separately in terms of convergence rate and solution quality.

Volume 11 | 09-Special Issue

Pages: 1133-1142

DOI: 10.5373/JARDCS/V11/20192682