This article provides a comprehensive review of optimal relay coordination (ORC) in
distribution networks (DNs) that include distributed generators (DGs). The integration of DGs …

The time of operation of overcurrent relays (OCRs) can be reduced, and at the same time,
the coordination can be maintained, by selecting the optimum values of time multiplier …

The coordinated or selective power system can be considered as a sequence procedure
among two protective devices installed in series and having certain features. The …

The directional overcurrent relays (DOCRs) coordination problem is usually studied based
on a fixed network topology in an interconnected power system, and is formulated as an …

Optimal coordination of directional overcurrent relays (DOCRs) is a highly constrained and
nonlinear optimization problem. The operating time of each relay depends on two …

Nowadays, distributed generations (DGs) and microgrids play a significant role in
development of power systems, but DGs produce several protection problems especially in …

For optimal co-ordination of overcurrent relays, linear programming techniques such as
simplex, two-phase simplex and dual simplex are used. Another way of optimal coordination …

In real power systems, the network topology is subjected to uncertainty due to single-line
outage contingencies, maintenance activities, and network reconfigurations. These changes …

Considerations of weight factors and far-end faults in the directional overcurrent relay
coordination problem formulation do not affect the optimal solution. This paper investigates …

A new objective function (OF) has been proposed for mathematical formulation of directional
overcurrent (OC) relay coordination in interconnected networks. The fuzzy-based genetic …