and overcurrent relays (D&DOCRs), operating times of the second zone of distance relays (TZ2) are typically increased in order to satisfy the selectivity constraints. In this paper,

a new operating characteristic (OPC)for distance...

A power swing may cause unwanted tripping of the distance protection. The power swing blocking is a function commonly

used to prevent the distance protection from operating during power swing. When a distance relay is blocked, it cannot react...

Protection of power transmission has an important role in power systems. To have a better protection it is common to

combine difference types of relays, which combination of overcurrent and distance relays is a well-known protection scheme in...

Increasing the power transfer capability and

efficient utilization of available transmission

lines, improving the power system

controllability and stability, power oscillation

damping and voltage ...

are defined

based on the fault at the end of the transmissi

on lines, rather than those at the end of the

first zone of the primary distance relay. To solve this nonlinear optimization problem, a

combination of Genetic Algorithm...

Most studies in relay coordination have focused solely on coordination of overcurrent relays while distance relays are used as the main protection of transmission lines. Since, simultaneous coordination of these two types of relays can provide a...