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 …

An adaptive current protection scheme is proposed for the protection of power systems with
penetration of distributed generation (DG). In this scheme, steady state fault current of the …

In this paper, a novel problem formulation for optimal coordination between distance relays
and Directional Over-Current Relays (DOCRs) in series compensated systems is proposed …

This paper presents a novel method to optimize the settings of the resistive and reactive
reaches of the zones of the distance relays. The method considers the probabilistic behavior …

This paper presents transmission system distance relaying co-ordination using detailed
simulation studies of the apparent impedance loci as seen from the relaying location …

The reliable operation of protection systems depends on the correct settings of protective
devices. The complexity of power networks and the large number of protection setting …

In this paper a new method is presented for setting the quadrilateral characteristic of
distance relay, considering sensitivity and selectivity criteria for protection zones. The main …

Quadrilateral characteristics of distance relays are widely used in modern power systems
because of its lesser sensitivity to the variation in operating scenarios and fault parameters …

The work presented in this chapter addresses the problems encountered by the
conventional digital distance relay used for the protection of transmission lines fed from one …

This paper presents a technique that increases the second-zone coverage of distance relays
without causing overreach problems. The technique is based on the impedance seen by …