-Impact of the compensation devices on relay protection is an important issue affecting secure operation of transmission systems. Currently, solutions for this problem are widely demonstrated in literature and in practice. At the same time, application of these devices in distribution systems is increasing due to their ability to improve power quality. Nevertheless, less attention has been paid...

The goal of this review paper will be to address complex optimization functions in the area overcurrent relay optimization, inspect and valorize their objectives critically examine application real distribution networks. Special emphasis put on observing discrimination time between primary backup pairs, methods which prevent latter becoming penalty shown. Furthermore, impact distributed generat...

In electrical power systems, directional overcurrent relay (DOCR) coordination is assumed to be an essential component of the system for protection purposes. To diminish and reduce losses, between these relays ought kept at ideal value minimalize overall operating time all primary-relay shortcoming situations. The DOCR a complex profoundly compelling nonlinear problem. objective function total ...

Protection of radial distribution networks is widely based on coordinated inverse time overcurrent relays (OCRs) ensuring both effectiveness and selectivity. However, the integration of distributed generation (DG) into an existing distribution network not only inevitably increases fault current levels to levels that may exceed the OCR ratings, but it may also disturb the original overcurrent re...

In the paper a novel approach to overcurrent protection stabilisation based on Fuzzy Logic technique is presented. The scheme is intended for MV overhead lines for which the autoreclosure function is applied to enhance reliability of supply in case of intermediate (vanishing) faults. Protection stabilisation is required for the feeders supplying a part of network with numerous loaded MV/LV tran...

259 Lines are protected by overcurrent-, distance-, or pilot-relaying equipment, depending on the requirements. Overcurrent relaying is the simplest and cheapest, the most difficult to apply, and the quickest to need readjustment or even replacement as a system changes. It is generally used for phaseand ground-fault protection on station-service and distribution circuits in electric utility and...

Directional and non directional overcurrent protection are well established methods of providing either primary or backup protection on distribution networks. Compared to unit protection which only protects a specific piece of equipment, such as a transformer or feeder, overcurrent protection has the advantage of being able to provide protection to large sections of network. To do this the over...