In this paper, a protection system adopting a MultiAgent concept for the distribution systems is proposed. An overcurrent relay(OCR) is developed as an agent by adding its own intelligence, self-tuning and communication ability. The proposed OCR agent is able to detect a fault or a change in the network in an autonomous manner and changes its operating parameters adapting to the new operation c...

The principle is shown for lightning protection of power distribution lines taking the effects of surge arresters, overhead ground wires and their combined use into consideration. Moreover an outline of a rational design method targeting direct lightning hits, induced overvoltages and backflow currents from high structures.

Nowadays research and development of power networks towards a new, more intelligent and self-management infrastructure is a topic of great interest, becoming what is known as Smart Grids. In order to achieve all this, programming tools to deal with large volumes of information are required, to model and simulate these future networks. This paper presents a tool that allows to model distribution...

Today, with attention to increase in sensitive electrical equipments application in distribution networks and their susceptibility to the power quality deficiencies, the protection necessity of sensitive loads against undesirable effects of these disturbances are in focus. So, in this paper voltage sag deficiency and Dynamic Voltage Restorer (DVR) would be introduced as the most prevalent power...

The goal of this paper is to propose a performance assessment for normally closed-loop type distribution power systems. Pilot relaying systems have been successfully applied to the protection scheme for normally closed-loop distribution systems in the Taiwan Power Company (Taipower). This paper demonstrates that the proposed protection scheme is extremely well designed, such that both the numbe...

The increasing penetration of dispersed generation (DG) brings challenges to conventional protection approaches of distribution system, mainly due to bi-directional power flow and variable fault current contribution from different generation technology-based DG units. Moreover, the trend of allowing islanded operation of distribution systems necessitates the adoption of adaptive protection meth...