Coordination of overcurrent relays in the smart distribution system

Mohammadreza Mohammadiyan¹

1) 1Department of Electrical Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran

IOI Code : XBKC-ECHZH
Publication : International Conference on Engineering & Technology - Norway (icetconf.com)
Abstract :
    This paper provides a review of the overcurrent relays coordination in the smart distribution networks. Distribution feeders have a simple protection system that usually uses overcurrent relays. In the smart grid, a number of distributed generation sources (DGs) are connected to the distribution feeder, which the feeders change from a single source system to a complex multi-source system, which causes a lack of main coordination between the feeder protection devices. The performance of DG units can cause loss of protection. The fault current generated by DG units may change the current measured by the feeder relay.

Keywords : overcurrent relays coordination smart distribution systems distribution generation distribution systems protection protection scheme