An advanced protection coordination technique for solar in-feed distribution systems

Abstract

Distributed electricity resources (DERs) are power generating sources which are installed to meet the increasing peak demand. Renewable and zilch emission characteristics are making them as a perfect choice in distribution system. But the designing of protection scheme for the fruitful operation of distribution system (DS) places a challenging task for power system engineers. As the population of the solar based electrical DERs increase in the electrical DS, the fault current contribution from these resources becomes comparatively less with the fault current from utility substation. In this research commentary, voltage and current based protection algorithm is offered which can accurately detect the fault current from solar in-feed DS. The proposed algorithm is implemented in IEEE 30 bus reference DS. The relay mis-coordination problem is solved by using differential evolution algorithm (DEA). Keywords: Distributed energy resources (DERs), Voltage based time inverse over current relay characteristics, Solar in-feed distribution systems (DS), Differential evolution algorithm (DEA)