Features of implementing multi-parameter islanding protection in power districts with distributed generation units

Abstract

Reliability of electric power supply of industrial consumers owning distributed generation sources (DG) can be improved by implementing multi-parameter islanding systems (MIS) in case of faults in the adjacent power system. The paper outlines possible limitations of MIS application, which are related to the features of active power control and relay protection settings of generation units (GU). The paper addresses specific features of power system operation modes characterized by frequency and voltage drops. It is proved that load parameters exert significant influence on power system operation mode calculation and determine the feasibility of control actions defined by MIS algorithms and settings. Detailed analysis of MIS performance efficiency is presented.