Recloser-fuse Coordination of Radial Distribution Systems with Different Technologies of Distributed Generation

Abstract

This paper discusses the effects of distribution generation (DG) on the recloser-fuse coordination of radial distribution systems. These effects are considered one of the disadvantages of connecting DGs with distribution systems and depend on the technology, location and size of DGs. Three different locations of DGs are studied: firstly, when the DG is located between the recloser and fuse, secondly, when the DG is located upstream of recloser and fuse, and thirdly, when the DG is located downstream of recloser and fuse. In every location the technology and size of the DG is varied and the penetration level at which the coordination is lost is recorded. The different studied technologies of the DGs are photovoltaic (PV), wind turbine of squirrel cage induction generator (Type 1) and wind turbine of synchronous generator (Type 4). The studied system is a radial distribution system consisting of 14 buses with main feeder and two laterals. All simulations are performed using ETAP 12.6.0 package. The results show that the recloser-fuse coordination may be lost as the size of DG increases, the worst location is when the DG is connected downstream to the recloser and fuse, and the worst DG technology is the Type 4 wind turbine.