Minimizing Distributed Generation Impacts on Protection Systems using Fault Current Limiters Experimentally

Abstract

The use of distributed generation (DG) with the medium voltage networks a multifaceted modern used these days in the electric power networks of multiple advantages in providing electrical energy and increase energy reserves for the network as a whole. The industrial and commercial electrical power sources as sources of backup in case of an interruption of the main energy sources from the public network. Recent studies have emerged about the possibility of interconnecting this with the electric power network and the extent of protection difficulties when interconnecting those DGs and how to overcome them. For this target, a typical 11 kV underground distribution feeder is modeled while a considerable DG unit is inserted. An experimental work is done to verify the proposed relay setting and to evaluate the FCL performance. Using Digital Signal Processing (DSP) board, overcurrent inverse characteristic is implemented experimentally. A scale down of the distribution network is designed and implemented in the laboratory