Abstract
The rise of renewable energy sources being attached to the distribution side of power systems is changing the way old radial protection schemes work. The purpose of this paper is to explore how Distributed Generation (DG) can change the timing operation of a system relay and how much the DG can change current magnitudes. These protection concerns are looked at and analyzed with the use of Power System Computer Aided Design (PSCAD) simulation to test a 24.9 kV, 34-bus feeder that is being supplied by a single source acting as a substation. Some results are presented and further research needs are acknowledged.