In Divergence There Is Strength D DISTRIBUTION-SYSTEM, INTERCONNECTED, UTILITYscale photovoltaic (PV) systems (those 500 kW to 5 MW in size) have become commonplace in many utilities' service areas since the first few systems were installed in the 2010-2011 time frame. The integration of these systems within the operating framework of the traditional utility distribution system creates many challenges. The goal of these integration efforts is the safe, reliable, and cost-effective operation of the resulting distribution system-but with the added benefit of a considerable amount of PV-based distributed generation, resulting in lower carbon emissions and compliance with state energy policies and standards. Unlike PV systems interconnected with transmission systems and their relevant integration studies, PV integration into the distribution system requires the consideration of a number of local distribution grid impacts. The range of potential impacts requires the incorporation of utility expertise across the entire distribution division of most utilities, including planning, operations, IMAGE LICENSED BY GRAPHIC STOCK By Barry Mather and Sunil Shah Digital Object Identifier 10.1109/MPE.2014.2380011 Date of publication: 24 February 2015 62 ieee power & energy magazine 1540-7977/15©2015IEEE march/april 2015