Operational and Design Considerations for Electric Distribution Systems with Dispersed Storage and Generation (DSG)

Three studies have examined the operational and planning problems associated with connecting small power sources to an electric distribution system. In one study [ 6], the harmonic distortion produced by a subdivision of PV arrays connected through line-commutated inverters was simulated. A second study [1,2,3] exami ned the protection and safety problems associated with the operation of small ac generators and dc-to-ac inverters. A third study [11] assessed the the effects of dispersed sources on distribution planning and design. The purpose of the studies was to determine the adequacy of the electric utility industryl traditional practices, hardware, and design for the operation of dispersed power sources on electric distribution systems. The purpose of this paper is to summarize the important results of these studies and related studies, give recommendations for accommodating this new technology, and identify areas needing further research.