Understanding Fault Technical Report

Technical Report NREL/TP-550-46698 January 2010 Understanding Fault Characteristics of Inverter-Based Distributed Energy Resources J. Keller and B. Kroposki National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 NREL is a national laboratory of the Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36- 08-GO28308 Technical Report NREL/TP-550-46698 January 2010 Understanding Fault Characteristics of Inverter-Based Distributed Energy Resources J. Keller and B. Kroposki Prepared under Task No. NOTICE This Report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

protective relay. This information is processed by the protective relay and reacts to any abnormal conditions detected. Each protective relay needs to be set or programmed for the desired tripping time (i.e., time delay for relay coordination and system reliability purposes).

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