Sandia Energy > Programs > Electric Grid > Renewable Energy and Distributed Systems Integration > Key Personnel > Sigifredo Gonzalez Sigifredo Gonzalez Senior Member of Technical Staff Contact InformationSigifredo Gonzalez / 505-845-8942BiographySigifredo Gonzalez is a principal member of the technical staff at Sandia National Laboratories, and works in the area of utility interconnection standards and grid integration. He currently a working group member of IEEE 1547 full revision and a chair for the revision to IEEE 1547.1 section 5.7 Unintentional Islanding test procedure. Concentrating efforts include laboratory evaluations of electrical power system support function developments in prototype inverters, PV system performance assessments, PV system NEC code compliance and reliability, and PV system interoperability assessments for communication implementation of advanced inverter functions. Sigifredo directs laboratory assessments of PV inverter at the distributed energy technologies laboratory (DETL) at Sandia. He has a master’s degree in electrical engineering from New Mexico State University in Las Cruces, New Mexico. IEEE Xplore:Sigifredo GonzalezKey Publications2019 Nicholas Sonny Gurule, Javier Hernandez-Alvidrez, Matthew J. Reno, Adam Summers, Sigifredo Gonzalez, “Grid-forming Inverter Experimental Testing of Fault Current Contributions,”IEEE, 2019.2018 Sigifredo Gonzalez, Nicholas Gurule, Matthew J. Reno, Jay Johnson,“Fault Current Experimental Results of Photovoltaic Inverters Operating with Grid-Support Functionality,” IEEE, 2017.