Sandia Energy > Programs > Electric Grid > Advanced Grid Modeling > Key Personnel > Ronald C. Matthews Jr. Ph.D. Ronald C. Matthews Jr. Ph.D. Senior Member of Technical Staff Contact InformationRonald C. Matthews Jr. / 505-845-7608BiographyRonald C. Matthews received his B.S. in Mathematics and M.S. in Mathematical Sciences from the University of West Florida in 2005 and 2007 respectively. He earned his M.S. and Ph.D. in Electrical Engineering from Michigan Technological University in 2012 and 2018 respectively. He joined Sandia National Laboratories in 2018 as a Postdoctoral Appointee and transitioned to R&D S&E, Electrical Engineer in 2020. His current work focuses on grid/microgrid protection, optimization, real-time modeling of microgrids, and controls.Education Ph.D., Electrical Engineering, Michigan Technological University, 2018 MS, Electrical Engineering, Michigan Technological University, 2012 MS, Mathematical Sciences, University of West Florida, 2007BS, Mathematics, University of West Florida, 2005U.S. PatentsWilson, D.G, Weaver, W.W., Robinett III, R. D., Matthews, R., Glover, S.F., “Unstable Controller Design of DC Microgrids”, SD#12857, Non-Provisional Patent Application, January 11th, 2018, Patent Pending August 2018. Google Scholar:Ronald C. Matthews Jr.Key Publications2019 C. Matthews, M. J. Reno and A. K. Summers, “A graph theory method for identification of a minimum breakpoint set for directional relay coordination,” MDPI Electronics, vol. 8, no. 12, 2019. C. Matthews, S. Hossain-McKenzie and M. G. Reno, “Fault current correction strategies for effective fault location in inverter-based systems,” in IEEE Photovoltaic Specialist Conference (PVSC 46), Chicago, 2019.2018 C. Matthews, “Power flow control in hybrid ac/dc microgrids,” Michigan Technological University, Houghton, 2018. C. Matthews, W. W. Weaver, R. D. Robinett III and D. G. Wilson, “Hamiltonian methods of modeling and control of ac microgrids with spinning machines and inverters,” International Journal of Electrical Power & Energy Systems, vol. 98, pp. 315-322, 2018.