Publications

Recent publications including NPPT authors:

1. M. Ropp, A. Ellis, "Guidelines Document for Helping Utility Protection Engineers Determine when Additional Anti-Islanding Studies Are Prudent", Proceedings of the 38th IEEE Photovoltaic Specialists Conference, June 2012, 5 pgs.
2. M. Ropp, S. Perlenfein, D. Joshi, C. Mettler, M. Mills-Price, M. Scharf, K. Gubba Ravikumar, G. Zweigle, "Synchrophasors for Island Detection", Proceedings of the 38th IEEE Photovoltaic Specialists Conference, June 2012, 6 pgs.
3. M. Ropp, D. Schutz, S. Cozine, “Temporary Overvoltage Issues in Distribution-Connected Photovoltaic Systems and Mitigation Strategies”, Proceedings of the 47th Minnesota Power Systems Conference, November 1-3 2011, 10 pgs, http://www.cce.umn.edu/Documents/CPE-Conferences/MIPSYCON-Papers/2011/TemporaryOvervoltageIssuesInDistrubutionConnectedPhotovoltaicSystemsAndMitigationStrategies.pdf.
4. D. Schutz, M. Ropp, “Simulation and Experimental Study of Multi-Inverter Islanding”, Proceedings of the IEEE Power and Energy Society General Meeting, July 2011, 4 pgs.
5. M. Ropp, R. Reedy, K. Davis, D. Click, A. Shaffer, “New Field Results for Power Line Carrier-Based Islanding Detection and an Updated Strengths and Weaknesses Discussion”, Proceedings of the 37th IEEE Photovoltaic Specialists Conference, June 2011, 4 pgs.
6. M. Ropp, J. Cale, M. Mills-Price, M. Scharf, S. Hummel, “A Test Protocol to Enable Comparative Evaluation of Maximum Power Point Trackers Under Both Static and Dynamic Irradiance”, Proceedings of the 37th IEEE Photovoltaic Specialists Conference, June 2011, 4 pgs.
7. S. Gonzalez, M. Ropp, A. Fresquez, M. Montoya, N. Opell, “Multi-PV Inverter Utility Interconnection Evaluations”, Proceedings of the 37th IEEE Photovoltaic Specialists Conference, June 2011, 4 pgs.
8. R. Reedy, K. Davis, D. Click, M. Ropp, A. Shaffer, “Power Line Carrier Permissive as a Simple and Safe Method of Enabling Inverter Ride-Through Operation of Distributed Grid-Tied Photovoltaic Systems”, Proceedings of the 15th IEEE International Symposium on Power Line Communications (IEEE ISPLC), April 2011, 4 pgs.
9. M. Mills-Price, M. Scharf, S. Hummel, M. Ropp, D. Joshi, G. Zweigle, K. G. Ravikumar, B. Flerchinger, “Solar Generation Control with Time-Synchronized Phasors”, IEEE Western Protective Relaying Conference (IEEE WPRC), October 2010, 8 pgs.
10. M. Ropp, B. Enayati, J. Cleary, “High penetration and anti-islanding analysis of multiple single-phase inverters in an apartment complex”, IEEE Conference on Innovative Technologies for an Efficient and Reliable Electricity Supply (CITERES), September 2010, 8 pgs.
11. M. Ropp, “Similarities between vehicle-to-grid interfaces and photovoltaic systems”, Proceedings of the 2009 IEEE Vehicular Power and Propulsion Conference (VPPC), September 2009, p. 1221-1225.
12. M. Ropp, S. Gonzalez, “Development of a MATLAB/Simulink model of a single-phase grid-connected photovoltaic inverter”, IEEE Transactions on Energy Conversion 24(1) March 2009, p. 195-202.
13. R. Bhandari, M. Ropp, S. Gonzalez, “Investigation of two anti-islanding methods in the multi-inverter case”, Proceedings of the IEEE Power Engineering Society 2008 Summer Meeting, July 2008, 6 pgs.
14. M. Ropp, J. Newmiller, C. Whitaker, B. Norris, “Review of Potential Problems and Utility Concerns Arising from High Penetration Levels of Photovoltaics in Distribution Systems”, invited presentation/paper at the 2008 IEEE Photovoltaics Specialists Conference, May 2008, 6 pgs.
15. P. Vangala, M. Ropp, K. Haggerty, K. Lynn, W. Wilson, “Field Measurements of Lighting-Induced Voltage Transients in PV Arrays”, Proceedings of the 2008 IEEE Photovoltaics Specialists Conference, May 2008, 4 pgs.
16. P. Vangala, M. Ropp, K. Haggerty, K. Lynn, W. Wilson, “Observed Voltage Spikes on Fielded Photovoltaic Arrays Caused by Startup and Shutdown Switching of Inverters”, Proceedings of the 2008 IEEE Photovoltaics Specialists Conference, May 2008, 4 pgs.
17. R. Bhandari, M. Ropp, “Discussion of the Behavior of the Classical Linear Instability Method of Islanding Prevention as a Function of Load Quality Factor”, Proceedings of the 2008 IEEE Photovoltaics Specialists Conference, May 2008, 4 pgs.

Commissioned reports and papers:

1. M. Ropp, A. Ellis, “Suggested Guidelines for Anti-Islanding Screening”, Sandia National Laboratories report SAND2012-1365, published February 2012.
2. C. Whitaker, J. Newmiller, M. Ropp, B. Norris, “Distributed Photovoltaic Systems Design and Technology Requirements”, Report #2 from the Department of Energy’s 2008 Renewable Systems Interconnection Study, SAND2008-0946, available online at: http://www1.eere.energy.gov/solar/pdfs/distributed_pv_system_design.pdf
3. C. Whitaker, J. Newmiller, M. Ropp, B. Norris, “Test and Demonstration Program Definition”, Report #11 from the Department of Energy’s 2008 Renewable Systems Interconnection Study, SAND2008-0948, available online at:
   http://www1.eere.energy.gov/solar/pdfs/test_demonstration_program.pdf