Northern Plains Power Technologies | Publications
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Publications

Relevant journal publications

  1. Ropp, A. Hoke, S. Chakraborty, D. Schutz, C. Mouw, A. Nelson, T. Wang, J. Chebahtah, M. McCarty, “Ground Fault Overvoltage with Inverter-Interfaced Distributed Energy Resources”, IEEE Transactions on Power Delivery, special issue “Contemporary Problems in Power Quality”, 32 (2), April 2017, p. 890-899.
  2. 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.
  3. Hohm, M. Ropp, “Comparative Study of Maximum Power Point Tracking Algorithms”, Progress in Photovoltaics vol. 11 January 2003, p. 47-62.
  4. E. Ropp, M. Begovic, A. Rohatgi, G. A. Kern, R. Bonn, S. Gonzalez, “Determining the Relative Effectiveness of Islanding Prevention Techniques Using Phase Criteria and Nondetection Zones”, IEEE Transactions on Energy Conversion 15(3) September 2000, p. 290-296. Received IEEE PES Prize Paper Award.
  5. E. Ropp, M. Begovic, A. Rohatgi, “Prevention of Islanding in Grid-Connected Photovoltaic Systems”, Progress in Photovoltaics vol. 7 (1999), p. 39-59.
  6. Ropp, M. Begovic, A. Rohatgi, “Analysis and Performance Assessment of the Active Frequency Drift Method of Islanding Prevention”, IEEE Transactions on Energy Conversion 14 (3), September 1999, p. 810-816.
  7. E. Ropp, M. Begovic, A. Rohatgi, R. Long, “Design Considerations for Large Roof‑Integrated Photovoltaic Arrays”, Progress in Photovoltaics  v. 5 p. 55‑67, January/February 1997.

Recent relevant conference publications (past 5 years)

  1. Perlenfein, Y. Cui, M. Ropp, “Islanding and Single Phase Open Detection Effectiveness of a Subharmonic PLCP Based Island Detection System”, Proceedings of the 7th World Photovoltaic Energy Conversion Conference (WCPEC-7), June 2018, 5 pgs.
  2. Ropp, M. Kahrobaee, Y. Cui, D. Schutz, C. Mouw, “On the Sizing and Benefits of Grounding Transformers with Distribution-Connected Inverters”, accepted for publication in the Proceedings of the IEEE Transmission and Distribution Conference and Exposition, April 2018, 5 pgs.
  3. Ropp, D. Schutz, C. Mouw, M. Kahrobaee, “Voltage Changes Caused by Distributed Energy Resources and Their Impact on Hosting Capacities”, 53rd Minnesota Power Systems Conference, November 2017, 10 pgs.
  4. Ropp, D. Schutz, S. Perlenfein, C. Mouw, “Single Line Open Detection in the Presence of Distributed Energy Resources”, Western Protective Relay Conference, October 2017, 9 pgs.
  5. Kern, M. Ropp, S. Gonzalez, “Power Balance Requirements for Sustained Islanding of Inverter Based Distributed Generation”, proceedings of the 44th IEEE Photovoltaics Specialists Conference, July 2017.
  6. Gonzalez, G. Kern, M. Ropp, “Loss of Utility Detection Capabilities for Today’s Utility Interconnected Photovoltaic Inverters”, proceedings of the 44th IEEE Photovoltaics Specialists Conference, July 2017.
  7. Ropp, D. Schutz, S. Perlenfein, C. Mouw, A. Sorenson, “Detailed Simulation Studies as a Solution to 21st Century Power System Challenges”, 52nd Annual Minnesota Power Systems Conference, November 2016.
  8. Ropp, C. Mouw, “Negative Sequence Relaying and Islanding Detection in Inverter-Based Distributed Energy Resources”, Proceedings of the 2016 Western Protective Relay Conference, October 2016.
  9. Ropp, D. Schutz, J. Neely, S. Gonzalez, “Effect of Grid Support Functions and VRT/FRT Capability on Autonomous Anti-Islanding Schemes in Photovoltaic Converters”, Proceedings of the 43rd IEEE Photovoltaics Specialists Conference, June 2016, 4 pgs.
  10. Ropp, C. Mouw, D. Schutz, S. Perlenfein, “Risk of Unintentional Islanding in the Presence of Multiple Inverters or Mixed Generation Types”, 51st annual Minnesota Power Systems Conference, November 11, 2015.
  11. Ropp, D. Schutz, S. Perlenfein, C. Mouw, “Lessons Learned in Implementing Battery System Controls in Low-Inertia Systems”, 51st annual Minnesota Power Systems Conference, November 11, 2015.
  12. Nelson, A. Hoke, S. Chakraborty, J. Chebahtah, T. Wang, B. Zimmerly, M. Ropp, “Experimental Evaluation of Load Rejection Overvoltage from Grid-Tied Solar Inverters”, Proceedings of the 42nd IEEE Photovoltaic Specialists Conference, June 2015.
  13. Ropp, S. Perlenfein, D. Schutz, C. Mouw, S. Gonzalez, J. Neely, M. Mills-Price, “Practical Considerations in Application of Correlation-Based Islanding Detection with Synchrophasors”, Proceedings of the 42nd IEEE Photovoltaic Specialists Conference, June 2015.
  14. Perlenfein, M. Ropp, J. Neely, S. Gonzalez, L. Rashkin, “Subharmonic Power Line Carrier Based Island Detection”, Proceedings of the 2015 IEEE Applied Power Electronics Conference (APEC), March 2015, 6 pgs.
  15. Mouw, M. Ropp, W. Wingen, “Simulation Study of a Dynamic VAr Compensator as a Solution to a Large Motor Start Problem”, 50th Annual Minnesota Power Systems Conference (MiPSyCon), November 2014, 10 pgs.
  16. Mouw, M. Ropp, B. Enayati, R. Eastham, B. Fedele, “Simulation Study of Islanding in Two Synchronous Generator DG Applications”, Proceedings of the IEEE PES General Meeting, July 2014, 5 pgs.
  17. Schutz, M. Ropp, K. Whitener, M. Osborn, “Simulation of and Controls Design for a Whole-Feeder Microgrid”, Proceedings of the IEEE PES General Meeting, July 2014, 5 pgs.
  18. Ropp, P. Banschbach, C. Mouw, C. Mettler, B. Enayati, “Application of Pulse-Based Power Line Carrier Permissive (PLCP) in Distribution System”, Proceedings of the 2014 IEEE Transmission and Distribution Conference, April 2014, 6 pgs.
  19. Ellis, S. Gonzalez, M. Ropp, Y. Miyamoto, D. Schutz, T. Sato, “Comparative Analysis of Anti-Islanding Requirements and Test Procedures in the United States and Japan”, Proceedings of the 39th IEEE Photovoltaic Specialists Conference, June 2013, 4 pgs.
  20. Gonzalez, J. Stein, A. Fresquez, M. Ropp, “Performance of Utility-Interconnected Photovoltaic Inverters Operating Beyond Typical Modes of Operation”, Proceedings of the 39th IEEE Photovoltaic Specialists Conference, June 2013, 4 pgs.
  21. Ropp, D. Joshi, S. Cozine, D. Schutz, “The Future Role of Passive Methods for Detecting Unintentional Island Formation”, Proceedings of the 48th Minnesota Power Systems Conference (MiPSyCon), November 2012, 10 pgs.
  22. E. Ropp, M. Johnson, D. Schutz, S. Cozine, “Effective Grounding of Distributed Generation Inverters May Not Mitigate Transient and Temporary Overvoltage”, Proceedings of the 2012 Western Protective Relay Conference, October 2012, 8 pgs.
  23. Ropp, D. Joshi, M. Mills-Price, S. Hummel, M. Scharf, C Steeprow, M. Osborn, K. Gubba Ravikumar, G. Zweigle, “A Statistically-Based Method of Control of Distributed Photovoltaics Using Synchrophasors”, Proceedings of the 2012 IEEE Power and Energy Society General Meeting, July 2012, 7 pgs.
  24. Ropp, A. Ellis, “Guidelines Document for Helping Utility Protection Engineers Determine When Additional Anti-Islanding Studies Are Prudent”, Proceedings of the 38th IEEE Photovoltaics Specialists Conference, June 2012, p. 748-752.
  25. 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, p. 602-697.

Book chapters

  1. E. Ropp, “Solar Photovoltaics”, Encyclopedia of Energy Engineering and Technology, Taylor and Francis, June 2007, 20 pgs.
  2. E. Ropp, “Resonant DC-Link Inverters”, Handbook of Power Electronics, CRC Press, 2002, Section 5.5, p. 556-567.

Invited papers and presentations

  1. Ropp et. al., “Impact of IEEE 1547 Standard on Smart Inverters”, an IEEE PES publication produced under MOU with the U.S. DoE. Available online at http://resourcecenter.ieee-pes.org/pes/product/technical-publications/PES_TR0067_5-18.
  2. Ropp, L. Casey, “P1547 Revision, Islanding and Energy Storage”, invited tutorial session given at the 2017 IEEE Power and Energy Society General Meeting, June 2017.
  3. Ropp, “Inverter Overvoltages and Grounding”, invited presentation at the IEEE Transmission and Distribution Conference, April 2014.
  4. Ropp, “Temporary Overvoltage Issues in Distribution-Connected Photovoltaic Systems and Mitigation Strategies”, invited presentation/paper at the 47th Annual Minnesota Power Systems Conference, November 2011.
  5. 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.
  6. Ropp, “For What It’s Worth: My Advice to Young Investigators on the Preparation of an NSF-CAREER Proposal”, submitted for presentation at the 2008 IEEE Power Engineering Society summer meeting, July 2008.
  7. Ropp, “Next-Generation Photovoltaic Devices”, Proceedings of the 43rd Minnesota Power Systems Conference, November 7 2007.
  8. Ropp, “A Comparison Between Renewable Energy Technologies and Nuclear Power”, Proceedings of the 41st Annual Minnesota Power Systems Conference, November 2-5 2005, p. 260-269.
  9. Ropp, “The Argument for Green Power: Is Coal Really So Bad?”, Proceedings of the 40th Annual Minnesota Power Systems Conference, November 2-4, 2004, p. 241-249.
  10. Ropp, “Photovoltaics—the Forgotten Renewable?”, Proceedings of the 39th Annual Minnesota Power Systems Conference, November 4-6 2003, p. 21-30.
  11. Ropp, “Overcoming Barriers to Distributed Generation”, Proceedings of the 38th Annual Minnesota Power Systems Conference (MiPSyCon), November 7-9 2002, p. 239-248.
  12. Bower, M. Ropp, “Evaluation of Islanding Detection Methods for Photovoltaic Utility-Interactive Power Systems”, International Energy Agency Task V Working Group report IEA-PVPS T5-09, March 2002.

Commissioned reports and publications

Note:  all of these publications were rigorously peer-reviewed by representatives of the commissioning organization.

  1. Neely, S. Gonzalez, M. Ropp, D. Schutz, “Accelerating Development of Advanced Inverters: Evaluation of Anti-Islanding Schemes with Grid Support Functions and Preliminary Laboratory Demonstration”, Sandia National Laboratories report SAND2013-10231, November 2013.
  2. Ropp, A. Ellis, “Guidelines Document for Determining When Additional Anti-Islanding Studies Are Necessary”, Sandia National Laboratories report SAND2012-1365, 3nd ed.,February 2013.
  3. 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/solar_america/pdfs/distributed_pv_system_design.pdf.
  1. 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/solar_america/pdfs/test_demonstration_program.pdf.

  1. Bower, M. Ropp, “Evaluation of Islanding Detection Methods for Utility-Interactive Inverters in Photovoltaic Systems”, Sandia National Laboratories report SAND2002-3591, November 2002.
  2. Ropp, R. Bonn, S. Gonzalez, and C. Whitaker, “Sandia Smart Anti-Islanding Project Task II: Investigation of the Impact of Single-phase Induction Machines in Islanded Loads”, Sandia National Laboratories report SAND2002-1320, May 2002.