B. Daryanian, H. Elahi, E. LaRose, R. Walling; Trends for the Grid of the Future; Cigre U.S. National Committee Grid of the Future Symposium, Kansas City, Oct. 2012
Y. Pan, W. Ren, S. Ray, R. Walling, M. Reichard, Impact of Inverter Interfaced Distributed Generation on Overcurrent Protection in Distribution Systems; IEEE 2012 Power Engineering and Automation Conference, Wuhan, China, Sept. 2012.
M. Shao, R. Walling, J. Cleary, Steady-State Methodology for Investigating the Relationship between Photovoltaic (PV) Facility Size, Location, and Voltage Impact, IEEE PES General Meeting, 2012.
A. Ellis, R. Nelson, E. Von Engeln, R. Walling, J. MacDowell, L. Casey, E. Seymour, W. Peter, C. Barker, B. Kirby, J. Williams; Reactive Power Performance Requirements for Wind and Solar Plants; IEEE PES General Meeting, 2012.
A. Ellis, R. Nelson, E. Von Engeln, R. Walling, J. MacDowell, L. Casey, E. Seymour, W. Peter, C. Barker, B. Kirby, J. Williams; Review of Existing Reactive Power Requirements for Variable Generation; IEEE PES General Meeting, 2012.
A. Panosyan, R. Walling, E. Bärthlein, R. Witzmann; Reactive Power Compensation of Self-Induced Voltage Variations; CIRED 2012 Integration of Renewables into the Distribution Grid Workshop, Lisbon, May, 2012.
J. Schoene, R. Walling, B Yang, B. Niemann, V. Zheglov, D. Guinn, S. Peele, R. Zavadil, L. Freeman; Analysis and Mitigation of Excessive Zero-Sequence Harmonic Currents in Distribution Systems; IEEE PES 2012 Transmission and Distribution Conference and Exposition.
M. D. McDonald, R. A. Walling, R. D’Aquila, J. G. Cleary, Effect of Distributed Generation on Regional Voltage Stability; IEEE PES 2012 Transmission and Distribution Conference and Exposition.
T. Ackerman, editor, R. Walling and other contributing authors; Wind Power in Power Systems, 2nd Edition; (book), J. Wiley (publisher), 2012.
M. Brandao, A. Panosyan, R. Walling; Potential Strategies to Increase Rooftop Solar PV Penetration in LV Networks in Australia; IEEE Innovative Smart Grid Technologies Asia, Perth, Australia, Nov. 2011
R. Piwko, M. Bradt, E. Camm, A. Ellis, R. Walling, and M. O’Malley, A Blast of Activity; IEEE Power and Energy Magazine, Nov/Dec 2011.
E. Gursoy, R. Walling; Representation of Variable Speed Wind Turbine Generators for Short Circuit Analysis, 2011 IEEE Electrical Power and Energy Conference, Winnipeg, Manitoba, Oct. 2011.
R. Walling, E. Gursoy, A Universal Methodology for Specification and Modeling of Wind Turbine Short-Circuit Current Contribution Characteristics; 10th International Workshop on Large-Scale Integration of Wind Power into Power Systems As Well As on Transmission Networks for Offshore Wind Power Plants, Aarhus, Denmark, October 2011.
Y. Pan, W. Ren, S. Ray, R. Walling, M. Reichard; “Impact of Inverter Interfaced Distributed Generation on Overcurrent Protection in Distribution System; 2011 IEEE Power Engineering and Automation Conference, Wuhan, China, September, 2011.
K. Clark, R. A. Walling, N. W. Miller; Solar Photovoltaic (PV) Plant Models in PSLF; IEEE Power and Energy Society General Meeting, July, 2011
R. Walling, Application of Direct Transfer Trip for Prevention of DG Islanding, IEEE Power and Energy Society General Meeting, July, 2011
M. Bradt, B. Badrzadeh, E. Camm, D. Mueller, J. Schoene, T. Siebert, T. Smith, M. Starke, R. Walling; Harmonics and Resonance Issues in Wind Power Plants; IEEE PES General Meeting, July, 2011
R. A. Walling, E. Gursoy, B. English; Current Contributions from Type 3 and Type 4 Wind Turbine Generators During Faults; IEEE PES General Meeting, July, 2011.
J. Schoene, R. Zavadil, T. McDermott, L. Freeman, R. Walling, J. Fielder; Energy-Efficient Lighting's Impact on Peak Load, Losses; PowerGrid International Magazine, July 2011.
R. Walling, Z. Gao, Eliminating Voltage Variation Due to Distribution-Connected Renewable Generation, 2011 DistribuTECH Conference, San Diego, Feb. 2011
J. Schoene, T. McDermott, R. Zavadil, L. Freeman, R.Walling, J. Fielder; Perspectives on New and Emerging Customer Loads and the Impact on Utility Operations; 2011 DistribuTECH Conference, San Diego, Feb. 2011
K. Clark, L. Freeman, G. Jordan, N. Miller, R. Piwko, R. Walling, D. Lew; Impact of High Levels of Wind and Other Variable Renewable Generation on the Grid Operation: Summary of Major US Studies; CIGRE 2010, Paris, August, 2010.
R. Walling, A. Bourgault, R. Brzezinski; Interconnection of MW-Scale Wind Generators to Utility Distribution Systems; AWEA WindPower 2010 Conference
M. Bradt, M. R. Behnke, W. G. Bloethe, C. Brooks, E.H. Camm, W. Dilling, B. Goltz, J. Li, J. Niemira, K. Nuckles, J. Patiño, M. Reza, B. Richardson, N. Samaan, J. Schoene, T. Smith, I. Snyder, M. Starke, R. Walling, G. Zahalka; Power Transformer Application for Wind Plant Substations, IEEE PES 2010 Transmission and Distribution Conference and Exposition
M. Bradt, M. R. Behnke, W. G. Bloethe, C. Brooks, E.H. Camm, W. Dilling, B. Goltz, J. Li, J. Niemira, K. Nuckles, J. Patiño, M. Reza, B. Richardson, N. Samaan, J. Schoene, T. Smith, I. Snyder, M. Starke, R. Walling, G. Zahalka; Wind Plant Collector System Fault Protection and Coordination, IEEE PES 2010 Transmission and Distribution Conference and Exposition
M. Bradt, M. R. Behnke, W. G. Bloethe, C. Brooks, E.H. Camm, W. Dilling, B. Goltz, J. Li, J. Niemira, K. Nuckles, J. Patiño, M. Reza, B. Richardson, N. Samaan, J. Schoene, T. Smith, I. Snyder, M. Starke, R. Walling, G. Zahalka; Design and Application of Cables and Overhead Lines in Wind Power Plants; IEEE PES 2010 Transmission and Distribution Conference and Exposition
R. Walling, K. Clark, Grid Support Functions Implemented in Utility-Scale PV Systems, IEEE PES 2010 Transmission and Distribution Conference and Exposition, May, 2010.
B. Yang, R. Walling, L. Freeman, J. Skliutas, M. Marshall, · Improving Utility Energy Efficiency Through Loss Identification, IEEE PES 2010 Transmission and Distribution Conference and Exposition, May, 2010.
B. Yang, J. Weiss, R. Walling, L. Freeman, M. Marshall, The Breakdown and Mitigation of Technical Losses on Distribution Power Systems, 2010 DistribuTech Conference, March, 2010.
R. Walling, G. Jordan, Impacts of Wind Generation on Thermal Unit Operation, 2009 POWER-GEN International Conference, December, 2009.
J. Bebic, R. Walling, K. O'Brien, B. Kroposki, The Sun Also Rises, IEEE Power and Energy Magazine, Vol. 7, No. 3, 2009.
N. Miller, K. Clark, R. Walling, WINDINERTIA™: Controlled Inertial Response from GE Wind Turbine Generators, 2009 Minnesota Power Systems Conference, Brooklyn Heights, Minnesota, October, 2009.
R. Walling, M. Reichard, Short Circuit Behavior of Wind Turbine Generators, 62nd Annual Conference for Protective Relay Engineers, Texas A&M, 2009
R. Walling, L. Freeman, N. W. Miller, J. Freedman, W. Lasher, Risks of Extreme Wind Generation Output Changes in the ERCOT Market, 8th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Farms, Bremen, Germany, October, 2009.
E.H. Camm, M. R. Behnke, O. Bolado, M. Bollen, M. Bradt, C. Brooks, W. Dilling, M. Edds, W. J. Hejdak, D. Houseman, S. Klein, F. Li, J. Li, P. Maibach, T. Nicolai, J. Patiño, S. V. Pasupulati, N. Samaan, S. Saylors, T. Siebert, T. Smith, M. Starke, R. Walling; Wind Power Plant Substation and Collector System Redundancy, Reliability, and Economics, IEEE Power & Energy Society 2009 General Meeting
E.H. Camm, M. R. Behnke, O. Bolado, M. Bollen, M. Bradt, C. Brooks, W. Dilling, M. Edds, W. J. Hejdak, D. Houseman, S. Klein, F. Li, J. Li, P. Maibach, T. Nicolai, J. Patiño, S. V. Pasupulati, N. Samaan, S. Saylors, T. Siebert, T. Smith, M. Starke, R. Walling;·Wind Power Plant Collector System Design Considerations, IEEE Power & Energy Society 2009 General Meeting
E.H. Camm, M. R. Behnke, O. Bolado, M. Bollen, M. Bradt, C. Brooks, W. Dilling, M. Edds, W. J. Hejdak, D. Houseman, S. Klein, F. Li, J. Li, P. Maibach, T. Nicolai, J. Patiño, S. V. Pasupulati, N. Samaan, S. Saylors, T. Siebert, T. Smith, M. Starke, R. Walling; Wind Power Plant Grounding, Overvoltage Protection, and Insulation Coordination, Power & Energy Society 2009 General Meeting.
E.H. Camm, M. R. Behnke, O. Bolado, M. Bollen, M. Bradt, C. Brooks, W. Dilling, M. Edds, W. J. Hejdak, D. Houseman, S. Klein, F. Li, J. Li, P. Maibach, T. Nicolai, J. Patiño, S. V. Pasupulati, N. Samaan, S. Saylors, T. Siebert, T. Smith, M. Starke, R. Walling; Characteristics of Wind Turbine Generators for Wind Power Plants, IEEE Power & Energy Society 2009 General Meeting.
E.H. Camm, M. R. Behnke, O. Bolado, M. Bollen, M. Bradt, C. Brooks, W. Dilling, M. Edds, W. J. Hejdak, D. Houseman, S. Klein, F. Li, J. Li, P. Maibach, T. Nicolai, J. Patiño, S. V. Pasupulati, N. Samaan, S. Saylors, T. Siebert, T. Smith, M. Starke, R. Walling; Reactive Power Compensation for Wind Power Plants, IEEE Power & Energy Society 2009 General Meeting.
R. Walling, Islanding Issues for Large-Scale Wind Generators Interconnected to Local-Delivery Distribution Systems, IEEE Power & Energy Society General Meeting, 2009
L. Freeman, M. Marshall, R. Walling, J. Weiss, Loss Characteristics of Local-Delivery Distribution Systems, 20th International Conference on Electricity Distribution (CIRED), Prague, June 8-11, 2009.
R. Walling, L. Freeman, J. Freedman, W. Lasher, Risks of Extreme Wind Generation Output Changes in the ERCOT Market, American Wind Energy Association WindPower’09 Conference, 2009.
R. Walling, P. Riley, C. Gaytan, Optimization of Wind Turbine Unit Transformer Ratings, American Wind Energy Association WindPower’09 Conference, 2009.
R. Walling, L. Freeman, W. Lasher, Regulation Requirements with High Wind Generation Penetration in the ERCOT Market, IEEE Power Systems Conference and Exposition, 2009.
R. Piwko, E. Camm, A. Ellis, E. Muljadi, R. Zavadil, R. Walling, M. O'Malley, G. Irwin, S. Saylors, A Whirl of Activity, IEEE Power and Energy Magazine, Vol. 7, No. 6, 2009.
Walling, R.A., Saint, R., Dugan, R.C., Burke, J., Kojovic, L.A., Summary of Distributed Resources Impact on Power Delivery Systems, IEEE Transactions on Power Delivery, Vol. 23, No. 3, July, 2008.
R. Walling, P. Riley, C. Gaytan, Increasing Wind Plant Energy Output Using High-Efficiency Amorphous-Core Unit Transformers, American Wind Energy Association WindPower’08 Conference, 2008.
R. Walling, L. Freeman, N. Miller, G. Jordan, W. Lasher, Ancillary Services Requirements for Large-Scale Wind Penetration in the ERCOT Grid, American Wind Energy Association WindPower’08 Conference, 2008.
R. Walling, Overvoltage Protection and Arrester Selection for Large Wind Plants, IEEE Power Engineering Society 2008 Transmission and Distribution Conference and Exposition, April 21-24, 2008
R. A. Walling, G. B. Shattuck; Transformer Thermal Behavior and Aging in Distribution Delivery Systems; Electricity Today (magazine), March, 2008.
R. Walling, G. Shattuck, Distribution Transformer Thermal Behavior and Aging in Local-Delivery Distribution Systems, 19th International Conference on Electricity Distribution (CIRED), Vienna, May 21-24, 2007.
R. Walling, N. Miller, M. Cardinal, Advanced Wind Plant Controls to Enhance Grid Integration; Sixth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms, Delft, October 26-27, 2006
R. A. Walling, G. Drobnjak; System Grounding Considerations in Wind Power Plant Design - Avoiding Damaging Overvoltages; American Wind Energy Association WindPower ’06 Conference, May, 2006
R. Walling, , T. Ruddy, Optimization Of Wind Farm Collector System, North American Wind Power Magazine, November, 2005
J. Martinez, J. Mahseredjian,; R. Walling, Parameter Determination: Procedures for Modeling System Transients, IEEE Power and Energy Magazine, Vol. 3, No. 5, 2005.
R. Walling, K. Clark, N. Miller, J. Sanchez-Gasca, Advanced Controls for Mitigation of Flicker Using Doubly-Fed Asynchronous Wind Turbine-Generators, 18th International Conference on Electricity Distribution (CIRED), Turin, June 6-9, 2005.
R. Walling, , T. Ruddy, Optimization of Windfarm Collector System Design for Maximized Life Cycle Profitability, American Wind Energy Association WindPower ’05 Conference, May, 2005
R. Walling, D. Houghtaling, T. Ruddy, Economic Optimization of Offshore Windfarm Substations and Collection Systems , Fifth International Workshop on Large-Scale Integration of Wind Power and Transmission Networks for Offshore Wind Farms, Glasgow, April, 2005
R. Walling, G. Shattuck, M. Dreadin, Distribution Transformer Thermal Behavior and Aging Under Real-World Conditions; 2005 DistribuTech Conference, San Diego, January 25-27, 2005
J. Martinez, R. Walling, B. Mork, B.A., J. Martin-Arnedo, D. Durbak, Parameter Determination for Modeling System Transients-Part III: Transformers, IEEE Transactions on Power Deliver, Vol. 20, No. 3, 2005.
Ye, Z.; Kolwalkar, A.; Zhang, Y.; Du, P.; Walling, R., Evaluation of Anti-Islanding Schemes Based on Non-Detection Zone Concept, IEEE Transactions on Power Electronics, Volume: 19 , Issue: 5, Sept. 2004 Pages:1171 – 1176
Z. Ye, L. Li, L. Garces, C. Wang, R. Zhang, M. Dame, R. Walling, N. Miller, A New Family of Active Anti-Islanding Schemes Based on DQ Implementation for Grid-Connected Inverters, IEEE Power Electronics Specialist Conference, 2004
Walling, R., Ferroresonance in Low-Loss Distribution Transformers, Proceedings of the IEEE Power Engineering Society 2003 General Meeting, Volume: 2 , 13-17 July 2003, Pages: 1222 Vol. 2.
R. A. Walling, N. W. Miller, Distributed Generation Islanding – Implications on Power System Dynamic Performance, IEEE PES Summer Power Meeting, Chicago, July, 2002.
K. Tomiyama, S. Ihara, R.J. Piwko, E.R. Pratico, J.J. Sanchez-Gasca, R.A. Walling, L. Crane, Impedance Monitor Performance Tests, IEEE PES Winter Power Meeting, New York, January, 2002.
K. Tomiyama, S. Ihara, R.J. Piwko, E.R. Pratico, J.J. Sanchez-Gasca, R.A. Walling, Conceptual Design of Impedance Monitor Development for HVDC Stations, CIGRE, Paris, August, 2002.
N.W. Miller, R. A. Walling, A.S. Achilles, Impact of Distributed Resources on System Dynamic Performance, IEEE PES Transmission and Distribution Conference, Atlanta, October, 2001
Walling, R.A., Transformer Modeling for Low-Frequency Simulations, Proceedings of the IEEE Power Engineering Society 2001 Winter Meeting, , Volume: 2 , 28 Jan.-1 Feb. 2001, Pages:724 – 725, Vol.2.
K. Tomiyama, S. Ihara, R.J. Piwko, E.R. Pratico, J.J. Sanchez-Gasca, R.A. Walling, Impedance Monitor Development for HVDC Stations, CIGRE ICPS 2001 International Conference on Power Systems
T. Hasegawa, J. Matsushita, Y. Oue, K. Tomiyama, S. Ihara, E. Pratico, R. Walling, W. Zhu, Screening for HVDC System Core Saturation Instability, IEEE Transactions on Power Delivery, Volume 15, Issue 4, October 2000
Iravani, M.R.; Chaudhary, A.K.S.; Giesbrecht, W.J.; Hassan, I.E.; Keri, A.J.F.; Lee, K.C.; Martinez, J.A.; Morched, A.S.; Mork, B.A.; Parniani, M.; Sharshar, A.; Shirmohammadi, D.; Walling, R.A.; Woodford, D.A., Modeling and Analysis Guidelines for Slow Transients, Part III, the Study of Ferroresonance, IEEE Transactions on Power Delivery, Volume 15, Issue 1, Jan. 2000
Walling, R.; Komassa, D.; Lazar, J.; Shattuck, G.B., Investigation of Elbow and Insulated Bushing Cap Flashovers During Unloaded Switching, IEEE Power Engineering Society Summer 2000 Meeting.
Iravani, M.R.; Chandhary, A.K.S.; Giesbrecht, W.J.; Hassan, I.E.; Keri, A.J.F.; Lee, K.C.; Martinez, J.A.; Morched, A.S.; Mork, B.A.; Parniani, M.; Sarshar, A.; Shirmohammadi, D.; Walling, R.A.; Woodford, D.A.; Modelling and Analysis Guidelines for Slow Transients, Part II, Controller Interactions, Harmonic Interactions; IEEE Transactions on Power Delivery, Volume 11, Issue 3, July 1996
R. Walling, R. Hartana, W. Ros, Self-Generated Overvoltages Due to Open-Phasing of Ungrounded Wye-Delta Transformer Banks, IEEE Transactions on Power Delivery, Volume 10, Issue 1, Jan. 1995
R. Walling, R. Melchior, B. McDermott, Measurement of Cable Switching Transients in Underground Distribution Systems, IEEE Transactions on Power Delivery, Volume 10, Issue 1 , Jan. 1995
R. Walling, R. Hartana, R. Reckard, M. Sampat, T. Balgie, Performance of Metal-Oxide Arresters Exposed to Ferroresonance in Padmount Transformers, IEEE Transactions on Power Delivery, Volume 9, Issue 2, April 1994..
R. Walling, T. Compton, K. Barker, L. Zimmerman, Ferroresonant Overvoltages in Grounded Wye-Wye Padmount Transformer with Low-Loss Silicon-Steel Cores, IEEE Transactions on Power Delivery, Volume 8, Issue 3 , July 1993
R. Walling, J. Paserba, C. Burns, Series-Compensated Shield Scheme for Enhanced Mitigation of Transmission Line Magnetic Fields, IEEE Transactions on Power Delivery, Volume 8, Issue 1, Jan. 1993
Eitzmann, M.A.; Walling, R.A.; Sublich, M.; Khan, A.H.; Huynh, H.; Granger, M.; Dutil, A., Alternatives for Blocking Direct Current in AC System Neutrals at the Radisson/LG2 Complex, IEEE Transactions on Power Delivery, Volume 7, Issue 3, July 1992
M. Sheehan, R. Walling, Distribution Systems Testing, Application, and Research; Minnesota Power Systems Conference, October, 1992.
R. Walling, A Khan, Characteristics of Transformer Exciting Current During Geomagnetic Disturbances, IEEE Transactions on Power Delivery, Volume 6, Issue 4, Oct. 1991
Diemond, C.C.; Bowles, J.P.; Burtnyk, V.; Lebow, M.A.; Neudorf, E.G.; Povh, D.; Starr, E.C.; Taylor, C.W.; Walling, R.A.; AC-DC Economics and Alternatives-1987 Panel Session Report; IEEE Transactions on Power Delivery, Volume 5, Issue 4, Oct. 1990
R. Walling, M. Sublich, D. Lorden, S. Doe, Simultaneous Pole and Neutral Faults on an HVDC Line with Dedicated Metallic Return; IEEE Transactions on Power Delivery, Volume 5, Issue 2, April 1990
R. Walling; Why Solar-Magnetic Storms Can Cause System-Wide Blackouts, Electrical World, magazine, 1990
R. Walling, Upgrading Can Pay (re: AC to HVDC line conversion), Asian Electricity magazine, October, 1989
E. Larsen, R. Walling, C. Bridenbaugh, Parallel AC/DC Transmission Lines, Steady-State Induction Issues, IEEE Transactions on Power Delivery, Volume 4, Issue 1, Jan. 1989
R. Walling, E. Larsen, Converter Performance with Severe AC Voltage Distortion, International Symposium on Electric Energy Conversion in Power Systems, Capri, Italy, May, 1989.
R. Walling, A. Khan, Solar-Magnetic Disturbance Impact on Power System Performance and Security, EPRI Geomagnetically Induced Currents Conference, 1989.
R. Walling, E. Larsen, Characterization and Control of Harmonic Overvoltges at HVDC Stations, CIGRE HVDC Symposium, Boston, 1987.
R. Walling, Advanced HVDC Simulator for System Design Studies; American Power Conference, April, 1985