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Publications

Journal Papers

  • Pace, A., Johnson, K., and Wright, A., "Preventing Wind Turbine Overspeed in Extreme Wind Events Using DAC and LIDAR," Wind Energy, Vol. 18, no. 2, 2015, pp. 351-368.
  • P. Fleming, P. Gebraad, S. Lee, J.W. vanWingerden, K. Johnson, M. Churchfield, J. Michalakes, P. Spalart, and P. Moriarty, "Simulation comparison of wake mitigation control strategies for a two-turbine case," to appear in Wind Energy, (early access 10/15/14).
  • P. Fleming, P. Gebraad, S. Lee, J.W. vanWingerden, K. Johnson, M. Churchfield, J. Michalakes, P. Spalart, and P. Moriarty, "Evaluating techniques for redirecting turbine wake using SOWFA," Renewable Energy, Vol. 70, 2014, pp. 211-218.
  • Jeong, Y., Johnson, K., and Fleming, P., "Comparison and testing of power reserve control strategies for grid-connected wind turbines," Wind Energy, Vol. 17, no. 3, 2014, pp. 343-358.
  • Soleimanzadeh, M., Wisniewski, R., and Johnson, K., "A distributed optimization framework for wind farms," Journal of Wind Engineering & Industrial Aerodynamics, Vol. 123, pp. 88-98, 2013.
  • Wang, N. and Johnson, K., "Pulsed LIDAR-enabled torque controller design for turbine power capture enhancement and fatigue loads mitigation," IEEE Transactions on Control Systems Technology (special issue "To tame the wind: advanced control applications in wind energy"), Vol. 21, no. 4, 2013, pp. 1129-1142.
  • Soltani, M., Knudsen, T., Svenstrup, M., Wisniewski, R., Brath, P., Ortega, R., and Johnson, K., "Estimation of Rotor Effective Wind Speed: A Comparison," IEEE Transactions on Control Systems Technology (special issue "To tame the wind: advanced control applications in wind energy"), Vol. 21, no. 4, 2013, pp. 1155-1167.
  • Jeong, Y., Johnson, K., and Fleming, P., "Comparison and testing of power reserve control strategies for grid-connected wind turbines," Wind Energy, 2013 (early access 6 Feb. 2013).
  • Johnson, K. and Fritsch, G., "Assessment of Extremum Seeking Control for Wind Farm Energy Production," Wind Engineering, Vol. 36, no. 6, 2012.
  • Wang, N., Johnson, K., and Wright, A., "FX-RLS-based feedforward control for LIDAR-enabled wind turbine load mitigation," IEEE Transactions on Control Systems Technology, Vol. 20, no. 5, 2012, pp. 1212-1222.
  • Johnson, K. and Fleming, P., "Development, implementation, and testing of fault detection and condition monitoring on the Controls Advanced Research Turbiness," Mechatronics, Vol. 21, No. 4, June 2011, pp. 728-736. Available here.
  • Darrow, P.J., Johnson, K., and Wright, A., "Design of a tower and drive train damping controller for the 3-bladed Controls Advanced Research Turbine operating in design- driving load cases," Wind Energy, Vol. 14, No. 4, May 2011, pp. 571-601. Available here.
  • Pao, L. and Johnson, K., "Control of wind turbines: Approaches, Challenges, and Recent developments," IEEE Control Systems Magazine, Vol. 31, No. 2, April 2011, pp. 44-62.
  • Johnson, K. and Rex, A., 2009, "Methods for controlling a wind turbine system with a continuously variable transmission in region 2," Journal of Solar Energy Engineering, Vol. 131, No. 3, pp. 031012-1 - 031012-8.
  • Johnson, K. and Fingersh, L., 2008, "Adaptive pitch control of variable-speed wind turbines," Journal of Solar Energy Engineering, Vol. 130, No. 3, pp. 031012-1 - 031012-7. Paper available here to JSEE subscribers.
  • Johnson, K., Pao, L., Balas, M., and Fingersh, L., 2006, "Control of Variable Speed Wind Turbines: standard and adaptive techniques for maximizing energy capture," IEEE Control Systems Magazine, Vol. 26, No. 3, pp. 70-81.
  • Johnson, K., Fingersh, L., Balas, M., and Pao, L., 2004, "Methods for Increasing Region 2 Power Capture on a Variable Speed Wind Turbine," Journal of Solar Energy Engineering, Vol. 126, pp. 1092-1100.

Conference Papers

  • Johnson, K., Leydens, J. Moskal, B., Fantasky, J., and Silva, D., "Social Justice in Control Systems Engineering," Proceedings of the American Society for Engineering Education Annual Conference and Exhibition, 2015.
  • Annoni, Jennifer, Peter Seiler, Kathryn Johnson, Paul Fleming, Pieter M.O. Gebraad, "Evaluating Wake Models for Wind Farm Control," Proceedings of the American Control Conference, Portland, OR, 2014.
  • Wang, Na, Kathryn Johnson, Alan Wright, Carlo Carcangiu, "LIDAR-assisted Wind Turbine Feedforward Torque Controller Design Below Rated," Proceedings of the American Control Conference, Portland, OR, 2014.
  • Wang, N., Johnson, K., Wright, A., and Carcangiu, C., "LIDAR-assisted Preview Controller Design for a MW-scale Commercial Wind Turbine," Proceedings of the Conference on Decision and Control, Florence, Italy, December 2013.
  • Rezaei, V. and Johnson, K., "Robust fault tolerant pitch control of wind turbines," Proceedings of the Conference on Decision and Control, Florence, Italy, December 2013.
  • Odgaard, P. and Johnson, K., "Wind turbine fault detection and fault tolerant control - a second challenge," Proceedings of the American Control Conference, Washington, D.C., June 2013.
  • P. Fleming, P. Gebraad, S. Lee, J.W. vanWingerden, K. Johnson, M. Churchfield, J. Michalakes, P. Spalart, and P. Moriarty, "Evaluating techniques for redirecting turbine wake using SOWFA," to appear in the Proceedings of ICOWES, Lyngby, June 2013.
  • P. Fleming, P. Gebraad, S. Lee, J.W. vanWingerden, K. Johnson, M. Churchfield, J. Michalakes, P. Spalart, and P. Moriarty, "High-fidelity simulation comparison of wake mitigation control strategies for a two-turbine case," Proceedings of ICOWES, Lyngby, June 2013.
  • Pace, A., Johnson, K., and Wright., A., 2013, "LIDAR-based Extreme Event Control to Prevent Wind Turbine Overspeed," Proceedings of the AIAA Aerospace Sciences Meeting and Exhibit.
  • Aho, J., A. Buckspan, J. Laks, P. Fleming, Y. Jeong, F. Dunne, M. Churchfield, L. Pao, K. Johnson, 2012, "A Tutorial of Wind Turbine Control for Supporting Grid Frequency through Active Power Control," Proceedings of the 2012 American Control Conference, Montreal, Canada.
  • Wang, N., Johnson, K., and Wright, A., 2012, "Combined feedforward and feedback controllers for turbine power capture enhancement and fatigue loads mitigation with pulsed LIDAR," Proceedings of the AIAA/ASME Wind Energy Symposium, Nashville, TN.
  • El Azzouzi, F.A. and Johnson, K., 2012, "Single-sensor-based Fault Detection in Wind Turbines," Proceedings of the AIAA/ASME Wind Energy Symposium, Nashville, TN.
  • Lucena, J., Delborne, J., Johnson, K., Leydens, J., Munakata-Marr, J., and Schneider, J., 2011, "Integration of climate change in the analysis and design of engineered systems: Barriers and opportunities for engineering education," Proceedings of the ASME 2011 International Mechanical Engineering Congress & Exposition, Denver, CO.
  • Wang, N., Johnson, K., and Wright, A., 2011, "LIDAR-based FX-RLS feedforward control for wind turbine load mitigation," Proceedings of the American Control Conference, San Francisco, CA, pp. 1910-1915.
  • Wang, N. and Johnson, K., 2011, "Combined Lidar-based feedforward and feedback controllers for wind turbines with tower and blade damping," Proceedings of the 2011 AIAA/ASME Wind Energy Symposium, Orlando, FL.
  • Johnson, K. and Thomas, N., 2009, "Wind farm control: addressing the aerodynamic interaction among wind turbines," Proceedings of the American Control Conference, St. Louis, MO.
  • Pao, L. and Johnson, K., 2009, "A tutorial on the dynamics and control of wind turbines and wind farms," Proceedings of the American Control Conference, St. Louis, MO.
  • Darrow, P.J., Wright, A., and Johnson, K., 2009, "Wind turbine control design to reduce capital costs," Proceedings of the AIAA/ASME Wind Energy Symposium, Orlando, FL, (electronic).
  • Rex, A. and Johnson, K., 2008, "Model Development of a Wind Turbine System with a Continuously Variable Transmission for Design of Region 2 Speed Control," Proceedings of the 2008 AIAA/ASME Wind Energy Symposium, Reno, NV (electronic).
  • Johnson, K., and Fingersh, L., 2007, "Adaptive Pitch Control of Variable Speed Wind Turbines," Proceedings of the 26th ASME Wind Energy Symposium, Reno, NV.
  • Johnson, K., Fingersh, L., Pao, L., and Balas, M., 2005, "Adaptive Torque Control of Variable Speed Wind Turbines for Increased Region 2 Energy Capture," Proceedings of the 24th ASME Wind Energy Symposium, Reno, NV, pp. 66-76.
  • Johnson, K., Pao, L., Balas, M., Kulkarni, V., and Fingersh, L., 2004, "Stability Analysis of an Adaptive Torque Controller for Variable Speed Wind Turbines," Proceedings of the Conference on Decision and Control, Paradise Island, Bahamas, pp. 4087-4094. NREL preprint available here.
  • Hand, M., Fingersh, L., Johnson, K., and Wright, A., 2004, "Advanced Control Design and Field Testing for Wind Turbines at the National Renewable Energy Laboratory," Proceedings of the World Renewable Energy Congress VIII, Denver, CO. NREL preprint available here.
  • Johnson, K., Fingersh, L., Balas, M., and Pao, L., 2004, "Methods for Increasing Region 2 Power Capture on a Variable Speed HAWT," Proceedings of the 23rd ASME Wind Energy Symposium, Reno, NV, pp. 103-113. NREL preprint available here.
  • Fingersh, L. and Johnson, K., 2004, "Baseline Results and Future Plans for the NREL Controls Advanced Research Turbine," Proceedings of the 23rd ASME Wind Energy Symposium, Reno, NV, pp. 87-93. NREL preprint available here.

Invited Publications

  • Invited review of Wind Turbine Control Systems by Fernando D. Bianchi, Hernan De Battista, and Ricardo J. Mantz, IEEE Control Systems Magazine, Oct. 2007, pp. 124-126.

NREL Technical Reports

  • Fleming, P., Gebraad, P., Churchfield, M., Lee, S., Johnson, K., Michalakes, J., van Wingerden, J.W. and Moriarty, P., SOWFA + Super Controller User's Manual, NREL Report No. TP-5000-59197, Aug. 2013.
  • Johnson, K., Fingersh, L., and Wright, A., 2005, Controls Advanced Research Turbine: Lessons Learned during Advanced Controls Testing, NREL Report No. TP-500-38130.
  • Fingersh, L. and Johnson, K., 2002, Controls Advanced Research Turbine (CART) Commissioning and Baseline Data Collection, NREL Report No. TP-500-32879.