Publications and Patents

Wei Qiao: Google Scholar Citations

Liyan Qu: Google Scholar Citations

Book Chapters:

  1. W. Qiao, “Chapter 8: Swarm Intelligence for Power System Control and Optimization,” in Evolutionary Computing for Intelligent Power System Optimization and Control, Z. Xu and Z. Fan ed., Nova Science Publishers, 2010, ISBN: 978-1-61728-031-3.
  2. W. Qiao, “Chapter 28: Power Electronics for Renewable Energy,” in The Electric Power Engineering Handbook: Power Systems, 3rd Edition, CRC Press, May 2012, ISBN: 9781439856338.

Refereed Journal Papers:

  1. L. He, L. Hao, and W. Qiao, “Remote monitoring and diagnosis of pitch bearing defects in a MW-scale wind turbine using pitch symmetrical-component analysis,” IEEE Trans. Industry Applications, accepted for publication.
  2. J. Cui, L. Qu, and W. Qiao, “Electromagnetic transformer with a continuously and quickly adjustable voltage ratio,” IEEE Trans. Industry Applications, accepted for publication.
  3. J. C. do Prado and W. Qiao, “A stochastic distribution system market clearing and settlement model with distributed renewable energy utilization constraints,” IEEE Systems Journal, accepted for publication.
  4. D. Xiao, M. K. AlAshery, and W. Qiao, “Optimal price-maker trading strategy of a wind power producer using virtual bidding,” Journal of Modern Power Systems and Clean Energy, accepted for publication.
  5. Y. Peng, W. Qiao, and L. Qu, “Compressive sensing-based missing-data-tolerant fault detection for remote condition monitoring of wind turbines,” IEEE Trans. Industrial Electronics, accepted for publication.
  6. F. Chen, W. Qiao, H. Wang, and L. Qu, “A simple zero-sequence voltage injection method for carrier-based pulse-width modulation of the three-level NPC inverter,” IEEE Journal of Emerging and Selected Topics in Power Electronics, accepted for publication.
  7. Z. Wang, W. Qiao, and L. Qu, “A real-time adaptive IGBT thermal model based on an effective heat propagation path concept,” IEEE Journal of Emerging and Selected Topics in Power Electronics, accepted for publication. 
  8. L. Qu, W. Qiao, and L. Qu, “An extended-state-observer-based sliding-mode speed control for permanent-magnet synchronous motors,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 2, pp. 1605-1613, Apr. 2021.
  9. X. Jin, Z. Xu, and W. Qiao, “Condition monitoring of wind turbine generators using SCADA data analysis,” IEEE Trans. Sustainable Energy, vol. 12, no. 1, pp. 202-210, Jan. 2021.
  10. M. K. AlAshery, Z. Yi, D. Shi, X. Lu, C. Xu, Z. Wang, and W. Qiao, “A blockchain and IoT enabled multi-settlement peer-to-peer transactive energy trading framework,” IEEE Trans. Smart Grid, vol. 12, no. 1, pp. 885-896, Jan. 2021.
  11. D. Xiao, J. C. do Prado, and W. Qiao, “Optimal joint demand and virtual bidding for a strategic retailer in the short-term electricity market,” Electric Power Systems Research, vol. 190, Article# 106855, Jan. 2021.
  12. L. Qu, W. Qiao, and L. Qu, “Active-disturbance-rejection-based sliding-mode current control for permanent-magnet synchronous motors,” IEEE Trans. Power Electronics, vol. 36, no. 1, pp. 751-760, Jan. 2021.
  13. J. C. do Prado and W. Qiao, “A stochastic bilevel model for an electricity retailer in a liberalized distributed renewable energy market,” IEEE Trans. Sustainable Energy, vol. 11, no. 4, pp. 2803-2812, Oct. 2020.
  14. M. K. AlAshery, D. Xiao, and W. Qiao, “Second-order stochastic dominance constraints for risk management of a wind power producer’s optimal bidding strategy,” IEEE Trans. Sustainable Energy, vol. 11, no. 3, pp. 1404-1413, Jul. 2020.
  15. S. Nath, J. Wu, Y. Zhao, and W. Qiao, “Low latency bearing fault detection of direct-drive wind turbines using stator current,” IEEE Access, vol. 8, pp. 44163-44174, 2020.
  16. Lizhi Qu, W. Qiao, and Liyan Qu, “An enhanced linear active disturbance rejection rotor position sensorless control for permanent magnet synchronous motors,” IEEE Trans. Power Electronics, vol. 35, no. 6, pp. 6175-6184, Jun. 2020.
  17. T. Kim, W. Qiao, and L. Qu, “An enhanced hybrid battery model,” IEEE Trans. Energy Conversion, vol. 34, no. 4, pp. 1848-1858, Dec. 2019.
  18. X. Jin, Z. Que, Y. Sun, Y. Guo, and W. Qiao, “A data-driven approach for bearing fault prognostics,” IEEE Trans. Industry Applications, vol. 55, no. 4, pp. 3394-3401, Jul./Aug. 2019.
  19. F. Cheng, L. Qu, W. Qiao, C. Wei, and L. Hao, “Fault diagnosis of wind turbine gearboxes based on DFIG stator current envelope analysis,” IEEE Trans. Sustainable Energy, vol. 10, no. 3, pp. 1044-1053, Jul. 2019.
  20. J. C. do Prado and W. Qiao, “A stochastic decision-making model for an electricity retailer with intermittent renewable energy and short-term demand response,” IEEE Trans. Smart Grid, vol. 10, no. 3, pp. 2581-2592, May 2019.
  21. F. Cheng, L. Qu, W. Qiao, and L. Hao, “Enhanced particle filtering for remaining useful life prediction of a wind turbine drivetrain gearbox,” IEEE Trans. Industrial Electronics, vol. 66, no. 6, pp. 4738-4748, Jun. 2019.
  22. J. Wang, W. Qiao, and L. Qu, “Wind turbine bearing fault diagnosis based on sparse representation of condition monitoring signals,” IEEE Trans. Industry Applications, vol. 55, no. 2, pp 1844-1852, Mar.-Apr. 2019.
  23. Josue Campos do Prado, Wei Qiao, Liyan Qu, and Julio Romero Agüero, “The next-generation retail electricity market in the context of distributed energy resources: Vision and integrating framework,” Energies, vol. 12, no. 3, 491, Feb. 2019.
  24. Z. Zhang, W. Qiao, and Q. Hui, “Power system stabilization using energy-dissipating hybrid control,” IEEE Trans. Power Systems, vol. 34, no. 1, pp 215-224, Jan. 2019.
  25. X. Jin, F. Cheng, Y. Peng, W. Qiao, and L. Qu, “Drivetrain gearbox fault diagnosis:  Vibration- and current-based approaches,” IEEE Industry Applications Magazine, vol. 24, no. 6, pp. 56-66, Nov.-Dec. 2018.
  26. W. Qiao and L. Qu, “Prognostic condition monitoring for wind turbine drivetrains via generator current analysis,” Chinese Journal of Electrical Engineering, vol. 4, no. 3, pp. 80-89, Sept. 2018.
  27. Y. Peng, W. Qiao, L. Qu, and J. Wang, “Sensor fault detection and isolation for a wireless sensor network-based remote wind turbine condition monitoring system,” IEEE Trans. Industry Applications, vol. 54, no. 2, pp 1072-1079, Mar.-Apr. 2018.
  28. F. Cheng, J. Wang, L. Qu, and W. Qiao, “Rotor current-based fault diagnosis for DFIG wind turbine drivetrain gearboxes using frequency analysis and a deep classifier,” IEEE Trans. Industry Applications, vol. 54, no. 2, pp 1062-1071, Mar.-Apr. 2018.
  29. J. Wang, F. Cheng, W. Qiao, and L. Qu, “Multiscale filtering reconstruction for wind turbine gearbox fault diagnosis under varying-speed and noisy conditions,” IEEE Trans. Industrial Electronics, vol. 65, no. 5, pp 4268-4278, May 2018.
  30. F. Cheng, L. Qu, and W. Qiao, “Fault prognosis and remaining useful life prediction of wind turbine drivetrain gearboxes using current signal analysis,” IEEE Trans. Sustainable Energy, vol. 9, no. 1, pp 157-167, Jan. 2018.
  31. D. Lu, W. Qiao, and X. Gong, “Current-based gear fault detection for wind turbine gearboxes,” IEEE Trans. Sustainable Energy, vol. 8, no. 4, pp. 1453-1462, Oct. 2017.
  32. J. Wang, Y. Peng, W. Qiao, and J. L. Hudgins, “Bearing fault diagnosis of direct-drive wind turbines using multiscale filtering spectrum,” IEEE Trans. Industry Applications, vol. 53, no. 3, pp. 3029-3038, May-Jun. 2017.
  33. F. Cheng, Y. Peng, L. Qu, and W. Qiao, “Current-based fault detection and identification for wind turbine drivetrain gearboxes,” IEEE Trans. Industry Applications, vol. 53, no. 2, pp. 878-887, Mar.-Apr. 2017.
  34. H. Wang, L. Qu, W. Qiao, and B. Liu, “Magnetic flux valve: A magnetoelectric materials-based device for conversion and control of electric power,” IEEE Trans. Industrial Electronics, vol. 64, no. 3, pp. 2451-2458, Mar. 2017.
  35. T. Dai and W. Qiao, “Finding equilibria in the pool-based electricity market with strategic wind power producers and network constraints,” IEEE Trans. Power Systems, vol. 32, no. 1, pp. 389-399, Jan. 2017.
  36. J. Wang, Y. Peng, and W. Qiao, “Current-aided order tracking of vibration signals for bearing fault diagnosis of direct-drive wind turbines,” IEEE Trans. Industrial Electronics, vol. 63, no. 10, pp. 6336-6346, Oct. 2016.
  37. C. Wei, Z. Zhang, W. Qiao, and L. Qu, “An adaptive network-based reinforcement learning method for MPPT control of PMSG wind energy conversion systems,” IEEE Trans. Power Electronics, vol. 31, no. 11, pp. 7837-7848, Nov. 2016.
  38. X. Bai, W. Qiao, and L. Qu, “Robust AC optimal power flow for power networks with wind power generation,” IEEE Trans. Power Systems, vol. 31, no. 5, pp. 4163-4164, Sept. 2016.
  39. Z. Zhang, C. Wei, W. Qiao, and L. Qu, “Adaptive saturation controller-based direct torque control for permanent-magnet synchronous machines,” IEEE Trans. Power Electronics, vol. 31, no. 10, pp. 7112-7122, Oct. 2016.
  40. Z. Wang and W. Qiao, “A physics-based improved Cauer-type thermal equivalent circuit for IGBT modules,” IEEE Trans. Power Electronics, vol. 31, no. 10, pp. 6781-6786, Oct. 2016.
  41. X. Jin, W. Qiao, Y. Peng, F. Cheng, and L. Qu, “Quantitative evaluation of wind turbine faults under variable operational conditions,” IEEE Trans. Industry Applications, vol. 52, no. 3, pp. 2061-2069, May/Jun. 2016.
  42. Z. Wang, B. Tian, W. Qiao, and L. Qu, “Real-time aging monitoring for IGBT modules using case temperature,” IEEE Trans. Industrial Electronics, vol. 63, no. 2, pp. 1168-1178, Feb. 2016.
  43. Y. Shen, D. Ke, Y. Sun, D. S. Kirschen, W. Qiao, and X. Deng, “Advanced auxiliary control of an energy storage device for transient voltage support of a doubly-fed induction generator,” IEEE Trans. Sustainable Energy, vol. 7, no. 1, pp 63-76, Jan. 2016.
  44. Y. Shen, D. Ke, W. Qiao, Y. Sun, D. S. Kirschen, and C. Wei, “Transient reconfiguration and coordinated control for power converters to enhance the LVRT of a DFIG wind turbine with an energy storage device,” IEEE Trans. Energy Conversion, vol. 30, no. 4, pp. 1679-1690, Dec. 2015.
  45. H. Wang, L. Qu, and W. Qiao, “Adjustable-voltage-ratio magnetoelectric transformer,” IEEE Magnetics Letters, vol. 6, Article# 6000104, 2015.
  46. W. Qiao, P. Zhang, and M.-Y. Chow, “Condition monitoring, diagnosis, prognosis, and health management for wind energy conversion systems,” IEEE Trans. Industrial Electronics, vol. 62, no. 10, pp. 6533-6536, Oct. 2015.
  47. W. Qiao and D. Lu, “A survey on wind turbine condition monitoring and fault diagnosis-Part I: Components and subsystems,” IEEE Trans. Industrial Electronics, vol. 62, no. 10, pp. 6536-6545, Oct. 2015. 
  48. W. Qiao and D. Lu, “A survey on wind turbine condition monitoring and fault diagnosis-Part II: Signals and signal processing methods,” IEEE Trans. Industrial Electronics, vol. 62, no. 10, pp. 6546-6557, Oct. 2015.
  49. C. Wei, Z. Zhang, W. Qiao, and L. Qu, “Reinforcement learning-based intelligent maximum power point tracking control for wind energy conversion systems,” IEEE Trans. Industrial Electronics, vol. 62, no. 10, pp. 6360-6370, Oct. 2015. 
  50. T. Kim, Y. Wang, Z. Sahinoglu, T. Wada, S. Hara, and W. Qiao, “Model-based condition monitoring for lithium-ion batteries,” Journal of Power Sources, vol. 295, pp. 16-27, Nov. 2015.
  51. T. Kim, Y. Wang, Z. Sahinoglu, T. Wada, S. Hara, and W. Qiao, “A Rayleigh quotient-based recursive total-least-squares online maximum capacity estimation for lithium-ion batteries,” IEEE Trans. Energy Conversion, vol. 30, no. 3, pp. 842-851, Sept. 2015.
  52. Z. Zhang, Y. Zhao, W. Qiao, and L. Qu, “A discrete-time direct-torque control for direct-drive PMSG-based wind energy conversion systems,” IEEE Trans. Industry Applications, vol. 51, no. 4, pp. 3504-3514, Jul.-Aug. 2015.
  53. J. Zeng, W. Qiao, and L. Qu, “An isolated three-port bidirectional DC-DC converter for photovoltaic systems with energy storage,” IEEE Trans. Industry Applications, vol. 51, no. 4, pp. 3493-3503, Jul.-Aug. 2015.
  54. T. Gachovska, B. Tian, J. L. Hudgins, W. Qiao, and J. Donlon, “A real-time thermal model for monitoring of power semiconductor devices,” IEEE Trans. Industry Applications, vol. 51, no. 4, pp. 3361-3367, Jul.-Aug. 2015.
  55. J. Zeng, W. Qiao, and L. Qu, “LCL-resonant single-switch isolated DC-DC converter,” IET Power Electronics, vol. 8, no. 7, pp. 1209-1216, Jul. 2015.
  56. T. Dai and W. Qiao, “Optimal bidding strategy of a strategic wind power producer in the short-term market,” IEEE Trans. Sustainable Energy, vol. 6, no. 3, pp. 707-719, Jul. 2015.
  57. X. Bai and W. Qiao, “Robust optimization for bidirectional dispatch coordination of large-scale V2G,” IEEE Trans. Smart Grid, vol. 6, no. 4, pp. 1944-1954, Jul. 2015.
  58. Y. Zhao, W. Qiao, and L. Wu, “Dead-time effect analysis and compensation for a sliding-mode position observer-based sensorless IPMSM control system,” IEEE Trans. Industry Applications, vol. 51, no. 3, pp. 2528-2535, May/Jun. 2015.
  59. G. Liu, W. Hou, W. Qiao, and M. Han, “A fast-response fiber-optic anemometer with temperature self-compensation,” Optics Express, vol. 23, no. 10, pp. 13562-13570, May 2015.
  60. Z. Wang and W. Qiao, “An online frequency-domain junction temperature estimation method for IGBT modules,” IEEE Trans. Power Electronics, vol. 30, no. 9, pp. 4633-4637, Aug. 2015. 
  61. Y. Zhao, Z. Zhang, W. Qiao, and L. Wu, “An extended flux model-based rotor position estimator for sensorless control of salient-pole permanent-magnet synchronous machines,” IEEE Trans. Power Electronics, vol. 30, no. 8, pp. 4412-4422, Aug. 2015. 
  62. X. Gong and W. Qiao, “Current-based fault detection for direct-drive wind turbines via synchronous sampling and impulse detection,” IEEE Trans. Industrial Electronics, vol. 62, no. 3, pp. 1693-1720, Mar. 2015. 
  63. X. Bai, W. Qiao, H. Wei, F. Huang, and Y. Chen, “Bidirectional coordinating dispatch of large-scale V2G in future smart grid using complementarity optimization,” International Journal of Electrical Power and Energy Systems, vol. 68, pp. 269-277, Jun. 2015.
  64. Y. Zhao, W. Qiao, and L. Wu, “Improved rotor position and speed estimators for sensorless control of interior permanent magnet synchronous machines,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 2, no. 3, pp. 627-639, Sept. 2014.
  65. J. Zeng, Z. Zhang, and W. Qiao, “An interconnection and damping assignment passivity-based controller for a DC-DC boost converter with a constant power load,” IEEE Trans. Industry Applications, vol. 50, no. 4, pp. 2314-2322, Jul./Aug. 2014.
  66. Z. Zhang, Y. Zhao, W. Qiao, and L. Qu, “A space-vector modulated sensorless direct-torque control for direct-drive PMSG wind turbines,” IEEE Trans. Industry Applications, vol. 50, no. 4, pp. 2331-2341, Jul./Aug. 2014.
  67. Y. Zhao, W. Qiao, and D. Ha, “A sliding-mode duty-ratio controller for DC/DC buck converters with constant power loads,” IEEE Trans. Industry Applications, vol. 50, no. 2, pp. 1448-1458, Mar/Apr 2014.
  68. J. Zeng, W. Qiao, L. Qu, and Y. Jiao, “An isolated multiport DC-DC converter for simultaneous power management of multiple different renewable energy sources,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 2, no. 1, pp. 70-78, Mar. 2014.
  69. S. Kahrobaee, S. Asgarpoor, and W. Qiao, “Optimum sizing of distributed generation and storage capacity in smart households,” IEEE Trans. Smart Grid, vol. 4, no. 4, pp. 1791-1801, Dec. 2013.
  70. Y. Zhao, C. Wei, Z. Zhang, and W. Qiao, “A review on position/speed sensorless control for permanent magnet synchronous machine-based wind energy conversion systems,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 1, no. 4, pp. 203-216, Dec. 2013.
  71. T. Dai and W. Qiao, “Trading wind power in a competitive electricity market using stochastic programming and game theory,” IEEE Trans. Sustainable Energy, vol. 4, no. 3, pp. 805-815, Jul. 2013.
  72. Y. Zhao, W. Qiao, and L. Wu, “An adaptive quasi sliding-mode rotor position observer-based sensorless control for interior permanent magnet synchronous machines,” IEEE Trans. Power Electronics, vol. 28, no. 12, pp. 5618-5629, Dec. 2013.
  73. X. Gong and W. Qiao, “Bearing fault diagnosis for direct-drive wind turbines via current demodulated signals,” IEEE Trans. Industrial Electronics, vol. 60, no. 8, pp. 3419-3428, Aug. 2013.
  74. J. Zeng and W. Qiao, “Short-term solar power prediction using a support vector machine,” Renewable Energy, vol. 52, pp. 118-127, Apr. 2013.
  75. T. Kim, W. Qiao, and L. Qu, “Power electronics-enabled self-X multicell batteries: A design toward smart batteries,” IEEE Trans. Power Electronics, vol. 27, no. 11, pp. 4723-4733, Nov. 2012.
  76. X. Gong and W. Qiao, “Imbalance fault detection of direct-drive wind turbines using generator current signals,” IEEE Trans. Energy Conversion, vol. 27, no. 2, pp. 468-476, June 2012.
  77. J. Zeng and W. Qiao, “Short-term wind power prediction using a wavelet support vector machine,” IEEE Trans. Sustainable Energy, vol. 3, no. 2, pp. 255-264, Apr. 2012.
  78. W. Qiao, X. Yang, and X. Gong, “Wind speed and rotor position sensorless control for direct-drive PMG wind turbines,” IEEE Trans. Industry Applications, vol. 48, no. 1, pp. 3-11, Jan/Feb 2012.
  79. T. Kim and W. Qiao, “A hybrid battery model capable of capturing dynamic circuit characteristics and nonlinear capacity effects,” IEEE Trans. Energy Conversion, vol. 26, no. 4, pp. 1172-1180, Dec. 2011.
  80. L. Qu and W. Qiao, “Constant power control of DFIG wind turbines with supercapacitor energy storage,” IEEE Trans. Industry Applications, vol. 47, no. 1, pp. 359-367, Jan/Feb 2011.
  81. F. Li, W. Qiao, H. Sun, H. Wan, J. Wang, Y. Xia, Z. Xu, and P. Zhang, “Smart transmission grid: vision and framework,” IEEE Trans. Smart Grid, vol. 1, no. 2, pp. 168-177, Sept. 2010.
  82. J. Liang, W. Qiao, and R. G. Harley, “Feed-forward transient current control for low-voltage ride-through enhancement of DFIG wind turbines,” IEEE Trans. Energy Conversion, vol. 25, no. 3, pp. 836-843, Sept. 2010.
  83. W. Qiao, L. Qu, and R. G. Harley, “Control of IPM synchronous generator for maximum wind power generation considering magnetic saturation,” IEEE Trans. Industry Applications, vol. 45, no. 3, pp. 1095-1105, May/June 2009.
  84. W. Qiao, G. K. Vanayagamoorthy, and R. G. Harley, "Missing-sensor-fault-tolerant control for SSSC FACTS device with real-time implementation," IEEE Trans. Power Delivery, vol. 24, no. 2, pp. 740-750, Apr. 2009.
  85. W. Qiao, R. G. Harley, and G. K. Vanayagamoorthy, "Coordinated reactive power control of a large wind farm and a STATCOM using heuristic dynamic programming," IEEE Trans. Energy Conversion, vol. 24, no. 2, pp. 493-503, June 2009.
  86. W. Qiao, G. K. Venayagamoorthy, and R. G. Harley, "Real-time implementation of a STATCOM on a wind farm equipped with doubly fed induction generators," IEEE Trans. Industry Applications, vol. 45, no. 1, pp. 98-107, Jan./Feb. 2009.
  87. W. Qiao, W. Zhou, J. M. Aller, and R. G. Harley, "Wind speed estimation based sensorless output maximization control for a wind turbine driving a DFIG," IEEE Trans. Power Electronics, vol. 23, no. 3, pp. 1156-1169, May 2008.
  88. W. Qiao, R. G. Harley, and G. K. Venayagamoorthy, "Fault-tolerant optimal neurocontrol for a static synchronous series compensator connected to a power network," IEEE Trans. Industry Applications, vol. 44, no. 1, pp. 74-84, Jan./Feb. 2008.
  89. W. Qiao, R. G. Harley, and G. K. Vanayagamoorthy, "Fault-tolerant indirect adaptive neurocontrol for a static synchronous series compensator in a power network with missing sensor measurements," IEEE Trans. Neural Networks, vol. 19, no. 7, pp. 1179-1195, July 2008.
  90. W. Qiao, G. K. Venayagamoorthy, and R. G. Harley, "Optimal wide-area monitoring and nonlinear adaptive coordinating neurocontrol of a power system with wind power integration and multiple FACTS devices," Neural Networks (Elsevier), vol. 21, no. 2-3, pp. 466-475, Mar.-Apr. 2008.
  91. W. Qiao, Z. Gao, R. G. Harley, and G. K. Vanayagamoorthy, "Robust neuro-identification of nonlinear plants in electric power systems with missing sensor measurements," IFAC Journal: Engineering Applications of Artificial Intelligence (Elsevier), vol. 12, no. 4, pp. 604-618, June 2008.
  92. W. Qiao and R. G. Harley, "Indirect adaptive external neuro-control for a series capacitive reactance compensator based on a voltage source PWM converter in damping power oscillations," IEEE Trans. Industrial Electronics, vol. 54, no. 1, pp. 77-85, Feb. 2007.
  93. W. Qiao, Z. N. Chen, and K. Wu, "UWB monopole antenna with a top-hat sleeve," International Journal of Microwave and Optical Technology, vol. 1, no. 1, pp. 17-27, June 2006.

Refereed Conference Proceeding Papers:

  1. C. Wei, J. Xu, Q. Chen, and W. Qiao, “Anti-disturbance full-order sliding mode control of PMSG-based wind energy conversion systems,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE 2020), Detroit, MI, USA, Oct. 11-15, 2020, pp. 81-85.
  2. M. Penne, W. Qiao, L. Qu, J. Wang, and S. Li, “Model predictive saturation controller-based direct torque control of permanent magnet synchronous machines,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE 2020), Detroit, MI, USA, Oct. 11-15, 2020, pp. 2682-2688.
  3. C. Entzminger, W. Qiao, and L. Qu, “Case temperature monitoring-based online condition monitoring of SiC MOSFET power module using a radial basis function network,” in Proc. IEEE Energy Conversion Congress and Exposition (ECCE 2020), Detroit, MI, USA, Oct. 11-15, 2020, pp. 5296-5301.
  4. M. K. AlAshery, W. Qiao, and L. Qu, “Portfolio risk management via a CVaR and stochastic dominance hybrid approach,” in Proc. IEEE PES General Meeting, Montreal, Canada, Aug. 2-6, 2020, pp. 1-5.
  5. C. Jia, W. Qiao, and L. Qu, “A cost-oriented control strategy for energy management of a dual-mode locomotive,” in Proc. 2019 IEEE Vehicle Power and Propulsion Conference (VPPC 2019), Hanoi, Vietnam, Oct. 14-17, 2019, pp. 1-6.
  6. J. Liu, H. Zhang, W. Qiao, and L. Qu, “DC (optimal) power flow-based models for simulation and mitigation of overload cascading failures,” in Proc. 51th North American Power Symposium (NAPS 2019), Wichita, KS, USA, Oct. 13-15, 2019, pp. 1-5.
  7. H. Zhang, J. Liu, D. Xiao, and W. Qiao, “Security-constrained optimal power flow solved with a dynamic multichain particle swarm optimizer,” in Proc. 51th North American Power Symposium (NAPS 2019), Wichita, KS, USA, Oct. 13-15, 2019, pp. 1-6.
  8. L. He, L. Hao, and W. Qiao, “Remote monitoring and diagnostics of pitch bearing defects in a MW-scale wind turbine using pitch symmetrical-component analysis,” in Proc. 2019 IEEE Energy Conversion Congress and Exposition (ECCE 2019), Baltimore, MD, USA, Sept. 29-Oct. 3, 2019, pp. 1-6.
  9. J. Cui, L. Qu, and W. Qiao, “A single-phase electromagnetic transformer with an adjustable output voltage,” in Proc. 2019 IEEE Energy Conversion Congress and Exposition (ECCE 2019), Baltimore, MD, USA, Sept. 29-Oct. 3, 2019, pp. 6122-6125.
  10. C. Entzminger, W. Qiao, L. Qu, and J. L. Hudgins, “A high-accuracy, low-order thermal model of SiC MOSFET power modules extracted from finite element analysis via model order reduction,” in Proc. 2019 IEEE Energy Conversion Congress and Exposition (ECCE 2019), Baltimore, MD, USA, Sept. 29-Oct. 3, 2019, pp. 4950-4954.
  11. Lizhi Qu, Liyan Qu, W. Qiao, and Z. Zhang, “Zero voltage vector selection in a saturation controller-based direct torque control for permanent-magnet synchronous motors,” in Proc. 2019 IEEE Energy Conversion Congress and Exposition (ECCE 2019), Baltimore, MD, USA, Sept. 29-Oct. 3, 2019, pp. 4528-4533.
  12. Lizhi Qu, Liyan Qu, and W. Qiao, “A linear active disturbance rejection controller-based sensorless control scheme for PMSM drives,” in Proc. 2019 IEEE Energy Conversion Congress and Exposition (ECCE 2019), Baltimore, MD, USA, Sept. 29-Oct. 3, 2019, pp. 792-797.
  13. H. Zhang, D. Xiao, J. Liu, and W. Qiao, “Security-constrained optimal power flow solved with a hybrid multiswarm particle swarm optimizer,” in Proc. IEEE PES General Meeting 2019, Atlanta, GA, USA, Aug. 4-8, 2019, pp. 1-5.
  14. C. Jia, W. Qiao, and L. Qu, “Numerical methods for optimal control of hybrid electric agricultural tractors,” in Proc. IEEE Transportation Electrification Conference and Expo (ITEC 2019), Novi, MI, USA, Jun. 19-21, 2019, pp. 1-6.
  15. L. He, L. Hao, D. Pan, and W. Qiao, “Detection of single-axis pitch bearing defect in a wind turbine using electrical signature analysis,” in Proc. IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA, May 12-15, 2019.
  16. L. He, J. Unnikrishnan, L. Hao, B. Matthews, and W. Qiao, “Enhanced wind turbine main drivetrain gearbox and bearing monitoring and diagnostics via information of acoustic, electrical, and vibration signatures,” in Proc. IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA, May 12-15, 2019.
  17. J. C. do Prado, W. Qiao, and S. Thomas, “Moving towards distribution system operators: Current work and future directions,” in Proc. 10th IEEE Conference on Innovative Smart Grid Technology (ISGT 2019), Washington, DC, USA, Feb. 17-20, 2019, pp. 1-5.
  18. D. Xiao, W. Qiao, and L. Qu, “Risk-averse offer strategy of a photovoltaic solar power plant with virtual bidding in electricity markets,” in Proc. 10th IEEE Conference on Innovative Smart Grid Technology (ISGT 2019), Washington, DC, USA, Feb. 17-20, 2019, pp. 1-5.
  19. M. Penne, W. Qiao, and J. L. Hudgins, “Converting waste vehicle aerodynamic energy into electricity,” in Proc. 2018 IEEE Energy Conversion Congress and Exposition (ECCE 2018), Portland, OR, USA, Sept. 23-27, 2018, pp. 416-422.
  20. J. Cui, L. Qu, and W. Qiao, “A three-phase adjustable-voltage-ratio transformer based on magnetic flux valves,” in Proc. 2018 IEEE Energy Conversion Congress and Exposition (ECCE 2018), Portland, OR, USA, Sept. 23-27, 2018, pp. 758-762.
  21. X. Jin, Z. Que, Y. Sun, Y. Guo, and, W. Qiao, “A data-driven approach for bearing fault prognositics,” in Proc. IEEE Industry Applications Society Annual Meeting, Portland, OR, USA, Sept. 23-27, 2018, pp. 1-8.
  22. J. C. do Prado, H. Vakilzadian, W. Qiao, and D. P. F. Möller, “Stochastic distribution system market clearing and settlement via sample average approximation,” in Proc. 50th North American Power Symposium (NAPS 2018), Fargo, ND, USA, Sept. 9-11, 2018, pp. 1-6.
  23. M. K. AlAshery and W. Qiao, “Risk management via multiple risk measures,” in Proc. 50th North American Power Symposium (NAPS 2018), Fargo, ND, USA, Sept. 9-11, 2018, pp. 1-6.
  24. C. Jia, W. Qiao, and L. Qu, “Modeling and control of hybrid electric vehicles: A case study for agricultural tractors,” in Proc. 2018 IEEE Vehicle Power and Propulsion Conference (VPPC 2018), Chicago, IL, USA, Aug. 27-30, 2018, pp. 1-6.
  25. M. K. AlAshery and W. Qiao, “Risk management via multiple risk measures,” in Proc. IEEE PES General Meeting 2018, Portland, OR, USA, Aug. 5-10, 2018, pp. 1-5.
  26. D. Xiao, W. Qiao, and L. Qu, “Risk-constrained stochastic virtual bidding in two-settlement electricity markets,” in Proc. IEEE PES General Meeting 2018, Portland, OR, USA, Aug. 5-10, 2018, pp. 1-5.
  27. J. C. do Prado and W. Qiao, “A vision of the next-generation retail electricity market in the context of distributed energy resources,” in Proc. 9th IEEE Conference on Innovative Smart Grid Technology (ISGT 2018), Washington, DC, USA, Feb. 19-22, 2018, pp. 1-5.
  28. F. Chen, H. Wang, W. Qiao, and L. Qu, “A grid-tied reconfigurable battery storage system,” in Proc. 33rd Annual IEEE Applied Power Electronics Conference & Exposition (APEC 2018), San Antonio, TX, USA, Mar. 4-8, 2018, pp. 645-652.
  29. J. Cui, H. Wang, L. Qu, and W. Qiao, “A tunable inductor based on a magnetic flux valve,” in Proc. 2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017), Cincinnati, OH, USA, Oct. 1-5, 2017, pp. 3255-3259.
  30. J. Wang, W. Qiao, and L. Qu, “Wind turbine bearing fault diagnosis based on sparse representation of condition monitoring signals,” in Proc. 2017 IEEE Energy Conversion Congress and Exposition (ECCE 2017), Cincinnati, OH, USA, Oct. 1-5, 2017, pp. 3696-3702.
  31. F. Cheng, J. Wang, L. Qu, and W. Qiao, “Rotor current-based fault diagnosis for DFIG wind turbine drivetrain gearboxes using frequency analysis and a deep classifier,” in Proc. IEEE Industry Applications Society Annual Meeting, Cincinnati, OH, USA, Oct. 1-5, 2017, pp. 1-9.
  32. Y. Peng, W. Qiao, L. Qu, and J. Wang, “Sensor fault detection and isolation for a wireless sensor network-based remote wind turbine condition monitoring system,” in Proc. IEEE Industry Applications Society Annual Meeting, Cincinnati, OH, USA, Oct. 1-5, 2017, pp. 1-7.
  33. J. Liu, W. Qiao, and L. Qu, “A time delay model of the wide area monitoring and control system,” in Proc. 49th North American Power Symposium (NAPS 2017), Morgantown, WV, USA, Sept. 17-19, 2017, pp. 1-6.
  34. Y. Peng, F. Cheng, W. Qiao, and L. Qu, “Fault prognosis of drivetrain gearbox based on a recurrent neural network,” in Proc. 16th Annual IEEE International Conference on Electro Information Technology (EIT 2017), Lincoln, NE, USA, May 14-17, 2017, pp. 593-599.
  35. H. Li, L. Qu, and W. Qiao, “Life-cycle cost analysis for wind power converters,” in Proc. 16th Annual IEEE International Conference on Electro Information Technology (EIT 2017), Lincoln, NE, USA, May 14-17, 2017, pp. 630-634.
  36. C. Wei, W. Qiao, and T. Kim, “Low-voltage ride-through performance and sensorless vector controlled doubly-fed induction generators,” in Proc. 16th Annual IEEE International Conference on Electro Information Technology (EIT 2017), Lincoln, NE, USA, May 14-17, 2017, pp. 530-534.
  37. A. Adhikaree, H. Makani, J. Yun, W. Qiao, and T. Kim, “Internet of things-enabled multiagent system for residential DC microgrid,” in Proc. 16th Annual IEEE International Conference on Electro Information Technology (EIT 2017), Lincoln, NE, USA, May 14-17, 2017, pp. 100-104.
  38. F. Chen, W. Qiao, and L. Qu, “A scalable and reconfigurable battery system,” in Proc. IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2017), Florianopolis, Brazil, Apr. 17-20, 2017, 6 pages.
  39. H. Li, L. Qu, W. Qiao, and C. Wei, “Current and rotor position sensor fault detection and isolation for permanent magnet synchronous generators in wind applications,” in Proc. 32nd Annual IEEE Applied Power Electronics Conference & Exposition (APEC 2017), Tampa, FL, USA, Mar. 26-30, 2017, pp. 2810-2815.
  40. F. Chen, W. Qiao, and L Qu, “A modular and reconfigurable battery system,” in Proc. 32nd Annual IEEE Applied Power Electronics Conference & Exposition (APEC 2017), Tampa, FL, USA, Mar. 26-30, 2017, pp. 2131-2135.
  41. Q. Hui, W. Qiao, and C. Peng, “Neuromorphic-computing-based feedback control: A cognitive supervisory control framework,” in Proc. 55th IEEE Conference on Decision and Control, Las Vegas, NV, USA, Dec. 12-14, 2016, pp. 1675-1680.
  42. X. Jin, F. Cheng, Y. Peng, W. Qiao, and L. Qu, “A comparative study on vibration- and current-based approaches for drivetrain gearbox fault diagnosis,” in Proc. IEEE Industry Applications Society Annual Meeting, Portland, OR, USA, Oct. 2-6, 2016, pp. 1-8.
  43. F. Cheng, Y. Peng, L. Qu, and W. Qiao, “Current-based fault detection and identification for wind turbine drivetrain gearboxes,” in Proc. IEEE Industry Applications Society Annual Meeting, Portland, OR, USA, Oct. 2-6, 2016, pp. 1-9.
  44. Y. Peng, W. Qiao, and L. Qu, “Gearbox fault diagnosis using vibration and current information fusion,” in Proc. 2016 IEEE Energy Conversion Congress and Exposition (ECCE 2016), Milwaukee, MI, USA, Sept. 18-22, 2016, pp. 1-6.
  45. H. Wang, L. Qu, and W. Qiao, “A compact single-phase adjustable-voltage-ratio magneto-electric transformer,” in Proc. 2016 IEEE Energy Conversion Congress and Exposition (ECCE 2016), Milwaukee, MI, USA, Sept. 18-22, 2016, pp. 1-4.
  46. F. Cheng, C. Wei, L. Qu, and W. Qiao, “Fault diagnosis of wind turbine gearbox using DFIG stator current analysis,” in Proc. 2016 IEEE Energy Conversion Congress and Exposition (ECCE 2016), Milwaukee, MI, USA, Sept. 18-22, 2016, pp. 1-7.
  47. F. Chen and W. Qiao, “A general space vector PWM scheme for multilevel inverters,” in Proc. 2016 IEEE Energy Conversion Congress and Exposition (ECCE 2016), Milwaukee, MI, USA, Sept. 18-22, 2016, pp. 1-6.
  48. H. Li, L. Qu, W. Qiao, and C. Wei, “Current/voltage sensor fault detection and isolation in wind energy conversion systems based on power balance,” in Proc. 2016 IEEE Energy Conversion Congress and Exposition (ECCE 2016), Milwaukee, MI, USA, Sept. 18-22, 2016, pp. 1-6.
  49. J. Wang, Y. Peng, and W. Qiao, “Bearing fault diagnosis of direct-drive wind turbines based on multiscale filtering spectrum,” in Proc. 2016 IEEE Energy Conversion Congress and Exposition (ECCE 2016), Milwaukee, MI, USA, Sept. 18-22, 2016, pp. 1-8.
  50. Y. Peng, S. Asgarpoor, W. Qiao, and E. Foruzan, “Fuzzy cost-based FMECA for wind turbines considering condition monitoring systems,” in Proc. 48th North American Power Symposium (NAPS 2016), Denver, CO, USA, Sept. 18-20, 2016, pp. 1-6.
  51. Z. Wang, W. Qiao, and L. Qu, “Real-time junction temperature estimation for IGBT modules using low-order digital filters,” in Proc. 8th International Power Electronics and Motion Control Conference 2016 – ECEC Asia (IPEMC 2016–ECCE Asia), Hefei, China, May 22-25, 2016, pp. 1-5.
  52. C. Wei, Z. Zhang, W. Qiao, and L. Qu, “Saturation controller-based direct power control for doubly-fed induction generator,” in Proc. 31st Annual IEEE Applied Power Electronics Conference & Exposition (APEC 2016), Long Beach, CA, USA, Mar. 20-24, 2016, pp. 3514-3520.
  53. X. Jin, Y. Peng, F. Cheng, W. Qiao, and L. Qu, “Quantitative evaluation of wind turbine faults under variable operational conditions,” in Proc. IEEE Industry Applications Society Annual Meeting, Dallas, TX, USA, Oct. 18-22, 2015, pp. 1-8.
  54. F. Cheng, L. Qu, and, W. Qiao, “A case-based data-driven prediction framework for machine fault prognostics,” in Proc. IEEE Energy Conversion Congress and Exposition 2015 (ECCE 2015), Montreal, Canada, Sept. 20-24, 2015, pp. 3957-3963.
  55. J. Zeng, W. Qiao, C. Wei, and L. Qu, “A soft-switched three-port single-state inverter for photovoltaic-battery systems,” in Proc. IEEE Energy Conversion Congress and Exposition 2015 (ECCE 2015), Montreal, Canada, Sept. 20-24, 2015, pp. 4568-4573.
  56. T. Kim, W. Qiao, and L. Qu, “Hysteresis modeling for model-based condition monitoring of lithium-ion batteries,” in Proc. IEEE Energy Conversion Congress and Exposition 2015 (ECCE 2015), Montreal, Canada, Sept. 20-24, 2015, pp. 5068-5073.
  57. C. Wei, Z. Zhang, J. Zeng, and W. Qiao, “Stator current-based sliding mode observer for sensorless vector control of doubly-fed induction generators,” in Proc. IEEE Energy Conversion Congress and Exposition 2015 (ECCE 2015), Montreal, Canada, Sept. 20-24, 2015, pp. 4165-4171.
  58. Y. Zhao and W. Qiao, “Enhanced rotor position/speed observer for sensorless control of salient-pole permanent-magnet synchronous machines,” in Proc. IEEE Energy Conversion Congress and Exposition 2015 (ECCE 2015), Montreal, Canada, Sept. 20-24, 2015, pp. 860-866.
  59. T. Kim, J. Yun, and W. Qiao, “A multiagent system for residential DC microgrids,” in Proc. 2015 IEEE PES General Meeting, Denver, CO, USA, July 26-30, 2015, pp. 1-5.
  60. T. Kim, W. Qiao, and Y. Zhao, “Sliding-mode observer-based sensorless direct power control of DFIGs for wind power applications,” in Proc. 2015 IEEE PES General Meeting, Denver, CO, USA, July 26-30, 2015, pp. 1-5.
  61. J. Zeng, W. Qiao, and L. Qu, “Modeling and control of a three-port DC-DC converter for PV-battery systems,” in Proc. 29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2015), Charlotte, NC, USA, Mar. 15-19, 2015, pp. 1768-1773.
  62. Z. Zhang, Y. Zhao, J. Zeng, and W. Qiao, “A discrete-time direct torque control for salient-pole permanent-magnet synchronous generators based on flux space vectors,” in Proc. IEEE Energy Conversion Congress and Exposition 2014 (ECCE 2014), Pittsburgh, PA, USA, Sept. 14-18, 2014, pp. 1515-1521.
  63. D. Lu and W. Qiao, “A GA/SVM hybrid classifier for multiclass fault identification of drivetrain gearboxes,” in Proc. IEEE Energy Conversion Congress and Exposition 2014 (ECCE 2014), Pittsburgh, PA, USA, Sept. 14-18, 2014, pp. 3894-3900.
  64. J. Zeng, W. Qiao, and L. Qu, “An isolated multiport bidirectional DC-DC converter for PV-battery-DC microgrid applications,” in Proc. IEEE Energy Conversion Congress and Exposition 2014 (ECCE 2014), Pittsburgh, PA, USA, Sept. 14-18, 2014, pp. 4978-4984.
  65. C. Wei, Z. Zhang, W. Qiao, and L. Qu, “Intelligent maximum power extraction control for wind energy conversion systems based on online Q-learning with function approximation,” in Proc. IEEE Energy Conversion Congress and Exposition 2014 (ECCE 2014), Pittsburgh, PA, USA, Sept. 14-18, 2014, pp. 4911-4916.
  66. Z. Wang, W. Qiao, and L. Qu, “Frequency-domain transient temperature estimation and aging analysis for weak points of IGBT modules,” in Proc. IEEE Energy Conversion Congress and Exposition 2014 (ECCE 2014), Pittsburgh, PA, USA, Sept. 14-18, 2014, pp. 4036-4042.
  67. D. Lu and W. Qiao, “Fault diagnosis for drivetrain gearboxes using PSO-optimized multiclass SVM classifier,” in Proc. IEEE PES General Meeting 2014, Washington, DC, USA, July 27-31, 2014, pp. 1-5.
  68. C. Wei and W. Qiao, “Evaluation of ANN estimation-based MPPT control for a DFIG wind turbine,” in Proc. 2014 IEEE Symposium on Power Electronics and Machines for Wind and Water Applications (PEMWA 2014), Milwaukee, WI, USA, July 24-26, 2014, pp. 1-6.
  69. T. Kim, Y. Wang, Z. Sahinoglu, T. Wada, S. Hara, and W. Qiao, “Fast UD factorization-based RLS online parameter identification for model-based condition monitoring of Lithium-ion batteries,” in Proc. 2014 American Control Conference (ACC 2014), Portland, OR, USA, June 4-6, 2014, pp. 4410-4415.
  70. T. Kim, Y. Wang, Z. Sahinoglu, T. Wada, S. Hara, and W. Qiao, “State of charge estimation based on a real-time battery model and iterative smooth variable structure filter,” in Proc. 2014 IEEE Innovative Smart Grid Technologies Conference - Asia (ISGT-ASIA 2014), Kuala Lumpur, Malaysia, May 20-23, 2014, pp. 132-137.
  71. B. Tian, W. Qiao, Z. Wang, T. Gachovska, and J. L. Hudgins, “Monitoring IGBT’s health condition via junction temperature variations,” in Proc. 29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2014), Fort Worth, TX, USA, Mar. 16-20, 2014, pp. 2550-2555.
  72. B. Tian, Z. Wang, W. Qiao, and L. Qu, “Study on case temperature distribution for condition monitoring of multidie IGBT modules,” in Proc. 29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2014), Fort Worth, TX, USA, Mar. 16-20, 2014, pp. 2564-2568.
  73. Z. Wang, W. Qiao, B. Tian, and L. Qu, “An effective heat propagation path-based online adaptive thermal model for power IGBT modules,” in Proc. 29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2014), Fort Worth, TX, USA, Mar. 16-20, 2014, pp. 513-518.
  74. Z. Zhang, W. Qiao, and L. Qu, “Saturation controller-based ripple reduction for direct torque controlled permanent magnet synchronous machines,” in Proc. 29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2014), Fort Worth, TX, USA, Mar. 16-20, 2014, pp. 799-805.
  75. J. Zeng, W. Qiao, and L. Qu, “An isolated three-port bidirectional DC-DC converter for photovoltaic systems with energy storage,” in Proc. IEEE IAS 48th Annual Meeting, Orlando, FL, USA, Oct. 6-11, 2013, pp. 1-8.
  76. Y. Zhao, W. Qiao, and L. Wu, “Sensorless control of surface-mounted permanent-magnet synchronous machines for low-speed operation based on high-frequency square-wave voltage injection,” in Proc. IEEE IAS 48th Annual Meeting, Orlando, FL, USA, Oct. 6-11, 2013, pp. 1-8.
  77. Z. Zhang and W. Qiao, “A discrete-time direct-torque and flux control for direct-drive PMSG wind turbines,” in Proc. IEEE IAS 48th Annual Meeting, Orlando, FL, USA, Oct. 6-11, 2013, pp. 1-8.
  78. T. Kim, W. Qiao, and L. Qu, “Online SOC and SOH estimation for multicell lithuim-ion batteries based on an adaptive hybrid battery model and sliding-mode observer,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 292-298.
  79. Y. Zhao, W. Qiao, and L. Wu, “An extended flux model-based rotor position estimator for sensorless control of interior permanent magnet synchronous machines,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 3799-3806.
  80. Y. Zhao, W. Qiao, and L. Wu, “Stability and dynamic performance improvement of a sensorless IPMSM drive via adaptive estimated-speed-assisted position prediction and current quality evaluation,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 3473-3480.
  81. X. Gong and W. Qiao, “Current-based eccentricity detection for direct-drive wind turbines via synchronous sampling,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 2972-2976.
  82. J. Zeng, W. Qiao, and L. Qu, “A LCL-resonant isolated multiport DC-DC converter for power management of multiple renewable energy sources,”
    in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 2347-2354.
  83. J. Zeng, W. Qiao, and L. Qu, “A single-switch LCL-resonant isolated DC-DC converter,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 5496-5502.
  84. D. Lu and W. Qiao, “Adaptive feature extraction and SVM classification for real-time fault diagnosis of drivetrain gearboxes,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 3934-3940.
  85. T. Gachovska, B. Tian, J. Hudgins, W. Qiao, and J. Donlon, “A real-time thermal model for monitoring of power semiconductor devices,” in Proc. IEEE Energy Conversion Congress and Exposition 2013 (ECCE 2013), Denver, CO, USA, Sept. 15-19, 2013, pp. 2208-2213.
  86. J. Cervantes, T. Dai, and W. Qiao, “Optimal wind power penetration in the real-time energy market operation,” in Proc. IEEE PES General Meeting 2013, Vancouver, British Columbia, Canada, July 21-25, 2013, pp. 1-5.
  87. Y. Jiao and W. Qiao, “A hierarchical power management strategy for multiple single-phase roadway microgrids,” in Proc. IEEE PES General Meeting 2013, Vancouver, British Columbia, Canada, July 21-25, 2013, pp. 1-5.
  88. D. Lu, W. Qiao, X. Gong, and L. Qu, “Current-based fault detection for wind turbine systems via Hilbert-Hung transform,” in Proc. IEEE PES General Meeting 2013, Vancouver, British Columbia, Canada, July 21-25, 2013, pp. 1-5.
  89. J. Zeng, D. Lu, Y. Zhao, Z. Zhang, W. Qiao, and X. Gong, “Wind turbine fault detection and isolation using support vector machines and residual-based method,” in Proc. 2013 American Control Conference (ACC 2013), Washington, DC, June 17-19, 2013, pp. 3661-2666.
  90. Y. Zhao, W. Qiao, and L. Wu, “Model adaptive reference system-based speed estimators for sensorless control of interior permanent magnet synchronous machines,” in Proc. 2013 IEEE Transportation Electrification Conference and Expo (ITEC 2013), Detroit, MI, USA, June 16-19, 2013, pp. 1-6.
  91. D. Lu and W. Qiao, “Frequency demodulation-aided condition monitoring for drivetrain gearboxes,” in Proc. 2013 IEEE Transportation Electrification Conference and Expo (ITEC 2013), Detroit, MI, USA, June 16-19, 2013, pp. 1-6.
  92. T. Kim, W. Qiao, and L. Qu, “Online state of charge and electrical impedance estimation for multicell lithuim-ion batteries,” in Proc. 2013 IEEE Transportation Electrification Conference and Expo (ITEC 2013), Detroit, MI, USA, June 16-19, 2013, pp. 1-6.
  93. T. Kim, W. Qiao, and L. Qu, “Real-time state of charge and electrical impedance estimation for lithium-ion batteries based on a hybrid battery model,” in Proc. 28th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2013), Long Beach, CA, USA, Mar. 17-21, 2013, pp. 563-568.
  94. Y. Zhao, W. Qiao, and L. Wu, “An adaptive quasi-sliding-mode observer-based sensorless drive for heavy-duty interior permanent magnet synchronous machines,” in Proc. 28th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2013), Long Beach, CA, USA, Mar. 17-21, 2013, pp. 781-788.
  95. Y. Zhao, W. Qiao, and L. Wu, “Dead-time effect and current regulation quality analysis for a sliding-mode position observer-based sensorless IPMSM drives,” in Proc. IEEE IAS 47th Annual Meeting, Las Vegas, NV, USA, Oct. 7-11, 2012, pp. 1-7.
  96. J. Zeng, Z. Zhang, and W. Qiao, “An interconnection-damping-assignment passivity-based controller for a DC-DC boost converter with a constant power load,” in Proc. IEEE IAS 47th Annual Meeting, Las Vegas, NV, USA, Oct. 7-11, 2012, pp. 1-7.
  97. Z. Zhang, Y. Zhao, W. Qiao, and L. Qu, “A space-vector modulated sensorless direct-torque control for direct-drive PMSG wind turbines,” in Proc. IEEE IAS 47th Annual Meeting, Las Vegas, NV, USA, Oct. 7-11, 2012, pp. 1-7.
  98. D. Lu, X. Gong, and W. Qiao, “Current-based diagnosis for gear tooth breaks in wind turbine gearboxes,” in Proc. IEEE Energy Conversion Congress and Exposition 2012 (ECCE 2012), Raleigh, NC, USA, Sept. 15-20, 2012, pp. 3780-3786. (First Prize of the 2012 Best Paper Awards of the IEEE IAS Renewable and Sustainable Energy Conversion Systems Committee)
  99. J. Zeng, W. Qiao, and L. Qu, “An isolated multiport DC-DC converter for simultaneous power management of multiple renewable energy sources,” in Proc. IEEE Energy Conversion Congress and Exposition 2012 (ECCE 2012), Raleigh, NC, USA, Sept. 15-20, 2012, pp. 3741-3748.
  100. J. Zeng, W. Qiao, and L. Qu, “A single-switch isolated DC-DC converter for photovoltaic systems,” in Proc. IEEE Energy Conversion Congress and Exposition 2012 (ECCE 2012), Raleigh, NC, USA, Sept. 15-20, 2012, pp. 3446-3452.
  101. Y. Zhao, W. Qiao, and L. Wu, “Sensorless control for interior permanent magnet synchronous machines based on a multilayer discrete-time sliding-mode observer,” in Proc. IEEE Energy Conversion Congress and Exposition 2012 (ECCE 2012), Raleigh, NC, USA, Sept. 15-20, 2012, pp. 1788-1795.
  102. Y. Zhao, W. Qiao, and L. Wu, “Estimated-speed-aided stabilizers for sensorless control of interior permanent magnet synchronous machines,” in Proc. IEEE Energy Conversion Congress and Exposition 2012 (ECCE 2012), Raleigh, NC, USA, Sept. 15-20, 2012, pp. 2631-2638.
  103. W. Qiao, “Intelligent mechanical sensorless MPPT control for wind energy systems,” in Proc. IEEE PES General Meeting 2012, San Diego, CA, USA, July 22-27, 2012, pp. 1-8. (Panel Paper)
  104. X. Gong and W. Qiao, “Current-based online bearing fault diagnosis for direct-drive wind turbines via spectrum analysis and impulse detection,” in Proc. 2012 IEEE Symposium on Power Electronics and Machines in Wind Applications (PEMWA 2012), Denver, CO, USA, July 16-18, 2012, pp. 1-6.
  105. Y. Zhao, W. Qiao, and L. Wu, “Oscillation mitigation for sliding mode observers in sensorless control of interior permanent magnet synchronous machines,” in Proc. 2012 IEEE Transportation Electrification Conference and Expo (ITEC 2012), Dearborn, MI, USA, June 18-20, 2012, pp. 1-6. (ITEC 2012 Best Paper Award)
  106. Y. Zhao, W. Qiao, and L. Wu, “Position extraction from a sliding-mode observer for sensorless control of IPMSMs,” in Proc. 21st IEEE International Symposium on Industrial Electronics (ISIE 2012), Hangzhou, China, May 28-31, 2012, pp. 725-730.
  107. T. Dai, W. Qiao, and L. Qu, “Real-time optimal participation of wind power in the electricity market,” in Proc. 2012 IEEE Innovative Smart Grid Technologies Conference - Asia (IEEE PES ISGT-ASIA 2012), Tianjin, China, May 21-24, 2012, pp. 1-6.
  108. Y. Zhao, W. Qiao, and L. Wu, “Compensation algorithms for sliding mode observers in sensorless control of IPMSMs,” in Proc. 2012 IEEE International Electrical Vehicle Conference (IEVC 2012), Greenville, SC, USA, Mar. 4-8, 2012, pp. 1-7.
  109. T. Kim, W. Qiao, and L. Qu, “A multicell battery system design for electric and plug-in hybrid electric vehicles,” in Proc. 2012 IEEE International Electrical Vehicle Conference (IEVC 2012), Greenville, SC, USA, Mar. 4-8, 2012, pp. 1-7.
  110. T. Kim, W. Qiao, and L. Qu, “A series-connected self-reconfigurable multicell battery capable of safe and effective charging/discharging and balancing operations,” in Proc. 27th Annual IEEE Applied Power Electronics Conference and Exposition (APEC 2012), Orlando, FL, USA, Feb. 5-9, 2012, pp. 2259-2264.
  111. Y. Zhao and W. Qiao, “A third-order sliding-mode controller for DC/DC converters with constant power loads,” in Proc. IEEE IAS 46th Annual Meeting, Orlando, FL, USA, Oct. 9-13, 2011, pp. 1-8.
  112. C. Lohmeier, J. Zeng, W. Qiao, L. Qu, and J. L. Hudgins, “A current-sensorless MPPT quasi-double-boost converter for PV systems,” in Proc. IEEE Energy Conversion Congress and Exposition 2011 (ECCE 2011), Phoenix, AZ, USA, Sept. 17-22, 2011, pp. 1069-1075.
  113. X. Gong and W. Qiao, “Bearing fault detection for direct-drive wind turbine via stator current spectrum analysis,” in Proc. IEEE Energy Conversion Congress and Exposition 2011 (ECCE 2011), Phoenix, AZ, USA, Sept. 17-22, 2011, pp. 313-318.
  114. T. Kim, W. Qiao, and L. Qu, “Self-reconfigurable multicell batteries,” in Proc. IEEE Energy Conversion Congress and Exposition 2011 (ECCE 2011), Phoenix, AZ, USA, Sept. 17-22, 2011, pp. 3549-3555.
  115. T. Dai and W. Qiao, “Optimal participation of wind power in the liberalized power market,” in Proc. 18th IFAC World Congress, Milano, Italy, Aug. 28-Sept. 2, 2011, pp. 3695-3700.
  116. B. Dong, S. Asgarpoor, and W. Qiao, “ANN-based adaptive PI control for wind turbine with doubly fed induction generator,” in Proc. 43rd North American Power Symposium, Boston, MA, USA, Aug. 4-6, 2011.
  117. W. Qiao, A. Sharma, J.L. Hudgins, E. Jones, and L. Rilett, “Wind/solar hybrid generation-based roadway microgrids,” in Proc. IEEE PES General Meeting 2011, Detroit, MI, USA, July 24-29, 2011 (Invited Panel Paper).
  118. J. Zeng and W. Qiao, “Short-term solar power prediction using an RBF neural network,” in Proc. IEEE PES General Meeting 2011, Detroit, MI, USA, July 24-29, 2011.
  119. W. Qiao, J. Liang, R. G. Harley, and G.K. Venayagamoorthy, “Computational intelligence for control of wind turbine generators,” in Proc. IEEE PES General Meeting 2011, Detroit, MI, USA, July 24-29, 2011 (Invited Panel Paper).
  120. J. Mitra, M.-Y. Chow, S. Kamalasadam, W. Qiao, A.K. Srivastava, S.K. Srivastava, and G.K. Venayagamoorthy, “Intelligent methods for smart microgrids,” in Proc. IEEE PES General Meeting 2011, Detroit, MI, USA, July 24-29, 2011 (Invited Panel Paper).
  121. J. Zeng and W. Qiao, “Support vector machine-based short-term wind power forecasting,” in Proc. 2011 IEEE PES Power System Conference & Exposition (PSCE 2011), Phoenix, AZ, USA, March 20-23, 2011.
  122. T. Kim, W. Qiao, and L. Qu, “Series-connected reconfigurable multicell battery,” in Proc. 2011 Applied Power Electronics Conference and Exposition (APEC 2011), Fort Worth, TX, USA, Mar. 6-10, 2011, pp. 1382-1387.
  123. X. Gong, W. Qiao, and W. Zhou, “Incipient bearing fault detection via wind generator stator current and wavelet filter,” in Proc. 36th Annual Conference of the IEEE Industrial Electronics Society (IECON 2010), Phoenix, AZ, USA, Nov. 7-10, 2010, pp. 2615-2620.
  124. T. Kim, W. Qiao, and L. Qu, “Series-connected reconfigurable multicell battery: A novel design towards smart batteries,” in Proc. IEEE Energy Conversion Congress and Exposition 2010 (ECCE 2010), Atlanta, GA, USA, Sept. 12-16, 2010, pp. 4257-4263.
  125. X. Yang, X. Gong, and W. Qiao, “Mechanical sensorless maximum power tracking control for direct-drive PMSG wind turbines,” in Proc. IEEE Energy Conversion Congress and Exposition 2010 (ECCE 2010), Atlanta, GA, USA, Sept. 12-16, 2010, pp. 4091-4098.
  126. X. Gong, X. Yang, and W. Qiao, “Wind speed and rotor position sensorless control for direct-drive PMG wind turbines,” in Proc. IEEE IAS 45th Annual Meeting, Houston, TX, USA, Oct. 3-7, 2010.
  127. Q. Hui, J. Shen, and W. Qiao, “Dynamic security analysis of electric power systems: passivity-based approach and positive invariance approach,” in Proc. 2010 ASME Dynamic Systems and Control Conference, Cambridge, MA, USA, Sept. 13-15, 2010, pp. 1-8.
  128. X. Gong and W. Qiao, “Simulation investigation of wind turbine imbalance faults,” in Proc. 2010 International Conference on Power System Technology (POWERCON2010), Hangzhou, China, Oct. 24-28, 2010.
  129. W. Qiao and Q. Hui, “Energy-based hybrid excitation control for synchronous generators,” in Proc. IEEE PES General Meeting 2010, Minneapolis, Minnesota, USA, July 25-29, 2010.
  130. D.J. Gardels, W. Qiao, and X. Gong, “Simulation studies on imbalance faults of wind turbines,” in Proc. IEEE PES General Meeting 2010, Minneapolis, Minnesota, USA, July 25-29, 2010.
  131. L. Qu and W. Qiao, “Constant power control and fault-ride-through enhancement of DFIG wind turbines with energy storage,” in Proc. IEEE IAS 44th Annual Meeting, Houston, TX, USA, Oct. 4-8, 2009.
  132. W. Qiao, X. Gong, and L. Qu, “Output maximization control for DFIG wind turbines without using wind and shaft speed measurements,” in Proc. IEEE Energy Conversion Congress and Exposition 2009 (ECCE 2009), San Jose, CA, USA, Sept. 20-24, 2009, pp. 404-410.
  133. Z. Jiang, F. Li, W. Qiao, H. Sun, H. Wan, J. Wang, Y. Xia, Z. Xu, and P. Zhang, “A vision of smart transmission grids,” in Proc. IEEE PES General Meeting 2009, Calgary, Alberta, Canada, July 26-30, 2009.
  134. J. Liang, W. Qiao, and R.G. Harley, “Direct transient control of wind turbine driven DFIG for low voltage ride-through,” in Proc. IEEE Symposium on Power Electronics and Machines in Wind Applications (PEMWA 2009), Lincoln, Nebraska, June 24-26, 2009.
  135. B. Dong, S. Asgarpoor, and W. Qiao, “Voltage analysis of distribution systems with DFIG wind turbines,” in Proc. IEEE Symposium on Power Electronics and Machines in Wind Applications (PEMWA 2009), Lincoln, Nebraska, June 24-26, 2009.
  136. W. Qiao, “Echo-state-network-based real-time wind speed estimation for wind power generation,” in Proc. 2009 International Joint Conference on Neural Networks (IJCNN 2009), Atlanta, GA, USA, June 14-19, 2009, pp. 2572-2579.
  137. Q. Hui and W. Qiao, “Stabilization of multimachine power systems via hybrid control,” in Proc. 2009 American Control Conference, St. Louis, MO, USA, June 10-12, 2009, pp. 2110-2115.
  138. W. Qiao, “Dynamic modeling and control of doubly fed induction generators driven by wind turbines,” in Proc. 2009 IEEE PES Power Systems Conference & Exposition (PSCE 2009), Seattle, WA, USA, Mar. 15-18, 2009.
  139. W. Qiao and R.G. Harley, “Grid connection requirements and solutions for DFIG wind turbines,” in Proc. IEEE Energy 2030 Conference, Atlanta, GA, USA, Nov. 17-18, 2008.
  140. W. Qiao and R.G. Harley, “Improved control of DFIG wind turbines for operation with unbalanced network voltages,” in Proc. IEEE IAS 43rd Annual Meeting, Edmonton, Alberta, Canada, Oct. 5-9, 2008.
  141. W. Qiao and R.G. Harley, “Effect of grid-connected DFIG wind turbines on power system transient stability,” in Proc. IEEE PES General Meeting 2008, Pittsburgh, PA, USA, July 20-24, 2008.
  142. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “Computational intelligence for control and grid integration of DFIG wind turbines,” in Proc. 7th International Workshop on Large Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Farms, Madrid, Spain, May 26-27, 2008.
  143. W. Qiao, L. Qu, and R.G. Harley, “Control of IPM synchronous generator for maximum wind power generation considering magnetic saturation,” in Proc. IEEE IAS 42nd Annual Meeting, New Orleans, LA, USA, Sept. 23-27, 2007, pp. 1265-1272. (IAS Industrial Automation and Control Committee Second Prize Paper Award)
  144. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “Dynamic modeling of wind farms with fixed-speed wind turbine generators,” in Proc. IEEE PES General Meeting 2007, Tampa, FL, USA, June 24-28, 2007.
  145. W. Qiao and R.G. Harley, “Power quality and dynamic performance improvement of wind farms using a STATCOM,” in Proc. 38th IEEE Power Electronics Specialists Conference (PESC 2007), Orlando, FL, USA, June 17-21, 2007, pp. 1832-1838.
  146. W. Qiao, G.K. Venayagamoorthy, and R.G. Harley, “DHP-based wide-area coordinating control of a power system with a large wind farm and multiple FACTS devices,” in Proc. 2007 International Joint Conference on Neural Networks (IJCNN 2007), Orlando, Florida, USA, Aug. 12-17, 2007, pp. 2093-2098.
  147. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “Neural-network-based intelligent control for improving dynamic performance of FACTS devices,” in Proc. IREP Symposium 2007 – Bulk Power System Dynamics and Control - VII, Charleston, SC, USA, Aug. 19-24, 2007.
  148. W. Qiao, G.K. Venayagamoorthy, and R.G. Harley, “Real-time implementation of a STATCOM on a wind farm equipped with doubly fed induction generators,” in Proc. IEEE IAS 41st Annual Meeting, Tampa, FL, USA, Oct. 8-12, 2006, pp. 1073-1080.
  149. W. Qiao and R.G. Harley, “Fault-tolerant optimal neurocontrol for a static synchronous series compensator connected to a power network,” in Proc. IEEE IAS 41st Annual Meeting, Tampa, FL, USA, Oct. 8-12, 2006, pp. 642-649.
  150. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “Effects of FACTS devices on a power system which includes a large wind farm,” in Proc. IEEE PES Power Systems Conference and Exposition (PSCE 2006), Atlanta, GA, USA, Oct. 29-Nov. 1, 2006, pp. 2070-2076.
  151. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “Fault-tolerant control for SSSC using neural networks and PSO,” in Proc. IEEE PES Power Systems Conference and Exposition (PSCE 2006), Atlanta, GA, USA, Oct. 29-Nov. 1, 2006, pp. 952-958.
  152. W. Qiao, G.K. Venayagamoorthy, and R.G. Harley, “Design of optimal PI controllers for doubly fed induction generators driven by wind turbines using particle swarm optimization,” in Proc. 2006 International Joint Conference on Neural Networks (IJCNN 2006), Vancouver, BC, Canada, July 16-21, 2006, pp. 1982-1986.
  153. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “A fault-tolerant P-Q decoupled control scheme for static synchronous series compensator,” in Proc. IEEE PES General Meeting 2006, Montreal, QC, Canada, June 18-22, 2006. (First Prize of the 2006 IEEE PES General Meeting Student Poster-Paper Contest)
  154. Z. Gao, W. Qiao, T.G. Habetler, and R.G. Harley, “Online compensation of detuning effects in vector control based on adaptive sensorless rotor thermal model identification,” in Proc. 37th IEEE Power Electronics Specialists Conference (PESC 2006), Jeju, Korea, June 18-22, 2006.
  155. B. Lu, W. Qiao, T.G. Habetler, and R.G. Harley, “Solving induction motor equivalent circuit using numerical methods for an in-service and nonintrusive motor efficiency estimation method,” in Proc. CES/IEEE 5th International Power Electronics and Motion Control Conference, Shanghai, P. R. China, Aug. 13-16, 2006.
  156. W. Qiao and R.G. Harley, “Optimization of radial basis function widths using particle swarm optimization,” in Proc. 2006 IEEE Swarm Intelligence Symposium, Indianapolis, Indiana, USA, May 12-14, 2006, pp. 55-60.
  157. S. Mohagheghi, Y. del Valle, W. Qiao, G.K. Venayagamoorthy, R.G. Harley, D.M. Falcao, G.N. Taranto, and T.M.L. Assis, “Steady state and transient behaviour of a fuzzy-based controlled STATCOM optimally placed in a 45 bus Brazilian power system,” in Proc. X SEPOPE Symposium of Specialists in Electric Operational and Expansion Planning, Florianopolis, SC, Brazil, May 21-25, 2006.
  158. W. Qiao and R.G. Harley, “An indirect adaptive external neuro-controller for series capacitive reactance compensator in damping power oscillations,” in Proc. 13th International Conference on Intelligent Systems Application to Power Systems (ISAP 2005), Washington, DC, USA, Nov. 6-10, 2005, pp. 234-239.
  159. W. Qiao and R.G. Harley, “Indirect adaptive internal neuro-control for a static synchronous series compensator (SSSC) connected to a power system,” in Proc. IEEE Industrial Electronics Society 31st Annual Conference (IECON 2005), Raleigh, NC, USA, Nov. 6-10, 2005, pp. 50-55.
  160. W. Qiao, Z. Gao, and R.G. Harley, “Continuous on-line identification of nonlinear Plants in power systems with missing sensor measurements,” in Proc. 2005 International Joint Conference on Neural Networks (IJCNN 2005), Montreal, Quebec, Canada, July 31-Aug. 4, 2005, pp. 1729-1734.
  161. W. Qiao and R.G. Harley, “On-line identification of series capacitive reactance compensator in a multi-machine power system using a radial basis function neural network,” in Proc. Inaugural IEEE PES 2005 Conference and Exposition in Africa, Durban, South Africa, July 11-15, 2005, pp. 287-292.
  162. G.K. Venayagamoorthy, Y. del Valle, S. Mohagheghi, W. Qiao, S. Ray, R.G. Harley, D.M. Falcao, G.N. Taranto, and T.M.L. Assis, “Effects of a STATCOM, a SCRC and a UPFC on the dynamic behavior of a 45 bus section of the Brazilian power system,” in Proc. Inaugural IEEE PES 2005 Conference and Exposition in Africa, Durban, South Africa, July 11-15, 2005, pp. 305-312.
  163. W. Qiao, R.G. Harley, and G.K. Venayagamoorthy, “On-line identification of static synchronous series compensator in a power system using a RBF neural network,” in Proc. 6th International Conference on Power Systems Operation and Planning, Praia, Cabo Verde, May 22-26, 2005, pp. 267-271.
  164. S. Mohagheghi, W. Qiao, G.K. Vanayagamoorthy, and R.G. Harley, “Supervisory level identifier for a multimachine power system using radial basis function neural networks,” in Proc. 6th International Conference on Power Systems Operation and Planning, Praia, Cabo Verde, May 22-26, 2005, pp. 134-138.

Patents:

  1. W. Qiao, J. Wang, and L. Qu, “Detecting faults in wind turbines,” U.S. Patent US10852214B2, Awarded on Dec. 1, 2020.
  2. W. Qiao, L. Qu, and H. Wang, “Electromagnetic power converter,” U.S. patent US10784041B2, Awarded on Sept. 22, 2020.
  3. W. Qiao and X. Gong, “Detecting faults in wind turbines,” U.S. Patent US10591519B2, Awarded on Mar. 17, 2020.
  4. W. Qiao, F. Chen, and L. Qu, “Scalable universal space vector pulse width modulation scheme for multilevel inverters,” U.S. Patent US10574154B1, Awarded on Feb. 25, 2020.
  5. W. Qiao and X. Gong, “Detecting faults in turbine generators,” U.S. Patent US10359473B2, Awarded on Jul. 23, 2019.
  6. L. Wu, Y. Zhao, and W. Qiao, “Methods of estimating a position of a rotor in a motor under transient and systems thereof,” U.S. Patent US10333439B2, Awarded on Jun. 25, 2019.
  7. W. Qiao, T. Kim, and L. Qu, “Rechargeable multicell battery,” U.S. Patent US10297855B2, Awarded on May 21, 2019.
  8. W. Qiao, Z. Wang, and L. Qu, “Monitoring aging of power semiconductor devices based on case temperature,” U.S. Patent US10288672B2, Awarded on May 14, 2019.
  9. W. Qiao, Z. Zhang, and L. Qu, “Direct torque control of AC electric machines,” U.S. Patent US9831812B2, Awarded on Nov. 28, 2017.
  10. L. Wu, Y. Zhao, and W. Qiao, “Methods of estimating a position of a rotor in a motor under transient and systems thereof,” U.S. Patent US9577555B2, Awarded on Feb. 21, 2017.
  11. L. Wu, Y. Zhao, and W. Qiao, “Drive systems including sliding mode observers and methods of controlling the same,” U.S. Patent US9088241B2, Awarded on Jul. 21, 2015.