Chika Nwankpa

DEGREES: PhD EE, Illinois Institute of Technology
PHONE: 215-895-2218
EMAIL: nwankpa @

Research keywords: power system dynamics, stochastic modeling, power electronic switching systems, optically controlled high power switches


Main research interests are in the areas of power systems and power electronics, specifically, the application of the theory of stochastic systems. Additional projects in power systems include large-scale power system computation by “emulation,” power system restoration, voltage stability assessment, power system load modeling, shipboard power system analysis and renewable power generation systems such as wind and solar generation. In power electronics projects include application of optically controlled high power switches in distribution systems (termed as Custom Power), modeling of basic power electronic circuitry and reconfigurable shipboard power system converters.

Recipient of the 1994 Presidential Faculty Fellow Award for “work in electrical and computer engineering.” Along with the award is a five-year research grant for studies on deregulation of power system operation and control as well as development of a new optically controlled high power switch and distribution system. The grant also fosters development of a new power engineering curricula. Recipient of the 1991 National Science Foundation (NSF) Engineering Research Initiation Award. The research grant from the award fostered studies in the search for “An On-Line Dynamic Security Index for Power System Contingency Selection.”

Sample Publications

S. P. Carullo and C.O. Nwankpa, “Interconnected Power Systems Laboratory: A Computer Automated Instructional Facility for Power System Experiments”, IEEE Transactions on Power Systems, Vol. 17, No. 2, May 2002, pp. 215-222.

Y. Liang and C. O. Nwankpa, “A Power-Line Conditioner Based on Flying-Capacitor Multilevel Voltage-Source Converter with Phase-Shift SPWM”, IEEE Transactions on Industry Applications Volume 36 Number 4, July/August 2000, pp. 965-971.

H. Mohammed and C. Nwankpa, “Stochastic Analysis and Simulation of Grid-Connected Wind Energy Conversion System”, IEEE Trans. On Energy Conversion Vol 15, No. 1, March 2000, pp. 85-90.

Y. Liang and C. O. Nwankpa, “A New Type of STATCOM Based on Cascading Voltage Source Inverters with Phase-Shifted Unipolar SPWM”, IEEE Transactions on Industry Application Volume 35 Number 5, September/October 1999, pp. 1118-1123.

M. Gravener and C. Nwankpa, “Available Transfer Capability and First Order Sensitivity”, IEEE Trans. on Power Systems , Vol. 13, No. 2, May 1999, pp. 512-518.

Y. Liang, C. Nwankpa and R. Fischl, A. DeVito and C. Readinger, “Dynamic Reactive Load Model”, IEEE Trans. on Power Systems, Nov. 1998, Vol. 13, pp. 1365-1372.

J. W. Schwartzenberg, C. O. Nwankpa, R. Fischl, A. Rosen, D. B. Gilbert and D. Richardson, “A Novel Laser Activated PIN Diode Switch for Power Applications”, IEEE Trans. on Electron Devices, July 1996, Vol. 43, No. 7, pp. 1061-1066..

S. P. Carullo, R. Bolkus, J. Hartle, J. Foy, C. O. Nwankpa, R. Fischl and J. Gillerman, “Interconnected Power System Laboratory: Fault Analysis Experiment”, IEEE Trans. on Power Systems, Vol. 11, No. 4, pp. 1913-1919, Nov. 1996.

H. G. Kwatny, R. Fischl and C. Nwankpa, “Local Bifurcations in Power Systems: Theory, Computation and Application,” Proceedings of the IEEE, Nov. 1995.

S. G. Casper and C. O. Nwankpa, “Bibiliography of Load Models for Power System Dynamic Performance” IEEE Trans. on Power Systems, Vol. No. 1, Feb., 1995, pp. 523-538.

S. Wunderlich, M. M. Adibi, R. Fischl and C. O. Nwankpa, “An Approach to standing phase angle reduction,” IEEE Trans. on Power Systems, Vol. 9, No. 1 pp. 470-478 February 1994.

C. O. Nwankpa and R.M. Hassan, “A Stochastic Based Voltage Collapse Indicator” IEEE Trans. on Power Systems, Vol. 8 No. 3, pp. 1187-1194, August 1993.

Drexel University Department of Electrical and Computer Engineering