Profile
Aaron is currently working on his PhD in Electrical Engineering and holds the position of Research Assistant in the Center for Electric Power Engineering at Drexel University. His industry experience consists of power systems, electronics and engineering management. Prior research concentrated on power electronics and currently his research at Drexel University is part of the ‘PowerGrid” project.
This goal of the PowerGrid project is to design and build a large scale emulator of an electrical power system which operates faster than real-time. There are analog and digital computation components of this project. Aaron’s research concentrates primarily on the analog side, specifically concentrating on component modeling and system control and integration.
Aaron has developed models for transmission lines and generators for the power system emulator. The transmission line models consist of two types, static and dynamic while the generator model is static. The static models are simpler and are used for load flow and contingency analysis in which only static solutions are required. The dynamic models are more complex and provide transient analysis in addition to the static solution. Once models are developed the analog power system emulator requires configuration, control, and evaluation while operating. The complexity of this problem increases with system size. Aaron is developing methods to achieve optimal configuration, control and measurement for this system.
Publications
A. St. Leger and C. Nwankpa, “Configuration of a Large Scale Analog Emulator for Power System Analysis,” Proceedings of the IEEE PowerTech 2007 Conference, /July 2007, Lausanne Switzerland.
J.C. Jimenez, A. St. Leger and C. Nwankpa, “Reconfigurable Phase Shifting Transformer for Analog Computation,” Proceedings of the IEEE PowerTech 2007 Conference, July 2007, Lausanne Switzerland.
V.Cecchi, A. St. Leger, K. Miu and C. Nwankpa, “Experimental Setup for Investigating Gamma Transmission Line Models in the Presence of Non-Fundamental Frequencies,” Proceedings of the IEEE Power Engineering
Society General Meeting, June 2007, Tampa, FL, USA.
A. St. Leger, J.C. Jimenez, A. Fu, S. Djimbinov, S.E. Soeurn, S.S. Lwin, and C. Nwankpa, “Analog Emulation of a Reconfigurable Tap Changing Transformer,” Proceedings of the 2007 International Symposium on Circuits and Systems (ISCAS 2007), May 27-30, 2007, New Orleans, USA.
A. St. Leger and C. Nwankpa, “Analog and Hybrid Computation Approaches for Static Power Flow,” Proceedings of the 40th Annual Hawaii International Conference on System Sciences, January, 2007, Waikoloa, HI, USA.
A. Deese, C. Nwankpa, and A. St.Leger, "Effect of System Size on Analog Emulation Based Steady-State Power Flow Analysis," Proceedings of
the 49th IEEE International Midwest Symposium on Circuits and Systems, 2006.
V. Cecchi, A. St. Leger, K. Miu and C. Nwankpa, “Loading Studies for Power Transmission Line Models in the Presence of Non-Fundamental Frequencies,” Proceedings of the 2007 Summer Computer Simulation Conference (SCSC ’07), July, 2007, San Diego, CA, USA.
C. Nwankpa, A. Deese, Q. Liu, A. St. Leger, J. Yakaski, and N. Yok, "Power System on a Chip (PSoC): Analog Emulation for Power System Applications," Power Engineering Society General Meeting, Montreal, Canada, June 18-22, 2006.
A. St. Leger and C. Nwankpa, "Static Generator Model for Analog Power Flow Computation," Proceedings of the 2006 International Symposium on Circuits and Systems (ISCAS 2006), Island of Kos, Greece, May 21-24, 2006.
C. Nwankpa, A. Deese, Q. Liu, A. St. Leger and J. Yakaski "Power System on a Chip (PSoC)," Proceedings of the 2006 International Symposium on Circuits and Systems (ISCAS 2006), Island of Kos, Greece, May 21-24, 2006.
A. St. Leger and C. Nwankpa, "Reconfigurable Transmission Line Model for Analog Power Flow Computation," Proceedings of the 15th Power Systems Computation Conference, Liege, Belgium, August 22-26, 2005.
A. St. Leger, “Transmission Line Modeling for the Purpose of Analog Power Flow Computation of Large Scale Power Systems,” M.Sc. in Electrical Engineering. Philadelphia: Drexel University, 2005
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