## 2008-2009 Publications and Patents

## Publications

A. J. Adzima, P.T.Krein, T.C. O’Connell, “Investigation of accelerating numerical-field analysis methods for electric machines with the incorporation of graphic-processor based parallel processing techniques,” *Proc. ESTS* *IEEE, *April 2009, pp. 59 – 64.

P. Alaeinovin, S. Chiniforoosh, A. Davoudi, J. Jatskevich, and P. L. Chapman, “Average-value modeling of automotive alternator-rectifier systems,” *Proc.** IEEE IAS,* Nov. 2008, pp. 2800-2805.

A. M. Bazzi, A. P. Friedl, S. Choi, and P. T. Krein, “Comparison of induction motor drives for electric vehicle applications: Dynamic performance and parameter sensitivity analyses,” *Proc. IEEE IEMDC*, May 2009, pp. 639-646.

A. M. Bazzi and P. T. Krein, “A survey of real-time power-loss minimizers for induction motors,” *Proc. ESTS* *IEEE, *April 2009, pp. 98-106.

A. M. Bazzi, J. W. Kimball, K. Kepley, and P.T. Krein, “TILAS: A simple analysis tool for estimating power losses in an IGBT-diode pair under hysteresis control in three-phase inverters,” *Proc. IEEE APEC*, 2009, pp. 637-641.

N. Benavides and P. L. Chapman, “Modeling the effect of voltage ripple on the power output of photovoltaic modules,” *IEEE Trans. Ind. Electron*., vol. 55, no. 7, pp. 2638-2643, July 2008.

J. Cardell, I. Dobson, W. Jewell, M. Kezunovic, T. J. Overbye, P. K. Sen, D. Tylavsky, L. Beard, F. Galvan, and D. Hawkins, “The electric power industry and climate change: US research needs,” *Proc. IEEE PES*, July 2008, pp. 1-3.

C. Davis and T. J. Overbye, “Linear analysis of multiple outage interaction,” *Proc. HICSS, *2009, pp. 1-8.

A. Davoudi, A. Bazzi, and P.L. Chapman, “Application of synergetic control theory to non-sinusoidal PMSMs via multiple reference frame theory,”*IEEE IECON*, Nov.2008, pp.2794-2799.

A. Davoudi, J. J. Jatskevich, and P. L. Chapman, “Computer-aided dynamic characterization of fourth-order PWM dc-dc converters,” *IEEE Transactions on Circuits and Systems II: Express Briefs*, vol. 55, no. 10, pp. 1021-1025, October, 2008.

A. Davoudi, P. L. Chapman, and J. J. Jatskevich, “Efficient multi-resolution simulation of PWM dc-dc converters,” *IEEE INTELEC*, Sept. 2008, pp. 1-7.

A. Davoudi, J. J. Jatskevich, and P. L. Chapman, “Computer-aided dynamic characterization of fourth-order PWM dc-dc converters,” *IEEE Transaction on Circuit and System II,* pp. 1021-1025, Oct. 2008.

A. Davoudi, N. Kong, M. Hagen, M. Muegel, and P. Chapman, “Automated tuning of nonlinear digital controllers in multi-phase dc-dc converters,” *IEEE APEC,* 2009, pp. 259-263.A. Davoudi, N. Kong, M. Hagen, M. Muegel, and P. Chapman, “A general framework for automated tuning of digital controllers in multi-phase dc-dc converters,” IEEE *APEC*, 2009, pp. 626-630.

A. Domínguez-García, J. G. Kassakian, J. E. Schindall, and J. J. Zinchuk, “An integrated methodology for the dynamic performance and reliability evaluation of fault-tolerant systems,” *Journal of Reliability Engineering & System Safety*, vol. 93, no. 11, pp 1628-1649, Nov 2008.

A. Domínguez-García and P. T. Krein, “A framework for multi-level reliability evaluation of electrical energy systems,” *IEEE Conference* *Energy 2030***, November 2008, pp. **1-6.

S. Dhople, A. Davoudi, A. Domínguez-García, and P.L. Chapman, “Reliability assessment of fault tolerant dc-dc converters for photovoltaic applications,” *IEEE Energy Conversion Congress and Exposition*, 2009, pp. 2271-2276.

T. Esram, P. T. Krein, B. T. Kuhn, R. S. Balog, and P. L. Chapman, “Power electronics needs for achieving grid-parity solar energy costs,” *IEEE Conference* *Energy 2030***, November 2008, pp. **1-5.

J. W. Kimball and P. T. Krein, “Discrete-time ripple correlation control for maximum power point tracking,” *IEEE Trans. Power Electronics*, vol. 23, no. 5, pp. 2353-2362, September 2008.

J. W. Kimball and P. T. Krein, “Singular perturbation theory for dc-dc converters and application to PFC converters,” *IEEE Trans. Power Electronics*, vol. 23, no. 6, pp. 2970-2981, November 2008.

J. W. Kimball and P. T. Krein, “A current-sensorless digital controller for active power factor correction control based on Kalman filters,” *Proc. IEEE Applied Power Electronics Conf., 2008*, pp. 1328-1333**.**

N. Kong, A. Davoudi, M. Hagen, E. Oettinger, M. Xu, D- S. Ha, and F. C. Lee, “Automated system identification of digitally-controlled multiphase dc-dc converters,” *Proc. IEEE APEC,* 2009, pp, 259-263.

P. T. Krein, J. W. Kimball, and B. T. Kuhn, “Non-droop methods for context-sensitive sharing in multi-module switching converters,” *Proc. IEEE Workshop on Control and Modeling for Power Electronics,* 2008, pp. 1-4.

A. Kwasinski, W. W. Weaver, P. L. Chapman, and P. T. Krein, “Telecommunications power plant damage assessment for Hurricane Katrina – Site survey and follow- up results,” *IEEE Systems Journal*, 2009, Volume 3, pp. 277 – 287, Sept. 2009.

T. C. O’Connell, P. T. Krein, M. Yilmaz, and A. Friedl, “On the feasibility of using large-scale numerical electric machine field analysis software in complex electric drive system design tools,” *Proc. IEEE COMPEL,* 2008, pp. 1-8.

T. J. Overbye, “Wide-area power system visualization with geographic data views,” *Proc. IEEE PES*, 2008, pp.1-3.

T. J. Overbye, “Visualization enhancements for power system situational assessment,” *Proc. IEEE PES, *2008, pp. 1-4.

T.J. Overbye, “Integration of realistic simulation software with design into a power system curriculum: power flow and transient stability case studies,” *Proc. IEEE PES*, 2008, pp. 1-2.

G. E. Pitel and P. T. Krein, “Real-time system identification for load monitoring and transient handling of dc-dc supplies,” *Proc. IEEE PESC*, 2008, pp. 3807-3813.

G. E. Pitel and P. T. Krein, “Minimum-time digital control with raster surfaces,” *Proc. IEEE COMPEL*, 2008, pp. 1-8.

C. Roe, E. Farantatos, J. Meisel, A. P. Meliopoulos, and T. J. Overbye, “Power system level impacts of PHEVs,” *Proc. 42nd Hawaii International Conference on System Sciences*, Waikoloa, HI, January 2009, pp.1-10.

C. Roe, A. P. Meliopoulos, J. Meisel, and T. J. Overbye, “Power system level impacts of plug-in hybrid electric vehicles using simulation data,” *Proc. IEEE Energy 2030*, pp. 1-6.

P. A. Ruiz and P. W. Sauer, “Spinning contingency reserve: economic value and demand functions,” *IEEE Transactions on Power Systems*, Vol. 23, No. 3, pp. 1071-1078, August, 2008.

H.-C. Seo, S. J. Hong, H.-I. Cho, J.-H. Lee, P. L. Chapman, and K. Kim, “Formation of low-resistance ohmic contact by damage-proof selective-area growth of single-crystal n+-GaN using plasma assisted molecular beam epitaxy (PAMBE),” *Journal of Electronic Materials*, Vol. 37, pp. 635-640, 2008.

H.-C. Seo, P. L. Chapman, H.-I. Cho, J.-H. Lee, and K. Kim, “Ti-based non alloyed metal contacts for Al_0.15Ga_0.85N/GaN high electron mobility transistors using regrown n+-GaN by plasma assisted molecular beam epitaxy,” *Applied Physics Letters*, 93, p. 102102, 2008.

H.-C. Seo, I. Petrov, P. L. Chapman, and K. Kim, “Elastic buckling of AlN ribbons on elastomeric substrate,” *Applied Physics Letters*, 94, p. 92104, 2009.

J. E. Tate and T. J. Overbye, “Line outage detection using phasor angle measurements,” *IEEE Transactions on Power Systems*, vol. PWRS-23, pp 1644-1652, Nov 2008.

J. E. Tate, T. J. Overbye, J. S. Sebestik, and G. Reese, “Interactive lessons for pre-university power education,” *IEEE Transactions on Power Systems*, vol. PWRS-23, pp. 824-830, Aug 2008.

J. E. Tate, J. Sebestik, T. J. Overbye, “Collaboration and dissemination efforts related to pre-university power lessons,” *Proc. IEEE PES* , 2008, p. 1.

L. Wang, A. Davoudi, J. Jatskevich, and P.L. Chapman, “Accelerated state-variable modeling of synchronous machine-converter systems,” *ISCAS* 08, pp.3037-3040.

W. W. Weaver, P. T. Krein, “Optimal geometric control of power buffers,” *IEEE Trans. Power Electronics*, vol. 24, no. 5, pp. 1248-1258, May 2009.

## Patents

P. T. Krein, “Methods and Devices for Input Waveform Control in Switching Power Supplies,” U. S. Patent 7,382,112, June 2008.