## 2014-2015 Publications

D. Apostolopoulou, A. D. Domínguez-García and P. W. Sauer, “Online Estimation of Power System Actual Frequency Response Characteristic,” *Proc. IEEE Power and Energy Society General Meeting*, Washington, DC, July 2014.

J. W. Bray, R. Fair and K. Haran, “Wind and Ocean Power Generators,” *IEEE Trans. Appl. Superconductivity*, vol. 24, no. 3, pp. 1 – 7, 2014.

V. T. Buyukdegirmenci, A. M. Bazzi and P. T. Krein, “Evaluation of Induction and Permanent-Magnet Synchronous Machines Using Drive-Cycle Energy and Loss Minimization in Traction Applications,” *IEEE Trans. Industry Appl*., vol. 50, no. 1, pp. 395 – 403, Jan.-Feb. 2014.

V. T. Buyukdegirmenci and P. T. Krein, “Induction Machine Characterization for Short-Term or Momentary Stall Torque,” *IEEE Trans. Industry Appl.*, vol. 51, no. 3, pp. 2237 – 2245, 2015.

V. T. Buyukdegirmenci and P. T. Krein, “Inverter Characterization for Intermittent and Peak Duty Motor Drives,”* Proc. IEEE Appl. Power Electronics Conf*., 2014, pp. 791 – 798.

S. T. Cady, A. D. Domínguez-García and C. N. Hadjicostis, “Finite-Time Approximate Consensus and its Application to Distributed Frequency Regulation in Islanded AC Microgrids,” *Proc. Hawaii Int’l Conf. on System Sciences*, Kauai, HI, January 2015.

E. Candan, P. Shenoy and R. C. N. Pilawa-Podgurski, “A Series-Stacked Power Delivery Architecture with Isolated Differential Power Conversion for Data Centers” *IEEE INTELEC*, Vancouver, BC, 2014.

Y. C. Chen, A. D. Domínguez-García and P. W. Sauer, “Generalized Injection Shift Factors and Application to Estimation of Power Flow Transients,” *Proc. North American Power Symposium*, September 2014.

X. Cheng, X. Hu, L. Yang, I. Husain, K. Inoue, P. T. Krein, R. Lefevre, Y. Li, H. Nishi, J. G. Taiber, F.-Y. Wang, Y. Zha, W. Gao and Z. Li, “Electrified Vehicles and the Smart Grid: The ITS Perspective,”* IEEE Trans. Intelligent Transportation Syst*., vol. 15, no. 4, pp. 1388 – 1404, 2014.

A. Davoudi, J. M. Guerrero, F. Lewis, R. Balog, B. Johnson, W. Weaver, L. Wang, C. Edrington, R. Blasco-Gimenez, A. Domínguez-García and M. Chow, “Guest Editorial: Advanced Distributed Control of Energy Conversion Devices and Systems,” *IEEE Trans. Energy Conversion*, vol. 29, no. 4, pp. 819 – 822, 2014.

A. D. Domínguez-García and C. N. Hadjicostis, “Convergence Rate of a Distributed Algorithm for Matrix Scaling to Doubly Stochastic Form,” *IEEE 53rd Annual Conf. Decision and Control*, 2014, pp. 3240 – 3245.

A. D. Domínguez-García and C. N. Hadjicostis, “Coordination of Distributed Energy Resources for Provision of Ancillary Services: Architectures and Algorithms,” *Encyclopedia of Systems and Control*, J. Baillieul and T. Samad (Eds.) London: Springer-Verlag, 2015.

S. V. Dhople, A. D. Domínguez-García and P. T. Krein, “Stochastic Hybrid Systems Models for Performance and Reliability Evaluation of Power-Electronic Systems,” Reliability of Power Electronic Converter Systems, Henry Shu-Hung Chung, Frede Blaabjerg, Huai Wang, and Michael Pecht (Eds.), *The Institution of Engineering and Technology*. 2014 – 2015.

J. Galtieri and P. T. Krein, “Designing Solar Arrays to Account for Reduced Performance from Self-Shading,” *Proc. IEEE Power and Energy Conf. at Illinois*, February 2015.

B. Gharesifard, T. Basar and A. D. Domínguez-García, “Designing Pricing Strategies for Coordination of Networked Distributed Energy Resources,” *Proc. IFAC World Congress*, Cape Town, South Africa, August 2014.

N. Golmie, S. Smith, L. Tong, A. Domínguez-García, S. Roy, J. Misic and R. Rajagopal, “Guest Editorial for the Special Series on Smart Grid Communications,” *IEEE Journal on Selected Areas in Communications*, vol. 32, no. 7, pp. 1309 – 1311, 2014.

C. N. Hadjicostis and A. D. Domínguez-García, “Convergence Rate of a Distributed Algorithm for Ma-trix Scaling to Doubly Stochastic Form,” *Proc. IEEE Control and Decision Conf*., Los Angeles, CA,December 2014.

A. Ho, M. Schuck and R. C. N. Pilawa-Podgurski, “Asymmetric Interleaving in Low-Voltage CMOS Power Management with Multiple Supply Rails,” *IEEE Energy Conversion Congress and Exposition*, Pittsburgh, PA, 2014.

S. Hossain and H. Zhu, T. J. Overbye, “Distribution High Impedance Fault Location Using Localized Voltage Magnitude Measurements,” *Proc. North American Power Symposium*, September 2014.

J. Hughes, A. D. Domínguez-García and K. Poolla, “Virtual Battery Models for Load Flexibility from Commercial Buildings,” *Proc. Hawaii Int’l Conf. on System Sciences*, Kauai, HI, January 2015.

W. Jang, S. Mohapatra and T. J. Overbye, “Towards a Transmission Line Limit Preserving Algorithm for Large-Scale Power System Equivalents,” *Proc. 48th Annual Hawaii Int’l Conf. on System Sciences*, Poipu, HI, January 2015.

X. Jiang and A. D. Domínguez-García, “A Zonotope-Based Method for Uncertainty Analysis in Power Systems with Renewable Generation,” *Proc. North American Power Symposium*, September 2014.

B. B. Johnson, S. V. Dhople, J. L. Cale, A. O. Hamadeh and P. T. Krein, “Oscillator-Based Inverter Control for Islanded Three-Phase Microgrids,” *IEEE J. Photovoltaics*, vol. 4, no. 1, pp. 387 – 395, 2014.

B. B. Johnson, S. V. Dhople, A. O. Hamadeh and P. T. Krein, “Synchronization of Nonlinear Oscillators in an LTI Electrical Power Network,” *IEEE Trans. Circuits and Syst. I: Regular Papers*, vol. 61, no. 3, pp. 834 – 844, 2014.

B. B. Johnson, S. V. Dhople, A. O. Hamadeh and P. T. Krein, “Synchronization of Parallel Single-Phase Inverters with Virtual Oscillator Control,” *IEEE Trans. Power Electronics*, vol. 29, no. 11, pp. 6124 – 6138, 2014.

M. Kazerooni, H. Zhu and T. J. Overbye, “Dynamic Modeling and Filtering in Geomagnetically Induced Current Validation,” *Proc. North American Power Symposium*, September 2014.

M. Kazerooni, Z. Hao and T. J. Overbye, “Singular Value Decomposition in Geomagnetically Induced Current Validation,” *Proc. IEEE Innovative Smart Grid Technologies Conf.*, Washington, DC, February 2015.

K. A. Kim, J. Ehlmann, and P. T. Krein, “Photovoltaic Hot Spot Mitigation Using Voltage-Threshold Control at the Panel Level, *ICPE 2015-ECCE Asia. Power Electronics and ECCE Asia, 2015 9th International Conf*., pp. 1916 – 1921.

K. A. Kim, P. S. Shenoy and P. T. Krein, “Converter Rating Analysis for Photovoltaic Differential Power Processing Systems,” *IEEE Trans. Power Electronics*, vol. 30, no. 4, pp. 1987 – 1997, 2015.

K. A. Kim and P. T. Krein, “Reexamination of Photovoltaic Hot Spotting to Show Inadequacy of the Bypass Diode,” *IEEE J. Photovoltaics*, vol. 5, no. 5, pp. 1435 – 1441, 2015.

S. J. Kim, R. K. Nandwana, Q. Khan, R. Pilawa-Podgurski and P. K. Hanumolu, “12.2 A1.8V 30-to-70MHz 87% Peak-Efficiency 0.32mm² 4-Phase Time-Based Buck Converter Consuming 3μA/MHz Quiescent Current in 65nm CMOS,” *IEEE International Solid-State Circuits Conf.*, 2015.

K. Kirihara, K. E. Reinhard, Yang Liu and P. W. Sauer, “Synchrophasor Visualizer,” *Proc. IEEE Power and Energy Conf. at Illinois*, February 2015.

K. Kirihara, K. E. Reinhard and A. K. Yoon, “Investigating Synchrophasor Data Quality Issues,” *Proc. IEEE Power and Energy Conf. at Illinois*, February 2014.

D. Loder and K. S. Haran, “Multi-Objective Field Optimization of a Novel Superconducting Machine,” *Proc. IEEE Power and Energy Conf. at Illinois*, February 2015.

B. B. Macy, Y. Lei and R. C. N. Pilawa-Podgurski, “A 1.2 MHz, 25 V to 100 V GaN-Based Resonant Dickson Switched-Capacitor Converter with 1011 W/in³ (61.7 kW/L) Power Density,” *IEEE Appl. Power Electronics Conf.* 2015, pp. 1472 – 1478.

J. Martin and K. Haran, “High-Frequency Airgap Windings for High-Power Density Electrical Machines,” *Electrical Manufacturing & Coil Winding Expo*, Milwaukee, May 2015.

J. McClurg, P. Shenoy and R. C. N. Pilawa-Podgurski “A Series-Stacked Architecture for High-Efficiency Data Center Power Delivery,” *IEEE Energy Conversion Congress and Exposition*, Pittsburgh, PA, 2014.

S. Mohapatra, W. Jang and T. J. Overbye, “Equivalent Line-Limit Calculations for Power System Equivalent Networks,” *IEEE Trans. on Power Syst.*, vol. 29, pp. 2338 – 2346, September 2014.

S. Mohapatra and T. J. Overbye, “An Interactive Tool for Measurement-Driven Modal Analysis of Large-Scale Power Systems,” *Proc. IEEE Power and Energy Conf*. at Illinois, February 2015.

O. A. Ogunnubi and T. J. Overbye, “An Economic Valuation of Solar Energy Potential in Nigeria,” *Proc. IEEE Power and Energy Conf. at Illinois*, February 2015.

T. J. Overbye, Chapter 2 11 in *Real-Time Stability in Power Systems*:, “Techniques for Early Detection of the Risk of Blackout,” S. C. Savulescu, Ed., Springer, July 2014.

D. Phillips and T. J. Overbye, “Event Analysis of Distribution System Voltage Data,” Proc. *IEEE Power and Energy Conf. at Illinois*, February 2015.

R. C. N. Pilawa-Podgurski and Y. Lei, “Circuit Techniques for Improving the Power Density of Switched-Capacitor Converters,” in *Power Management Integrated Circuits and Technologies*, M. Hella, Ed., Taylor & Francis, London, 2015.

B. Pinte, M. Quinlan, A. Yoon, K. Reinhard and P. W. Sauer, “A One-Phase, Distribution-Level Phasor Measurement Unit for Post-Event Analysis,” *Proc. IEEE Power and Energy Conf. at Illinois*, February 2014.

S. Qin, S. T. Cady, A. D. Domínguez-García and R. C. N. Pilawa-Podgurski, “A Distributed Approach to Maximum Power Point Tracking for Photovoltaic Sub-Module Differential Power Processing,” *IEEE Trans.Power Electronics*, vol. 30, no.4, pp. 2024 – 2040, April 2015.

P. W. Sauer and A. D. Domínguez-García, “Data Driven Dynamic Security Assessment,” *IEEE PES General Meeting | Conf. & Exposition*, July 2014, National Harbor, MD, pp. 1 – 2.

P. W. Sauer and M. A. Pai, “Power System Dynamic Equilibrium, Power Flow, and Steady-State Stability,” Chapter 1 in *Real-Time Stability in Power Systems*, S. C. Savulescu, Ed., Springer, pp. 1 – 26, 2014.

K. S. Shetye and T. J. Overbye, “Parametric Steady-State Voltage Stability Assessment of Power Systems Using Benchmark Scenarios of Geomagnetic Disturbances,”* Proc. IEEE Power and Energy Conf. at Illinois*, February 2015.

S. Sridharan and P. T. Krein, “Induction Motor Drive Design for Traction Application Based on Drive-Cycle Energy Minimization,”* Proc. IEEE Appl. Power Electronics Conf*., 2014, pp. 1517 – 1521.

S. Sridharan and P. T. Krein, “Optimizing Variable DC Link Voltage for an Induction Motor Drive under Dynamic Conditions,” *IEEE Transportation Electrification Conf. and Expo*, June 2015.

W. Yao, J.-M. Jin, P. T. Krein and M. P. Magill, “A Finite-Element-Based Domain Decomposition Method for Efficient Simulation of Nonlinear Electromechanical Problems,” *IEEE Trans. Energy Conversion*, vol. 29, no. 2, pp. 309 – 319, 2014.

Y. C. Chen, A. D. Domínguez-García and P. W. Sauer, “A Sparse Representation Approach to Online Estimation of Power System Distribution Factors,” *IEEE Trans. Power Syst*., vol. 30, no. 4,pp. 1727 – 1738, 2014.

J. Zhang and A. D. Domínguez-García, “On the Failure of Power System Automatic Generation Control Due to Measurement Noise,” *Proc. IEEE Power and Energy Society General Meeting*, Washington, DC, July 2014.

J. Zhang and A. D. Domínguez-García, “On the Impact of Communication Delays on Power System Automatic Generation Control Performance,” *Proc. North American Power Symposium*, September 2014.

J. Zhang, L. DeVille, S. V. Dhople and A. D. Domínguez-García, “A Maximum Entropy Approach to the Moment Closure Problem for Stochastic Hybrid Systems at Equilibrium,” Proc. *IEEE Control and Decision Conf*., Los Angeles, CA, December 2014.

S. Zhang, N. R. Shanbhag and P. T. Krein, “System-Level Optimization of Switched-Capacitor VRM and Core for Sub/Near-Vt Computing,” *IEEE Trans. Circuits and Syst. II: Express Briefs*, vol. 61, no. 9, pp. 726 – 730, 2014.

S. Zhang, J. S. Tu, N. R. Shanbhag and P. T. Krein, “A 0.79 pJ/K-Gate, 83% Efficient Unified Core and Voltage Regulator Architecture for Sub/Near-Threshold Operation in 130 nm CMOS,” *IEEE J. Solid State Circuits*, vol. 49, no. 11, pp. 2644 – 2657, 2014.

### Patents

B. Johnson, P. T. Krein, A. Gray and P. L. Chapman, “Inverter Array with Localized Inverter Control,” U.S. Patent 8,842,454, September 23, 2014.

R. S. Longtin, R. M. Zirin and K. S. Haran, “Wind Power Generation Systems Including Segmented Stators,” U.S. Patent No. 8,860,287, October 14, 2014.

A. M. Bazzi and P. T. Krein, “System and Method for Compensating for High Frequency Application of Ripple Correlation to Minimize Power Losses in Induction Machines,” U.S. Patent 9,007,014, April 14, 2015.