School of Electrical & Electronic Engineering
Division of Power Engineering
st
MAJOR RESEARCH INTERESTS
My research effort is mainly focused on two major areas. The first area is Digital Control and Signal Processing, which covers processor synchronization algorithm development for distributed computation, high performance digital controller development using digital signal processors, complex programmable logic devices and field programmable gate arrays, and advanced signal processing methodologies. The second area is Energy Conversion Systems, which covers energy conversion system design for electric vehicle and fuel cell applications, energy converter electromagnetic
(EMI) suppression techniques, energy converter spectral performance analysis, and advanced power quality conditioner development. Most of the projects are carried out in collaboration with researchers from the Wisconsin Electric
Machine and Power Electronic Consortium, University of Wisconsin-Madison, USA and Monash University, Australia.
RECENT REPRESENTATIVE PUBLICATIONS
1.
P.C. Loh, D.G. Holmes, Y. Fukuta and T.A. Lipo, "Reduced Common Mode Modulation Strategies for
Cascaded Multilevel Inverters", to appear in IEEE Transactions on Industry Applications (awarded 3 rd
prize paper by the Industrial Power Converter Committee, IEEE Industry Applications Society).
2.
P.C. Loh, D.G. Holmes, Y. Fukuta and T.A. Lipo, "A Reduced Common Mode Hysteresis Current Regulation
Strategy for Multilevel Inverters", to appear in IEEE Transactions on Power Electronics.
3.
P.C. Loh, N.J. Newman, D.N. Zmood and D.G. Holmes, "A Comparative Analysis of Multi-loop Voltage
Regulation Strategies for Single and Three-Phase UPS Systems", to appear in IEEE Transactions on Power
Electronics.
4.
P.C. Loh, G.H. Bode, D.G. Holmes and T.A. Lipo, "A Time-Based Double-Band Hysteresis Current
Regulation Strategy for Single-Phase Multilevel Inverters", IEEE Transactions on Industry Applications, vol.
39, pp. 883-892, May/June 2003.
5.
P.C. Loh and D.G. Holmes, "A Multidimensional Variable Band Flux Modulator for Four-Phase-Leg Voltage
Source Inverters", IEEE Transactions on Power Electronics, vol. 18, pp. 628-635, March 2003.
6.
P.C. Loh and D.G. Holmes, "Flux Modulation for Multilevel Inverters", IEEE Transactions on Industry
Applications, vol. 38, pp. 1389-1399, Sept/Oct. 2002.
7.
P.C. Loh and D.G. Holmes, "A Variable Band Universal Flux/Charge Modulator for VSI and CSI
Modulation", IEEE Transactions on Industry Applications, vol. 38, pp. 695-705, May/June 2002.
8.
P.C. Loh, H. Cheng, S. Mok, C.S. Chang and S. Elangovan, "Voltage Quality Enhancement with Wavelet-
Artificial Intelligence Controlled Current Limiting Devices", Electric Machines and Power Systems Journal, pp. 811-822,2000.
9.
C.S. Chang and P.C. Loh, "Integration of Fault Current Limiters on Power Systems for Voltage Quality
Improvement", Electric Power Systems Research Journal, pp. 83-92,2001.
Page PE1 of PE6 Updated in Sep 2005

School of Electrical & Electronic Engineering
Division of Power Engineering
MAJOR RESEARCH INTERESTS
My research effort is mainly focused on the area of Power Electronics. For medium power converters, the research focus is in UPS, Dynamic Voltage Restorers and different kinds of devices use for power quality or drives application.
Another area of focus is in small converters for DC-DC supplies. Research focus here is in the controls of resonant converters as well as on their topology.
RECENT REPRESENTATIVE PUBLICATIONS
1.
E. K. K. Sng, S. S. Choi and D.M. Vilathgamuwa, "Analysis of Series Compensation and DC Link Voltage
Controls of a Transformerless Self-Charging Dynamic Voltage Restorer" to appear in IEEE Transactions for
Power Delivery.
H. Chen, E. K. K. Sng, K. J. Tseng "Optimum Trajectory Switching Control for Series Parallel Resonant
Converter" to appear in Conference Proceedings IECON'03 .
Page PE2 of PE6 Updated in Sep 2005

School of Electrical & Electronic Engineering
Division of Power Engineering
MAJOR RESEARCH INTERESTS / CURRENT RESEARCH
SO Ping Lam joined China Light and Power Company Limited, Hong Kong as General Assistant Engineer in 1980 and later as Second Engineer working in the field of power system protection. He left this company in 1991 to further his studies in the UK. He received his BEng degree with first class honours in Electrical Engineering from the University of
Warwick in 1993, and his PhD degree in Electrical Power Systems from Imperial College, University of London in 1997.
Currently, he is an Assistant Professor in the School of Electrical and Electronic Engineering, Nanyang Technological
University. He has been appointed as the Program Director in Network Technology Research Centre, Nanyang
Technological University since April 2003. He is providing leadership in spearheading research efforts in developing advanced power line communication technologies. He is the principle investigator of a research project in collaboration with Agilent Technologies Singapore to form a joint lab to undertake reseach and development on advacned power line communcation systems. He has published over 40 technical papers in international journals and conference proceedings.
His research interests are power system stability and control, FACTS, power quality and power line communications.
RECENT REPRESENTATIVE PUBLICATIONS
1.
L. T. Tang, P. L. So , E. Gunawan, Y. L. Guan, S. Chen, T. T. Lie, “Characterization and modeling of in-building power lines for high-speed data transmission”, IEEE Transactions on Power Delivery, Vol. 18, No. 1, January 2003, pp. 69-77.
2.
H. Meng, S. Chen, Y. L. Guan, C. L. Law, P. L. So , E. Gunawan, T. T. Lie, “Modeling of transfer characteristics for the broadband power line communication channel”, IEEE Transactions on Power Delivery, Vol. 19, No. 3, July
2004, pp. 1057-1064.
3.
Y. H. Ma, P. L. So , E. Gunawan, “Performance analysis of OFDM systems for broadband power line communications under impulsive noise and multipath effects”, accepted for publication in IEEE Transactions on
Power Delivery, 2004.
4.
K. Y. See, P. L. So , A. Kamarul, E. Gunawan, “Radio frequency common mode noise propagation model for power line cable”, accepted for publication in IEEE Transactions on Power Delivery, 2004.
5.
L. H. Tey, P. L. So , Y. C. Chu, “Improvement of power quality using adaptive shunt active filter”, accepted for publication in IEEE Transactions on Power Delivery, 2004.
POSSIBLE / CURRENT RI PARTNERS AND PROJECTS
Dr LI ErPing , Senior Scientist/Senior Manager/Associate Professor of the A*STAR Institute of High
Computing, "Modeling and Analysis of EMI Radiation for Broadband Power Line Commucations Networks".
Page PE3 of PE6 Updated in Sep 2005

School of Electrical & Electronic Engineering
Division of Power Engineering
MAJOR RESEARCH INTERESTS
K. J. Tseng was born in Singapore. He received the B.Eng. (First Class) and M.Eng. degrees from the NUS, Singapore, and the Ph.D. degree from Cambridge University, U.K. He is currently an Associate Professor at NTU. He teaches power electronics and drives and has supervised a number of research staff and students. He is also currently the Supervisor of the Power Electronics and Drives
Laboratory and the Deputy Director of Advanced Power Electronics Centre. He is Fellow of the Cambridge Commonwealth Society and the Cambridge Philosophical Society. In 1996, he was awarded the Swan Premium by the Institution of Electrical Engineers (UK), for his work on power semiconductor for use in traction drives. In 2000, he was awarded the IEEE Third Millennium Medal. He has been listed in the Marquis Who's Who in the World and Who's Who in Science and Engineering. His current research interests are:
• Modelling, simulation and design of electromechanical actuators and drive systems
• New structures and materials for power semiconductor and passive devices
• Advanced power electronic converters and systems
• Power electronic systems for biomedical, petrochemical, automation and data storage applications.
RECENT REPRESENTATIVE PUBLICATIONS
1.
Tseng K.J., and Palmer P.R., "Mathematical model of the gate turnoff thyristor for use in circuit simulations," IEE
Proceedings Pt. B, Vol. 141, No 6, Nov 1994, pp.284-292. (Awarded IEE Swan Premium)
2.
Tseng K.J. and Chen G., "Computer aided design and analysis of direct driven wheel motor drive," IEEE Trans on
Power Electronics, Vol. 12,No.3,May 1997, pp.517-527.
3.
Tseng K.J., Wang Y. and Vilathgamuwa D.M., "An experimentally verified hybrid Cassie-Mayr electric arc model for power electronic circuit simulation," IEEE Trans on Power Electronics, Vol. 12, No.3, May 1997, pp.429-436.
4.
Tan C.M. and Tseng K.J.,"Using power diode models for circuit simulations - a comprehensive review," IEEE
Trans on Industrial Electronics, Vol. 46, No.3, Jun 99, pp.637-645.
5.
Zhao L., Foo C.F., and Tseng K.J., "A new structure transcutaneous transformer for artificial heart," IEEE Trans on Magnetics, Vol.35, No.5, Sep 1999, pp.3550-3552.
6.
Shen J.X., Tseng K.J., Vilathgamuwa D.M. and Chan W.K., "A novel compact PMSM with magnetic bearing for artificial heart application," IEEE Trans on Industry Applications, Vol. 36, No.4, Jul/Aug 2000, pp. 1061-1068.
7.
Tseng K.J., Cao S. and Wang J., "A new hybrid C-dump and buck-fronted converter for switched reluctance motors," IEEE Trans on Industrial Electronics, Vol.47, No.6, Dec 2000, pp.1228-1236.
8.
Zhu J., Tseng K.J. and Foo C.F., "Effects of multi-segment structure in core loss reduction of MnZn ferrite at high frequencies," IEEE Trans on Magnetics, Vol.36, No.5, Sep 2000, pp.3408-3410.
9.
Xie Y., Vilathgamuwa M. and Tseng, K.J., "Observer Based Robust Adaptive Control of PMSM with Initial
Rotor Position Uncertainty", IEEE Transactions on Industry Applications, Vol.39, No.3, May 2003, pp.645-656.
10.
Hu J, Du J., and Tseng K. J. "High-Power Multi-Output Piezoelectric Transformers Operating at the Thickness
Shear Vibration Mode", Accepted for publication in IEEE Trans on Ultrasonics, Ferroelectrics, and Frequency
Control.
POSSIBLE/CURRENT RI PARTNERS AND PROJECTS
•
Electromechanical actuators; micro & nano drives; advanced power electronics (DSI)
•
Magnetically-assisted-bearing, linear and multi-axis motor drive systems (SIMTECH)
•
Silicon carbide, diamond, and carbon nanotubes for power semiconductor devices (IMRE)
•
Rotary blood pumps for artificial hearts (IBN)
•
Power electronic systems for chemical processes and production (ICES)
•
Computational electromagnetics, electromechanics, molecular and thermal dynamics (IHPC)
Page PE4 of PE6 Updated in Sep 2005

School of Electrical & Electronic Engineering
Division of Power Engineering
MAJOR RESEARCH INTERESTS
Dr Vilathgamuwa has been carrying out research on power electronics and drives since 1988. He has numerous publications in the areas of power converter control, electric drives and power quality. His current research interests are electric drives and actuators, power electronic applications in distributed generation and power quality. He is particularly interested in solving issues related to design, control and operation.
RECENT REPRESENTATIVE PUBLICATIONS
1.
Mahinda Vilathgamuwa, Deng Junhong, "Volterra series analysis of spectral components in quasi-resonant dc-dc converters", International Journal of Circuit Theory and Applications, Vol. 125, pp125-134, 1997.
2.
Mahinda Vilathgamuwa, S R Wall, R D Jackson, "Variable structure control of voltage sourced reversible rectifiers", IEE Proceedings of Electrical Power Applications, Vol. 143, No. 1, January 1996, pp. 18-24.
3.
Mahinda Vilathgamuwa, J Deng, K J Tseng, "EMI suppression with switching frequency modulated dc-dc converters", IEEE Industry Applications Magazine, Nov/Dec. 1999, pp. 27-33.
4.
M Vilathgamuwa, X Zhu, S S Choi, "A robust control method to improve the performance of a unified power flow controller", Electric Power System Research Journal, Vol. 55, No. 2, August 2000, pp. 103-111.
5.
J X Shen, K J Tseng, D M Vilathgamuwa, W K Chan, "A novel compact PMSM with magnetic bearing for artificial heart application," IEEE Transactions on Industry Applications, July/August 2000, pp. 1061-1068..
6.
S S Choi, B H Li and D M Vilathgamuwa, "Design and analysis of the inverter-side filter used in the dynamic voltage restorer," IEEE Transactions on Power Delivery, Vol. 17, No. 3, July 2002, pp. 857 -864.
7.
Mahinda Vilathgamuwa, A A D Ranjith Perera, S S Choi, "Performance improvement of the dynamic voltage restorer with closed-loop load voltage and current-mode control," Accepted for IEEE Transactions of Power
Electronics.
8.
D. Mahinda Vilathgamuwa, A A D Ranjith Perera and S S Choi, "Voltage sag compensation with energy optimized dynamic voltage restorer," accepted for IEEE Transactions on Power Delivery.
9.
Yang Yi, D Mahinda Vilathgamuwa and M A Rahman, "Implementation of an artificial neural network based real time adaptive controller for an interior permanent magnet motor drive," accepted for IEEE Transactions on
Industry Applications.
10.
X. Yue, D.M. Vilathgamuwa and K.J. Tseng, "Observer based robust adaptive control for PMSM with initial rotor position uncertainty" accepted for IEEE Transactions on Industry Applications.
Page PE5 of PE6 Updated in Sep 2005

School of Electrical & Electronic Engineering
Division of Power Engineering
BRIEF CV
Dr. Wang Youyi received his PhD degree from the University of Newcastle, Australia, in 1991, in electrical engineering. Currently he is an associate professor in the School of Electrical and Electronic Engineering, Nanyang
Technological University, Singapore. Since he joined Nanyang Technological University in 1991, Dr. Wang has published over 120 international journal and conference papers on power system control, stability analysis, FACTS, voltage stability, electric drive control, information storage system and control theory. Dr. Wang is the principal investigator for more than 20 industrial and research projects, the total research funds are over two million Singaporean dollars. Dr. Wang is currently the Program Director (Flexible Transmission-Distribution Systems) for the Centre for
Advanced Power Electronics in the School of Electrical and Electronic Engineering, Nanyang Technological
University, Singapore. Dr. Wang has supervised and is supervising five research fellows and twenty-one postgraduate students, nine of whom have been awarded Ph. D. degrees and six M. Eng. degrees.
MAJOR RESEARCH INTERESTS
Dr. Wang's main research interests are in the area of nonlinear control, robust control, adaptive control, H
∞ control and applications of control theory to power systems, electric drive systems, information storage systems and electric vehicles.
RECENT REPRESENTATIVE PUBLICATIONS
1.
D. J. Hill, Y. Guo, M. Larsson and Y. Wang, Global Hybrid Control for Large Power Systems, In G. Chen, D. J.
Hill, X. Yu (eds.), Lecture Notes in Control and Information Sciences, Chaos and Bifurcation Control: Theory and
Applications, Volume II: Bifurcation Control, Springer-Verlag, to appear, 2003.
2.
L. Cong, Y. Wang and D. J. Hill, Coordinated Control Design of Generator Excitation and SVC for Transient
Stability and Voltage Regulation Enhancement of Multi-machine Power Systems, Int. Journal of Nonlinear and
Robust Control,
2003, to appear.
3.
J. Zhou and Y. Wang, Fast Sliding-Mode Seek Control of Hard Disk Servos, Int. J. of Microsystem Technologies,
2003, to appear.
4.
L. Cong and Y. Wang, Coordinated Control of Generator Excitation and STATCOM for Rotor Angle Stability and
Voltage Regulation Enhancement of Power System,
IEE Proc. Part C, Gener. Transm . andDistri.,
Vol. 149, No.
6,659-666,2002.
5.
G. Guo, R. Chen, T.-S. Low and Y. Wang, Optimal Control Design for Hard Disk Drive Servosystems, IEE
Proceedings - Control Theory and Applications, Vol. 149, No. 3, pp. 237 - 242,2002.
6.
H. Chen, Y. Wang and R. Zhou, Transient Stability Enhancement via Coordinated Excitation and UPFC Control,
Int. J. Electrical Power & Energy Systems, Vol. 24, No. 1, pp. 19 - 29,2002.
7.
J. Zhou and Y. Wang, Adaptive Backstepping Speed Controller Design for A Permanent Magnet Synchronous
Motor, IEE Proc. Electric Power Applications, Vol. 149, No. 2, pp. 165 - 172,2002.
8.
Y. Wang, Y. L. Tan and G. Guo, Robust Nonlinear Coordinated Excitation and TCSC Control for Power Systems,
IEE Proc. Part C, Gener. Transm . andDistri.,
Vol. 149, No. 3, pp. 367 - 372,2002.
9.
A. A. Hashmani, Y. Wang and T. T. Lie, Enhancement of Power System Transient Stability using A Nonlinear
Coordinated Excitation and TCPS Controller, Int. J. Electrical Power & Energy Systems, Vol. 24, pp. 201 - 214,2002.
10.
Y. Wang, A. A. Hashmani and T. T. Lie, A Nonlinear Coordinated Excitation and TCPS Controller for
Multimachine Power System Transient Stability Enhancement,
IEE Proc. Part C, Gener. Transm . and Distri.,
Vol. 148, No. 2, pp. 133 - 141,2001.
Page PE6 of PE6 Updated in Sep 2005