Electrical Engineer Power

Liming Zhou, Ph.D.

**** ******* ***, *****, ** 44139. 216-***-****.

**************@*****.***

BACKGROUND

A Ph.D. electrical engineer with experience in high voltage engineering as

related to high voltage dielectric design, power equipment and cable

diagnostics (PD detection, TDR, etc.), application of HVDC cable, medical

diagnostics (CT scanners), electromagnetic compatibility (EMC), transient

phenomena in high voltage systems, etc. Experience applying COMSOL and

ANSYS finite element software, MatLab, Maple, MathCad, etc. to engineering

tasks.

EXPERIENCE

PHILIPS HEALTHCARE, Highland Heights, OH

08/2007 - Present

High Voltage Design Lead

. Developed hardware requirements and specifications of 140kV x-ray

tube, High voltage generator (120kW, 140kV), remote power distribution

unit (PDU, 180 kW) and interconnecting cables for CT scanner.

. Developed verification testing methods for hardware (HV Cables,

HV x-ray tube, High voltage generator, remote power

distribution, DC power supplies) and conducted system

verification tests;

. Developed power chain and cabling system for CT scanner (power

distribution, cable design, interfaces, protection and

connections) and system PE layout to meet NEC, IEC, EN, UL, CSA

and GB specifications.

. Designed HVDC cable for cost reduction ($0.5 million

saving/year) and EMC reliability with Lean six-sigma tools.

. Developed test methodology and automation test tools and

software programs for verification testing, bench testing, and

manufacture testing by using LABVIEW software.

. Developed "EMC/EMI design guidelines and testing methods for CT

scanners" (criteria of high frequency field, shielding,

protection, grounding and cable routing/cross talk).

. Developed "CT scanner gantry grounding system against EMI and

its good engineering practice guidelines".

. Increased the reliability of CT scanner system against HV

anomaly (transient voltage and arcs in x-ray tube) through

transmission line model simulation with analytical tools

(Pspice, ATP-EMTP, LT spice, Matlab, Labview).

. Conducted EMC/EMI troubleshooting and problem mitigation with

spectrum analyzer, high speed oscilloscopes, TDR and magnetic

and electric field probes.

. Leaded in driving design for EMI/EMC processes and best

practices throughout the company.

. Conducted EMC pre-compliance tests on CT scanners to meet EMC

specifications, EN 55011 (CISPR 11), EN61000, IEC 60601, IEC61000.

GE HEALTHCARE, Milwaukee, WI

09/2006 - 08/2007

High Voltage Design Lead

. Designed HV insulator, connector and cable for x-ray tubes under

condition of vacuum and high temperature by analyzing electric-

thermal field with COMSOL FEMLAB and ANYSIS;

. Conducted high voltage testing, dark current testing and PD testing

for verification the designs of HV insulators, HV transient protection

system.

. Performed HV failure troubleshooting for x-ray tube and HV

generator (isolated transformer, HV cables, HV transient voltage

protection in the system) and provide technical solutions.

. Conducted HV transient testing and analysis in x-ray tube system

with Pspice and ATP-EMTP and designed protection from HV

transient for x-ray system.

DTE ENERGY, Detroit, MI

1/2001 - 08/2006

Technical Program Manager

. Designed on-line partial discharge testing system and HF

capacitive sensor for underground power distribution cable

system, transformers, generators, motors, circuit breakers,

switchgears;

. Designed Labview automation program for field data acquisition

from HV cable system with semi-automation failure analysis and

automation report generation;

. Designed on-line TDR testing system for neutral corrosion, short

circuit from underground power cable insulation with HF current

sensor;

. Conducted lightning and switching transient voltage analysis in

the power distribution system by transmission line model

simulation with ATP-EMTP software;

. Conducted maintenance of the plant (nuclear and industrial)

power distribution system: circuit breakers, switches,

transformer, motors, substations, underground and overhead

cable, and protective relays by on-line diagnosis and

assessment.

. Managed assessment of the reliability of power distribution

system for 8 nuclear power plants, 5 utilities, and many

industrial plants.

. Performed insulation design and testing of switchgear, beakers,

transformers, XLPE, TRXLPE, EPR and PILC power cable and cable

termination insulation design for power system, etc.;

EIRC OF UCONN, Storrs, CT

1/1999 - 12/2000

Research Associate

. Designed automation system for power cable high frequency

properties and dielectric loss measurement;

. Developed high frequency attenuation cable for protecting AC

motors and power transformers through maximizing HF attenuation

by selecting dielectric material and shielding material.

. Investigated the insulation design in AC motors and power

transformers under fast transits.

. Modeled AC Motor and power transformers under fast transient

voltages with ATP-EMTP.

. Developed high voltage insulation material in variety of

insulation systems (solid insulation, air and vacuum) and

conducted modeling with Maxwell and FemLab software.

. Consulted to HV equipment manufactures with Aging, DC + impulse

and corona resistance testing.

ABB Corporate Research Ltd, Baden-Daettwil, Switzerland

1/1997 - 12/1998

Research Scientist

. Designed SF6/N2 insulation and Arc quench in circuit breakers

. Designed "High voltage system for synthesis gas production from

greenhouse".

. Designed pulsed corona discharge system for flue gas cleaning,

which satisfies the EU industrial requirement.

EDUCATION

Post-Doctoral Fellow (High Voltage Engineering)

. Eindhoven University of Technology Eindhoven, Netherlands

1/1995 - 12/1995

. Technical University of Ilmenau Ilmenau, Germany

1/1996 - 12/1996

Ph.D. (High Voltage Engineering)

. Xian Jiaotong University Xian, China

3/1992 - 11/1994

M. Sc. (Applied Physics - Electrostatics)

. Beijing Institute of Technology Beijing, China

9/1988 - 3/1991

B. Sc. (Applied Physics)

. Beijing Institute of Technology Beijing, China 9/1981 -

7/1985

AFFILIATIONS

. IEEE Senior Member

. Six Sigma Green Belt Certification,

PATENTS

"A high voltage process of production of synthesis gas", USA patent

Appl. Ser. No. 09/220,604 of 28.12.1998

"Production of synthesis gas from Greenhouse gases with high voltage

plasma", Canada patent Appl. No. 2.256,957 of 23.12.1998

"A new method for on-line Partial Discharge Testing". USA patent in

the appl proc.

"On-line discontinuity testing method for URD cables". USA patent in

the appl proc.

"HV ripple testing method for the x-ray generator application". USA

patent in the appl proc.

SELECTED PUBLICATIONS

C. Xu, L. M. Zhou, Joe Y., S. A. Boggs, "High frequency properties of

shielded power cable Part 1: Overview of Mechanisms", IEEE Electrical

Insulation Magazine, VOL.21, NO.6, November/December 2005, 24 - 28

L. M. Zhou, S. A. Boggs, "High frequency attenuating cable for

protection of low-Voltage AC motors fed by PWM inverters", IEEE

TRANSACTIONS ON POWER DELIVERY, VOL.20, NO.2, APRIL 2005, 548 - 553

L. M. Zhou, S. A. Boggs, "Effect of shielded distribution cables on

lightning-induced overvoltage in a distribution system", IEEE

TRANSACTIONS ON POWER DELIVERY, VOL.17, NO.2, APRIL 2002, 569 - 604

L. M. Zhou, S. A. Boggs, "Effect of shielded distribution cable on

very fast transients", IEEE Transactions on Power Delivery, Volume: 15

Issue: 3, July 2000, Page(s): 857 -863

Larkin, D. W.; Zhou, L. M.; Lobban, L. L.; Mallinson, R. G., "Product

Selectivity Control and Organic Oxygenate Pathways from Partial

Oxidation of Methane in a Silent Electric Discharge Reactor",

Industrial & Engineering Chemistry Research, 2001; 40(23); 5496-5506.

L. M. Zhou, B. Eliasson, U. Kogelschatz, "Non-equilibrium plasma

reform of greenhouse gases to CH4 and CO2 to synthesis gas ", Energy &

Fuels (Journal of American Chemical Society), 1998 (No. 6), PP. 1191-

1199

L. M. Zhou, B. Xue, B. Eliasson, U. Kogelschatz, "Partial oxidation of

methane to methanol with oxygen or air in dielectric-barrier

discharges", Plasma Chemistry and Plasma Processing, Vol. 18, No. 3,

1998, PP. 375 - 393

E. M. Van Veldhuizen, L. M. Zhou, W. R. Rutgers, "Combined pulsed

corona removal of SO2, no and NH3 from flue gas", Plasma Chemistry and

Plasma Processing, Vol. 18, No. 1, 1998, PP. 91-111

B. Eliasson, U. Kogelschatz, B. Xue and L. M. Zhou, "Hydrogenation of

carbon dioxide to methanol over discharge-activated catalyst",

Industrial & Engineering Chemistry Research, vol. 37, No. 8, 1998, PP.

3350 - 3357

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