Department of Electrical and Computer Engineering

Center for High Performance Power Electronics

Center for High Performance Power Electronics (CHPPE)

Sept 19th , 2014

Prof. Longya Xu

Director

Contents

• History of ECE at OSU

• CHPPE Faculty Members

• CHPPE Research Scopes and Strengths

• Formation of CHPPE Industry Consortium

• “More Electrical” Economy and Bright CHPPE

Future

2

ECE Labs in the History

3

CHPPE Faculty Members

Dr. Longya Xu,

Center Director

Dr. Mahesh

Illindala

Dr. Jian Kang

Wang

Dr. Jin Wang Dr. Fang Luo

Dr. Siddharth Rajan Dr. Wu Lu

4

CHPPE Research Scopes and Strengths

Major research areas

Faculty: 7

Visiting Scholars: 10

PhD Students: 30

MS Students 22

Research Expenditures: $2.0 million/year

Up-to-Date Facilities

High Performance Power Electronics Lab a multi-million dollar center geared

towards advanced power electronics circuits and devices;

High Voltage Laboratory a 3600 square feet facility that hosts the biggest arcs

and sparks in the U.S. universities;

Distributed Real Time Simulation Platform a DoE sponsored real time

simulation platform for both the electrical and communication systems within a

smart grid, featured in the New York Times on Dec. 30 2010.

Profile

Power Electronics

Electric Machines

Power System and High Voltage

Smart Grid

Electrification of Transportations

5

Renewable energy based charging facility

Faculty Expertise and Research Topics

6

New switching devices

Circuits and control

System integration

Two Junction points

kk-1

(K)dcV

k+1=kS k+1S

kS k+1S

(K-1)dcV

Reference

Waveform

m1A

2A

21 AA kS

k+1S= k

k+1

Two Junction points

kk-1

(K)dcV

k+1

kS k+1S

(K-1)dcV

Reference

Waveform

m1A

2A

21 AA

300 kW Inverter for the

Integration of Renewable

Energy

Optimal PWM for Multilevel Inverters

SiC and GaN Devices

Device Testing and Simulation

7

Center for High Performance Power Electronics a 6M dollar center geared

towards wide band gap based power devices and circuits;

Characterization of GE

Silicon Carbide

MOSFET

Characterization of

EPC GaN MOSFET

Device

Evaluation

FPGA based Real-time

Device Simulation

Implementing power electronics

models inside the FPGA pushes

the limits in simulations of high

speed switching.

Equipment

Thermo systems: Microclimate CSZ, 1.2 Cubic

feet, -73 to 190 degree c

ZPH-32, 32 Cubic feet, -45 to

190 degree c

Temptronic, -73 to 190 degree c

Power supply Programmable:

800 V, 30 A

1500 V, 16.5 A

60 A, 300 A

Variac and transformer:

Up to 20 kV

Measurements Curve Tracer with high voltage

module

Scopes: One 2 GHz, three 500

MHz, and six 200 MHz

One Network analyzer and one

power meter

50 kHz

Hardware-in-the-loop at 50 kHz switching

8

Circuit Design and Control

Advanced circuit design and control for the integration of renewable energy resources.

Modular Switched Capacitor Circuit A Photovoltaic Micro-Inverter without

Inductor and Transformer

95.0%

95.5%

96.0%

96.5%

97.0%

97.5%

98.0%

98.5%

99.0%

99.5%

100.0%

0 200 400 600

Effi

cie

ncy

(%)

Output Power (W)

Efficiency vs. Power

Measured

Estimated (25 °C)

Estimated (125 °C)

A 500 W GaN based Module.

S1

C1

S2

LS1

S3

C2

S4

LS2

S5

C3

S6

LS3

S7

C4

S8

LS4

C6

S9

C7

LS5

C8

LS6

CINDC RLOAD

1

2

3

S10

S11

S12

S4C1

S6 S10

VIN

S5 S9

S1C2

S3S8

S2S7

L

RLOAD

- VOUT +

LS1 LS2

1 2Voltage Quadrupler DC/DC stage.

Voltage doubler dc/ac stage.

Input voltage:

35 V dc

(nominal)

Output voltage:

120 V ac (rms)

9

Circuit and System Integration

Example: Very Large Scale Photovoltaic Power Plant

Fourteen Battery

Enhanced PV String

SiC Switched Capacitor

Inverter with Boost

Function

SiC H-Bridge based

cascade multi-level

inverter

Multilevel

direct tie to

13.2 kV (line-

line)

distribution

system

High frequency transformer

1:1

<400 V

<400 V

1:1

<400 V

1:1

Field Housed Inverter Station

SiC based

Synchronous

rectification

15 in parallel 8 in series

14

<800 V

<800 V

<800 V

Battery integrated smart PV module/string

Utilization of wide band gap devices, such as SiC

Switched capacitor based high frequency dc/ac

Direct tie with distribution system

A scale down prototype will be built

National Science Foundation

Award ID: 1054479

Example: Renewable energy assisted charging facility for EV/HEV

System Level Real Time Simulation

10

3 Phase fault

Vdc: 200V/div

ILES: 20 A/div

t1 t2 t3 t4 t5

Vbus: 1000 V/div

Simulation results observed with

Digital Oscilloscope at real time.

Education – New curriculum for Smart Power Engineering

11

A $2.5 M Curriculum Development Project sponsored by DoE and American Electric

Power, and supported by multiple industrial and non-profit organizations.

K-12 outreach programs

I-SMART curriculum/

Short Courses

· Clean coal

· Power

· Control

· Communication

· Solid state

· Policy/Pricing

University wide freshman

class: Energy & Society

E-Teaching/

Learning

Real-time hardware-in-

the-loop based

simulation platform

Lab tours/demos

Hands on experiences

Curriculum List

12

I-001Sustainable energy and power systems I

(Wang, Xu, Kasten) Au. I-002 Clean coal technology (Fan, Cruz) Wi.

I-003Power electronics circuits and their

applications in power systems (Wang) Au.I-004

Solid state materials and devices for energy systems

(Ringel, Rajan) Wi.

I-005Ac machines: energy generation and

conservation (Xu) Au.I-006 Communication in power systems (Ekici) Wi.

I-007 High voltage engineering (Wang) Wi. I-008Optimization and control for renewable energy

systems (Passino, Serrani) Sp.

I-009Sustainable energy and power systems II (Xu,

Wang) Sp. I-010

Modeling and multi-agent control of electric energy

systems (Cruz, Illindala) Wi.

I-011Bidding, Auctions, and Pricing in networked

electricity markets (Cruz, Illindala) Sp.

I -SMART Curriculum

Core Power Courses Interdisciplinary Courses

Class Enrollment

13

Class Enrollment Au. 2013

Sustainable Energy and Society 18

Sustainable energy and power systems I 68

Power Electronics I 98

Electric Machines 58

Class Enrollment Wi. 2012

Solid State Materials and Devices for Energy Systems 30

Multi-Agent control of electric energy systems 34

Power System Communication 11

Power Electronics II 31

High Voltage Engineering and Laboratory 48

The numbers for online enrollment of winter quarter classes are not

included.

Formation of CHPPE Industry Consortium

9/19/2014 14

• Purposes of Industry Consortium

- Universities, industry companies, and government work together in an

impacting and focused area of technology in a sustainable manner

• Activities of Industry Consortium

- Review meetings, workshops, short courses, on-site presentations, joint

publications, recruiting…

• Benefits to Members of Industry Consortium

- Focused research projects and annual research review meeting

- Access to non-contracted research and development results

- Customized training and prioritized recruiting of graduate students

- Discounted workshop and short-courses

9/19/2014 15

• Good Example of Industry Consortium

- WEMPC (outside OSU)

- VPEC (outside OSU)

- Smart CAR

…

• Membership of Industry Consortium

- Administrated by directors and supervised by Industry

advisory board

- Annual fee based ($24k/year, proposed)

- 25% discount to founding members ($18K/year)

16

Power electronics is in her new phase of development with WBD

technologies. Power electronics impacts our daily life and national

economy more than ever -

Power electronics enables the integration of all kinds of renewable energy

resources, electrification of transportation, and conservation of energy in

our “smart” economy and society.

“More Electric” Economy and Bright CHPPE Future

Thank you!!

Department of Electrical and Computer Engineering

Center for High Performance Power Electronics

Questions

18