1. POWER SYSTEM LABORATORY Department of Electrical Engineering, College of Engineering, Shibaura Institute of Technology Tokyo, JAPAN
Research Topics
Generation, transmission, and distribution system
Dispersed type generation system
Energy management of transportation system
Member
Goro FUJITA, Associate Professor
Doctor Course Student D3 : 1，D2 : 1
Master Course Student M2 : 2
Undergraduate Course Student B4 : 11

2. Research Interest Simulation, Optimization, and
generation
transmission
power electronics
control system
Simulation, Optimization, and
Hybrid configuration regarding
Energy management
urban development
apparatus
new transportation
new vehicle
plant
new energy

3. Power System Laboratory Vehicle research group
Present topics　
（1）Building of highly accuracy simulation model for automobile's power system
（2）Improvement and evaluation of automobile's battery lifetime
（3）Simultaneous experimental study using EDLC for automobile's power system
Future topics
（1） Expansion of automobile's power system simulation model
（2） Building of optimal energy management system (ex. Hybrid system)
（3）Supplemental experiments using EDLC and buttery
warm globalization
electrification
request for efficient
use of energy

4. Automobile’s power system modeling
engine
alternator
transmission
Element for simulation model construction
Cruising pattern  10/15 mode
Transmission  simulate gear shift pattern
Alternator  detailed measured model
Battery  charge and discharge characteristic model
Load  net resistances for lamp, starter, etc

5. Optimization of energy system management
Power system
Electric wire
Alternator
Deficient of generated energy
Loads
Covered by battery
Battery
2-series 12V battery
Deterioration of
battery
Belt
Therefore…
Combine EDLC to
improve battery’s lifetime
Engine
Shaft
Transmission
Model resistance and capacitor
Detailed battery model
Employing EDLC

6. Onsite / small-scale experiments
Insufficient terms in numerical simulation study are reinforced by experiments using commercial vehicles and small circuits DC
CONTROL R DC
　DC-DC
CONVERTOR 28
INPUT
[V] C
Measurement of alternator characteristic, Dec. 2006

7. Power System Laboratory Dispersed type power source group
Modeling of fuel cell dynamics
Supply and demand control of micro grid
Numerical analysis of co-generation system
Oil exhaust
Warm globalization
Electric deregulation
Increase of new energy and
dispersed type power source
Promotion of effective use
Member
M2 : Yoshio UNO
B4 : Yuki CHIBAI
B4 : Takayasu TAKAHASHI
B4 : Hiroaki MATSUMOTO
B4 : Akito WATANABE
M2 : Toru TOYOSHIMA (Hosei University)

8. Supply and demand control of micro grid
What is micro grid?
Conventional grid
Small-scale grid combining several quipments such as natural energy sources and power storage devices
system interconnection
Load
Merit
load
Compatibility of environment and reliability
High efficiency operation by integrated control
Employing new power source
Control
center
wind farm
gas turbine
(100MW)
Purpose
Micro-grid
fuel cell (10MW)
Discussion on power quality and control scheme
Solution
Numerical modeling and analysis
Research achievement
Grid interconnection type
Stability using secondary battery
Reduction of battery

9. Modeling of fuel cell dynamics
Purpose
Nernt’s equation
electric loss
thermodynamic model FC
demand control
electro chemical
equations
anode
electrolyte
cathode
fuel processor
air compressor
fuel cell stack
inverter
AC grid or load
power demand
partial pressure
sensitive heat
mole density
temperature
cell voltage
fuel supply
command
Load following characteristic and
thermal dynamic characteristic
Solution
Construct and analysis based on numerical model
Results
Future study
Contrast with measured value
Application for co-generation analysis
Power command and response
Operating temperature

10. Numerical analysis of co-generation system
Purpose
Operation scheduling of co-generation system using fuel cell
Cost and CO2 exhaust evaluation
Solution
Numerical analysis
Cost evaluation
Demand
Demand P P
rimary energy
rimary energy
for
Power
supply
for
for
Electricity charge
Power
Power
Power
Power
load
load
supply
supply
Gas
for
Thermal
Supply
Total
Power
Power
load
load
Fuel
Fuel
Cell
Cell
Gas charge for FC
Cost
Gas
Gas X X
[kW]
[kW]
Thermal
Thermal
load
load
for
for +
Thermal
Thermal
Gas charge for thermal demand not supplied by FC
Supply
Supply
Thermal
Thermal
load
load

11. Power System Laboratory Experiment group
Power quality analysis, stability control, and effective use of power system
Stabilized output
AC 54-66Hz
RFC
AC 60Hz
(100MVA)
Stator
Stator
360min-1
Rotor p
=10
Rotor
p=10
10% SM
DFM
Grid
AC Excitation
DC Excitation 6H z (
10%)
AVR
CC or GTO INV
Speed
Frequency
Smoothing by flywheel effect
Transfer Power Ref.
Controller WF
RFC station
(100MW)
(100MW)
Random output
Power system stabilization using RFC (Rotary Frequency Converter)

12. Power System Laboratory Power System Analysis groupAC DC
reactor
thyristor
Unified Power Flow Controller (UPFC) : “All Transmission Parameters Controller” 160MVA shunt and 160MVA series at Inez Substation (AEP)
TCSC equivalent circuit
HVDC equivalent circuit
Convertible Static Compensator (CSC): “Flexible Multifunctional Compensator” 200 MVA at Marcy Substation (NYPA)
Improvement of
frequency
characteristic
Thyristor Controlled Series Capacitor (TCSC): “Line Impedance Controller” 208MVar TSCS at Slatt Substation (BPA)
FACTS Controller “Back-To-Back HVDC Tie”, 20-50MW at Eagle Pass (CSW)
Static Synchronous Compensator (STATCOM) : “Voltage Controller” 100MVar STATCON at Sullivan Substation (TVA)
Cited from : A. Edris, ‘FACTS Technology Development : An Update’, IEEE Power Engineering Review, March 2000

13. Power System Laboratory Power quality group
REQUIRED POWER QUALITY CRITERIA U
(kV) t
Voltage profile
Voltage Black Out
(sag)
No Voltage Blackout
Stable Voltage
(Within Limit)
Sinusoidal wave form
(*THD < 5%)
Non – sinusoidal
wave form
No Harmonics UU UV UW
Unbalanced Voltage
Ideal balanced Voltage
No Unbalanced Voltage
101V± 6V
*THD: Total Harmonic Distortion 13

14. Solution Proposed device: Dynamic Voltage Restorer (DVR)
Principle : Inject a series voltage to improve voltage profile
Typical Dynamic Voltage Restorer Topology 14 14

15. Publications IEEJ Technical Report (in Japanese)
Joint research technical report by electric utilities, manufacturers, and universities under IEEJ (Institute of Electrical Engineering of Japan)
No.743 (1999) “Voltage and Reactive Power Control of Power System”
No.869 (2002) “Nominal and Emergency Load Frequency Control of Power System”
No.931 (2003) “Function of Automatic Power Dispatch System”
No.977 (2004) ”Explanation of Power Dispatch Technical Terms”
No.1025 (2005) “The Electric Power System Technique for Effective Use of the Dispersed Generation”
No.1059 (2006) “Power System Operation Structure in New Environment”
Liberalization of Electricity Markets and Technological Issues
Ed. Ryuichi Yokoyama and 14 authors, Tokyo Denkidai Publishing, September 2001 (in Japanese)