POWER SYSTEM LABORATORY Department of Electrical Engineering College

POWER SYSTEM LABORATORY Department of Electrical Engineering, College of Engineering, Shibaura Institute of Technology Tokyo, JAPAN Research Topics ü ü ü Generation, transmission, and distribution system Dispersed type generation system Energy management of transportation system Member Goro FUJITA, Associate Professor Doctor Course Student D 3 : 1，D 2 : 1 Master Course Student M 2 : 2 Undergraduate Course Student B 4 : 11

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

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

Automobile’s power system modeling engine alternator transmission Element for simulation model construction üCruising pattern 10/15 mode üTransmission simulate gear shift pattern üAlternator detailed measured model üBattery charge and discharge characteristic model üLoad net resistances for lamp, starter, etc

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

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

Power System Laboratory Dispersed type power source group (1)Modeling of fuel cell dynamics (2)Supply and demand control of micro grid (3)Numerical analysis of co-generation system Oil exhaust Warm globalization Electric deregulation Increase of new energy and dispersed type power source Member M 2 : Yoshio UNO B 4 : Yuki CHIBAI Promotion B 4 : Takayasu TAKAHASHI B 4 : Hiroaki MATSUMOTO B 4 : Akito WATANABE M 2 : Toru TOYOSHIMA (Hosei University) of effective use

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

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

Numerical analysis of co-generation system Purpose Operation scheduling of cogeneration system using fuel cell Cost and CO 2 exhaust evaluation Solution Numerical analysis Demand Powerload Cost evaluation Primary energy for Power supply Electricity charge Total Powerload Fuel Cell X Thermal load [k. W] Thermal load Gas for Thermal Supply Gas charge for FC + Gas charge for thermal demand not supplied by FC Cost

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

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

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

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

Publications IEEJ Technical Report Liberalization of Electricity Markets and Technological Issues Ed. Ryuichi Yokoyama and 14 authors, Tokyo Denkidai Publishing, September 2001 (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”