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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
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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
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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
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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
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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
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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
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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)
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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
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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
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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
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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)
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Power System Laboratory Power System Analysis group
AC 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
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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
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Solution Proposed device: Dynamic Voltage Restorer (DVR)
Principle : Inject a series voltage to improve voltage profile Typical Dynamic Voltage Restorer Topology 14 14
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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)
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