implementation of grid-friendly charging scheme to
TRANSCRIPT
Implementa�on of Grid-‐Friendly Charging Scheme to Electric Vehicle Off-‐board Charger for V2G
Y. Ota, H. Taniguchi, H. Suzuki (The University of Tokyo) T. Nakajima (Tokyo Electric Power Company) J. Baba, A. Yokoyama (The University of Tokyo)
IEEE PES ISGT Europe, Berlin, Germany, 16 October 2012 Session : Impact of Power Electronics Control, No.276
1/8
Smart Grids and E-‐Mobility
1. New electrical demand 2. Controllable demand (ADR, Smart Charging) 3. Distributed energy storage (V2H, V2G)
-‐-‐> Integra�on of EVs to Load Frequency Control
Autonomous distributed grid-‐friendly charging / V2G (df, SOC) Centralized dispatching of TBC signal Regional aggregated storage (SOC synchroniza�on, V2V)
-‐-‐> -‐-‐> Implementa�on of Control Schemes to exis�ng Electric Vehicle / Charging Infrastructure
Evalua�on of response, efficiency, and impact to ba�ery Confirma�on of control and communica�on interface
Background and Purpose of Research 2/8
Schema�c Diagram of EV / Infrastructure Test System 3/8
Ba�ery Pack
EV-‐ECU
BMU
Quick Charging Port
Bi-‐direc�onal Power Condi�oner
1φ200V/15A/3kW Grid Interconnec�on DC 330V/16kWh
Grid-‐Friendly Charging / V2G
CAN Serial
SOC
V2G setpoint
Smart Interface Controller
Frequency
PT
SOC
Ethernet
LFC
SOC Es�ma�on
Small-scale Power System
PhotovoltaicWindBatteryNuclearHydroThermalWind Park
Central Load Dispatching Center
Regional Load Dispatching Center
Selec�ve LFC SOC Ordering
Autonomous Distributed Control
Centralized LFC
Coordina�on (and/or)
Smart Grid Digital Simulator
Electric Vehicle Ba�ery Test-‐bed
CHAdeMo Sequence
AC Power Source
Programmable /Frequency /Amplitude /Disturbance
Hardware In the Loop Simula�on (HILS)
Laboratory Setup 4/8
Electric Vehicle Ba�ery Test-‐bed
Bi-‐direc�onal Power Condi�oner
Quick Charging Port (CHAdeMO protocol)
Smart Interface Controller
Smart Grid Digital Simulator
GroundCharger,start/stop1
Charging,enable/disableDC,power,(+)DC,power,(:)
Connec<on,check,
Charger,start/stop2
CAN,(H)CAN,(L)
Time Sequences of Communica�on and Control
Electric Vehicle
Power Condi�oner
Smart Interface
Digital Simulator
CHAdeMO Sequence (Ini�a�on) Safety Check, CAN : Ini�al State, …
Full/Empty SOC, Stop, Emergency, … CHAdeMO Sequence (Termina�on)
CAN : SOC, etc
Sensing : Frequency
Serial : V2G setpoint Every 0.1 [s]
Every 10 [μs]
UDP/IP : SOC
Ex. Every 10 [m
in]
UDP/IP : LFC
Every
30 [s]
Every 0.1[s]
CAN : etc
42[bit]/19200[bps]
5/8
AC#Pow
er#[W
]#
Frequency#devia6on#[Hz]#
Charge'
Discharge'
0
Grid-‐Friendly Charging / V2G Scheme 6/8
V2G mode
Dead Band
1000 [W]
-‐1000 [W]
2000 [W]
3000 [W]
-‐2000 [W]
-‐3000 [W]
Smart Charging mode
0.05 [Hz]
-‐0.05 [Hz]
Droop Gain : 60000 [W/Hz]
Droop Gain : 20000 [W/Hz]
0 1 2 3 4 5 649.9
49.9550
50.0550.150.1
Freq
uenc
y [H
z]
0 1 2 3 4 5 6−4000−3000−2000−1000
01000200030004000
AC P
ower
[W]
3.3 3.31 3.32 3.33 3.34 3.35 3.36 3.37 3.38 3.39 3.43.4−4000−3000−2000−1000
01000200030004000
AC P
ower
[W]
0 1 2 3 4 5 60
2550
75100
SOC[
%]
Experimental Results of Grid-‐Friendly Charging 7/8
Time [h]
Set point Actual output
V2G mode : 91.60 [%] SC mode : 95.43 [%] Efficiency
Set point Actual output
(a)
(b)
(c)
(d)
G2V
V2G
Yutaka OTA [email protected]‐tokyo.ac.jp
Conclusions 8/8
Smart Charging / V2G available Off-‐board Charger
Seamless, flexible, efficient charging and discharging control -‐-‐> Coordinated control with HILS considering centralized LFC
Communica�on and Control Interface for V2G
AC or DC ? PLC or CAN ? Protocol with u�lity / aggregator ?