IECON Amjad Optimal planning and operatoin Management of a ship Electrical Power System with ESS
1. Optimal Planning and Operation
Management of a Ship Electrical Power
System with Energy Storage System
Amjad Anvari-Moghaddam, Tomislav Dragicevic, Lexuan Meng,
Bo Sun, and Josep M. Guerrero
Department of EnergyTechnology,Aalborg University
(aam@et.aau.dk)
2. Outline
2
Introduction
o Shipboard Microgrids
o Key Topics
System Overview
o Optimal planning and economic dispatch of a shipboard
power system
Test Scenario and Results
Conclusion
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3. Shipboard Microgrids
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Maritime
Vessels
Efficiency &
Emissions
Electric Propulsion
Fuel Cells
Gas Turbines
Renewables
Reliability &
Survivability
Redundant Design
New Architectures
Energy Storages
Control &
Automation
Energy Management
Generation Scheduling
5. Electric Layout
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Shipboard electric power plant
, , ,
( ) ;min max
DG i DG i DG i
P P t P i N
2
1 1, ,
( ) ( ) ( ) ( ) ( ( )) ( ) ( )
offi
i
i i
t
i oi oi G i oi G i i si si i i
FC SUSDC
OC t P t P t u t e u t u t
1 4 4 4 4 2 4 4 4 4 3 1 4 4 4 4 4 4 44 2 4 4 4 4 4 4 4 43
1 , ,
( ) ( ) ( ) ( ) /ESS ESS ESS ch ch ESS dch dch
E t E t P t T P t T
0
0 1
0
, ,max
, ,max
,max
,max ,max ,max
( ) ( )
( ) ( )
( )
ESS ch ch ESS
ESS dch dch ESS
ESS ESS
ch dch ESS
P t P u t
P t P u t
E t E
P P P
AC Side
DC Side
6. Chronological Load Curve
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0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
6
7
8
9
10
11
12
13
14
15
Time (minutes)
Power[MW]
Total Load
Measured Load
Average Demand
Case A
Case B
Case C
Case D
Electrical load demand of the drill-ship for several mission profiles:
• Case A- normal DP & normal drilling;
• Case B- heavy DP & normal drilling,
• Case C- heavy DP & heavy drilling;
• Case D- survival
1
1 2(t). ( ). ( ) ; , ,...,
j
j
t
D Dt
p dt P j T j j M
7. Optimal Design and Operation
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,max ,max
,max ,max
( )
ESS ESS
i E ESS P ESS
t T i N
Min OC t C E C P
, , ,
( ) ( ) ( ) ( ) ( ) ;DG i ESS dch ESS ch D OL
i N
P t P t P t P t P t t T
• Costs for installing ESS based on flywheel technology: 1600$/kWh and
600$/kW.
8. Simulation Results
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(a) Plant #1- DG 1&2 (b) Plant #2- DG 3&4 (C) Plant #3- DG 5&6
Economic dispatch of DGs (in MW) during 5-minute intervals (Ti) for the given load profile
DGi
αoi
(¢)
βoi
(¢/kW)
γoi
(¢/kW2
)
αsi
(¢)
βsi
(¢)
,
min
DG i
P
(MW)
,
max
DG i
P
(MW)
Plant #1
1 450 10 13.5 10 20 0 7
2 430 12 13.0 12 24 0 7
Plant #2
3 460 12 13.5 12 18 0 7
4 390 58 5.6 11 19 0 7
Plant #3
5 370 57 5.4 11 21 0 7
6 340 52 5.2 12 20 0 7
9. Optimal operation of ESS
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0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
-4
-2
0
2
4
6
8
10
12
14
16
1 3 5 7 9 11 13 15
SOC(%)
Demand&ESSOutputPower(MW)
Time Intervals
Load P_ESS SOC
• During off-peak times (e.g., 0-15 min. in normal DP and drilling mode), the storage
unit mainly operates in charging mode to increase the back-up power for critical
periods.
• During heavy DP or drilling times, the ESS is switched into discharge mode and
shaves the peaks off of the load giving the DGs smoother operation and better
performance.
• Optimal values for PESS,max and EESS,max were found to be 1.407 MW and 2.579 MWh,
respectively.
10. Conclusion
10
• Compared to the conventional approaches, the proposed method:
addressed the question of how much energy storage to
install,
provided insight into the scheduling of different electric
power plants in a drilling vessel thorough various loading
levels and mission profiles.
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11. Thank You
for
Your Attention
Amjad Anvari-Moghaddam, Tomislav Dragicevic, Lexuan Meng, Bo Sun, and Josep M.
Guerrero
aam@et.aau.dk
The 42nd Annual Conference of
IEEE Industrial Electronics
Society