Stage 3 simulations
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Transcript of Stage 3 simulations
Energy Management StrategiesSTAGE 3 – Simulations in Matlab
IntroductionThis is a follow up on my previous slide shares. This
slide share will be a summary on all the simulations done for my thesis.
The other slide shares can be found here:http://tiny.cc/bihpj
EMS Strategies The three Energy Management Strategies are:
Dynamic Programming (DP)
ECMS
Range Extender (RE)
Vehicle used is a Hytruck
Driving cycles used are CSC and Je05
Configurations used:
CSC: Fuel Cell: 45 kW, Battery: 60 kW
Je05: Fuel Cell: 55 kW, Battery: 55 kW
Configurations were most fuel efficient for the cycle
CSC - DP
-60000
-40000
-20000
0
20000
40000
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80000
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5 255 505 755 1005 1255 1505
Po
we
r [W
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Time [s]
CSC DP
Pdem
Pfc
Pbt
CSC - ECMS
-60000
-40000
-20000
0
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60000
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5 255 505 755 1005 1255 1505
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CSC ECMS
Pdem
Pfc
Pbt
CSC - RE
-60000
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0
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1 51 101 151 201 251 301
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r [W
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Time [s]
CSC DP
Pdem
Pfc
Pbt
Je05 - DP
-100000
-80000
-60000
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0
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0 250 500 750 1000 1250 1500 1750
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Je05 DP
Pdem
Pfc
Pbt
Je05 - ECMS
-100000
-80000
-60000
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0
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0 250 500 750 1000 1250 1500 1750
Po
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Time [s]
Je05 ECMS
Pdem
Pfc
Pbt
Je05 - RE
-100000
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0 50 100 150 200 250 300 350
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Time [s]
Je05 RE
Pdem
Pfc
Pbt
Results The battery energy content was maintained during
every simulation
The ECMS results on the Je05 is lower , likely caused by the nature of the Je05 cycle as this happens in other vehicle configurations as well.
Cycle: Dynamic
Programming
ECMS Range
Extender
CSC 426.9 g
(100%)
432.7 g
(101.4%)
461.4 g
(108.0%)
Je05 547.7 g
(100%)
546.8 g
(99.8%)
576.3 g
(105.2%)
Results - discussion ECMS provides results that approach DP, though
ECMS can be applied online
The Range Extender is a lot easier to implement (set at a fixed, right chosen power level), but comes at a higher fuel cost
Measurements only done for Range Extender EMS, due to technical difficulties it was not possible to control the fuel cell power dynamically enough to do the DP and ECMS settings on the test rig
Future / RecommendationsNext:
Finalize report
Recommendations:
Increase level of control on the exact power of the fuel cell (enabling DP / ECMS measurements)
Increase measurement/estimation on the energy content of the battery to verify battery status after measurement