IEEE APPEEC 2015, Brisbane 15th – 18th November 2015 Hybrid Energy Storage for Stand-alone PV Microgrid: Optimization of Battery Lifespan through Dynamic Power Allocation Wenlong JING Faculty of Engineering, Computing & Science Swinburne University of Technology (Sarawak Campus) 1
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Hybrid Energy Storage for Stand-alone PV Microgrid: Optimization of Battery Lifespan through Dynamic Power Allocation
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IEEE APPEEC 2015, Brisbane 15th – 18th November 2015
Hybrid Energy Storage for Stand-alone PV
Microgrid: Optimization of Battery Lifespan
through Dynamic Power Allocation
Wenlong JING
Faculty of Engineering, Computing & Science
Swinburne University of Technology
(Sarawak Campus)
1
IEEE APPEEC 2015, Brisbane 15th – 18th November 2015
CHALLENGES AND ISSUES IN STAND-ALONE MICROGRID
•Stochastic and intermittent nature of renewable energy sources.
•Highly dynamic load profile due to low capacity.
Microgrid
Energy Storage Systems • Chemical Battery, supercap, flywheel, pumped
hydro, CAES etc..
• Absorb surplus energy / Supply when deficit
• Regulate line voltage and frequency
• Maintain power quality
PV (DC)
Wind Turbine (AC)
Loads (AC + DC)
Energy Storage (DC)
2
IEEE APPEEC 2015, Brisbane 15th – 18th November 2015
3
STAND-ALONE PV SYSTEM TOPOLOGIES
PV System with Battery Alone
• Passive Connection (a)
• Add MPPT (b)
• Active Connection (c)
PV System with Hybrid Storage
• Passive Connection (d)
• Semi-Passive Connection
• Active Connection (e)
(d)
(e)
IEEE APPEEC 2015, Brisbane 15th – 18th November 2015
• High energy density + High power density
• Fast Response + Slow Response
[1] BoM, Bureau of Meteorology, Australian Government. Available [Online]