hybrid power systems and renewable energy: prospects from the irena point of view roland roesch...
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Hybrid power systems and renewable energy:Prospects from the IRENA point of view
Roland Roesch IRENA Innovation and Technology Centre (IITC)[email protected]. January 2013
Content
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1. The Challenge
2. Memory components of the hybrid systems
3. Structure of the hybrid systems
4. Combination of hybrid storage options (Example)
5. System Penetration
6. Integration Technology
1. The Challenge
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No technology (alone) solves the problem!
Combination of the most economical storage technologies, load- and generation management and additional producers / consumers to hybrid city store
Goal Needs Obstacles
Permanent spatial-temporal energy balance on the net!
• Energy Storage• Load Management• Generation
management• Network expansion
• Energy storage .... are (still) very expensive• Load Management ... difficult potentials• Production management .... large losses• Network expansion... costs, acceptance problems
Sources: • Adapted from: Fraunhofer UMSICHT, Hybrid urban energy storage, (May 2012)
2. Memory componentsof the hybrid systems
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Additive Generation: Application: for rare short-term peak Technology: For example. Emergency diesel generators (hospitals)
Dispatchable Generation: Application: for frequent short, high peak Technology: Power-/heat micro-CHP (Virtual Power Plants)
Energy Storage: Application: daily cyclical balance of load and generation Technology: For example. decentralized lithium battery or central redox
flow battery
Dispatchable Load: Application: compensate for frequent short, high production peaks Technology: For example. Power-/heat pumps, hot water tank
Additive Load: Application: compensate rare production peaks Technology: For example. District and local Heating with current heat
Sources: • Adapted from: Fraunhofer UMSICHT, Hybrid urban energy storage, (May 2012)
4. Combination of hybrid storage options
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Load[kW]
CHP = emergency power unitDH = district heating
Capacity[h]
“Sto
rage
” -lo
ad
Example:
Emergency diesel CHP Distributed lithium batteries Micro-CHP with thermal memory Central redox flow battery Heat pump with thermal memory Distributed lithium batteries DHW Current into the district heating network
Sources: • Adapted from: Fraunhofer UMSICHT, Hybrid urban energy storage, (May 2012)
6. Integration Technology
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Thank you for your attention [email protected]
3. Structure of the hybrid systems
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Hybrid memory:Sales of storage capacity
Central electrical memory e.g. Redox flow battery
Decentralized electrical memory e.g. Lithium-Ion Battery
Thermal storagee.g. Heat pumps, cogeneration, DHW
Additional loads:District and local heating
Flex controllerControls the subsystems
Sources: • Adapted from: Fraunhofer UMSICHT, Hybrid urban energy storage, (May 2012)
5. System Penetration
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Contribution Class Operating CharacteristicsContribution (%)
Peak instantaneous Annual average
Low• Diesel(s) run full-time• RES power reduces net load on diesel• All RES energy goes to primary load• No supervisory control system
<20 <20
Medium• Diesel(s) run full-time• At high RES power levels, excess energy must be
managed to ensure sufficient Diesel loading• Requires relatively simple control system
20-50 20-50
High• Diesel(s) may be shut down during high RES availability• Auxiliary components required to regulate voltage and
frequency• Requires sophisticated control system
100-400 50-150
Sources: • Adapted from: NERL, Integration of Wind into Diesel Power Systems, (August 2008)