hybrid power systems and renewable energy: prospects from the irena point of view roland roesch...

Hybrid power systems and renewable energy:Prospects from the IRENA point of view

Roland Roesch IRENA Innovation and Technology Centre (IITC)RRoesch@irena.org16. 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 !rroesch@irena.org

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)