Trends in decentalised Electrification ueberarbeitet · Trends in Decentralized Electrification...
Transcript of Trends in decentalised Electrification ueberarbeitet · Trends in Decentralized Electrification...
Trends in Decentralized Electrification
Michael Wollny, SMA Technologie AG, Niestetal
Industry Forum - Off Grid Power Supply for Rural Electrification -June 24th, 2005; Freiburg, Germany
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Main Industry Areas of China
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Main Power Supply Network of Senegal
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State of the Art
Electricity consumers have predominantly been supplied by remote central power stations
Increase of the distribution grids is cost intensive and often not economical
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What we need are...
Decentralised small generation systems for combined heat and power production
Power supply systems located nearby the consumers and effectively using the local available energy sources (especially renewable energy)
Solutions are needed which are technically feasible andmmatch the conditions of sustainability
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Modular AC compatible Hybrid System Technology
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Modular AC compatible Hybrid System Technology
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Grid Connected PV Systems
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Principle of Grid Feeding
... up to the megawatt range
... from the pioneer of String
Technology
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Stand alone and Island Grid Applications
PV-Module Battery (12 V)
Charge Controller
DC-Loads, 12 … 48 V
Optional
Inverter
AC-Loads, 120/ 230 V60/ 50 Hz
Solar Home Systems with option of AC Generation
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Stand alone and Island Grid Applications
Small AC power supply system with DC coupled components
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AC-coupled Hybrid System for Standalone Application
Power range: 4 - 50 kW
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AC-coupled Hybrid System as Utility Backup
Power range: 4 - 50 kW
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Sunny Island Maxi for upper kW Power ranges
Power range: 40 - 250 kW
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Advantages of Flexible Modular AC-coupled Systems
Structure 100 % compatible with the public grid
Coupling all consumers and generators on the AC-side
Power range above several kW´s
Different renewable and conventional energy sources form a hybrid system
Highest reliability due to redundant system configuration
All components add up their power in parallel operation
Using the standard PV string technology
Construction of distributed networks
Easy expandability, suitable to be connected to the public grid
Reduction of system costs
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Reduction of System Costs
0
0,001995 2000 2005 2010
Year1990
,50
1,00 200
100
PV Inverter (1...10 kW)
Specific Price
Spec
ific
Pric
e [€
/W]
AC
Prod
uctio
n Q
uant
ity [
1000
Pie
ces/
a]
Standalone systems and small Off-Grid Plants in the kW range are cost effective than systems using diesel generators
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Modular PV Systems in China in the next Year
Installation of further 200 modular PV-Hybrid Systems in provinces of China (Yunnan, Xinjiang, Gansu and Qinghai)
Yunnan
Xinjiang
Gansu andQinghai