trends in decentalised electrification ueberarbeitet · trends in decentralized electrification...
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Trends in Decentralized Electrification
Michael Wollny, SMA Technologie AG, Niestetal
Industry Forum - Off Grid Power Supply for Rural Electrification -June 24th, 2005; Freiburg, Germany
2Trends in Decentralised Electrification
Main Industry Areas of China
3Trends in Decentralised Electrification
Main Power Supply Network of Senegal
4Trends in Decentralised Electrification
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
5Trends in Decentralised Electrification
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
6Trends in Decentralised Electrification
Modular AC compatible Hybrid System Technology
7Trends in Decentralised Electrification
Modular AC compatible Hybrid System Technology
8Trends in Decentralised Electrification
Grid Connected PV Systems
9Trends in Decentralised Electrification
Principle of Grid Feeding
... up to the megawatt range
... from the pioneer of String
Technology
10Trends in Decentralised Electrification
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
11Trends in Decentralised Electrification
Stand alone and Island Grid Applications
Small AC power supply system with DC coupled components
12Trends in Decentralised Electrification
AC-coupled Hybrid System for Standalone Application
Power range: 4 - 50 kW
13Trends in Decentralised Electrification
AC-coupled Hybrid System as Utility Backup
Power range: 4 - 50 kW
14Trends in Decentralised Electrification
Sunny Island Maxi for upper kW Power ranges
Power range: 40 - 250 kW
15Trends in Decentralised Electrification
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
16Trends in Decentralised Electrification
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
17Trends in Decentralised Electrification
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