Programm Photovoltaik Ausgabe 2008 ... - Bundesamt für Energie BFE

Challenges
The liberalisation of the electricity market, combined with international pressure to reduce CO2 emissions,
lead to new architectures of the future electricity networks with a large penetration of distributed
energy resources, in particular from renewable sources. But the current integration of distributed energy
resources is performed in such a way that their intermittency impacts strongly on the grids, increasing
concerns about power quality and the security of supply by the end users. Reciprocally, poor
power quality from the grid impacts on the PV systems, reducing production, but moreover, it impacts
on the end user, its production, services and comfort.
Therefore the project intends to:
� minimise the impact of PV systems on the grid operation and planning;
� ensure security and quality of electricity supply to houses and buildings with PV installations;
� increase performance ratio of PV systems;
� increase penetration of PV in the networks.
Technical Approach
In the project 6 partners join efforts for developing a Security of Supply PV Inverter of which, at the
end of the project, 4 prototypes will have proved in field tests to provide both power quality and UPS
function to the house grid and to support the external grid on demand. The energy supply will be ensured
by storage systems for which the lithium-ion technology will be compared to a hybrid of leadacid
battery and supercapacitors in terms of performance and cost of ownership.
SoS-PV architecture with lithium-ion or lead-acid battery with supercaps
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SOS-PVI, P. Gaillard, Maxwell Technologies
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