Grid integration of distributed PV-generation

The increasing relevancy of renewable energy sources in the production of electricity and therewith the increasing decentralized in-feed of energy modifies the request on electrical grids more and more. Especially photovoltaic had a rapid increase in the last years. In Germany with only a few exceptions photovoltaic is installed in the low and medium voltage level grid. For instance along with this there could be voltage problems in low voltage grids like temporarily high voltages at the end of long feeder lines. This kind of problem could be solved with an intelligent reactive power control of the inverters. Also the support of the grid in case of balancing and frequency deviations by decentralized energy production obtains relevancy. Photovoltaic facilities as well have to take active part in stabilization the frequency and voltage. Therefore an understanding of the behavior of PV generation with a large spatial spread is necessarily. This article presents an analysis of statistical behavior of distributed PV generation as well as changing in grid operation and shows how it is possible to counteract with already existing techniques.