Small PV plant and network interaction study by means of DIGSILENT Power Factory sw tool

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Prikler László
Department of Electric Power Engineering

The technology of solar cells was discovered at the end of the 19th century, however it has only become widespread in the last two decades. That happened largely due to Germany taking the lead in utilizing renewable energy sources, thus providing a huge consumer market. As demand grew, module prices started to fall. First generation silicon-based solar cells dominate the market nowdays thanks to the developed background and mass production. In the past decade a significant drop in solar prices has occurred due to a similar increase of built-in capacity.

Solar systems also spread more and more in residential usage affecting the public distribution network, the regulations of which need to be met by the distribution licensee. At present, the network is used as storage for balancing production and consumption, therefore the aim of system design is to balance the annual energy equilibrium.

In my dissertation I present the different technologies and market conditions, and then look at the regulation of residential-scale small power plants in Hungary. I study the effect of solar power systems fed to the public distribution network in a simulated environment (DIGSILENT Power Factory) where I present the relation of voltage and loss of a given transformer zone to different consumer and input profiles.


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