| Abstract |
The growing number of renewable energy production plants have caused a problem that conventionalinertia response to frequency variations has reduced. As a consequence the amplitude and frequency offrequency variations has grown. Renewable power plants such as wind and solar PV do not inherentlyrespond to the frequency variations. However, also renewable energy systems (RES) can take part onthe frequency regulation by including such controls to the system. In the current day power grid theconnected rotating synchronousmass, that is the inertia, represents certain amount of kinetic energy. Thisenergy can be replaced by synthetic inertia of RES, but the main questions are what kind of dynamics arerequired from the energy sources and are they capable of executing the required performance. Anotherissue is how different energy sources should take part in the frequency regulation. This paper focuseson the available kinetic energy in a grid where power production is based mostly on renewables. Keytechnologies investigated include wind, solar, and battery energy storages. As a result kinetic energiesfor each technology is calculated for small island environment that is assumed to operate independently. |
