ABSTRACT
A dramatic change is going on currently in the supply of electrical energy, generally called power supply. Informertimes,thispowersupplywasmainlyprovidedbyfewbigpowerstations.¥etechnologyof theautomationsystemsinsuchpowerstationswasdesignatedbyafewbigenterprises.¥esedaysmore andmoresmallpowersupplies(DER-distributedenergyresources)likewindpowerplants,combined heatandpower,hydropowerplants,photovoltaicsystems,fuelcells,andothersarebeingimplemented everywhere.
