Ana Mikulec, Vladimir Mikuličić

Abstract
This paper gives a brief overview of production facilities from renewable energy sources which especially influence the power system with variable production. The paper describes some basic ways of connection and technical data relevant for the design of production plants, as well as the most important influences on the power system, especially with respect to the following: voltage, short circuit current, operation of the system, losses and power quality. Basic concepts of reliability, mathematical models
and indicators of reliability are also given.
Keywords
availability, connection, impact, reliability, renewables