Abstract
In this paper the influence of photovoltaic (PV) power system connection on power flows and voltage stability using the DIgSILENT Power Factory software package are presented. If PV system is well dimensioned, it could improve voltage in a distribution node, but it also could have many negative impacts to the power system. There are three basic criteria for connecting a PV system to a distribution network: rapid voltage changes, high harmonic generations and flickers. The analysis was performed on a part of the real distribution system. The system consists of transformer stations 35/10 kV and 10/0.4 kV, consumers connected to low voltage level (0.4 kV), cables and overhead lines. Four cases were examined: normal conditions, connection of 10 kW PV power system, 20 kW PV power system and connection of 6 PV power systems with total power of 100 kW.
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