Integration of PV systems into low voltage networks using standard load profiles

Abstract

The impact of a higher share of distributed generation units is shown using the example of PV systems. A LV network with partly meshed and partly radial topology has been examined. Standard load profiles have been applied to obtain results with a resolution of 15 minutes. Feed-in profiles are compared with a data set based on measured values to model PV generation. Two extreme cases for transformer loading and compliance with voltage limits are high load (winter) without PV and low load (summer) with PV feed-in. In the latter case, power flow via the transformer was reversed during certain periods of the day. At the same time, voltage was increased especially at a long electrical distance from the transformer.