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.