Impact of Integrating Residential Solar PV Clusters on Voltage Profile in Urban Distribution Network

This paper investigates the effect of connection location and penetration level of residential solar PV clusters on the voltage profile of an urban distribution network. The network was modelled in DIgSILENT and various Quasi-dynamic simulations were performed. Residential cluster load profiles were stochastically modelled using random load profile generator equations. Results indicated that the highest voltage increments occur when PV clusters are connected downstream of the network. PV clusters connected upstream of the network result in a uniform improvement of the voltage profile along the length of the main LV feeder. Higher penetration levels reduce the morning voltage dip and increase the afternoon voltage peak. Overvoltage was observed at 300% penetration for the test network that was used.