Voltage Profile and Power Losses Analysis on a Modified IEEE 9-Bus System with PV Penetration at the Distribution Ends

Historically, distribution networks were made to connect consumer loads with no generating units at the point of consumption. For the last two decades, in response to increase electricity demand and environmental policies, decentralized generation, mainly constituted of Renewable Generation Sources (RES), also called Distributed Generators (DG), have massively and rapidly developed. The integration of DG units however, increase uncertainty in power system operation as they modify both the structure and the operation of the distribution networks, changing the magnitude and direction of network power flows. There is a need to investigate both the “effects and impact” of increasing penetration and siting of these intermittent RES on voltage and frequency stability power system and, the utilization of such sources to improve voltage stability margins. This paper presents different scenario of voltage stability studies in a static analysis mode in order to support voltage profile and reduce power line losses using photovoltaic systems. DigSILENT™ PowerFactory™ was used to conduct the investigation.