Flexibility Assessment of a Solar PV Penetrated IEEE 9-Bus System Using Dynamic Transient Stability Evaluation

Power system (PS) were traditionally constituted of central points of generation, mainly making use of coal and/or nuclear sources. Current networks integrate renewable energy sources (RES), to respond to both the worldwide exponentially increasing power demand and the need for clean energy sources. Increased penetration of RES into PS grids, brings up operational issues that affect inter-alia stability conditions and subsequently calling for relevant measures to maintain resilience. This paper investigates and assesses the impact of increasing solar PV penetration on the network dynamic transient stability. Firstly, the results reveal that the system’s transient stability of a PV integrated network is severely affected under fault conditions and for a given penetration level, the condition is exacerbated as the fault location progresses near the PV system. The results thereafter show that for the same fault location, the dynamic transient stability is worsening with the percentage increase of the PV penetration’s 1evel.