Abstract

The high complexity of realistic-size power systems have led to simplified stability studies in order to obtain the system dynamic response within acceptable computational time and resources. In these studies, also known as Transient Stability (TS) assessments, simplified fundamental frequency (FF) simulations are carried out based on the assumption that fast transients do not affect system stability. This paper aims to verify the validity of traditional TS studies in power systems with high levels of converter-based variable generation technologies (VGTs). To do this, FF and detailed simulations are performed considering different penetration levels of photovoltaic (PV) generation. Simulations are carried out in the IEEE 9-bus system using DIgSILENT Power Factory.