Grid-Interactive Inverter Modeling for Power System Studies

This paper presents an overview of the minimal complexity level requirement for modeling generic grid-interactive inverter to conduct power flow, protection, stability and power quality studies. For each functional, control or protection block of the inverter system, it describes the appropriate level of complexity needed to perform each of the power system studies. This work serves as a foundation for the development of an inverter modeling tool box to facilitate power system studies in renewable energy projects. It intends to address the need of utilities to have access to adequate inverter models to perform accurate integration impact studies of photovoltaic or inverter-based wind projects.