Modeling and validation of photovoltaic plants using generic dynamic models

Dynamic simulation models of photovoltaic plants are needed during the design stage of the plant, to show compliance with grid code requirements, as well as after commissioning, to validate the model response with the real plant performance. Due to the large number of PV installations and inverter models, there is a strong need to move from specific manufacturer´s user models to generic models, as the ones proposed by the Western Electricity Coordinating Council (WECC). This paper discusses the need for generic models, introduces the photovoltaic plant model developed by WECC and presents a case of generic model parameterization and validation of a commercial three-phase inverter, based on factory test. The simulation results show the validity of the generic model to reproduce the Low Voltage Fault Ride Through (LVFRT) capability of the inverter.