Modelling Approaches of Power Systems Considering Grid-Connected Converters and Renewable Generation Dynamics

This paper presents a comparative analysis of several modelling approaches of key elements used in simulations of power systems with renewable energy sources. Different models of synchronous generators, transmission lines, converters, wind generators and PV power plants are compared to assess the most suitable models for grid-connection studies. It also analyses how the dynamics of PV power plants and the mechanical dynamics of wind generators affect the electrical variables on the grid side. The models were compared in terms of precision, computational time and ease of use through simulations of load connection, short-circuits, disconnection of generators and lines in a benchmark system modelled in Simulink.