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

TL;DR

This paper compares various modeling approaches for power system components with renewable sources, evaluating their accuracy and computational efficiency for grid-connection studies.

Contribution

It provides a comprehensive comparison of models for generators, converters, and renewable plants, highlighting their suitability for dynamic grid simulations.

Findings

Different models vary in accuracy and computational time.

PV and wind dynamics significantly influence grid variables.

The study identifies optimal models for specific simulation scenarios.

Abstract

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 photovoltaic (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 and computational time through simulations of load connection, short-circuits, disconnection of generators and lines in a benchmark system modelled in Simulink.