Phasor Modelling Approaches and Simulation Guidelines of Voltage-Source Converters in Grid-Integration Studies

TL;DR

This paper reviews and compares EMT and Phasor models of Voltage-Source Converters for grid integration, providing guidelines for their suitability and simulation practices in power system studies.

Contribution

It offers a comprehensive comparison of EMT and Phasor models, including guidelines for their application and analysis of their suitability in different system scales and transient overlaps.

Findings

Phasor models are suitable for steady-state and slow transient studies.

EMT models are necessary for detailed electromagnetic transient analysis.

Guidelines for selecting appropriate models and simulation time steps are provided.

Abstract

This paper reviews Voltage-Source Converters (VSCs) EMT and Phasor models currently used to simulate converter-interfaced generation (CIG) and renewable energy resources integration to power systems. Several modelling guidelines and suitability analyses were provided based on a comprehensive comparative study among the models. Various studies were performed in a small system and a large system, modelled in Simulink. We address a gap related to the suitability of CIGs phasor models in studies where the boundary between electromagnetic and electromechanical transients overlap. An insightful analysis of the adequate simulation time step for each model and study is also provided, along with several simulation guidelines.