A Matlab-based Toolbox for Automatic EMT Modeling and Small-Signal Stability Analysis of Modern Power Systems

TL;DR

This paper introduces a Matlab toolbox for automatic small-signal stability analysis of hybrid AC/DC power systems using EMT models, addressing the challenges posed by modern converter-rich grids.

Contribution

It presents a novel, automated modeling toolbox that enables comprehensive stability analysis of hybrid power systems considering electromagnetic transients.

Findings

Toolbox performs modal, impedance, and passivity analyses.

Demonstrated effectiveness through case studies of various system configurations.

Facilitates stability assessment of complex hybrid power networks.

Abstract

The intensive integration of power converters is changing the way that power systems operate, leading to the emergence of new types of dynamic phenomena and instabilities. At the same time, converters act as an interface between traditional AC grids and their more recent DC counterparts, giving rise to hybrid AC/DC networks. These conditions increase the necessity for stability analysis tools that can simultaneously account for the newly-introduced dynamic phenomena and can also be applied for the stability study of hybrid networks. This paper presents a Matlab-based toolbox for small-signal analysis of hybrid AC/DC power systems considering electromagnetic-transient (EMT) models. The toolbox allows the automatized modeling of the system from the input data and offers options for modal, impedance and passivity analyses. In the paper, the structure and internal processes of the toolbox are duly discussed, together with all its features, both main and complementary. Its capabilities for stability analysis are demonstrated via comprehensive case studies of converter-based system of various size and topology.