Modern power grids are fast evolving with the increasing volatile renewable generation,
distributed energy resources (DERs) and time-varying operating conditions. The DERs …

This paper presents a theoretical review and comparisons between vector fitting, matrix-
pencil-method, and Loewner matrix techniques for the fitting of frequency-domain functions …

In this work, we present a novel data-driven method for identifying parametric MIMO
generalized state-space or descriptor systems of low order that accurately capture the …

It is a well-known practice to approximate the frequency-domain response of an electrical
component or a subsystem with rational functions for electromagnetic transient (EMT) …

This paper proposes an inter-area oscillation damping control strategy by exploiting the
Loewner interpolation method (LIM) and Bellman's principle. The novelty of this …

We present an algorithm for passivity verification and enforcement of multivariate
macromodels whose state-space matrices depend in closed form on a set of external or …

This paper presents a qualitative overview of the main developments carried out by the
Brazilian Electrical Energy Research Center and the Brazilian Power System Operator to …

The Loewner matrix (LM) is a powerful macromodeling technique that uses sampled data in
the frequency domain for representing dynamical systems in a descriptor form. As stability …

Loewner matrix (LM) interpolation-based macromodeling methods can generate an
accurate macromodel for large and complex structures. However, there is less flexibility in …

FastAAA is an algorithm for fitting rational-functions to a set of N data samples. In each step
of the algorithm, it computes an order n fit via a fast, O (Nn), update of the previous order n-1 …