Grid-connected converters: A brief survey of topologies, output filters, current control, and weak grids operation

GV Hollweg, SA Khan, S Chaturvedi, Y Fan, M Wang… - Energies, 2023 - mdpi.com
Grid-connected converters (GCCs) are used extensively for the integration of DC power
sources with AC power sources. However, since it is a complex topic, there are many …

Control Methodologies to Mitigate and Regulate Second-Order Ripples in DC–AC Conversions and Microgrids: A Brief Review

S Chaturvedi, M Wang, Y Fan, D Fulwani, GV Hollweg… - Energies, 2023 - mdpi.com
Second-order ripples occur in the voltage and current during any DC–AC power conversion.
These conversions occur in the voltage source inverters (VSIs), current source inverters …

A hybrid robust adaptive sliding mode controller for partially modelled systems: Discrete-time lyapunov stability analysis and application

DMC Milbradt, PJD de Oliveira Evald… - Nonlinear Analysis …, 2023 - Elsevier
This work presents a new discrete-time Hybrid Robust Adaptive Sliding Mode Controller,
developed from the union of a Robust Model Reference Adaptive Controller, an Adaptive …

A robust adaptive one sample ahead preview controller for grid-injected currents of a grid-tied power converter with an LCL filter

DMC Milbradt, GV Hollweg… - International Journal of …, 2022 - Elsevier
This paper presents the development of a discrete-time Robust Adaptive One Sample
Ahead Preview controller, based on the combination of a Robust Model Reference Adaptive …

Self-tuning methodology for adaptive controllers based on genetic algorithms applied for grid-tied power converters

GV Hollweg, PJD de Oliveira Evald, E Mattos… - Control Engineering …, 2023 - Elsevier
The performance and stability of adaptive controllers is highly dependent on its parameter
initialization. For non-expert designers, the parametrization of these controllers can be …

A hybrid robust model reference adaptive controller and proportional integral controller without reference model for partially modeled systems

PJDO Evald, GV Hollweg, RV Tambara… - … Journal of Adaptive …, 2023 - Wiley Online Library
This work presents the discrete‐time stability analysis of a hybrid robust model reference
adaptive controller and proportional‐integral controller (MRAC‐PI) controller using …

[HTML][HTML] Performance comparison of discrete-time robust adaptive controllers for grid-tied power converters under unbalanced grids

PJD de Oliveira Evald, GV Hollweg… - e-Prime-Advances in …, 2023 - Elsevier
Renewable energy generation systems largely use grid-tied power converters with LCL
filters. A well-known issue in this kind of system is the resonance of the LCL filter, whose …

An optimal initialisation for robust model reference adaptive PI controller for grid-tied power systems under unbalanced grid conditions

PJD de Oliveira Evald, GV Hollweg, LC Borin… - … Applications of Artificial …, 2023 - Elsevier
This paper presents an Optimal Robust Model Reference Adaptive Proportional–Integral
controller for grid-tied power systems, which is automatically parametrised using a Genetic …

Model reference adaptive controllers with improved performance for applications in LCL-filtered grid-connected converters

GV Hollweg, RV Tambara, JR Massing, LC Borin… - Control Engineering …, 2023 - Elsevier
This work presents a control strategy combining a direct Model Reference Adaptive Control
(MRAC) with a robust state feedback for current control of grid-connected converters with …

Lyapunov stability analysis of an RMRAC‐based adaptive sigmoid super‐twisting sliding mode under matched and unmatched uncertainties

G Vieira Hollweg… - … Journal of Robust …, 2024 - Wiley Online Library
This article presents a discrete‐time robust model reference adaptive controller and
adaptive sigmoid super‐twisting sliding mode (RMRAC‐ASSTSM) and its stability analysis …