The equilibrium points and stability of grid-connected synchronverters

P Lorenzetti, Z Kustanovich, S Shivratri… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Virtual synchronous machines are inverters with a control algorithm that causes them to
behave towards the power grid like synchronous generators. A popular way to realize such …

Further results on incremental input-to-state stability based on contraction-metric analysis

M Giaccagli, D Astolfi, V Andrieu - 2023 62nd IEEE Conference …, 2023 - ieeexplore.ieee.org
In this paper, we study the notion of incremental stability for continuous-time nonlinear
systems forced by some external input. Thanks to the notion of “Killing vector field”, we …

Continuous approximations of projected dynamical systems via control barrier functions

G Delimpaltadakis, J Cortés… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Projected Dynamical Systems (PDSs) form a class of discontinuous constrained dynamical
systems, and have been used widely to solve optimization problems and variational …

On the relationship between control barrier functions and projected dynamical systems

G Delimpaltadakis, W Heemels - 2023 62nd IEEE Conference …, 2023 - ieeexplore.ieee.org
In this paper, we study the relationship between systems controlled via Control Barrier
Function (CBF) approaches and a class of discontinuous dynamical systems, called …

Saturating integral control for infinite-dimensional linear systems

P Lorenzetti, L Paunonen… - 2023 62nd IEEE …, 2023 - ieeexplore.ieee.org
We propose a saturating integrator based controller for infinite dimensional well-posed
linear systems, which prevents the controller state from leaving a desired closed interval …

Synchronverters with a virtual oscillator to attenuate power oscillations

H Yin, S Wang, Z Zhou - … of Emerging and Selected Topics in …, 2023 - ieeexplore.ieee.org
A virtual oscillator (VO) based frequency-locked loop (FLL) is proposed to estimate the grid
frequency and added to the control algorithm of a virtual synchronous machine (VSM) in …

Filtering in Projection-based Integrators for Improved Phase Characteristics

H Chu, SJA Eijnden, MF Heertjes… - arXiv preprint arXiv …, 2024 - arxiv.org
Projection-based integrators are effectively employed in high-precision systems with
growing industrial success. By utilizing a projection operator, the resulting projection-based …

A synchronverter-based magnitude phase-locked loop

P Lorenzetti, F Reissner, G Weiss - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
A magnitude phase-locked loop (MPLL) is a system that synchronizes its output signal in
frequency, phase, and magnitude with the dominant sinusoidal component of its input …

Projection-based controllers with inherent dissipativity properties

H Chu, S Van den Eijnden… - 2023 62nd IEEE …, 2023 - ieeexplore.ieee.org
Projection-based Controllers (PBCs) are currently gaining traction in both scientific and
engineering communities. In PBCs, the input-output signals of the controller are kept in …

On singularly perturbed systems that are monotone with respect to a matrix cone of rank

R Ofir, P Lorenzetti, M Margaliot - arXiv preprint arXiv:2303.11970, 2023 - arxiv.org
We derive a sufficient condition guaranteeing that a singularly perturbed linear time-varying
system is strongly monotone with respect to a matrix cone $ C $ of rank $ k $. This implies …