29 citations · 44 across the 14 of their papers we have counts for
15 papers
On the Mechanism of Multi-Cluster System Separation Under Extreme Events
Nikolaos Sofos, Georgios Tzounas, Federico Milano
Historical blackout events demonstrate that, under complex multi-event contingencies, interconnected power systems can split into multiple areas exhibiting distinct dynamic behavio…
Sparse Continuation-Based Eigenvalue Tracking for Power System DDAEs
Andreas Bouterakos, Georgios Tzounas
In this paper, we formulate a continuation method for tracking eigenvalue trajectories in power system models with time-delayed measurement and control signals. Such delays are kno…
On the Eigenvalue Tracking of Large-Scale Systems
Andreas Bouterakos, Joseph McKeon, Georgios Tzounas
The paper focuses on the problem of tracking eigenvalue trajectories in large-scale power system models as system parameters vary. A continuation-based formulation is presented for…
Smooth Rate Limiter Model for Power System Stability Analysis and Control
Zaint A. Alexakis, Panos C. Papageorgiou, Antonio T. Alexandridis +2
The letter proposes a smooth Rate Limiter (RL) model for power system stability analysis and control. The proposed model enables the effects of derivative bounds to be incorporated…
Stability of the Theta Method for Systems with Multiple Time-Delayed Variables
Andreas Bouterakos, Georgios Tzounas
The paper focuses on the numerical stability and accuracy of implicit time-domain integration (TDI) methods when applied for the solution of a power system model impacted by time d…
Instantaneous Power Theory Revisited with Classical Mechanics
Federico Milano, Georgios Tzounas, Ioannis Dassios
The paper revisits the concepts of instantaneous active and reactive powers and provides a novel definition for basic circuit elements based on quantities utilized in classical mec…
Instantaneous Frequency Estimation in Unbalanced Systems Using Affine Differential Geometry
Ali Alshawabkeh, Georgios Tzounas, Angel Molina-Garcia +1
The paper discusses the relationships between electrical and affine differential geometry quantities, establishing a link between frequency and time derivatives of voltage, through…
Enhancing Frequency Control through Rate of Change of Voltage Feedback
Federico Milano, Bibi Alhanjari, Georgios Tzounas
This letter proposes a simple and inexpensive technique to improve the frequency control of distributed energy resources. The proposed control consists in modifying the conventiona…
Unified Numerical Stability and Accuracy Analysis of the Partitioned-Solution Approach
Georgios Tzounas, Gabriela Hug
This paper focuses on the Partitioned-Solution Approach (PSA) employed for the Time-Domain Simulation (TDS) of dynamic power system models. In PSA, differential equations are solve…
Mode-Shape Deformation of Power System DAEs by Time-Domain Integration Methods
Carlo Tajoli, Georgios Tzounas, Gabriela Hug
This paper studies the numerical deformation that time-domain integration (TDI) methods introduce to the shape of the coupling between the dynamic modes and variables of power syst…
On the Emulation of Synchronous Machine Dynamics by Converter-Interfaced Generators
Georgios Tzounas, Federico Milano
This paper discusses the conditions that a device needs to satisfy to replicate the behavior of a conventional synchronous machine (SM) connected to a power network. The conditions…
Using Differential Geometry to Revisit the Paradoxes of the Instantaneous Frequency
Federico Milano, Georgios Tzounas, Ioannis Dassios +2
This paper proposes a general framework to interpret the concept of Instantaneous Frequency (IF) in three-phase systems. The paper first recalls the conventional frequency-domain a…
Small-Signal Stability Analysis of Numerical Integration Methods
Georgios Tzounas, Ioannis Dassios, Federico Milano
The paper provides a novel framework to study the accuracy and stability of numerical integration schemes when employed for the time domain simulation of power systems. A matrix pe…
Applications of the Frenet Frame to Electric Circuits
Federico Milano, Georgios Tzounas, Ioannis Dassios +1
The paper discusses the relationships between electrical quantities, such as voltages, currents, and frequency, and geometrical ones, namely curvature and torsion. The proposed app…
Small-Signal Stability Techniques for Power System Modal Analysis, Control, and Numerical Integration
Georgios Tzounas
This thesis proposes novel Small-Signal Stability Analysis (SSSA)-based techniques that contribute to electric power system modal analysis, automatic control, and numerical integra…