460 citations · 2k across the 42 of their papers we have counts for
47 papers
Gray-Box Nonlinear Feedback Optimization
Zhiyu He, Saverio Bolognani, Michael Muehlebach +1
Feedback optimization enables autonomous optimality seeking of a dynamical system through its closed-loop interconnection with iterative optimization algorithms. Among various iter…
Dynamic Resource Allocation with Karma: An Experimental Study
Ezzat Elokda, Saverio Bolognani, Florian Dörfler +1
We perform a behavioral experiment of karma, a class of mechanisms for repeated resource allocation with attractive fairness and efficiency properties, in theory. Individuals in th…
Tuning and Testing an Online Feedback Optimization Controller to Provide Curative Distribution Grid Flexibility
Lukas Ortmann, Fabian Böhm, Florian Klein-Helmkamp +3
Due to more volatile generation, flexibility will become more important in transmission grids. One potential source of this flexibility can be distribution grids. A flexibility req…
Online Feedback Optimization over Networks: A Distributed Model-free Approach
Wenbin Wang, Zhiyu He, Giuseppe Belgioioso +2
Online feedback optimization (OFO) enables optimal steady-state operations of a physical system by employing an iterative optimization algorithm as a dynamic feedback controller. W…
Towards a Systems Theory of Algorithms
Florian Dörfler, Zhiyu He, Giuseppe Belgioioso +3
Traditionally, numerical algorithms are seen as isolated pieces of code confined to an {\em in silico} existence. However, this perspective is not appropriate for many modern compu…
Decentralized Feedback Optimization via Sensitivity Decoupling: Stability and Sub-optimality
Wenbin Wang, Zhiyu He, Giuseppe Belgioioso +2
Online feedback optimization is a controller design paradigm for optimizing the steady-state behavior of a dynamical system. It employs an optimization algorithm as a dynamic feedb…
Tutorial on Congestion Control in Multi-Area Transmission Grids via Online Feedback Equilibrium Seeking
Giuseppe Belgioioso, Saverio Bolognani, Giulia Pejrani +1
Online feedback optimization (OFO) is an emerging control methodology for real-time optimal steady-state control of complex dynamical systems. This tutorial focuses on the applicat…
Strategic Interactions in Multi-modal Mobility Systems: A Game-Theoretic Perspective
Gioele Zardini, Nicolas Lanzetti, Giuseppe Belgioioso +4
The evolution of existing transportation systems,mainly driven by urbanization and increased availability of mobility options, such as private, profit-maximizing ride-hailing compa…
Providing Curative Distribution Grid Flexibility Using Online Feedback Optimization
Florian Klein-Helmkamp, Fabian Böhm, Lukas Ortmann +5
Distribution grid flexibility is discussed as a possible measure in curative system operation, yielding a need for an efficient and robust coordination mechanism for the joint flex…
A Classification of Feedback Loops and Their Relation to Biases in Automated Decision-Making Systems
Nicolò Pagan, Joachim Baumann, Ezzat Elokda +3
Prediction-based decision-making systems are becoming increasingly prevalent in various domains. Previous studies have demonstrated that such systems are vulnerable to runaway feed…
Deployment of an Online Feedback Optimization Controller for Reactive Power Flow Optimization in a Distribution Grid
Lukas Ortmann, Christian Rubin, Alessandro Scozzafava +3
Optimization is an essential part of power grid operation and lately, Online Optimization methods have gained traction. One such method is Online Feedback Optimization (OFO) which…
From droop to optimality: The potential of volt/var control for power distribution grid enhancement
Jonas G. Matt, Lukas Ortmann, Saverio Bolognani +1
When high amounts of active power are injected into power distribution grids, the overall power flow is limited because voltages reach their upper acceptable limits. Volt/var contr…
Online Feedback Optimization of Compressor Stations with Model Adaptation using Gaussian Process Regression
M. Zagorowska, M. Degner, L. Ortmann +4
Online Feedback Optimization is a method used to steer the operation of a process plant to its optimal operating point without explicitly solving a nonlinear constrained optimizati…
Subtransmission Grid Control via Online Feedback Optimization
Lukas Ortmann, Jean Maeght, Patrick Panciatici +2
The increasing electric power consumption and the shift towards renewable energy resources demand for new ways to operate transmission and subtransmission grids. Online Feedback Op…
Real-time Curative Actions for Power Systems via Online Feedback Optimization
Lukas Ortmann, Gianni Hotz, Saverio Bolognani +1
Curative or remedial actions are the set of immediate actions intended to bring the power grid to a safe operating point after a contingency. The effectiveness of these actions is…
How Bad is Selfish Driving? Bounding the Inefficiency of Equilibria in Urban Driving Games
Alessandro Zanardi, Pier Giuseppe Sessa, Nando Käslin +3
We consider the interaction among agents engaging in a driving task and we model it as general-sum game. This class of games exhibits a plurality of different equilibria posing the…
Online Feedback Equilibrium Seeking
Giuseppe Belgioioso, Dominic Liao-McPherson, Mathias Hudoba de Badyn +4
This paper proposes a unifying design framework for dynamic feedback controllers that track solution trajectories of time-varying generalized equations, such as local minimizers of…
First-order Conditions for Optimization in the Wasserstein Space
Nicolas Lanzetti, Saverio Bolognani, Florian Dörfler
We study first-order optimality conditions for constrained optimization in the Wasserstein space, whereby one seeks to minimize a real-valued function over the space of probability…
A self-contained karma economy for the dynamic allocation of common resources
Ezzat Elokda, Saverio Bolognani, Andrea Censi +2
This paper presents karma mechanisms, a novel approach to the repeated allocation of a scarce resource among competing agents over an infinite time. Examples include deciding which…
Model-Free Nonlinear Feedback Optimization
Zhiyu He, Saverio Bolognani, Jianping He +2
Feedback optimization is a control paradigm that enables physical systems to autonomously reach efficient operating points. Its central idea is to interconnect optimization iterati…
Posetal Games: Efficiency, Existence, and Refinement of Equilibria in Games with Prioritized Metrics
Alessandro Zanardi, Gioele Zardini, Sirish Srinivasan +4
Modern applications require robots to comply with multiple, often conflicting rules and to interact with the other agents. We present Posetal Games as a class of games in which eac…
Adaptive Real-Time Grid Operation via Online Feedback Optimization with Sensitivity Estimation
Miguel Picallo, Lukas Ortmann, Saverio Bolognani +1
In this paper we propose an approach based on an Online Feedback Optimization (OFO) controller with grid input-output sensitivity estimation for real-time grid operation, e.g., at…
A Dynamic Population Model of Strategic Interaction and Migration under Epidemic Risk
Ezzat Elokda, Saverio Bolognani, Ashish R. Hota
In this paper, we show how a dynamic population game can model the strategic interaction and migration decisions made by a large population of agents in response to epidemic preval…
Cross-layer Design for Real-Time Grid Operation: Estimation, Optimization and Power Flow
Miguel Picallo, Dominic Liao-McPherson, Saverio Bolognani +1
In this paper, we propose a combined Online Feedback Optimization (OFO) and dynamic estimation approach for a real-time power grid operation under time-varying conditions. A dynami…