[HTML][HTML] Optimization algorithms as robust feedback controllers

A Hauswirth, Z He, S Bolognani, G Hug… - Annual Reviews in Control, 2024 - Elsevier
Mathematical optimization is one of the cornerstones of modern engineering research and
practice. Yet, throughout all application domains, mathematical optimization is, for the most …

Model-free nonlinear feedback optimization

Z He, S Bolognani, J He, F Dörfler… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Feedback optimization is a control paradigm that enables physical systems to autonomously
reach efficient operating points. Its central idea is to interconnect optimization iterations in a …

[HTML][HTML] Multi-timescale coordinated distributed energy resource control combining local and online feedback optimization

S Zhan, J Morren, W van den Akker… - Electric Power Systems …, 2024 - Elsevier
Recently, online feedback optimization (OFO) emerges as a promising approach for real-
time distribution grid management. OFO offers several advantages, including not requiring …

Gradient-free accelerated event-triggered scheme for constrained network optimization in smart grids

C Hu, X Zhang, Q Wu - IEEE Transactions on Smart Grid, 2023 - ieeexplore.ieee.org
This paper proposes a novel projected primal-dual approach for a class of constrained
network optimization problems in smart grids without explicit system models, aiming at …

Optimal power flow pursuit via feedback-based safe gradient flow

A Colot, Y Chen, B Cornélusse, J Cortés… - … on Control Systems …, 2024 - ieeexplore.ieee.org
This article considers the problem of controlling inverter-interfaced distributed energy
resources (DERs) in a distribution grid to solve an ac optimal power flow (OPF) problem in …

Improve single-point zeroth-order optimization using high-pass and low-pass filters

X Chen, Y Tang, N Li - International Conference on Machine …, 2022 - proceedings.mlr.press
Single-point zeroth-order optimization (SZO) is useful in solving online black-box
optimization and control problems in time-varying environments, as it queries the function …

Gray-box nonlinear feedback optimization

Z He, S Bolognani, M Muehlebach, F Dörfler - ar** saddle points in zeroth-order optimization: the power of two-point estimators
Z Ren, Y Tang, N Li - International Conference on Machine …, 2023 - proceedings.mlr.press
Two-point zeroth order methods are important in many applications of zeroth-order
optimization arising in robotics, wind farms, power systems, online optimization, and …

Online feedback optimization over networks: A distributed model-free approach

W Wang, Z He, G Belgioioso, S Bolognani… - arxiv preprint arxiv …, 2024 - arxiv.org
Online feedback optimization (OFO) enables optimal steady-state operations of a physical
system by employing an iterative optimization algorithm as a dynamic feedback controller …

Safe model-free optimal voltage control via continuous-time zeroth-order methods

X Chen, JI Poveda, N Li - 2021 60th IEEE Conference on …, 2021 - ieeexplore.ieee.org
To maintain voltage security with limited system model information, we develop a model-free
optimal voltage control algorithm based on projected primal-dual gradient dynamics and …