A Coordinate-Descent Algorithm for Tracking Solutions in Time-Varying Optimal Power Flows
Abstract
Consider a polynomial optimisation problem, whose instances vary continuously over time. We propose to use a coordinate-descent algorithm for solving such time-varying optimisation problems. In particular, we focus on relaxations of transmission-constrained problems in power systems. On the example of the alternating-current optimal power flows (ACOPF), we bound the difference between the current approximate optimal cost generated by our algorithm and the optimal cost for a relaxation using the most recent data from above by a function of the properties of the instance and the rate of change to the instance over time. We also bound the number of floating-point operations that need to be performed between two updates in order to guarantee the error is bounded from above by a given constant.
Cite
@article{arxiv.1710.07119,
title = {A Coordinate-Descent Algorithm for Tracking Solutions in Time-Varying Optimal Power Flows},
author = {Jie Liu and Jakub Marecek and Andrea Simonetto and Martin Takac},
journal= {arXiv preprint arXiv:1710.07119},
year = {2019}
}