2026-06-02T12:04:08Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/317932026-02-03T10:57:14Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Pineda-Morente, Salvador author Morales-González, Juan Miguel author Porras, Álvaro author Domínguez, Concepción author 2024 This paper addresses the Optimal Transmission Switching (OTS) problem in electricity networks, which aims to find an optimal power grid topology that minimizes system operation costs while satisfying physical and operational constraints. Existing methods typically convert the OTS problem into a Mixed-Integer Linear Program (MILP) using big-M constants. However, the computational performance of these approaches relies significantly on the tightness of these big-Ms. In this paper, we propose an iterative tightening strategy to strengthen the big-Ms by efficiently solving a series of bounding problems that account for the economics of the OTS objective function through an upper-bound on the generating cost. We also discuss how the performance of the proposed tightening strategy is enhanced if reduced line capacities are considered. Using the 118-bus test system we demonstrate that the proposed methodology outperforms existing approaches, offering tighter bounds and significantly reducing the computational burden of the OTS problem. Salvador Pineda, Juan Miguel Morales, Álvaro Porras, Concepción Domínguez, Tight big-Ms for Optimal Transmission Switching, Electric Power Systems Research, Volume 234, 2024, 110620, ISSN 0378-7796, https://doi.org/10.1016/j.epsr.2024.110620 https://hdl.handle.net/10630/31793 https://doi.org/10.1016/j.epsr.2024.110620 Conmutación (Electricidad) Conmutación, Teoría de Tight big-Ms for optimal transmission switching