The Role of Optimal Transmission Switching in Enhancing Grid Flexibility: A Review

The integration of variable renewable energy sources (RES) into power grids has resulted in a more complex operating environment for system operators (SO), necessitating the need increased grid flexibility. This is crucial utilities, as cost-effective utilization existing infrastructure necessary, given prolonged construction period and high investment costs associated with building new delivery facilities. Under umbrella smart grid, optimal transmission switching (OTS) technology that can alleviate concerns related to network congestion, limited capacity, penetration renewables. OTS concept integrated flow (OPF) problem such it provides SO choice temporarily switch one or lines out service from network. shown literature have economic benefits, reduce operational cost, relieve serve corrective mechanism reducing voltage violations, improve reliability, minimize loss. Despite significant attention by researchers over past decade, no extensive review paper exists on topic literature. Therefore, this state-of-the-art overview problem. explained approximating alternating current OPF linear direct Various alternative models proposed are discussed. also analyzes interaction between other flexibility options Dynamic thermal rating (DTR), Energy storage systems (ESS), RES. Furthermore, presents general framework impact short-term long-term expansion planning problems. Finally, an reliability provided.