International tendencies on energy security: a review on national energy policies in the electrical sector

Energy security constitutes a priority within national energy policies. The international trend of energy transitions has fostered electrification of the energy systems, so it results imperative to study how the concept of energy security is implemented by means of power system strategies. This article presents a review on seven different national security strategies focused in the power system, thus different approaches in the matter may be contrasted and discussed. An outlook of the current situation in the selected nations is also presented through the review of their power system structures and electricity generation data. Common paths among the national covered strategies are identifiable as a result of the study, including the deployment of renewable energies installations, improving efficiency and, more geographically restricted, the shale revolution. A frame able to qualify the strategies in a wide context would help policy makers to develop more country-specific strategies and to evaluate their effectiveness on procuring energy securit