Resumen del autor, extraído del trabajo. Worldwide, natural gas is more and more commonly used for power generation due to the huge natural gas reserve base, to the excellent economics and to its low environmental impact. However, natural gas reserves are increasingly remote from the consumption centres and with present technology it is possible to transport either the natural gas via a gas pipeline to the consumption centres and produce the electricity there, or to build the power plants next to the gas fields and transmit the electricity via high-voltage power lines to the consumption centres. This study compares these two energy vectors (electricity transmission versus natural gas transport) from a techno-economic point of view. This comprehensive analysis is carried out as a function of the energy flows to be transported, of the distance, of the wellhead price of gas, of the discount rate and other relevant parameters. Environmental issues are also discussed, as pipelines are generally underground whereas electricity lines are airborne, and as the power plant environmental impact is quite different for the two options. The aim of this study is therefore to evaluate the conditions favouring one option compared to the other.