Modeling and Simulation of “Portugal-Spain” Cross-border Electricity-Gas Coupling System

The energy systems in Portugal and Spain are closely connected, among which the power and gas grids are mutually standby and provide support to each other. According to the characteristics of the cross-border energy systems, this study conducted the research of the energy development and utilization in the two countries, and carried out the modeling and simulation of the whole cross-border energy grids. For the first time, the scenario of “Portugal-Spain” electricity-gas coupling system was established on an independently developed simulation platform—Integrated Energy System Analysis Software (IESAS), including the grids structure of the power and gas networks and the key coupling equipment elements. Besides, based on the software, the energy flow calculation of the “Portugal-Spain” energy networks were completed. The power network includes 888 buses, 1018 AC transmission lines and 323 loads. The natural gas network includes 200 gas nodes and 215 natural gas pipelines. This work provides a solid foundation for the optimization the load dispatching and the large-scale utilization of renewable energy between the two countries.