The enhancement of economic sustainability and the reduction of GHG emissions in most of the small isolated regions strongly depends on reducing their use of imported fossil fuels. To evaluate the effectiveness of interconnecting small islands in promoting renewable penetration levels increase and cost reductions, this work proposes a multiyear expansion-planning optimization model for the Azores archipelago that considers: 1) the interconnection between the different islands using DC submarine power cables; and 2) the addition of new in-land renewable power plants. The main goal of these expansion plans is to minimize the power system's investment and operational costs. Obtained results showed that interconnections between small isolated power systems (even if not with mainland grids) strongly contribute to a to a more sustainable performance of these regions from both the economic and environmental perspectives.

中文翻译：

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接近 100% 可再生能源的孤立电力系统的优化规划

大多数偏远小地区经济可持续性的增强和温室气体排放的减少在很大程度上取决于减少进口化石燃料的使用。为了评估互连小岛屿在促进可再生能源渗透水平提高和成本降低方面的有效性，这项工作提出了亚速尔群岛的多年扩张规划优化模型，该模型考虑了：1）不同岛屿之间使用直流海底电力电缆互连；2) 增加新的陆上可再生能源发电厂。这些扩展计划的主要目标是最大限度地减少电力系统的投资和运营成本。