Achieving New and Renewable Energy Target: A Case Study of Java-Bali Power System, Indonesia

New and renewable energy (N&RE) become alternative energy to reduce the dependency on fossil energy in the power sector. However, many countries have encountered obstacles in the process of reducing dependency. The obstacles that arise are very specific depending on the conditions of the country. Therefore, the strategies are taken by each country also different. An example is in Indonesia. Indonesia’s National Energy Policy (NEP) has a mandate to achieve N&RE target of 23% in 2025 and 31% in 2050. Because of the unique characteristic of Indonesia, the strategies to achieve these targets differ from other countries. This research used the Java-Bali power system in Indonesia as a case study to find the strategies. A generation expansion planning (GEP) by considering alternative strategies to achieve the target in Java-Bali has been conducted. This research used the MoMANI-OSeMOSYS as a GEP model. Three scenarios have been developed: business as usual (BAU), renewable energy (RE), and new and renewable energy (N&RE) scenario. The results show that the implementation of the N&RE target causes the generation cost increase and the CO2 emission decrease. Achieving the N&RE target requires the role of nuclear energy.