Generation and Transmission Expansion Planning in Remote Areas by considering Renewable Energy Policy and Local Energy Resources: The Case Study of Jayapura Power System

A generation and transmission expansion planning (G&TEP) is crucial to obtain economical, reliable, and sustainable power supply. Several factors, including renewable energy policy, archipelago country, uneven distribution of demand and energy resources, and remote areas, increase the complexity of G&TEP problems. Therefore, a G&TEP model by considering these factors is required. This study developed a G&TEP model by taking renewable energy policy and local energy resources into account. This model was implemented in the Jayapura power system to represent a system that is experiencing the aforementioned issues. In addition, the electricity generation in Jayapura is still dominated by high-cost diesel fuel. The research results show that the economical, reliable, and sustainable power supply in Jayapura can be achieved. The optimal result provides a generation cost of 8.4 cents USD/kWh. The renewable energy mix increases from 23% in 2025 to 60% in 2050. Biomass power plants, which utilize local energy sources, contribute the most to the renewable energy share. In addition, the expansion of the transmission line is 385.6 circuit kilometers long and is dominated by 70 kV lines. Furthermore, the 11 existing substations are expanded, and five new substations are built.