COST OF VARIABLE RENEWABLE ENERGY IN INDONESIAN MICROGRIDS: KUNDUR, NUSA PENIDA, AND NIAS

• Main Author: Erland Yeshua Riwu Kaho, Talo
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71400
• Institution: Institut Teknologi Bandung

New and renewable energies (NRE) are central to today's energy world. The NRE price needs to be adjusted to increase NRE investment while remaining profitable for the state-owned electricity company. This price cannot be determined from the LCOE NRE alone. Technically, the intermittent nature of some new and renewable energy sources, such as solar and wind, will affect the operation of conventional generators in the system. NRE intrusion into the power system can reduce the load from existing generators, thereby affecting operating costs and fuel economy. This paper examines the technical and economic implications of penetrating variable renewable energy sources such as Photovoltaic Power Plant (PLTS) onto a microgrid system. The total cost of the existing system is first described, and then the system with variations in PLTS penetration, near the load and far from the load. This method was applied to the location of the case study, namely, Kundur. Increasing PV penetration will initially increase investment costs but reduce overall system costs. However, there is a penetration level where the total system cost is again higher if the penetration level exceeds this number. In the Kundur, Nusa Penida, and Nias systems, the optimum PLTS penetration rates were respectively 42%, 43%, 38% with a BPP of Rp. 2,299.54/kWh, Rp. 2,206.15/kWh, Rp. 2,653.37/kWh. Economically, the optimum recommended PLTS penetration rate is around 35-45%. The results of the investigation of load flow and quasi-dynamic power systems also show that this penetration is possible.