OPTIMIZING SPECIFIC FUEL CONSUMPTION ON HYBRID PV-DIESEL MICROGRID USING GENERALIZED REDUCED GRADIENT NONLINEAR METHOD: A CASE STUDY AT BUNAKEN

• Main Author: Rohman Kusuma, Noor
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/86962
• Institution: Institut Teknologi Bandung

Bunaken Island is located within the administrative region of Manado City. Located to the north of Manado, Bunaken Island covers an area of 8.08 km2. The electrical system on Bunaken Island relies on a Diesel Power Plant (DPP) with four machine generators, providing a daytime capacity of 300 kW and a nighttime capacity of 380 kW. In 2023, repairs and rehabilitation were carried out on the Solar Power Plant (SPP) due to fault since 2018. SPP is expected to reduce the reliance on DPP. This paper analyzes the existing operational pattern of the DPP to identify changes that can improve fuel efficiency. Subsequently, it investigates the hybrid operation of the SPP and DPP to achieve the most efficient use of fuel while considering engine performance factors, specifically Specific Fuel Consumption (SFC). The analysis in this paper utilizes the SOLVER plug-in available in Microsoft Excel. From the analysis of the comparison of existing PLTD operational patterns, the fuel usage efficiency is found to be 46.35 liters per day or equivalent to Rp 532,147 per day, with an improvement in SFC from 0.292 liters/kWh to 0.279 liters/kWh. Additionally the hybrid operation pattern of SPP and DPP, is found that the inclusion of energy from the SPP will reduce High Speed Diesel (HSD) consumption to 391.72 liters per day or equivalent to Rp 4,497,693 per day, with an improved SFC) of 0.259 liters/kWh. However, economically, adding additionally battery capacity is not feasible.