ANALYTICAL HIERARCHY PROCESS TO DETERMINE THE ELECTRICITY SUPPLY SOLUTION IN GIANT OIL BLOCK HANDOVER

• Main Author: Ugahari, Yudi
• Format: Theses
• Language: Indonesia
• Subjects: Manajemen umum
• Online Access: https://digilib.itb.ac.id/gdl/view/54920
• Institution: Institut Teknologi Bandung

PT. Electric Indonesia (PT EI), a state-owned company engaged in electricity, has agreed to sign a Memorandum of Understanding (MoU) with PT. Minyak Indonesia (PT MI) to be the provider of sufficient and reliable electricity and steam. By the end of the PT. Crude Oil Indonesia (PT COI) concession, the total load installed is ± 370MW consisting of production wells, gathering stations, steam stations, water treatment plants, industrial and residential areas. As the handover of PT COI to PT MI starts, the power purchase agreement (PPA) of the 3x100 Megawatt power generation unit that produces 76% of the existing electricity independent power producer (IPP) will cease. The new operator, PT MI, needs to ensure the electricity supply for its 300,000-barrel daily production target (est. 520MW). This research focuses on determining the best electricity supply option in giant oil blocks. In this case, the performance of PT MI in achieving the production target will heavily rely on the ability and reliability of the electricity supply that PT EI will provide for the next 20 years. With the expert's involvement to provide judgment values representing a consolidation of experience, intuition, and data, this research proposes the best combination solution for both transition and permanent period through multiple-criteria decision making (MCDM): Analytic Hierarchy Process (AHP) method. The power solution in the handover context decision-making can be viewed as multiple criteria with correlating criteria and alternatives. This task should take into consideration several conflicting aspects because of the increasing complexity of the technological, power quality improvement, and economic factors. In this study, based on the literature review, we adopt the most frequent evaluation criteria used in MCDM studies on energy issues. Two (2) criteria and six (6) sub-criteria are defined to select the best alternative power supply solution in the handover context. The financial and technical aspects as the main criteria. Afterward, We evaluated the CAPEX, OPEX, reliability, operability, power quality improvement and, constructability aspects as the sub-criteria. Results of the AHP calculation show the financial criteria (0.762) is the main contributor to the overall weight and sub-criteria with the highest global priority are CAPEX (0.48), OPEX (0.28), and Constructability (0.08). The generation of creative alternatives solution to ensure a sufficient electricity supply is essential. There are 2 (two) unprecedented technologies examined in this research, first is the use of a mobile trailer of aero-derivative gas turbine, and the second is the use of frequency converter. We observed several combinations namely (1) extending the PPA with the existing IPP and procuring new 4x100 Megawatt gas turbines, (2) extending the PPA with the existing IPP and procuring a new 400 MW-50/60Hz converter with additional package boilers, (3) acquisition of the existing IPP and procuring new 100 MW mobile aero-derivative gas turbine, and (4) acquisition of the existing IPP and procuring new 100 MW-50/60Hz converter. Based on the AHP conduct involving experts from system planning, operation planning, construction, and business planning to examine four electricity supply combination alternatives. Acquiring the existing IPP and procuring a new 100 MW-50/60Hz converter is the best option with yields of 31.5%.