IMPROVEMENT OF INFRARED THERMOGRAPHY INSPECTION FOR POWER TRANSMISSION AND DISTRIBUTION SYSTEM USING DMAIC (DEFINE-MEASURE-ANALYZE-IMPROVE-CONTROL) METHODOLOGY AT SUMATRA OPERATION - PT. ABC INDONESIA

• Main Author: Juniarto / 29115225, Nanang
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29525
• Institution: Institut Teknologi Bandung

PT. ABC Indonesia – Sumatra Operation operates a big oil onshore oil field located at mid region of Sumatra island, Riau Province, Indonesia. It is has been in operation since 1924, and has passed peak production in late of year 2000 and started to decline steadily in the recent years while approaching the end of Production Sharing Contract expiration in 2021. For more than five decades, Sumatra operation has produced up to 11 billion barrel oil. <br /> <br /> <br /> Sumatra Operation is laid in widespread area, consisting of approximately five major oil fields and more than 20 other small fields, which applies the advance technology of enhanced oil recovery including steam flooding and water flooding. All of its production facilities including supporting facilities such as offices, shops and housing facilities are electrically supplied by internal power system. Total of about 400 MW of load is powered from large scale power generation, transmission and distribution system consisting of : 20 power generations units, 52 substations and approximately 3,000 km of power lines at voltage level of 230 KV, 115 KV, 44 KV and 13.8 KV, which is managed by Power Generation and Transmission (PGT) team. <br /> <br /> <br /> In order to maintain reliability of electrical power delivered to the oil production facilities, the proactive inspection using infrared technology was performed since 2010 for all of substations and power lines. Infrared inspection recognizes the potential failure spots at those equipment that enable operation team to perform necessary repair before the equipment or powerline failed and impact to loss production opportunity (LPO). Previously, the inspection was performed to all power lines and substation with the similar interval. It was found that the potential failure found is very low compare to the total inspection performed, which in the end, the cost of inspection is not balance with the benefit gained from this activities. In late 2015, the oil prices was significantly decreased, which drove the need to reduce and optimize overall operating cost throughout Sumatra Operation. The inspection activities was stopped for a while and effort was initiated to optimize the infrared inspection activities, and develop inspection program with lower cost but with optimum benefit at acceptable risk. <br /> <br /> <br /> The improvement process was carried on using lean sigma DMAIC approach, focusing on clustering the facilities and implement the different interval of inspection for each cluster, supported with improvement of process workflow. The key performance indicator is also established and applied to ensure the program is running as expected. The improvement is expected can reduce the inspection resources usage at 50%, which impact to potential cost reduction up to 50% accordingly. <br />