Evaluation of power plant reliability using index loss of load in the Suralaya power plant

Suralaya Power Plant (SPP) is the largest capable electricity generation company in Indonesia, with a total installed capacity of 3400 MW. As the largest power plant in Indonesia, SPP holds a great responsibility as a supplier 17% of the electricity needs of the Java, Madura and Bali (JAMALI) systems. This makes the SPP also one of the national vital objects (Obvitnas). This paper will calculate the reliability index of the generator using the method of loss of load probability (LOLP) and loss of load expectation (LOLE) based on the value of the force outage rate (FOR). Based on data on failure and daily expenses in 2019, the reliability index of SPP for units 1-4 is 4,23 days per year or 1,23%. The higher values LOLP/LOLE are in 2019 are possibility of SPP has lost its burden for 2 days in a period of 2019 because of force majeure (blackout) which causes a reduced load. To improve power plant is that the electricity load in West Java can be fulfilled with the electricity flow.