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In order for Gili Trawangan On-grid photovoltaic (PV) system to be reliable in supplying electricity, it is necessary to know the reliability of the main equipment in the PV system. The aim of this study is to determine the reliability of the main equipment of the on-grid PV system. The methodology is, collecting primary data in the form of disturbance data reports on Gili Trawangan PV system in 2011-2018, compiling the Reliability Block Diagram (RBD) of the PV system and determining the reliability and critical of the PV system equipment using Reliasoft Blocksim software version 11. The On-grid PV systems Reliability Block Diagram consists of 3 sub-systems; Source system, String Combiner System and Power Conditioning System, each of which is composed of main components. RBD simulation results with Reliasoft Blocksim software obtained the results that the reliability of the On-grid PV system is 49% at t=100 hours and 40% at t=300 hours, this condition is still far from the target of PV system reliability of 80%. From the simulation also obtained critical equipment on the On-grid PV system is an AC Inverter and Breaker component, which has a high Reliability Importance (RI) value and with the highest reliability value.

The reliability study of Gili Trawangan photovoltaic system using RBD (Reliability Block Diagram) method