Reliability Analysis of Horizontal Axis Wind Turbine Using Qualitative and Quantitative Methods

A wind power plant is a facility that produces electricity by harnessing the power of the wind. The fundamental principle behind a wind turbine is the conversion of wind’s kinetic energy into rotational energy, which, in turn, drives a generator to generate electricity. The performance and reliability of wind turbine must be maintained so that production runs well. This study aims to determine the critical components, determine the failure rate, how to improve reliability, and get the $MTBF$ value on the 600 kW horizontal axis wind turbine components. Analysis is carried out by qualitative and quantitative methods. Based on the results obtained from Failure Mode and Effect Analysis (FMEA) qualitative analysis, there are three most critical components of wind turbines, generators with a value of 165.888, hub (main shaft) 156.1, and transmission (gearbox) 149.625, while the lowest components are blades and towers. The MTBF value of the most critical components is a generator of 1151.5 hours, a hub (main shaft) of 2464 hours, and a transmission (gearbox) of 9635.5 hours. Reliability in generator components, main shafts and gearboxes increases when maintenance is carried out at intervals R(t)80% and 90% and is better than reliability with maintenance at MTTF time intervals.