FMECA ANALYSIS OF WIND TURBINE USING SEVERITY AND OCCURRENCE AT HIGH UNCERTAIN WIND IN INDIA T.SUNDER SELWYN R.KESAVAN M. Ramachandran Principal, Prince Dr. K. Vasudevan College of Engineering and Technology, Chennai- 600 127 Professor, Department of Production Engineering, MIT, Anna University, Chennai - 600 044, India. Assistant Professor. Department of Mechanical Engineering MPSTME, SVKM’S NMIMS. Shirpur- 425405, Maharashtra, India. sweetestchandran@gmail.com Abstract: This paper presents the results for the Failure Modes Effects and criticality Analysis (FMECA) performed for the Wind turbines (WT) located in a high uncertain wind environment. The WTs have several failure modes which are correlated to each other because of the common failure mechanisms behind them. The FMECA was carried out for Wind Turbine System (WTS) and its sub assemblies to check the design reliability of twenty numbers of 250 kW WTs, located in Muppandal, India, over the span of 15 years. The WTs situated in high windy region have different kinds of modes of failure than the low wind region. The reliability software tool used to analyze this study is Reliasoft’s Xfmea Version 5.1.1. The results show that considerable improvements in the reliability of WTs are obtained by modifying and redesigning some WT components, by implementing redundancy system for the yaw system and sensors, effective monitoring mechanism for brake system and gear system and proper preventive maintenance of all WT components. Keywords: FMECA; Wind turbine; Severity; Occurrence; Detection; Risk Priority Number; Criticality. 1. INTRODUCTION Price .et. al describes a new tool for automating electrical design failure mode and effects analysis (FMEA) and it can be improved to make incremental design FMEA much less of a difficulty for the engineer[1]. Wang presents the framework of the procedure is implemented from conventional failure mode and effects analysis. They proposed the adoption of quality cost factors that are used to replace the ambiguous factors used in the traditional FMEA calculation. Chen evaluated the structure of hierarchy and interdependence of corrective action by interpretive structural model and calculated the weight of a corrective action through the analytic network process. Chin et al proposed a framework of a fuzzy FMEA (failure modes and effects analysis) based evaluation approach for new product concepts, which can assist inexperienced users to perform FMEA analysis for quality and reliability improvement, alternative design evaluation, materials selection, and cost assessment. Selwyn presents the results for the Failure Modes and Effects Analysis (FMEA) performed for the Wind turbines (WT) located in a high uncertain wind environment, by implementing redundancy system for the yaw system and sensors, effective monitoring mechanism for brake system and gear system and proper preventive maintenance of all WT components. International Journal of Applied Engineering Research ISSN 0973-4562 Volume 10, Number 11 (2015) © Research India Publications ::: http://www.ripublication.com 10250