OPERATIONAL CHALLENGES AND PERFORMANCE DEGRADATION PATTERNS IN MODERN WIND ENERGY SYSTEMS: A COMPREHENSIVE ANALYSIS OF GRID INTEGRATION AND MAINTENANCE ISSUES

OPERATIONAL CHALLENGES AND PERFORMANCE DEGRADATION PATTERNS IN MODERN WIND ENERGY SYSTEMS: A COMPREHENSIVE ANALYSIS OF GRID INTEGRATION AND MAINTENANCE ISSUES Sa'dullayev Tuymurod Mardullo oglu, Taniyev Mirzohid Khurramovish Associate Professor, Department of Electrical Machines and Drives Engineering, Tashkent State Technical University https://doi.org/10.5281/zenodo.15732619 Abstract: this paper presents a comprehensive analysis of operational issues in modern wind energy systems, based on a 36-month study of 450 turbines. The results show that blade-related failures (32.4%) and gearbox malfunctions (24.7%) are the most frequent causes of downtime, costing an average of $47,000 per turbine annually. Predictive maintenance strategies reduced unplanned downtime by 34% and improved availability to 94.2%. Grid integration challenges such as voltage fluctuations and reactive power issues were also assessed. These findings provide practical insights for enhancing WES reliability and performance. Keywords: wind energy systems, turbine maintenance, grid integration, operational efficiency, renewable energy.