風力發電機 故障 趨勢 分析

Abstract

Owing to growing demand of higher availability of wind turbines, both wind turbine manufacturers and owners are improving maintenance and repair techniques as well as operating skills of wind turbines. In order to clarify the trend on maintenance and repair at wind farms, the investigation was performed for four wind farms, Hankyung, Sungsan, Taeback and Changjuk. The data for the analysis was collected for four years spanning from 2011 to 1014. In Sungsan wind farm where Vestas 2 MW wind turbines are installed, the number of repair occurred at No. 5 and No. 6 wind turbines the most, while the down time due to repair was the longest at No. 5, followed by No. 3 and No. 6. The electric parts of turbines placed at the top of repair list, followed by transformers, hydraulic system, cooling system and yawing system. In Taeback wind farm with Hyundai and Hyosung wind turbines, the most number of repairs for two years had been reported at No. 8 wind turbine, followed by No. 1 and No. 5 wind turbines. The electric parts failure caused the most shutdown of the wind turbines, followed by hydraulic system and yawing system. In Chanjuk wind farm with Hyundai wind turbines, the No. 2 wind turbine experienced most frequent repairs for two years, followed by No. 6 and No. 7 wind turbines. Yawing system and electrical parts of wind turbines were the main causes of turbine failure. Based on repair costs from Sungsan and Hankyung wind farms, the repair costs did not much occurred at two years from the beginning of operation. Then the repair costs became considerably high at three to eight years from the beginning of operation. The maximum repair costs occurred at eight to nine years from the beginning of operation, which may remain until one to two years before decommissioning. The trend in wind turbine failure emerged mainly with wind turbine manufacturers, while there was not effect of wind turbine layout on the failure. Neg-Micon wind turbine had the most failure at hydraulic system, and transformer failure occurred at Vestas V80 wind turbine the most. The malfunction of electric parts and generator failure were the most at Vestas V90.