Abstract
With the rapid development of wind power industry, the wind turbine reliability has become a hotspot in wind power research. The failure modes and research progress of wind turbine reliability both at home and abroad were analyzed. The failure modes, failure causes and detection methods of some key components in the wind turbines were summarized. Also, the frequently used methods of reliability analysis and research status of wind turbine reliability were analyzed. Following this, research focuses, methods and measures to improve wind turbine reliability were presented. We also shed light on the condition monitoring and assessment process with condition monitoring system and supervisory control and data acquisition. It is of great significance to reduce the cost of operation and maintenance and to improve the safety of wind turbines.
Highlights
Fossil fuels are non-renewable and their associated prices are fluctuating sharply
With more and more wind turbines being installed, lots of potential problems still need to be solved, such as fatigue, failures, condition monitoring, operation and maintenance, which are especially true in the current circumstances where the tower height, rotor diameter and overall turbine weight have almost quadrupled in size and capacity [4]
Fatigue loads underestimated; exceeding design load; improper material; loss of Detection method Excessive vibration sensed by rotor bearing accelerometer in hub; High stresses recorded by operating instrumentation Low-speed sensor; bearing vibration sensor
Summary
The increasing environmental and climatic concerns of the current times have moved the research focus from conventional electricity resources to renewable resources. Renewable energy resources, such as wind, solar, and geothermal power, are clean alternatives to fossil fuels. Policy-driven accelerations play a very important role in market growth, especially in China, Germany, and the United States In these three countries, China is the world’s largest wind power market with 18 GW of newly installed wind power in 2017. With more and more wind turbines being installed, lots of potential problems still need to be solved, such as fatigue, failures, condition monitoring, operation and maintenance, which are especially true in the current circumstances where the tower height, rotor diameter and overall turbine weight have almost quadrupled in size and capacity [4]. Power control by yaw Variable speed Partial span pitch control Similar to WTS3 (Sweden) Variable speed
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