The installed capacity of wind turbines in China increased rapidly in the past 10 years. Against the backdrop
of growing wind turbine capacity, the failure of wind turbines is becoming increasingly serious. Based
on the three primary configurations and failure statistics analysis of wind turbines in China, this paper
summarizes the failures of wind turbine components, such as frequency converters, generators, gearboxes,
pitch systems, yaw systems, blades, braking systems and sub-synchronous machines. Although there are
many failure types and various causes, we can deduce four primary reasons for these failures: lack of core
technologies; inferior quality due to price competition; design standards and wind farm climate differences;
and no mandatory quality certification and exterior factors, such as wind farm construction, power
grids and maintenance. Finally, while aiming to improve the reliability, a reliability management method
with regard to the design, manufacturing and maintenance of wind turbines was proposed.
The installed capacity of wind turbines in China increased rapidly in the past 10 years. Against the backdropof growing wind turbine capacity, the failure of wind turbines is becoming increasingly serious. Basedon the three primary configurations and failure statistics analysis of wind turbines in China, this papersummarizes the failures of wind turbine components, such as frequency converters, generators, gearboxes,pitch systems, yaw systems, blades, braking systems and sub-synchronous machines. Although there aremany failure types and various causes, we can deduce four primary reasons for these failures: lack of coretechnologies; inferior quality due to price competition; design standards and wind farm climate differences;and no mandatory quality certification and exterior factors, such as wind farm construction, powergrids and maintenance. Finally, while aiming to improve the reliability, a reliability management methodwith regard to the design, manufacturing and maintenance of wind turbines was proposed.
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