Abstract
The increasing use of wind generation requests modifications in the electric power systems planning conception, because it includes one more uncertainty component, which needs to be studied properly and modeled. Understanding the failures rates and downtimes of wind turbines is difficult not only because of the considerable range of designs and sizes that are now in service worldwide but also since studies are conducted independently under various operating conditions in different countries. The fault tree method (FTA) has been used to study the reliability of many different power generation systems. This paper now applies that method to a wind turbine system to estimate the reliability of wind turbines. In the implementations, several types of wind turbines were considered in order to analyze the system’s reliability. The effectiveness of the proposed method is revealed through several case studies.
Highlights
Over the last few decades, the usage of renewable energies in electric power generation systems has been increased dramatically
This paper proposed a new method for estimating the reliability of the wind turbine components
Larger wind turbines tend broadly to suffer more failures than smaller ones this is confounded by type and differences between manufacturers
Summary
Over the last few decades, the usage of renewable energies in electric power generation systems has been increased dramatically. The reliability performance of wind turbine has been assessed in a number of references [1]-[5] Such studies considered the wind generation as a stochastic process based on the Markov method. Some efforts have been proposed analytical reliability evaluation of wind system generation availability [16]. The main wind turbine components, which can significantly affect the wind turbine reliability, are presented. Typical wind turbines and DFIG wind turbines are discussed below, which are the most common configuration can be used with different combinations of rotational speed, power control, drive train configuration and generator. The output regulation of a wind turbine can be achieved via pitch control by feathering the blades in order to control the power or by aerodynamic design of the rotor blades. The blades may be broken since there are no control devices for speed controlling
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