Reliability analysis of turbines used in the wind power plants
Subject Areas :Abdolreza Rastitalab 1 * , Ali Naddaf fard 2
1 - Department of Mechanical, Shiraz Branch, Islamic Azad University, Shiraz, Iran
2 - Department of mechanic engineering, Dariun Branch, Islamic Azad University, Dariun, Iran
Keywords: Reliability, wind turbine, wind power plant, wind speed, failure,
Abstract :
Given that fossil fuels cause environmental pollution, efforts have been made in different countries of the world to use renewable power plants instead of power plants that use fossil fuels to generate electricity. One of the important types of these power plants is wind power plants, which have been developed in different countries of the world. In these power plants, by installing wind turbines, the kinetic energy of the wind is used, the wind turbines rotate and electricity is generated. Therefore, wind turbines are one of the important components in wind power plants. On the other hand, reliability has become important in various systems. The reliability of a system means how well that system performs its work. The performance (availability and efficiency) and reliability of wind turbines can make the difference between the success and failure of wind farm projects, and these factors are vital for reducing energy costs. Given the importance of studying reliability in various systems, this paper studies the reliability of wind turbines used in wind power plants. There are numerous uncertainties in the design of such devices and their components. To ensure the safety of the turbines, these uncertainties must be taken into account. This research shows how this can be done in the design of wind turbine rotor blades in the context of bending failure caused by severe loading. First, the basic characteristics of such turbines in general and their blades are described. Then, a probabilistic model of wind speed fluctuations, which is the main source of loading uncertainty, is presented. After that, a blade reliability analysis is presented that considers the uncertainties associated with wind speed, blade resistance, and the model used to calculate the bending moments in the blades.
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