Vibration Analysis of a Constant Speed and Constant Pitch Wind Turbine
In order to increase the reliability of the rotating machineries like rotor, gear box, high speed shaft, low speed shaft, generator, and yaw of wind turbine (WT), it is important to monitor the vibration level. The key aim of the paper is to study the vib
- PDF / 2,080,305 Bytes
- 15 Pages / 439.37 x 666.142 pts Page_size
- 70 Downloads / 187 Views
Abstract In order to increase the reliability of the rotating machineries like rotor, gear box, high speed shaft, low speed shaft, generator, and yaw of wind turbine (WT), it is important to monitor the vibration level. The key aim of the paper is to study the vibration characteristics experienced in the 400 kW WT at different load and operating conditions. The experimental vibration analysis of WT components is done and vibration characteristic curves are generated with the help of data acquisition software. These vibration characteristic curves are studied and observations made from them for their severity and effects are analyzed. Some indispensable recommendations have been given for vibration control.
1 Introduction While fossil fuels are the main fuels for thermal power, there is fear that they will get exhausted eventually in this century. Therefore, we are in need to harvest any other renewable resources. In the continuous search of clean, safe, and renewable energy sources, wind power has emerged as one of the most attractive solutions. Wind turbine (WT) offers a cost-effective alternate renewal energy source. Modern WTs are of slender and elastic construction, above all the rotor blades and the tower. They are, therefore, structures which are extremely prone to vibration. In addition, there is no lack of excitations as the discussion of cyclically alternating rotor forces has shown. These forces can excite certain subsystems or even the entire turbine to vibrate dangerously. The vibration of WT components such as gearbox, generator, nacelle, high speed shaft, low speed shaft, tower, and nacelle
T. Sunder Selwyn (*) · R. Kesavan Deptartment of Production Technology, Madras Institute of Technology, Chennai, India e-mail: [email protected] R. Kesavan e-mail: [email protected]
S. Sathiyamoorthy et al. (eds.), Emerging Trends in Science, Engineering and Technology, Lecture Notes in Mechanical Engineering, DOI: 10.1007/978-81-322-1007-8_40, © Springer India 2012
429
430
T. Sunder Selwyn and R. Kesavan
affect the dynamic stability of the complete system by causing excessive stress and fatigue. The main objectives of this paper are to analyze the vibration characteristic experienced in the gear box, bearing, yaw drive, low speed shaft, high speed shaft, and generator of a WT at different load and operating conditions. The rotor system, generator system, and gear box system which are connected in series, have less Failure Criticality Index but they do cause large downtime and replacement costs [1]. It is generally suggested that the manufacturer should provide a good logistical support and maintain spares of blade, gear, and generator at nearby sites. It is clearly understood that if the yaw system fails, then the electricity generation will be reduced as the yaw system is connected parallel to the entire system.
2 Literature Review Li [2] stated that there are many types of techniques available for condition monitoring such as vibration analysis, oil analysis, thermography, strain measuremen
Data Loading...
