Abstract

Wind power, as a renewable energy for coping with global climate change challenge, has achieved rapid development in recent years. The breakdown of wind turbines (WTs) not only leads to high repair expenses but also may threaten the stability of the whole power grid. How to reduce the operation and the maintenance (O&M) cost of wind farms is an obstacle to its further promotion and application. To provide reliable condition monitoring and fault diagnosis (CMFD) for WTs, this paper presents a comprehensive survey of the existing CMFD methods in the following three aspects: energy flow, information flow, and integrated O&M system. Energy flow mainly analyzes the characteristics of each component from the angle of energy conversion of WTs. Information flow is the carrier of fault and control information of WT. At the end of this paper, an integrated WT O&M system based on electrical signals is proposed.

Highlights

  • Compared with the existing literature survey, the contribution of this paper is to focus on the intrinsic link between the various components of the energy flow and the various fault information ofsignals the information flow.signals, The manifestations of each faulty in each othercarriers kinds of into electrical the operation and the maintenance (O&M) methods based on component electrical signals canfault directly information carrier is discussed and summarized in detail

  • In view of the predicament of high O&M costs of wind turbines (WTs), this paper comprehensively investigates the existing condition monitoring and fault diagnosis (CMFD) techniques of WTs

  • Energy flow is a form of energy in WTs, which is divided into a subset for capturing wind energy, a subset for transferring mechanical energy, and a subset for generating electrical energy

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Summary

Background

The global desire for clean energy is driving the rapid development of wind power, and wind turbine (WT) manufacturing techniques have made tremendous progress in recent decades. The reports show that the installed capacity of wind power in the United States and P.R. China accounted for more than half of the total worldwide in 2017. The USA wind power market surged in 2017 with 9598 MW of new capacity added, bringing the cumulative total to. The rapid increase of installed capacity of WTs has brought hope for solving the problem of fossil energy shortage, especially the utilization of offshore wind energy. The condition monitoring and fault diagnosis (CMFD) technique of a wind farm is the core issue of timely discovery of incipient faults and arranging scheduled maintenance to reduce the O&M cost of the wind farm. TimelyEnergies discovery incipient faults and arranging scheduled maintenance to reduce the O&M cost of. Timely discovery of incipient faults and arranging scheduled maintenance to MW reduce the O&M cost of Country

Annual and cumulative wind power capacity
WT Figure
Mechanical Energy Subset
Gearbox
Electrical Energy Subset
WT Information Flow
Strain
Vibration
Torque
WT Algorithm Flow
FFT and Wavelet Transform
Theory Analysis
Experimental Setup
11. Typical electricalCMFD
Conclusions and Discussion

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