Online Monitoring And Fault Diagnosis Used In Wind Turbine

Because of the global energy shortage,as a renewable,clean energy, the development and utilization of wind energy resources attract much more government. Chinese government paid more attention to develop wind power technology in recent years; But because of the last two years the domestic wind power installed capacity has grown rapidly, leading to a series of other measures for supporting wind power temporarily lagging behind, there are some constraints of domestic wind power industry development. Among them, lack of domestic wind turbine monitoring tool on line and fault diagnosis is an important aspect of technical services.The main content of this article:1. Large-scale wind turbine on the structure analysis of the situation, a clear failure of Unit and the location and the vibration mechanism, and analyzed for fault-prone area of the fault characteristics of the spindle system;2.Using two ways of Time Domain and four ways of frequency domain methods to analyzes the combination of the characteristics of vibration fault. Depending on the waveform reflect the impact signal. For the modulation of the signal during the fault, the paper takes demodulation spectrum and cepstrum to solve the modulation of vibration signal.avoiding the shortage of the conventional demodulation method which leads the misunderstanding;3.The Hilbert-Huang Fault plays great role in fault diagnose of the wind turbine., with the concept of instantaneous frequency; But the instantaneous frequency would be distured by the IMF which include the low-frequency signal.The paper proposes the way tha ruducing the unnecessary signal.4.Designed a comprehensive large-scale wind turbine condition monitoring system, including on-site measuring point selection, installation note points, the pretreatment of the original signal, the overall monitoring program to establish and so on.