基于DSP的风力发电机组行星齿轮故障诊断方法研究

发布时间：2018-03-08 00:31

本文选题：风力发电机组　切入点：行星齿轮　出处：《哈尔滨理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着风电设备常年持续运行,风电设备的故障诊断技术应用日益受到重视。但风电机组的特殊性使得传统的振动检测方法存在一定的局限性。利用发电机电信号对风电机组进行检测成为当前研究的热点之一,因此研究一种便携式电信号采集与诊断装置具有一定的实际应用意义。本文采用瞬时解调功率法对风力发电机组行星齿轮故障进行诊断,利用传动链中齿轮的故障信息会同时反映在定子电流和电压中的特点,对定子电流、电压及转速信号进行同步采样,用Hilbert变换获取电流和电压信号的同相包络信息,对包络信息进行归一化处理,然后将两者相乘,最后对相乘之后的信号进行FFT变换,得到瞬时解调功率谱。研究以F28335DSP为核心,利用AD7656同步采集三路信息,通过嵌入DSP内部的瞬时解调功率算法实现信号分析,并用TFT液晶屏显示分析结果,实现便携、实时故障诊断的目的。通过建立相关的风电系统仿真模型和实验台,进行行星齿轮故障仿真及模拟实验,并将实验结果与采用振动法检测的结果对比,证明了研究的内容在实际应用中的可行性。行星齿轮故障仿真与实验结果表明,设计的以DSP为核心的故障诊断系统,具有且体积小、便于携带的特点,除能够实现对风电机组传动链中行星齿轮故障检测与诊断外,还可用于轴、滚动轴承等部件的检测与诊断。可应用于现场的风电机组的传动链故障诊断中。
[Abstract]:As wind power equipment continues to operate all year round, More and more attention has been paid to the application of fault diagnosis technology for wind power equipment. However, the particularity of wind turbine makes the traditional vibration detection method have some limitations. It has become current to use generator signal to detect wind turbine. One of the hotspots of research, Therefore, it is of practical significance to study a portable electric signal acquisition and diagnosis device. In this paper, the instantaneous demodulation power method is used to diagnose the planetary gear fault of wind turbine. The fault information of gears in the transmission chain is reflected in the stator current and voltage simultaneously. The stator current, voltage and rotational speed signals are sampled synchronously, and the in-phase envelope information of the current and voltage signals is obtained by Hilbert transform. The envelope information is normalized, then multiplied by the two, and the signal after multiplying is transformed by FFT to obtain the instantaneous demodulation power spectrum. Using F28335 DSP as the core, three channels of information are collected synchronously by using AD7656. Signal analysis is realized by the instantaneous demodulation power algorithm embedded in DSP, and the analysis result is displayed by TFT LCD screen. The purpose of portable and real-time fault diagnosis is realized. The simulation model of wind power system and the experimental platform are established. The fault simulation and simulation experiment of planetary gear are carried out, and the results of experiment and vibration detection are compared, which proves the feasibility of the research in practical application. The simulation and experimental results of planetary gear fault show that, The fault diagnosis system based on DSP has the characteristics of small size and easy to carry. It can not only detect and diagnose the fault of planetary gear in the transmission chain of wind turbine, but also be used for shaft. Detection and diagnosis of rolling bearing and other components. It can be used in fault diagnosis of transmission chain of wind turbine.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM315;TH132.41

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