风电机组双馈发电机振动故障分析

Vibration analysis of doubly-fed induction generator for wind power

针对双馈发电机在风电机组运行过程中出现的振动故障问题,根据风力发电机组结构与运行特点,将频谱分析与ADAMS建模仿真技术应用到双馈发电机设计、制造与维护中。开展了大量的双馈发电机振动测试与频谱分析,建立了对中、平衡、弹性安装、轴承振动频谱与双馈发电机振动故障之间的关系,提出了优化对中维护、修改转子平衡工艺与优化弹性支撑-发电机固有频率的解决方法。在ADAMS软件平台上对弹性支撑-发电机固有频率优化进行了评价,并进行了转子平衡工艺优化前、后与弹性支撑-发电机固有频率优化前、后的振动值对比试验。研究结果表明,通过优化双馈发电机振动值已经由10 mm/s减小到2.2 mm/s,双馈发电机振动减小效果明显。

Aiming at the vibration problems of double-fed induction generator in the process of operating wind turbine generator, the spectral analysis and ADAMS simulation technology were applied in the design, manufacturing and maintain of the double-fed generator based on the characteristic of wind turbine generator structure and operation. After the lots of vibration tests and the spectral analyses of double-fed induction generator were carried out, the relation between the alignment, balance, resilient mounting, bearing vibration spectral and generator vibration fault was established. A method was presented to optimize the alignment maintenance, modify rotor balancing technology and optimize inherent frequency of resilient mounting and generator. The inherent frequency of resilient mounting and generator was evaluated in the ADAMS software platform, and the comparison of vibration before and after optimization the balance and inherent frequency were tested. The experimental results show that the optimized vibration is reduced largely from 10 mm/s to 2.2 mm/s, vibration of doubly fed generator decreased obviously.