Vibration analysis of doubly-fed induction generator for wind power

WEN Bin，TONG Shi-wei，CHENG Lin-zhi，SHI Hang

（XJ Windpower Technology Company，Xuchang 461000，China）

Abstract：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.