风力发电机转子几字形导电排熔断故障原因分析及改造

Analysis and Reformation of Fusing Fault of Wind Turbine Generator’s Zigzag-Shaped Conducting Bar

在对某2 MW风电机组故障处理过程中发现发电机转子几字形导电排熔断,针对该故障,从导电排的结构设计、制造工艺、材质性能等方面进行系统性检查分析,确定导电排在制作过程中,产生工艺性损伤后其机械性能大大降低,长期运行后,在离心力和热应力的作用下,损伤处疲劳,最终导致导电排熔断。对此从工艺、结构等方面改进,对导电排进行修复,有效解决了该发电机转子几字形导电排熔断的问题。

During the troubleshooting of a 2 MW wind turbine generator, it is found that the zigzag conducting bar of generator rotor is fused. According to the fault, the structural design, manufacturing process and material properties of the conducting bar are systematically examined and analyzed. It is determined that the mechanical properties of the conducting bar are greatly reduced after the technical damage occurred during the manufacturing process. After long-term operation,under the action of centrifugal force and thermal stress, the damaged part is fatigued, and finally the conducting bar is fused. Therefore, the design process, design structure and other aspects are improved, and the conducting bar is repaired,which solves the fusing fault of the generator’s zigzag conducting bar, and ensures the unit’s safe and stable operation.