大型发电机组启动阶段励磁系统典型故障分析处理与对策

Analysis and Treatment of Typical Failures of ExcitationSystem in Large Generator Sets during Start-up

静态自并励系统受检测条件限制机组启动前难以全面检查,机组启动阶段励磁系统故障时有发生,延误机组并网。文章结合3起大型发电机组启动阶段发生的励磁系统典型故障案例,分别从励磁设备的特性、逻辑、技术原理进行分析与处理,并总结了方法和经验,提出了避免故障的应对策略。

The static self-excited excitation system is diffi cult to be fully inspected before the unit is started due to the detection conditions.The excitation system failure occurs during the unit startup phase,which delays the unit’s connection to the grid.This paper combines three typical failure cases of the excitation system that occurred during the start-up phase of large-scale generating units,analyzes and processes the characteristics,logic,and technical principles of the excitation equipment,summarizes the methods and experience,and proposes strategies to avoid failures.