一起发电机内部转换性故障的分析及启示Analysis on a Internal Translating Fault of Generators and the Enlightenment
李军保,陈俊
LI Jun-bao1,CHEN Jun2(1.Zhejiang Provincial Energy Group Co.
摘要(Abstract)：
以一起发电机内部转换性故障为例,分析保护装置记录的相关电气量波形及故障报告,确认故障过程为定子匝间短路故障转相间短路故障,由发电机差动保护和发变组差动保护动作于跳闸。该机组未配置匝间专用TV和定子匝间保护,无法快速切除定子匝间故障,最终发展成相间短路故障,建议各种类型的大型机组均应配置定子匝间保护。
By taking an internal translating fault of the generator for instance,the paper analyzes waveform of power system and fault report recorded by protective devices.It is determined that the inter-phase short circuit fault comes from inter-turn fault of the stator and the differential protection of the generator and generator transformer unit's action on trip-out.The unit is not configured with special inter-turn TV and stator inter-turn protection and is unable to fast cut off the inter-turn fault of stator,which ultimately develops into inter-phase short circuit.It is suggested that large units of all sorts should be configured with inter-turn fault protection.
关键词(KeyWords)：
发电机;定子;匝间保护;分析
generator;stator;inter-turn protection;analysis
基金项目(Foundation):
作者(Author):
李军保,陈俊
LI Jun-bao1,CHEN Jun2(1.Zhejiang Provincial Energy Group Co.
DOI: 10.19585/j.zjdl.2013.05.017