电压互感器铁磁谐振引起的基波定子接地保护动作分析  

The Action Analysis of Stator Ground Protection Caused by TV Unreal Grounding

作　　者：陈海龙 李建强 张玉宝 王双歌 张红跃 CHEN Hailong LI Jianqiang ZHANG Yubao WANG Shuangge ZHANG Hongyue(XJ Electric Co., Ltd., Xuchang 461000, China Datang Sanmenxia Electric Power Co., Ltd., Sanmenxia 472143, China)

机构地区：[1]许继电气股份有限公司,河南省许昌市461000 [2]大唐三门峡电力有限责任公司,河南省三门峡市472143

出　　处：《水电与抽水蓄能》2017年第1期111-114,119,共5页Hydropower and Pumped Storage

摘　　要：结合发电厂实际运行中出现的一例由于机端电磁式电压互感器铁磁谐振引起的"虚幻接地"现象造成基波定子接地保护动作,从保护原理、保护动作报告、录波信息详细分析了定子接地保护动作行为,并对TV铁磁谐振原理、特点进行详细分析,当系统参数符合基波谐振的条件,在外部原因的激发下引起基波谐振产生"虚幻接地"现象。最后提出机端TV铁磁谐振的消谐措施及注意事项,以保证发电机组安全可靠运行。Combined with the actual operation of power plant in one case due to the terminal electromagnetic voltage transformer ferroresonance ＂unreal grounding＂ phenomenon caused by the action of stator grounding protection, from the protection principle, protection action report, records the detailed analysis of the stator ground protection action, and detailed analysis on TV ferromagnetic resonance principle, characteristic, when the system parameters meet the fundamental resonant conditions, cause the fundamental resonance produced ＂unreal grounding＂ phenomenon in the stimulation of the external cause. Finally put forward the measures of eliminating harmonics terminal TV ferroresonance and the matters needing attention, to ensure safe and reliable operation of generating unit.

关 键 词：TV铁磁谐振 虚幻接地 基波定子接地保护 消谐措施 

分 类 号：TV736[水利工程—水利水电工程]