TV熔断器慢熔对三次谐波定子接地保护影响分析  

Analysis of Influence of TV Insurance Slow Melting on Third Harmonic Stator Grounding Protection

作　　者：杨维胜 侯小虎[1] 肖江滔[1] 任丽先 钟喜杰 袁岳 郭文[1] YANG Weisheng;HOU Xiaohu;XIAO Jiangtao;REN Lixian;Zhong Xijie;YUAN Yue;GUO Wen(China Yangtze power Co.Ltd.,Xiluod Hydropower power Plant,Zhaotong 657300,China)

机构地区：[1]中国长江电力股份有限公司溪洛渡水力发电厂,云南省昭通市657300

出　　处：《水电与抽水蓄能》2024年第5期38-42,共5页Hydropower and Pumped Storage

摘　　要：本文通过对大型水电机组三次谐波比率定子接地保护原理进行介绍,分析了电压互感器(TV)一次熔断器慢熔对三次谐波电压比率定子接地保护的影响,从TV励磁电流在慢熔期间存在间断角的角度,解释一次熔断器慢熔导致机端三次谐波电压增大的原因,加深运维人员对三次谐波原理定子接地保护的理解,提升运维人员专业技术水平,利于完善电力生产事故预防措施。This paper introduces the principle of the third harmonic ratio stator grounding protection of large hydropower units,and further analyzes the influence of TV primary fuse slow melting on the third harmonic voltage ratio stator grounding protection.Explain the reason why the slow melting of the TV primary insurance leads to the increase of the third harmonic voltage sampling at the machine end,and deepen the operation and maintenance personnel's understanding of the stator grounding protection of the third harmonic principle.Improving the professional and technical level of operation and maintenance personnel is conducive to improving the prevention measures for power production accidents.

关 键 词：继电保护 三次谐波 定子接地保护 TV熔断器慢熔 励磁电流 

分 类 号：TM77[电气工程—电力系统及自动化]