电压互感器零序电压回路典型故障的分析与研究  

Analysis and Research on Typical Faults of Zero Sequence Voltage Circuit of Voltage Transformers

作　　者：雷红梅[1] 宋光文 廖腾飞 LEI Hongmei;SONG Guangwen;LIAO Tengfei(Guangxi Vocational and Technical College of Water Resources and Electric Power,Guangxi Nanning 530023,China;Guangxi Hengdu Power Transmission&Distribution Engineering Co.,Ltd.,Guangxi Nanning 530031,China)

机构地区：[1]广西水利电力职业技术学院,广西南宁530023 [2]广西恒都输变电工程有限公司,广西南宁530031

出　　处：《广西电力》2022年第1期81-86,共6页Guangxi Electric Power

基　　金：广西高等学校高水平创新团队及卓越学者计划项目(桂教人才[2020]6号)。

摘　　要：电力系统运行中电压互感器的零序电压回路易造成继电保护拒动或误动,甚至引发严重电力事故,监视和安全保障措施仍需完善。针对这一问题,文章通过分析研究零序电压回路的接地故障、铁磁谐振影响、电压互感器极性接线错误和断线的现象,并经现场多次实践,结合工程实际采用提高元器件额定电压、加装专用的消谐器、增加零序电压回路的阻尼、采用零序电压滤过器等改进方法和措施,有效消除事故隐患,以期电力系统更安全更可靠运行。In the operation of power system, the zero sequence voltage circuit of voltage transformers can easily cause the refusal or malfunction of relay protection, and sometimes serious accidents. Surveillance and security safeguards still need to be refined.In response to the problem, this paper analyzes and studies the ground fault of the zero sequence voltage circuit, the influence of ferromagnetic resonance, the wrong polarity wiring and disconnection of voltage transformers. After many field practices, improved methods and measures, such as increasing the rated voltage of components, installing special harmonic eliminators, increasing the damping of the zero sequence voltage loop, and adopting zero sequence voltage filters, are adopted to effectively eliminate hidden dangers of accidents, so that power system will operate more securely and reliably.

关 键 词：开口三角形绕组 零序电压回路 接地故障 铁磁谐振 

分 类 号：TM451[电气工程—电器]