摘要
由铁磁性材料制成的磁环可以有效抑制GIS中VFTO的幅度和陡度,但材料的选型至为关键。基于对材料复磁谱特性的等效描述以及传输线理论的应用,在频域内建立了磁环对VFTO抑制特性的仿真分析模型,利用该仿真模型可以方便地获取各种材料磁环的高频抑制效果。对GIS隔离开关切合空载母线时产生的VFTO仿真表明,本文提出的分析方法是切实可行的,易于实现磁环材料的优化选型,可节省实验费用。
Ferromagnetic rings can be utilized to effectively suppress the amplitude and steepness of very fast transient over voltage （VFTO） generated within GIS, however, type selection of ferromagnetic materials is of extreme significance. Based on an equivalent description of the complex magnetic spectrum of ferromagnetic materials, as well as the application of transmission line theory, a simulation model is established in frequency domain to analyse the suppressing characteristics of ferromagnetic rings to VFTO, by which the high frequency suppressing effects of various ferromagnetic materials can be acquired conveniently. Simulation results to the VFTO within GIS produced by switching unloaded busbar demonstrates that the proposed analysing method is practicable and to realize of optimal type selection of materials, and saves experimental expenditure.
出处
《电工技术学报》
EI
CSCD
北大核心
2005年第11期30-34,共5页
Transactions of China Electrotechnical Society
