摘要
在中性点不直接接地的复杂电网中,因系统突发单相接地故障而激发的铁磁谐振现象经常出现,文章利用MATLAB内建的仿真工具箱对由于电压互感器非线性励磁电感和系统对地电容匹配而引起的铁磁谐振暂态过程进行了数值仿真,利用小波分析对铁磁谐振进行了研究,仿真结果表明,小波分析对铁磁谐振频率的检测是有效的。
In the neutral point non-earthing sophisticated power system, ferrores-sonance overvoltage caused by single-phase short circuit happens frequently. Thi s paper employed the toolbox of simulation implement of MATLAB to achieve nume rical calculation and simulation of the ferroresonance transient process due to matching of nonlinear magnetizing inductance of PT and network-to-earth capacita nce. Basing on research on ferroresonance using wavelet analysis, the simulation results show that wavelet analysis is efficient to the detection of ferroresona nce frequency.
出处
《华中电力》
2004年第6期10-13,24,共5页
Central China Electric Power
