重庆大学学报：自然科学版2012，Vol.35Issue(9)：80-85,6.
接地网故障诊断的磁场逆问题求解方法
Computation method of magnetic field inverse problem on grounding grids fault diagnosis
摘要
Abstract
Grounding grids are the guarantee of substation running safety. The fault of grounding grids is a threat to people and equipment in substations. A method to diagnose the fault of grounding grids based on magnetic field inverse problem. The inverse problem of magnetic field is established by injecting and extracting a low frequency current. The morbid of inverse problem is solved through regularization and Newton iteration method to obtain the distribution of the mesh currents. The approximate distribution of the magnetic field is calculated to diagnose the fault of the grounding grid. A 4 × 4 substation grounding grids is taken as an example. By comparison of the forward problem result, the error is under 3%, so the prposed method of inverse problem is verified. The selection of measurement point is discussed, and 40 % of the number of meshes is accounted to approximate the real distribution of the magnetic field on the grounding grids.关键词
接地网/故障诊断/磁场逆问题/正则化Key words
grounding grids/diagnosis/inverse problem of magnetic field/regularization分类
信息技术与安全科学引用本文复制引用
何为,史庆岩,杨帆,张瑞强..接地网故障诊断的磁场逆问题求解方法[J].重庆大学学报：自然科学版,2012,35(9):80-85,6.基金项目
基金项目：国家自然科学基金青年基金资助项目 （）
