Mitigation of magnetic fields produced by overhead sagging conductors of complex geometry using sagging passive loop conductor

摘要

The magnetic flux densities above the earth surface produced by overhead sagging conductors of complex geometry are estimated. The power line is divided into a series of straight-line segments (spans). The analytical formulas for calculating the 3D magnetic field with respect to a convenient and unique reference system are derived. Moreover the mitigation effects due to the passive loop are also investigated, whereas the mitigation loop can be treated as a two-sagging-conductor closed loop located under the power line.