Requirements for power line magnetic field mitigation using a passive loopconductor

Magnetic held mitigation for overhead power lines using a passive loop cond uctor was studied. The aim of this study is to clarify the requirements for effective mitigation not in a specific region such as at the edge of the R OW (right of way) but everywhere around the conductors. For this purpose, t he concept of current dipole moment was introduced and applied to the probl em. First to determine the validity of the derived formula which estimates the induced current to the passive loop, a miniature transmission line mode l experiment was performed. Then, the mitigation effectiveness of the actua l dimensions of several kinds of overhead transmission line arrangements we re estimated by the calculation. The application of a current dipole moment was sufficient for explaining the differences in the mitigation effectiven ess depending on the conductor arrangement and for clarifying the requireme nts for effective mitigation.