Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 15, Issue 2, Pages 646-651Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/61.852999
Keywords
ELF magnetic field; mitigation; passive loop; current dipole moment
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Magnetic field mitigation for overhead power lines using a passive loop conductor 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 ROW (right of way) but everywhere around the conductors. For this purpose, the concept of current dipole moment was introduced and applied to the problem. First to determine the validity of the derived formula which estimates the induced current to the passive loop, a miniature transmission line model experiment was performed. Then, the mitigation effectiveness of the actual dimensions of several kinds of overhead transmission line arrangements were estimated by the calculation. The application of a current dipole moment was sufficient for explaining the differences in the mitigation effectiveness depending on the conductor arrangement and for clarifying the requirements for effective mitigation.
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