Electrical transmission or interconnection systems – Anti-induction or coupling to other systems – Magnetic or electrostatic field control
Patent
1991-03-29
1994-11-01
Pellinen, A. D.
Electrical transmission or interconnection systems
Anti-induction or coupling to other systems
Magnetic or electrostatic field control
174 32, 307147, 307326, 333 12, 361107, H04B 330
Patent
active
053609980
ABSTRACT:
A series-capacitance compensated shielding circuit is located physically adjacent and parallel to a polyphase power transmission line for the purpose of partially cancelling the electromagnetic fields created by current flow through the transmission line. The shielding circuit forms a loop circuit around substantially the entire transmission line or a portion thereof, and is positioned such that a current is induced therein by the magnetic field produced by the alternating currents in the transmission line. Such induced current is tuned by the series capacitance to produce an optimized cancelling magnetic field, thus reducing the net electromagnetic fields created by the power lines along a right-of-way.
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"Transmission Line Reference Book", Electric Power Research Institute EL-2500, 1982, Chapter 8, Field Effects of Overhead Transmission Lines and Stations, Deno and Zaffanella, pp. 329-419.
Elms Richard T.
General Electric Company
Pellinen A. D.
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