Shielding calculation for sizing overhead transmission line structures
DOI:
https://doi.org/10.46842/ipn.cien.v29n2a03Keywords:
Transmission lines, high voltage, back flashoverAbstract
This research document describes a methodology for determining the shielding angle of overhead transmission lines using the electrogeometric model. The response of the overhead transmission line depends on the discharge point (conductor, guard wires or on the tower); when using the electrogeometric model, the location of the guard wires is optimized to drain the discharge to ground and avoid faults in the transmission line. A practical case of a double-circuit overhead transmission line with two guard wires, which operates at a voltage level of 230 kV, is presented. The results are consistent with those used in the 2B2-BD transmission structure standardized by the Federal Electricity Commission.
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