Figure 4.34 shows double-circuit conductors' relative positions in segment 1 of transposition of a completely transposed three-phase

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Figure 4.34 shows double-circuit conductors' relative positions in segment 1 of transposition of a completely transposed three-phase overhead transmission line. The inductance is given by

\(\mathrm{L}=2 \times 10^{-7} \ln \frac{\mathrm{GMD}}{\mathrm{GMR}} \mathrm{H} / \mathrm{m} /\) phase Where GMD \(=\left(\mathrm{D}_{\mathrm{AB}_{\mathrm{eq}}} \mathrm{D}_{\mathrm{BC}_{\mathrm{eq}}} \mathrm{D}_{\mathrm{AC}_{\mathrm{eq}}}ight)^{1 / 3}\)

With mean distances defined by equivalent spacings

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Now consider a 345-kV, three-phase, double-circuit line with phase conductor’s GMR of 0.0588 ft and the horizontal conductor configuration shown in Figure 4.35.

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(a) Determine the inductance per meter per phase in Henries (H).

(b) Calculate the inductance of just one circuit and then divide by 2 to obtain the inductance of the double circuit.

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Power System Analysis And Design

ISBN: 9781305632134

6th Edition

Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

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