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Medium Transmission Lines

Medium transmission lines have lengths between 50-160 km and voltages from 21-100 kV. For these lines, capacitance current is significant and cannot be neglected. While the capacitance is distributed along the entire length, calculations are simplified by assuming the capacitance is lumped together and represented by capacitors connected across the line at various points. Two common methods for modeling medium transmission lines are the nominal T and nominal π methods.

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JPR EEE
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1K views8 pages

Medium Transmission Lines

Medium transmission lines have lengths between 50-160 km and voltages from 21-100 kV. For these lines, capacitance current is significant and cannot be neglected. While the capacitance is distributed along the entire length, calculations are simplified by assuming the capacitance is lumped together and represented by capacitors connected across the line at various points. Two common methods for modeling medium transmission lines are the nominal T and nominal π methods.

Uploaded by

JPR EEE
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPT, PDF, TXT or read online on Scribd
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Medium Transmission Lines

1. Medium transmission lines have length between 50 km and160 km and line voltage between 21 KV and 100 KV. 2. In such lines the capacitance current of the system is appreciable and as such cannot be neglected. 3. The capacitance is distributed over the whole length of the line but in order to make the calculations simple, the line capacitance is assumed to be lumped or concentrated in the form of capacitors shunted across the line at one or more points.

Localized capacitance method


1. Nominal T method 2. Nominal method

Nominal T method

Nominal method

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