May 2008
Intermediate to advanced
340 pages
9h 41m
English
Content preview from Electrical Power System Essentials
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E.4 THE SHORT TRANSMISSION LINE
When the line length falls below a value of 80 km, the equivalent circuit of the medium-length transmission line model may be simplified by omitting the shunt capacitances. In this way, only the total series impedance of the transmission line is taken into account.
The equivalent circuit of the medium-length transmission line is depicted in Figure E.5. The matrix expression for the voltage and the current at the sending end is:
In the following section, it will be made plausible that the shunt capacitances can be omitted for the shorter line lengths.
Figure E.5 Equivalent circuit of a short transmission line.
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