Question
Download Solution PDFIn the case of nominal – T representation of medium length transmission lines, the shunt capacitance can be
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFTransmission Lines
| Types of transmission lines on the basis of length | |
| Small transmission lines | Up to 80 km |
| Medium transmission lines | 80 - 240 km |
| Long transmission lines | > 240 km |
Nominal T Model Of A Transmission Line
In a nominal T model of a medium transmission line, the series impedance is divided into two equal parts, while the shunt admittance is concentrated at the middle of the line. The nominal T model of a medium transmission line is shown in the figure.
Sending end voltage and current can be obtained by application of KVL and KCL, to the circuit shown below
Current in the capacitor can be given as,
By Kirchhoff’s current law at node a,
By Kirchhoff’s voltage law
Equation of Sending end voltage Vs and current Is can be written in the matrix form as
Also,
Hence, the ABCD constant of the nominal T-circuit model of a medium line is
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