## Explain how to represent power lines, Electrical Engineering

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Explain How to Represent Power Lines?

The equivalent circuit of a power line depends on the length of the line and on the accuracy of the model required. In general, any power line may be represented as a two-port network, as shown in Figure, for which:

VS = AVR + B IR

IS = C VR + D IR

The line parameters used to determine the 2-port network constants (A, B, C and D) may be represented by lumped-constant circuits. For long transmission lines, a distributed-constant circuit model is used when accuracy is of importance.

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