6Distribution System Line Models
The modeling of distribution overhead and underground line segments is a critical step in the analysis of a distribution feeder. It is important in the line modeling to include the actual phasing of the line and the correct spacing between conductors. Chapters 4 and 5 developed the method for the computation of the phase impedance and phase admittance matrices with no simplifying assumptions. Those matrices will be used in the models for overhead and underground line segments.
6.1 Exact Line Segment Model
The model of a three-phase, two-phase, or single-phase overhead or underground line is shown in Figure 6.1.
FIGURE 6.1Three-phase line segment model.
When a line segment is two-phase (V-phase) or single-phase, ...
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