The segment input file is automatically constructed when the project is compiled, or when the line constants are solved manually (see Solving the Transmission Segment Constants Manually above). This file is used as input to the LCP; it is automatically generated and cannot be modified.
The input file is pieced together using information taken from:
Configuration Component: Depending on whether you are modeling a transmission line or a cable segment, the first part of this file is composed of input parameters taken directly from the corresponding instance of the Transmission Line or Cable Configuration component, as shown below for a transmission line:
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Line Summary: { Line Name = FLAT230 Line Length = 100.0 Steady State Frequency = 60.0 Number of Conductors = 3 } |
Tower or Cross Section Component: Important parameters such as conductor data and ground data, dimensions, etc. are extracted from the Model-Data segments of whatever tower or cable cross-section components exist in the editor. These are placed in the input file as well and represent the bulk of the file:
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Line Constants Tower: { Name = H-Frame-3H4 Circuit = 1 { Transposed = 0 Conductors = 3 Conductor Phase Information = 1 2 3 Radius = 0.0203454 DCResistance = 0.03206 ShuntConductance = 1.0e-011 P1 = -10.0 30.0 P2 = 0.0 30.0 P3 = 10.0 30.0 Sag = 10.0 Sub-ConductorsPerBundle = 2 { BundleSpacing = 0.4572 } } GroundWires = 2 { Eliminate Ground Wires = 1 Radius = 0.0055245 DCResistance = 2.8645 P1 = -5.0 35.0 P2 = 5.0 35.0 Sag = 10.0 } } Line Constants Ground Data: { GroundResistivity = 100.0 GroundPermeability = 1.0 EarthImpedanceFormula = 0 } |
Model Component: Some important information will appear in the input file from whatever model is being used. In this case, the it is the Frequency Dependent (Phase) model:
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Frequency Dep. (Phase) Model Options: { Interpolate Travel Times = 1 Infinite Line Length = 0 Curve Fitting Start Frequency = 0.5 Curve Fitting End Frequency = 1000000.0 Maximum # of Poles for Surge Admittance Fit = 20 Maximum # of Poles for Attenuation Constant Fit = 20 Maximum Fitting Error (%) for Surge Admittance = 0.2 Maximum Fitting Error (%) for Attenuation Constant = 2.0 Weighting Factor 1 = 100.0 Weighting Factor 2 = 1000.0 Weighting Factor 3 = 1.0 Write Detailed Output Files = 0 } |