Multiple Coupled Lossy Transmission Line
Modelica Standard Library
The Multiple OLine (or M OLine) component models coupled lossy transmission lines. It consists of several segments and several coupled single lines. Each segment consists of resistors and inductors that are connected in series in each single line, and of capacitors and conductors both between the lines and to the ground. The inductors are coupled to each other like in the M Transformer model. The following diagram shows the schematic of a segment with four single lines (lines=4):
To achieve a symmetric model, half-valued resistors and inductors are used for the end segments.
The resistance per unit length, r, is specified as a vector of length lines, which each element the resistance per length of the corresponding line.
The per-unit-length capacitance, conductance, and inductance parameters, c, g, and ℓ, respectively, are vectors of length 12⁢lines⁢lines+1 which specify the partial rows of the upper-triangular portion of a symmetric lines×lines matrix. For the segment shown in the first schematic, the capacitance matrix is
so the parameter c is 23.8,101,85.6,5.09,27.1,20.9,71.6,18.3,123,20.7⁢10−12. The g and ℓ parameters are specified in the same manner.
To connect to a particular line of the model, make the connection to the desired end, then select the line and use the drop-down menu in the Connections Manager to make the the connection to the desired line. The Connections Manager is found under the Properties tab whenever you select a connection line in the Model Workspace.
Conditional heat port
Length of line
Number of lines
Number of lumped segments
Capacitance per meter 
Conductance per meter 
Inductance per meter 
Resistance per meter, vector of length lines
Temperature coefficient of conductance, gactual=g1+α⁢T−Tref
Temperature coefficient of resistance,ractual=r⁢1+α⁢T−Tref
Fixed device temperature if Use Heat Port is false
Use Heat Port
True (checked) means heat port is enabled
 The c, g, and ℓ vectors are of length 12⁢lines⁢lines+1 and specify the upper-right triangular portion of a lines×lines symmetric matrix.
The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
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