Compute RLC parameters of radial copper cables with single screen, based on conductor and insulator characteristics
[r,l,c,z] = power_cableparam(CableData)
power_cableparam opens the Cable Parameters Tool with the
default cable parameter values provided by Simscape™
Electrical™ Specialized Power Systems software.
[r,l,c,z] = power_cableparam(CableData) computes the impedances and
capacitances of a structure, CableData, that represents a set of cables that have a screen
CableData — Conductor and insulator characteristics
Conductor and insulator characteristics for a set of cables that have a screen conductor, specified as a structure with the following fields:
the number of cables
the frequency in hertz to be used to evaluate RLC parameters
the ground resistivity (in ohm.meters)
the number of strands contained in one phase conductor
diameter of one strand (in m)
DC resistivity of conductor in ohms*m.
relative permeability of the conductor material.
phase conductor outside diameter (in m)
DC resistivity of the screen conductor in ohms*m.
Total section of screen conductor (in m^2)
screen conductor internal diameter (in m)
screen conductor external diameter (in m)
Geometric Mean Distance between the cables.
phase-screen insulator internal diameter (in m)
phase-screen insulator external diameter (in m)
relative permittivity of the phase-screen insulator material.
outer screen insulator internal diameter (in m)
outer screen insulator external diameter (in m)
relative permittivity of the outer screen insulator material.
[r l c z] — Parameters of radial copper cables
Parameters of the radial copper cables, returned as a structure with the following fields:
Self resistance of phase conductor, in Ohm/Km
Self resistance of screen conductor, in Ohm/Km
Mutual resistance between the phase conductors, in Ohm/Km
Mutual resistance between phase and screen conductors, in Ohm/Km
Self inductance of phase conductor, in Henries/Km
Self inductance of screen conductor, in Henries/Km
Mutual inductance between the phase conductors, in Henries/Km
Mutual inductance between phase and screen conductor, in Henries/Km
Capacitance between the phase conductor and its screen conductor, in Farad/Km
Capacitance between the screen conductor and the ground, in Farad/Km
Self impedance of phase conductor, in Ohm/Km
Self impedance of screen conductor, in Ohm/Km
Mutual impedance between phase conductors, in Ohm/Km
Mutual impedance between phase and corresponding screen conductors, in Ohm/Km
Building the RLC Matrices
These computed resistances, impedances, and capacitances need to be organized into
2N-by-2N matrices that can be directly used in the
block you selected to model your cable. See the 4 Cables with screen (PI
model) block in the
The RLC matrices are defined as follows (the example is given for a 3-cable configuration):
For an example using the
power_cableparam function, see the