Provide an existing cable data file if you want to modify an existing case or use previously saved data for this device.

To open the previously saved version, click the OK button; in this case the data is saved within the device and not in a file.

Provide an existing EMTP-V3 (AUX) data file if you want to modify an existing old case.

This device will try to translate the existing file to create a line case data compatible with EMTPWorks/HYPERSIM. The user should verify if the translation has been performed correctly by opening the cable case data file with the first option on this page. 

The provided myfile.data will be converted to myfile.lin and can be opened using the first option on this page.

Indicates the number of cables in the system

In order to model a cross-bonded cable accurately, each major section must be modeled in detail. This means that each minor section of the cable must be modeled, and the sheath bonding and sheath grounding connections must be made explicitly using the HYPERSIM node names.

Such a detailed representation can be computationally intensive because modeling short cable segments of the order of 400 meters or so, requires a very small time step (a fraction of the travel time of the fastest propagation mode). Furthermore, a number of these major sections must be connected to represent the entire cable. For example, a 12 km cable with 400 m minor sections, would require a total of 30 6-phase cable models. Nevertheless, this type of detailed representation is necessary when sheath currents and voltages have to be assessed.

The detailed representation of each minor section of a cross-bonded cable is in some ways analogous to modeling a transposed overhead transmission line by representing each transposition section explicitly, and connecting the sending and receiving node names accordingly with HYPERSIM node names.

In the case of transmission lines, this situation can be approximated by assuming that the line is balanced, and using a single line where the elements of impedance and admittance matrices have been averaged to account for the effect of transposition.

A cross-bonding option is available in the Cable Data device to provide this type of approximation. If “Cross-bond the Sheaths” is selected, then the elements of the impedance and admittance matrices of the cable are averaged to reflect the effect of cross-bonding. The grounding of the sheaths is then controlled using the KPH parameter in the "Conductor data" table. Setting KPH = 0 for the sheaths, is equivalent to assuming that the sheaths are continuously grounded (at zero potential throughout the entire cable length).

In this case, the sheaths can be eliminated and a three-conductor approximation of a cross-bonded cable is obtained. This three-conductor approximation compares quite favorably with the detailed modeling of each minor section of a cross-bonded cable, and it is ideally suited for switching transient studies of cross-bonded cables, because of its computational speed and accuracy.

Phase-number of the conductor. Conductors of all cables must be given phase numbers starting from 1, with no gaps in phase numbering. For example, for a three conductor cable KPH = 1, 2, 3 is a legitimate numbering arrangement, while KPH = 1, 3, 4 is not.

Conductors with KPH = 0 will be grounded and all conductors with identical phase numbers will be bundled into a single equivalent conductor. The order of conductors in the Model Data File will be made according to the sequence defined by KPH.

This produces data for a cable model that is not implemented in HYPERSIM. Thus, is not covered in this documentation. 

The CP model (constant parameter cable model) assumes that the cable parameters R, L, and C are constant, and they are calculated at a user-supplied model frequency. This model considers L and C to be distributed ("ideal cable") and R to be lumped at three places (cable ends and cable middle). The shunt conductance G is assumed to be zero.

Taking into account the frequency dependence of the cable parameters (as modeled by the Wideband model) is an important factor for the accurate simulation of transients. However, the CP model is computationally faster and it is generally used as an alternative to model secondary lines or cables. The only type of matrix that can be calculated for this model is the Real Ti . It is evaluated at the entered “Model frequency”.

After entering all required data, the Model Data Calculation Function can be invoked from the “Save and run this case” data tab to generate the model data file. The model can be used with the CP line models (CP m-phase components) by selecting the model data file (also called “pun file”) through the “Load data file” option in the device data. Note that the number of phases of the selected CP line should correspond to the number of phases of the model generated in the pun file. The format of this file can be found in the documentation of the CP m-phase device. 

Breakpoint frequency (FG0) of the shunt conductance for all insulating layers. For all insulators, the shunt conductance G is described with the following function of frequency:

G = 2pi (FG0 + Frequency) * Loss Factor * Capacitance.

Before choosing to run this case, the user must provide a valid Case Data File identification which is the model identification and the device name. 
Generated model data is available in a model data file created by the Cable Data Calculation program.

• For the "CP m-phase" device users can load the generated model data into the device forms using the "Load data from file" option.
• For the "WB line" device the model data is selected in the WB fitter to generate line data.