CDEGS 2001 New Features

In This Issue
2000 in Review
by Simon Fortin, SES
Users' Group Meeting
by Bruno Simon, SES
Using HIFREQ for Analyzing Control Cable Transients
by S. G. Lodwig, ComEd
CDEGS Tips
by SES employees
CDEGS New Features
by Simon Fortin and Aditya Choubey, SES
Latest Technical Papers by SES
by SES employees
SES' New Web Site
by Bruno Simon, SES
Back to the Front Page
The CDEGS 2001 release scheduled for August 2001 will contain the following new features. It should be noted that a preview of this release will be available to the participants of the 2001 Users' Group Meeting.
 
 
TRALIN
A Radio Noise interfernece calculation module has been added. Radio interference generated by three-phase transmission lines can be performed for points or profiles on the soil's surface. A plotting utility can generate graphs for either fair wether, wet weather or heavy-rain conditions.
Right-Of-Way
  • It is now posible to calculate the maximum envelope of line-to-line (phase-to-phase, rail-to-rail,pipe-to-pipe, etc.) voltages for faults occuring on a given transmission line at regular intervals throughout the corridor (in the MonitorFault module).
  • Special sections have been introduced in the Preprocess module. This can be used to insert sections with arbitrary impedance such as opened sections and shorted sections (e.g. insulator(s) in a railway system), etc. at any locations of the corridor.
  • A new option for plotting the maximum Line-to-Line voltage in the Envelope Plot module is now available.
GraRep
The current state of the program can be saved to disk. This can be convenient for those who want to continue the session from a previous state without having to regenerate the plots and reports.
Output Toolbox
  • The Safety module now accounts for the Guide80-2000 new recommendations regarding the computation of foot resistance. A new option (called Guide80-2000) has been introduced for the foot resistance calculation method, and is now the default calculation method for the foot resistance.
  • Several plot elements can be modified for their color, line-width, and style. These include: axis, axis numbers, axis titles, plot title, legend text, labels, legend box, legend line, and plot curves.
  • For configuration plots in MALT, MALZ and HIFREQ, a new filter feature was introduced to allow finer control over which conductors are plotted. Also, new labeling options were introduced and it is now possible to produce color plots of the grid, with the color representing a physical quantity (GPR, Leakage Current, etc.)
SESGSE
A new option for calculating the grounding characteristics of buried circular electrode has been introduced. This option allows the computation of the ground resistance of a circular electrode of a given diameter, or, conversely, the required diameter for a circular electrode to match a given ground resistance.
CAD DXF Import/Export Utility
Support for several new types of CAD based DXF Polyline objects was introduced. This should make it unnecessary to "explode" the files prior to importing them in the CDEGS software. Also, the utility now recognizes the measurement units specified in the DXF file (if any) and automatically converts the data to the system of units expected by the CDEGS software.
SESCAD
  • A "drawing grid" was introduced. This consists of evenly spaced lines appearing in the background of the drawing. They can be used to snap conductors into place.
  • Several elements of the drawing can be modified for their color, line-width, and style.
  • A filter feature was introduced to help in quickly finding objects that satisfy various conditions.
  • A tool was introduced for building a simple tower. Also, several tools were created or modified to act upon all conductors in a selected path.
HIFREQ
The problems that affected the two-layer soil model in previous releases have been fixed. A multilayer soil model is now under development. Also, the computation of the current distribution in the network has been accelerated for cases where some of the conductors are not precisely aligned along one of the coordinate axes.
SPLITS
A model for a current source was introduced. Another energization method (the VI or "impedance" energization) was also introduced. This method allows you to specify simultaneously the current and voltage of the source. The program will use this information to compute an effective source impedance that can then be used in subsequent SPLITS runs.

Aditya Choubey, Senior Software Developer, SES


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