CDEGS - SES technologies

By: Ses  09-12-2011
Keywords: Software tools, Software Package, Engineering Software

Introducing the CDEGS Software Package: Integrated Software for Power System Grounding/Earthing, Electromagnetic Fields and Electromagnetic Interference

The CDEGS software package (Current Distribution, Electromagnetic Fields, Grounding and Soil Structure Analysis) is a powerful set of integrated engineering software tools designed to accurately analyze problems involving grounding/earthing, electromagnetic fields, electromagnetic interference including AC/DC interference mitigation studies and various aspects of cathodic protection and anode bed analysis with a global perspective, starting literally from the ground up. CDEGS computes conductor currents and electromagnetic fields generated by an arbitrary network of energized conductors anywhere above or below ground for normal, fault, lightning and transient conditions. CDEGS models simple and multi-component conductors, including bare, coated pipes and pipe-enclosed cable systems buried in complex soil structures. CDEGS and its subpackages, coupled with toll-free support from the world’’s leading R&D design team in these specialties, provide you with an array of cost-effective solutions for problems ranging from simple grounding grid designs to the behavior of complex networks of aboveground and buried conductors energized by lightning or other transients. By providing you with a powerful drawing tool and allowing you to exchange graphical data with AutoCAD and other software supporting DXF, CDEGS makes data entry enjoyable. Flexible data reporting and graphing utilities allow you to collect and illustrate any aspect of the results that are important for your work. Whether you are confronted with a complex grounding design, EMF studies, electromagnetic compatibility and interference problems or a lightning/surge study, you can rely on CDEGS accurate, powerful and integrated software components for a realistic, optimized solution.

Extensive scientific validation of the software using field tests and comparisons with analytical or published research results have been conducted for over twenty years. The validation conducted by SES as well as other independent researchers is documented in hundreds of technical papers published in the most reputed international journals.

The CDEGS software package

SES started the development of the CDEGS software package in 1972, with the creation of the MALT engineering module. Since that time, CDEGS has undergone steady growth and refinement. It is composed of eight engineering modules , , , , , , , and . CDEGS also includes input and output processors and utilities (e.g., import or export tools to CAD software, graphic servers, text editors, etc.). The relationship between the input and output processors and the engineering modules is illustrated in the figure shown below.

Briefly stated, CDEGS capabilities are:

  • Soil resistivity analysis and soil structure interpretation.
  • Grounding analysis: arbitrary soil structures; any frequency & transients.
  • Line constants for overhead and buried conductors or complex pipe-enclosed cable arrangements.
  • Load, fault & transient current distribution (in neutrals, shields, etc.).
  • Cathodic protection analysis of complex buried networks.
  • Inductive, conductive and capacitive interference in shared corridors.
  • Frequency and time domain analysis of electromagnetic fields generated by arbitrarily energized conductor networks (substations, transmission & distribution lines, industrial plants, etc.).

The complete CDEGS package is made of eight integrated software packages:

The complete CDEGS package is made of eight main integrated software packages, three specialized packages and several software tools and utilities. The main packages are: , , , and . AutoGround and MultiGround are specialized for low frequency grounding / earthing analysis and design, while MultiFields is dedicated to frequency domain and transient grounding, electromagnetic interference and electromagnetic field computations. MultiLines is ideal for computing line parameters (line constants) of most conductors including complex buried and above ground pipe-type cables. MultiFields+ and MultiGround+ include the Multilines subpackage which consists of the TRALIN and SPLITS engineering modules. These last two modules are required to determine electric interference levels along utility rights-of-way. The three specialized packages are: , and . The software tools and utilities are: , , , , , , , , , and .

The AutoGround and MultiGround packages include the dedicated grounding / earthing software package AutoGrid Pro as well as the fully automated specialized grounding / earthing package AutoGroundDesign that can design a grounding system without user's intervention. All software packages that have the + (plus) label include the Right-Of-Way software package that is fully dedicated to the analysis of electromagnetic interference problems.

Each package is made up of a different combination of engineering modules as described in the table below.

AutoGround RESAP, MALT and FCDIST (with restriction on grounding analysis module)
MultiGround RESAP, MALT and FCDIST
MultiLines TRALIN and FCDIST

The Complete CDEGS package contains all of the above mentioned engineering modules. A short description of the module functions is given hereafter.

    latest versions / updates Note: to download or ftp the software updates / patches you must have a valid license account. Contact SES for more information.

Keywords: Cathodic Protection, Conductors, Electromagnetic Compatibility, Engineering Modules, Engineering Software, Engineering Software Tools, Integrated Engineering, Integrated Engineering Software, Interference Mitigation, Mitigation Studies, Software Package, Software tools,

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In the paper numerical results are presented for various configurations such as conductor systems, parallel plates, multiple plates forming a closed box and a complex system simulating a substation including bus bars, metallic supports and lighting protection masts under a huge charged cloud.


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