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Electrical Grounding Analysis

SKM GroundMat is a program for substation ground grid design and analysis. It is designed to help optimize grid design or reinforce existing grids of any shape. It uses a general-purpose finite element algorithm for potential analysis and graphical facilities to validate ground system efficiency.

Benefits:

  • 1. Design safer and more cost effective ground grids.
  • 2. Save time with graphical entry and display.
  • 3. Communicate designs more easily with professional reports and graphs.
  • 4. Evaluate alternatives quickly and easily to establish an optimal design.
  • 5. Save time with design wizard capabilities.
  • 6. PTW GroundMat is an important tool every power system engineer should have.

Solution Algorithms:

  • Finite element analysis of the ground conductors.
  • Finite element analysis of the ground rods.
  • Grid conductor current displacement using Matrix analysis.

Analysis Options:

  • Earth model analysis from field measurements.
  • User specified fault current.
  • Grid and Ground potential analysis.
  • Ability to analyze multiple ground systems.
  • Ability to analyze the potential rise for each grounding system including neighboring passive grids or rods.
  • Safety analysis including surface materials, based on body weight and exposure time.
  • Option to use IEEE Std. 80 or IEC Std. 479 for safety analysis.
  • Calculation of maximum permissible touch and step voltages.
  • Comprehensive report for grid and rod configuration.
  • Comprehensive report for surface potential analysis featuring station data and currents diffused to ground by the grid elements.
  • Danger point evaluation.
  • Touch voltage, step voltage, and earth potential analysis.

Interface Options:

  • Create and store alternative designs with a simple copy/paste.
  • Data entry for grid and rods in spreadsheet format.
  • Data entry for earth model in spreadsheet format.
  • Grid/rod/profile wizards to setup initial system.
  • 3D/2D representation of grid and rod configuration.
  • 3D display of touch voltage, step voltage, and earth potential plots.
  • Report viewer for text reports.
  • Cut, copy and paste grid/rod segments in spreadsheet.
  • Range-checking for simulation parameters.
  • User-defined thresholds for danger area evaluation.
  • User-defined color coding for graphical safety analysis.
  • Metric and English units.
  • Group print function.

Project setup Options:

  • Stores multiple study revisions for each project.
  • Expanding tree structure to manage project revisions.
  • Input data and output results saved for each study.
  • Copy, paste and rename study revisions to compare alternative designs.
  • Run studies for multiple study revisions as a single action.