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MultiGround

MultiGround+, MultiGround and AutoGround are three powerful and high precision software packages dedicated to grounding analyses and conductive coupling studies. SES has developed these packages for engineers and scientists who specialize in grounding and conductive interference and who demand accurate, no-compromise solutions. The RESAP, MALT and FCDIST engineering modules make up the core of these software packages.

Put MultiGround to work...

  • Carry out and interpret resistivity measurements using Wenner, Schlumberger, or Dipole-Dipole techniques... or select your own arbitrary electrode spacing configuration. Select horizontal, vertical or exponential multilayered soil structures.
  • Analyze complex power system ground networks composed of arbitrarily oriented conductors located in multilayered soils (vertical, horizontal, spherical or cylindrical) or in soils with finite volumes with other resistivities, such as water upstream and downstream of a dam!
  • Hybrid energization by current or voltage can be applied to different conductor groups in the same simulation.
  • Investigate transferred potentials and currents diverted to uncoated pipelines or other metallic structures due to energized ground conductor networks.
  • Determine distortion effects caused by the proximity of multiple grounding networks.
  • Simulate complex anode beds and examine cathodic protection problems involving uncoated buried pipelines (use MultiFields for coated pipes)
  • Interpret ground resistance measurements made using the Fall-of-Potential method and other techniques.
  • Determine the fault current distribution between grounding systems and overhead ground wires, skywires, counterpoises, and other metallic paths.
  • You can automatically generate safety tables of touch and step voltages determined according to national, international or your own specific standards, as well as plots of grid "hotspots," to help you quickly refine your grounding designs.
  • You can very easily focus on dangerous zones and identify overdesigned regions to optimize your final design.


AUTOGROUND

AutoGround is similar to MultiGround, except that it handles uniform and two-Layer Horizontal soil grounding analyses. Note that AutoGround accurately interprets soil resistivity measurements corresponding to multilayered soil structures. AutoGround includes the RESAP, MALT and FCDIST engineering modules.

MULTIGROUND+

MultiGround+ is a version of MultiGround that has been extended to include the MultiLines package thereby adding the TRALIN and SPLITS engineering modules. The additional capabilities are:

  • Determines inductive and capacitive interference between energized and nonenergized conductors or metallic paths sharing the same right-of-way.
  • Computes conductor and cable constants (parameters) and capacitive and electromagnetic induction effects.
  • Develops detailed circuit models to calculate load and short-circuit current distributions in every section of a multiconductor, multi-phase power network, whether balanced or not.
  • Analyzes complex, multi-phase, multi-winding transformers in full detail.  Built-in single-phase and 3-phase multi-winding transformer models, including autotransformers, are also available.

MULTIGROUNDZ

This package adds the following features to the MultiGround software, making it the preferred tool for the study of large substations and plants:

  • Calculation of longitudinal impedances and voltage drops in grounding grid conductors. Whereas these voltage drops are scarcely noticeable in small grounding grids or even in large grounding grids in high resistivity soils, they can have a considerable influence on medium to large sized grounding grids in low to moderate soil resistivities or on long conductors such as pipes. Software that neglects voltage drops in grid conductors can dramatically underestimate grounding requirements near high voltage equipment and overestimate grounding requirements everywhere else. By accounting for conductor impedances, MALZ provides improved safety and reduced construction costs. MALZ also allows you to estimate voltage stresses on control cables running between two parts of an installation.
  • Modeling of coated conductors, such as pipelines and insulated cables. This means that you can calculate electrical potentials transferred to nearby buried pipes, associated coating stress or touch voltages, and potentials transferred by these pipes to remote locations. You can also correctly account for the grounding afforded by pipelines: these can easily reduce the ground impedance of a grounding grid by an order of magnitude and eliminate what might otherwise appear to be a major problem.
  • Multiple current injections, each with its own magnitude and phase angle, into different parts of each grounding system modeled, in order to account for circulating currents and the stress voltages they incur. This replaces the voltage energization available in plain MultiGround.
  • High frequency impedance of the grounding system.
  • Magnetic field calculation (above grade).
  • Polarized potential can be specified on each conductor for cathodic protection studies.

This additional power is obtained by adding the more complete MALZ program in the MultiGround package.

MULTIGROUNDZ+

This package adds the following features to the MultiGround+ software, making it the preferred tool for the study of large substations and plants:

  • Calculation of longitudinal impedances and voltage drops in grounding grid conductors. Whereas these voltage drops are scarcely noticeable in small grounding grids or even in large grounding grids in high resistivity soils, they can have a considerable influence on medium to large sized grounding grids in low to moderate soil resistivities or on long conductors such as pipes. Software that neglects voltage drops in grid conductors can dramatically underestimate grounding requirements near high voltage equipment and overestimate grounding requirements everywhere else. By accounting for conductor impedances, MALZ provides improved safety and reduced construction costs. MALZ also allows you to estimate voltage stresses on control cables running between two parts of an installation.
  • Modeling of coated conductors, such as pipelines and insulated cables. This means that you can calculate electrical potentials transferred to nearby buried pipes, associated coating stress or touch voltages, and potentials transferred by these pipes to remote locations. You can also correctly account for the grounding afforded by pipelines: these can easily reduce the ground impedance of a grounding grid by an order of magnitude and eliminate what might otherwise appear to be a major problem.
  • Multiple current injections, each with its own magnitude and phase angle, into different parts of each grounding system modeled, in order to account for circulating currents and the stress voltages they incur. This replaces the voltage energization available in plain MultiGround.
  • High frequency impedance of the grounding system.
  • Magnetic field calculation (above grade).
  • Polarized potential can be specified on each conductor for cathodic protection studies.
This additional power is obtained by adding the more complete MALZ program in the MultiGround+ package.
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