Welcome to the web page of ATPDraw


ATPDraw is a graphical, mouse-driven preprocessor to the ATP version of the Electromagnetic Transients Program (EMTP) on the MS-Windows platform. In ATPDraw the user can construct an electrical circuit using the mouse and selecting components from menus, then ATPDraw generates the ATP input file in the appropriate format based on "what you see is what you get". The simulation program ATP and plotting programs can be integrated with ATPDraw. A license is required to use the solver ATP.

This web-site has been in operation since 2012. Users can register with email authentication by passing a CAPTCHA and an EMTP quiz. The web-site offers discussion forums with nested discussions, images/document uploads  and search functionality. By registering on this web-site users also get access to latest ATPDraw downloads (NOT the solver tpbig.exe). The Web-site was updated to Bootstrap styles April 1, 2016. The ATPDraw program can also be registered with the same user name and password and this gives direct access to web-content including one-click upload and download of ATPDraw cases. More contributions from users are expected and requested. All cases are moderated.

Lately, the web-service provider has for security reasons blocked uploads of links to internal scripts. This have had inconvenient impact on links to Forum and Cases posts with blocking and time-limited banning of those who used it. In consequence, I thus had to change the approach to server side. Now, the user can link to Forum and Cases posts by typing #Fnnnn and #Cnnnn, respectively, where nnnn is the post number found in upper left corner of posts. The Forum and Cases links menu items in the editor were also removed, but the user might have to manually clear the browser's cached images/files to actually update the javascript.

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Graphical preprocessor to ATP

  • Electromagnetic transients program
  • Time-domain analysis or steady-state frequency scan
  • Lightning studies
  • Switching studies
  • Harmonic analysis
  • Insulation coordination
  • Power electronics & HVDC
  • Electrical machines
  • Control systems
  • Complex line- and cable parameters
  • Windows XP/7/8/10. 32-bit.
  • Extensive help file system, example files and User Manual 
All components

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New Version 7.0

Fundamental core update

  • Object oriented, polymorphism, unicode
  • Limits on objects (node, data, icon) removed
  • New Compile, Compress, Undo/Redo
  • New MODELS editor
  • XML import/export
  • Many new components
  • Many new examples
    • Insulation coordination
    • Machine controls
    • Power system protection
    • PV integration
  • New Users' Manual