Visualization of System Security Boundary

ScreenshotVOB is a software program sponsored by EPRI (US) and developed by Powertech. It is for the real-time visualization of on-line DSA results, as well as display of PMU measurements. Currently, it accepts security assessment results in DSATools™ format and PMU data in IEEE C37.118 format.




  • Multi-user, web-hosted interface
  • Display of real-time as well as historical security assessment results stored in database
  • PMU data superimposed over on-line DSA result display
  • Base case and security limit (1-dimensional and 2-dimensional) displays
  • Details on security violations, critical contingencies, and related statistics
  • Various display options for analyzing results
  • Security limit comparisons and trending