TSAT™ is a leading-edge time-domain simulation tool designed for comprehensive assessment of dynamic behavior of power systems. TSAT includes a rich model library, state-of-the-art solvers, useful analysis features, and a highly intuitive user interface. Like VSAT and SSAT, TSAT can be used to calculate transient security limits under specified criteria, contingencies, and transfer conditions.


  • Studies involving rotor angle, voltage, or frequency stability

  • Transmission system design and operation studies including transient security limit assessment

  • NERC compliancy studies (such as TPL, CIP, etc.)

  • IPP and renewable integration studies

  • Development and validation of system models

  • Design and setpoint determination of special protection systems

  • Control tuning and protection coordination

  • Streamlining of PMU data using the ePMU add-on module

  • Post-mortem analysis of incidents

  • On-line transient security assessment


  • Full nonlinear time-domain simulation engine with choice of numerical integration methods

  • Security assessment based on criteria for transient stability, damping, transient voltage/frequency, relay margins, and others

  • Comprehensive model library, including user-defined models, renewable generation models, special protection system models, and FACTS/HVDC models

  • Determination of 1-dimensional and 2-dimensional transient security limits

  • Capabilities for processing multiple contingencies, transfers, and study scenarios in single analysis session

  • Wide selection of contingency types and system quantities for monitoring

  • Post-simulation processing tools, such as stability index calculations, Prony analysis, etc.

  • Easy-to-use graphical interface for data setup, program operation, and output analysis

  • Distributed computation for processing large number of contingencies and transfers

  • Compatibility with major third-party input data formats

DSAToolsCoreBrad Yuen