SSAT™
SMALL SIGNAL ANALYSIS TOOL
SSAT™ is a software tool designed for power system analysis with linearized system models. It includes a number of analysis functions, in both frequency- and time-domain. Study tools are provided for addressing specific problems, making it ideal for investigating oscillatory behavior in power systems and for designing and tuning controls to improve system damping. Like VSAT and TSAT, SSAT can be used to calculate small signal security limits under specified criteria, contingencies, and transfer conditions.
Applications
Studies of low-frequency oscillations
Transmission system design and operation studies, including small signal security limit assessment
IPP and renewable integration studies
Investigation of sensitivity of system parameters on modes of oscillations
Development and validation of system models
Performance of power system stabilizer design and tuning using CDT add-on module
Performance of subsynchronous resonance analysis using SSR add-on module
On-line small signal security assessment
Features
Eigenvalue analysis based on analytical linearization of the system equations
Various eigenvalue solvers for specific types of modes, such as inter-area modes, local modes, etc.
Frequency response and time-domain step response calculations
Comprehensive model library, including user-defined models, renewable generation models, special protection system models, and FACTS/HVDC models
No limitation on system model size
Easy-to-use graphical interface for data setup, program operation, and output analysis
Compatibility with major third-party input data formats
