The Power System Analysis Toolbox (PSAT) is a Matlab toolbox for electric power system analysis and simulation. The command line version of PSAT is also GNU Octave compatible. All operations can be assessed by means of graphical user interfaces (GUIs) and a Simulink-based library provides an user-friendly tool for network design.

PSAT is ditributed under the General Public License (GPL) and comes with no warranty conditions. The latest PSAT version can be downloaded here.

The main features of PSAT are: Power Flow; Continuation Power Flow; Optimal Power Flow; Small Signal Stability Analysis; Time Domain Simulation; Complete Graphical User Interface; User Defined Models; FACTS Models; Wind Turbine Models; Conversion of Data Files from several Formats; Export results to EPS, plain text, MS Excel and LaTeX files; Interfaces to GAMS and UWPFLOW Programs; Command Line Usage; and GNU Octave Compatibility.

A brief introduction to PSAT is available here. This presentation was given at the first IEEE panel session on Open Source Software at the PES Meeting of Montreal, Canada, on June 20, 2006. A didactical tutorial to PSAT is available here.

Letters of reference for PSAT are available here. If your University, Institution or Company is using PSAT, please send me a letter of reference. These letters are important for me in order to request funds to my University and, in turn, to keep developing PSAT.

The PSAT documentation is no longer provided for free. Please contact me for getting the details on how to obtain the full PSAT manual as well as any other assistance on PSAT. I am also available for defining as hoc appointments for developing specific features currently not implemented in PSAT.


PSAT Version Matlab GNU Octave

Please read the "no warranty" conditions below.

Last update: August 17, 2019.

No Warranty

Because the software package "PSAT" (hereinafter "the toolbox") is licensed free of charge, there is no warranty for the toolbox, to the extent permitted by applicable law. Except when otherwise stated in writing the copyright holders and/or other parties provide the toolbox "as is" without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchandability and fitness for a particular purpose. The entire risk as to the quality and performance of the toolbox is with you. Should the toolbox prove defective, you assume the cost of all necessary servicing, repair or correction.

In no event unless required by applicable law or agreed to in writing will any copyright holder, or any other party who may modify and/or redistribute the toolbox as permitted above, be liable to you for damages, including any general, special, incidental or consequential damages arising out of the use or inability to use the toolbox (including but not limited to loss of data or data being rendered inaccurate or losses sustained by you or third parties or a failure of the toolbox to operate with any other software), even if such holder or other party has been advised of the possibility of such damages.


The PSAT community has been grwoing quickly in recent years. If you want to share your experience with PSAT, ask a question or provide your own code, the PSAT Forum on Yahoo!© is the right place for you.

The PSAT forum is available here. Or, if you are not a member yet, join the PSAT Forum clicking on the button below.


Countries where PSAT is used are indicated in red in the map below. If you are using PSAT and your country is not in red, please let me know!

Version tracking and news

The version tracking and news on the development of PSAT is available here.