Power System Toolbox (PST) - Comprehensive MATLAB-Based Power System Analysis Suite

In the field of power system analysis, there exists a highly renowned open-source software package that covers three major power system computations, helping learners better understand and apply power system analysis methods. This MATLAB-based toolbox was originally developed by me and Dr. Kwok W. Cheung in the early 1990s and has been substantially upgraded and improved in recent years by Dr. Graham Rogers of Cherry Tree Scientific Software. The package implements core power system algorithms including Newton-Raphson power flow computation, eigenvalue analysis for stability studies, and numerical integration methods for dynamic simulations. Important note: This is free software that does not come with official support. However, users can learn to use the software by reading the manual or referring to relevant textbooks. Recently, chowj has updated to the latest version and shared it with the community. The updated version includes additional functionalities such as enhanced GUI interfaces, improved numerical methods for faster convergence, and extended model libraries for modern power system components, helping users better understand power system analysis and its applications. The toolbox features modular code architecture with separate functions for load flow calculation (lfgauss.m), transient stability analysis (s_simu.m), and small-signal stability assessment (eigol.m).