The Voltage Stability Toolbox (VST), a software environment that implements new computational methods for investigating power system voltage stability. These techniques, which include convergent load flow procedures that work near collapse points and can locate the precise Point of Collapse (PoC), involve computations that are more complex than conventional load flow methods. Compared to traditional methods, they require additional information (such as 2nd derivatives), which necessitates far more elaborate code for their implementation, and makes them computationally intensive. For these reasons, key elements of the VST are automatic model assembly, code generation, and code optimization. The current system integrates numerical and symbolic computing. It is built in MATLAB and exploits its symbolic toolbox (Maple) and GUI tools.
VST has the following functionality:
The system has been tested on the IEEE 5 bus, 14 bus, 30 bus, 57 bus, and 118 bus systems. VST can be downloaded below.
Voltage Stability Toolbox (VST) - PC/Unix Version
Voltage instability and collapse have become an increasing concern in planning, operation, and control of electric power systems. In order to understand the phenomena and mechanics of voltage instability,a powerful and user-friendly analysis tool is very helpful. Voltage Stability Toolbox (VST) developed at the Center for Electric Power Engineering, Drexel University combines proven computational and analytical capabilities of bifurcation theory and symbolic mplementation and graphical representation capabilities of MATLAB and its Toolboxes. It can be used to analyze voltage stability problem and provide intuitive information for power system planning, operation, and control.
Permission to use, copy, modify, and distribute this software and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and without fee is hereby granted, provided that any use properly credits the authors, i.e. "Voltage Stability Toolbox courtesy of Center for Electric Power Engineering, Drexel University". The authors make no representations or warranties about the suitability of the software, either express or implied, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, or non-infringement. The authors shall not be liable for any damages suffered by license as a result of using, modifying or distributing this software or its derivatives.
3.1 SOFTWARE AND SYSTEM REQUIREMENTS
To use VST you need :
The following analysis can be made with VST: