⁹Matlab is available from The MathWorks, Inc. (https://www.mathworks.com/). Matpower 5 and Matpower 6 required Matlab 7 (R14), Matpower 4 required Matlab 6.5 (R13), Matpower 3.2 required Matlab 6 (R12), Matpower 3.0 required Matlab 5 and Matpower 2.0 and earlier required only Matlab 4. Matlab is a registered trademark of The MathWorks, Inc.