This book presents a nice Graphical User Interface based approach for solving electrical power system fault analysis problems. MATLAB, flagship software for scientific and engineering computation, is used for this purpose. Examples and problems from various widely used textbooks of power system are taken as reference so that results can be compared. This takes into account the fresh students having no idea about the course and can alone be used as a textbook. Help file is also provided with every module of the software keeping in mind that the software can be used as alternative to any textbook. It has been prepared for anyone who has little or no exposure to MATLAB. The programs were written in MATLAB 6 and are made compatible with most releases of MATLAB. The purpose of this book is to develop a fundamental idea about the power system fault analysis among the undergrads so that they can develop their own skills and aptitudes for solving real world power engineering fault analysis problems. Undergraduate students in electrical engineering having background of electrical machines and matrix algebra, who are interested in power system analysis, are encouraged to take a look.