Computer aided stability analysis of electrical energy systems and application

Nowadays consumption points demand a better quality and reliable energy because of increase in demand for energy, the necessity of large systems and progress of technology. Constant voltage and frequency come from at the beginning of the factors that constitute a quality energy. Trying to provide that the voltage and frequency values are constant at the approprite value is the stability of electrical power systems. System stability is defined as the ability of the system to return to pre-disturbing operating conditions after a disturbing effect. The system can only be operated if there is a conformity between the mechanical input and the electrical output. In this thesis, the importance of stability analysis, types, methods used in detail will be discussed and the stability analysis of the system will be carried out as a result of various failures such as phase-earth, two-phase-earth, three-phase-earth and two-phase short circuit, which may occur in the computer aided analysis and power systems of the transient stability of a type of stability analysis for multi-machine systems. In addition to package programs such as Power System Simulator for Engineering (PSS/e), Power System Simulator (Simpow), DigSilent, Eurostar, NEPLAN and PowerWorld, an alternative stability analysis program has been discussed. With this kind of work it will be beneficial for engineers and people who works in engineering area and materiality, time, knowledge and many other fields to make the determination of stability analysis in an error free and fast way will be useful for them in terms of power systems.