Method of transmission power networks reliability estimation

Power supply reliability is one of the main criteria in estimation of power system networks. There have been many power system blackouts during the last years, which have resulted interruption in power supply and big material loses in many countries all over the world. In order to prevent similar problems in a future it is necessary to elaborate new methods of power supply reliability assessment, which will use power network modernization and development. One of these methods is developed and examined in this paper. This reliability problems, which is devote modern, scientific and economic power system planning criteria and this calculation methods, review and assessment, is very actual.