ABSTRACT
The bulk power system is a combination of three main parts: generation, transmission, and distribution. The main terms used in the electric industry are the reliable and unreliable system. The performance of the power system is measured by calculating the reliability. A multiplicity of factors must be considered of bulk power systems. This will help in the reliability assessment. The functional zones of generation, transmission, and distribution are representing a complete electric power system. The adequacy and operating reliability is a procedure to measure the ability of the power system to supply electric power. The adequacy term is the measurement of the capability of the power system to supply the load in all the steady states.
