Composite system reliability concepts in the evaluation of nonutility generation

Increasing global concerns regarding environmental, political and future energy problems have created considerable awareness of the need to develop nonconventional electrical energy sources. It is expected that nonutility generation (NUG) and cogeneration will increase their market share of the total energy mix as a result of the energy policies being adopted by many governments and power utilities around the world. The reliability and economic implications of these capacity additions can be quite significant. This paper illustrates the impacts of NUG facilities on system adequacy and reliability worth in both generation system and composite generation and transmission system assessment.