Transmission reliability is tracked and managed byNERC, which as of 20 July 2006 now serves as the federalelectric reliability organization (ERO) under the jurisdiction of FERC. For decades, the primary reliability consideration used by NERC for transmission planning has been‘‘N-l.’’ For a system consisting of N major components,the N-1 criterion is satisfied if the system can performproperly with only N-1 components in service. An N-1analysis consists of a steady-state and a dynamic component
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