Evaluation of an overhead line forecast rating algorithm

A forecast rating scheme that accounts for the cyclic and random variation in ratings over time is essential to practical field application of dynamic overhead line rating. In principle, dynamic line ratings apply only for the instant in time in which the field data are measured. As time proceeds, the likelihood that the dynamic line ratings continue to remain valid diminishes. A forecast rating scheme is evaluated, and the degree of conservatism that needs to be applied if dynamic line rating is to be a viable field concept is identified