An overview of probabilistic aspects of harmonics: state of the art and new developments

The increased need for accurate power quality and harmonic studies requires more detailed and comprehensive models which take into account the time-varying and probabilistic nature of harmonic sources their interaction and summation. This ever-present time-varying nature of harmonics in power systems require a probabilistic treatment that needs to he incorporated in the harmonic analysis and studies. This time-varying behavior is due to continuous changes in system configurations, linear load levels and operating modes of nonlinear loads. This paper provides an overview of topics related to time-varying and probabilistic aspects of harmonics and which are being presently compiled (by the IEEE task force on probabilistic aspects of harmonics) in a comprehensive technical publication.