Harmonic source estimator for distribution systems by means of Bayesian and WLS approaches

The knowledge of the distribution system state is required to operate management and control issues, such as energy dispatching and protection coordination. The authors have proposed a novel procedure for harmonic source estimation, based on a Bayesian approach, aimed at giving distribution network operators information about the presence of harmonic producing loads, along with a key indication about the reliability of such information. In this paper a traditional Weighted Least-Squares (WLS) approach is also adapted to the harmonic sources estimation problem. Validation procedures are presented. The Bayesian and WLS methodologies are applied to a small distribution network, the obtained results are compared and analyzed.