Determination of Harmonic Current Contributions of Plants Supplied from PCC Based on State Estimation

Sezgin E., GÖL M., Salor O.

23nd Signal Processing and Communications Applications Conference (SIU), Malatya, Turkey, 16 - 19 May 2015, pp.2062-2065 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/siu.2015.7130274
  • City: Malatya
  • Country: Turkey
  • Page Numbers: pp.2062-2065
  • Keywords: Harmonic Current Contribution, Power Quality, State Estimation Weighted Least Squares Estimation
  • Middle East Technical University Affiliated: Yes


In this paper, a state estimation based method is proposed to determine harmonic current contributions of plants supplied from a Point of Common Coupling (PCC). By using Weighted Least Squares (WLS) state estimation, it is aimed to improve harmonic voltage measurements acquired from conventional voltage transformers, which are employed commonly in the power systems. Using measured harmonic currents and estimated harmonic voltages, harmonic contributions of all plants have been determined by employing the Norton equivalent circuits of the plants and the superposition theorem. Absence of reliable harmonic voltage measurements necessitates employing harmonic filter current measured from at least one of the plants. Using the new measurement set built after the estimation process, a model to determine the harmonic current contribution of plants supplied from a PCC has been developed.