Modelling and prediction of current harmonics generated by power converters in distribution networks

Predicting current harmonics in distribution networks is essential to find harmonic losses and power quality indices. In order predict the harmonics, effect of grid impedance voltage distortions on grid-connected converters need be considered. The effects these parameters can nonlinear, which complicates system analysis. Consequently, this paper investigates impacts background impedance, multi-parallel at a point common coupling. Moreover, novel method called combined least squares kriging (CLSK) proposed after evaluating level nonlinearity. CLSK method, prediction model developed by measured coupling identify harmonics. This analysis shows that using accuracy increased compared existing methods. efficiency are verified lab experimental results field measurement data.