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New Power Quality Index in a Distribution Power System by Using RMP Model

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3 Author(s)
Soon Lee ; Electro-Mechanical Research Institute, Hyundai Heavy Industries Co., Ltd., Yongin, Korea ; Jung-Wook Park ; Ganesh Kumar Venayagamoorthy

In this paper, a new power quality index (PQI), which is directly related to the generation of distortion power from nonlinear harmonic loads, is introduced to determine their harmonic pollution ranking in a distribution power system. The electric load composition rate (LCR) and the total harmonic distortion (THD) for the estimated currents on each harmonic load are used to define the proposed PQI. The reduced multivariate polynomial (RMP) model with one-shot training property is applied to realize the PQI. Then, the ranking of distortion power for each nonlinear load, which has adverse effect on the entire system, is determined. It is proven that the relative ranking based on the PQI matches that based on the distortion power directly computed from each harmonic load.

Published in:

IEEE Transactions on Industry Applications  (Volume:46 ,  Issue: 3 )