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Harmonic distortion degradation and filter optimization based on sensitivity studies with considering resonance issue
Author(s) -
Hu Haitao,
He Zhengyou,
Gao Shibin
Publication year - 2015
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22114
Subject(s) - thd analyzer , total harmonic distortion , harmonics , sensitivity (control systems) , harmonic , resonance (particle physics) , electrical impedance , voltage , control theory (sociology) , acoustics , engineering , physics , electronic engineering , computer science , intermodulation , electrical engineering , atomic physics , control (management) , amplifier , cmos , artificial intelligence
Voltage distortions are characterized by the harmonic spectrum of the nonlinear load (NLL) and harmonic impedance of the whole system. On one hand, the harmonic impedance is at the peak value when the frequency is at the resonance point, which leads to serious voltage distortions. On the other hand, harmonic distortions will be excited from excessive harmonic emission without resonance. In order to address the above causes, shifting the resonance frequency sensitivity (RFS) and the critical individual harmonic voltage distortion (IHD V ) sensitivity (IHDS) indices are presented here to control the critical IHD V and total harmonic voltage distortion (THD V ). The main idea is to find and adjust the most sensitive network parameter against these sensitivity indices until the harmonic distortion reaches the required value. A three‐bus test system and the IEEE 14‐bus system are used to verify the proposed method. Comparison of the results shows that these indices complement each other for solving the harmonics problems with or without harmonic resonance. The sensitivity‐based methods can be effective for system optimization and filter design by considering harmonic resonance. © 2015 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.