Open AccessPhase delay solution based on instantaneous reactive power theory
Author(s) -
Mengzhen Zhao,
Jie Zhang,
Xin Zhang,
Wandong Zhou,
An-fei Xu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/675/1/012103
Subject(s) - control theory (sociology) , total harmonic distortion , three phase , harmonic , compensation (psychology) , current (fluid) , phase (matter) , ac power , computer science , amplitude , grid , filter (signal processing) , power (physics) , mathematics , voltage , physics , acoustics , control (management) , psychology , geometry , quantum mechanics , artificial intelligence , psychoanalysis , computer vision , thermodynamics
According to the theoretical detection method of instantaneous reactive power, the paper proposes a harmonic current detection method based on the combination of synchronous rotating coordinate system and PI control. This method adds PI adjustment after the filtering link to accurately track the current amplitude, realizes zero error control, and performs phase compensation on the rotating coordinate system to compensate the fixed phase delay time of the filter, so as to achieve the accuracy of the harmonic detection link. The analysis of the experimental results shows that the improved harmonic detection method is equally effective under the three-phase symmetrical load and three-phase asymmetrical load. Under three-phase symmetrical load conditions, the improved harmonic detection method reduces the THD of the grid current by 0.72% compared with the original method. Under three-phase asymmetrical load conditions, the improved method reduces the THD of the grid current by 0.11% compared to the original method.