Aiming at defects of traditional harmonic detection in three-phase unbalanced condition, an improved ip-iq detecting method is proposed based on instantaneous reactive power theory. When power grid voltage unbalanced or voltage distortion, through coordinate transformation, trigonometric transforming and combination operation of the three-phase voltage, the fundamental positive sequence voltage is extracted, and the average filter string into the low pass filter (LPF) to reduce the ripples in fundamental positive sequence current. The improved method is more accurate and quick than traditional ip-iq detecting method when extracting positive sequence fundamental voltage, detecting the negative sequence current of power grid and harmonic reactive current, significantly to reduce THD of fundamental positive sequence current and the detection error caused by unbalance and distortion voltage. Simulative results verify the correctness and validity of theoretical analysis.
| Published in | Science Journal of Energy Engineering (Volume 4, Issue 3) |
| DOI | 10.11648/j.sjee.20160403.11 |
| Page(s) | 23-29 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2016. Published by Science Publishing Group |
Instantaneous Reactive Power, Unbalanced Power Grid, Fundamental, Positive Sequence Voltage Extracting, Average Filter, Harmonic Detection
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APA Style
Junli Wan, Hao Liu, Linjuan Wu, Shirun Cheng. (2016). A Method Based on Combination Operation of Detecting Harmonic in Unbalanced Power System. Science Journal of Energy Engineering, 4(3), 23-29. https://doi.org/10.11648/j.sjee.20160403.11
ACS Style
Junli Wan; Hao Liu; Linjuan Wu; Shirun Cheng. A Method Based on Combination Operation of Detecting Harmonic in Unbalanced Power System. Sci. J. Energy Eng. 2016, 4(3), 23-29. doi: 10.11648/j.sjee.20160403.11
AMA Style
Junli Wan, Hao Liu, Linjuan Wu, Shirun Cheng. A Method Based on Combination Operation of Detecting Harmonic in Unbalanced Power System. Sci J Energy Eng. 2016;4(3):23-29. doi: 10.11648/j.sjee.20160403.11
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Download@article{10.11648/j.sjee.20160403.11,
author = {Junli Wan and Hao Liu and Linjuan Wu and Shirun Cheng},
title = {A Method Based on Combination Operation of Detecting Harmonic in Unbalanced Power System},
journal = {Science Journal of Energy Engineering},
volume = {4},
number = {3},
pages = {23-29},
doi = {10.11648/j.sjee.20160403.11},
url = {https://doi.org/10.11648/j.sjee.20160403.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjee.20160403.11},
abstract = {Aiming at defects of traditional harmonic detection in three-phase unbalanced condition, an improved ip-iq detecting method is proposed based on instantaneous reactive power theory. When power grid voltage unbalanced or voltage distortion, through coordinate transformation, trigonometric transforming and combination operation of the three-phase voltage, the fundamental positive sequence voltage is extracted, and the average filter string into the low pass filter (LPF) to reduce the ripples in fundamental positive sequence current. The improved method is more accurate and quick than traditional ip-iq detecting method when extracting positive sequence fundamental voltage, detecting the negative sequence current of power grid and harmonic reactive current, significantly to reduce THD of fundamental positive sequence current and the detection error caused by unbalance and distortion voltage. Simulative results verify the correctness and validity of theoretical analysis.},
year = {2016}
}
TY - JOUR T1 - A Method Based on Combination Operation of Detecting Harmonic in Unbalanced Power System AU - Junli Wan AU - Hao Liu AU - Linjuan Wu AU - Shirun Cheng Y1 - 2016/09/13 PY - 2016 N1 - https://doi.org/10.11648/j.sjee.20160403.11 DO - 10.11648/j.sjee.20160403.11 T2 - Science Journal of Energy Engineering JF - Science Journal of Energy Engineering JO - Science Journal of Energy Engineering SP - 23 EP - 29 PB - Science Publishing Group SN - 2376-8126 UR - https://doi.org/10.11648/j.sjee.20160403.11 AB - Aiming at defects of traditional harmonic detection in three-phase unbalanced condition, an improved ip-iq detecting method is proposed based on instantaneous reactive power theory. When power grid voltage unbalanced or voltage distortion, through coordinate transformation, trigonometric transforming and combination operation of the three-phase voltage, the fundamental positive sequence voltage is extracted, and the average filter string into the low pass filter (LPF) to reduce the ripples in fundamental positive sequence current. The improved method is more accurate and quick than traditional ip-iq detecting method when extracting positive sequence fundamental voltage, detecting the negative sequence current of power grid and harmonic reactive current, significantly to reduce THD of fundamental positive sequence current and the detection error caused by unbalance and distortion voltage. Simulative results verify the correctness and validity of theoretical analysis. VL - 4 IS - 3 ER -
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