A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation

Crescent Onyebuchi Omeje

doi:doi:10.11648/j.jeee.20231101.14

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A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation

Crescent Onyebuchi Omeje

Published in Journal of Electrical and Electronic Engineering (Volume 11, Issue 1)

Received: 17 February 2023 Accepted: 7 March 2023 Published: 16 March 2023

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Abstract

This research was conducted to verify the significance of the LCL-filter on the grid current and the impact of variable fault resistance values on the reactive power genereated in a grid-tied inverter. The stability of LCL-type grid connected inverter with capacitor current feedback in active damping state was evaluated in this paper. The effects of balanced and unbalanced grid faults on the active and reactive power was studied through simulation at different fault resistance values of 0.00025Ω and 2.5Ω. The FFT waveforms showed that THD values of 48.56% and 38.45% were achieved for the grid voltage at 0.00025Ω and 2.5Ω fault resistance while THD values of 9.50% and 4.41% were obtained for the grid current at a varied current feedback coefficient (K_CP) of 4.75 and 14.75. Simulation results also showed that a very negligible real and reactive power was gained with a zero grid voltage within the fault zone at 0.00025Ω fault resistance. At a 2.5Ω fault resistance, a voltage sag was produced which accounted for the transient response in the real power generated and reactive power absorbed during the fault period. The result obtained from the root-locus plot showed that the loci for the derived LCL-filter current transfer function intersected at +j 8.734 and -j 8.734 which makes the system marginally stable All simulation procedures were realized in MATLAB/SIMULINK 2015.

Published in	Journal of Electrical and Electronic Engineering (Volume 11, Issue 1)
DOI	10.11648/j.jeee.20231101.14
Page(s)	34-42
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), 2023. Published by Science Publishing Group

Keywords

Micro-Grid, LCL-Type Grid-Connected Converter, Current Control, Real and Reactive Power, THD

References

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APA Style

Crescent Onyebuchi Omeje. (2023). A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation. Journal of Electrical and Electronic Engineering, 11(1), 34-42. https://doi.org/10.11648/j.jeee.20231101.14

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ACS Style

Crescent Onyebuchi Omeje. A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation. J. Electr. Electron. Eng. 2023, 11(1), 34-42. doi: 10.11648/j.jeee.20231101.14

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AMA Style

Crescent Onyebuchi Omeje. A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation. J Electr Electron Eng. 2023;11(1):34-42. doi: 10.11648/j.jeee.20231101.14

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@article{10.11648/j.jeee.20231101.14,
  author = {Crescent Onyebuchi Omeje},
  title = {A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation},
  journal = {Journal of Electrical and Electronic Engineering},
  volume = {11},
  number = {1},
  pages = {34-42},
  doi = {10.11648/j.jeee.20231101.14},
  url = {https://doi.org/10.11648/j.jeee.20231101.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jeee.20231101.14},
  abstract = {This research was conducted to verify the significance of the LCL-filter on the grid current and the impact of variable fault resistance values on the reactive power genereated in a grid-tied inverter. The stability of LCL-type grid connected inverter with capacitor current feedback in active damping state was evaluated in this paper. The effects of balanced and unbalanced grid faults on the active and reactive power was studied through simulation at different fault resistance values of 0.00025Ω and 2.5Ω. The FFT waveforms showed that THD values of 48.56% and 38.45% were achieved for the grid voltage at 0.00025Ω and 2.5Ω fault resistance while THD values of 9.50% and 4.41% were obtained for the grid current at a varied current feedback coefficient (KCP) of 4.75 and 14.75. Simulation results also showed that a very negligible real and reactive power was gained with a zero grid voltage within the fault zone at 0.00025Ω fault resistance. At a 2.5Ω fault resistance, a voltage sag was produced which accounted for the transient response in the real power generated and reactive power absorbed during the fault period. The result obtained from the root-locus plot showed that the loci for the derived LCL-filter current transfer function intersected at +j 8.734 and -j 8.734 which makes the system marginally stable All simulation procedures were realized in MATLAB/SIMULINK 2015.},
 year = {2023}
}

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TY  - JOUR
T1  - A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation
AU  - Crescent Onyebuchi Omeje
Y1  - 2023/03/16
PY  - 2023
N1  - https://doi.org/10.11648/j.jeee.20231101.14
DO  - 10.11648/j.jeee.20231101.14
T2  - Journal of Electrical and Electronic Engineering
JF  - Journal of Electrical and Electronic Engineering
JO  - Journal of Electrical and Electronic Engineering
SP  - 34
EP  - 42
PB  - Science Publishing Group
SN  - 2329-1605
UR  - https://doi.org/10.11648/j.jeee.20231101.14
AB  - This research was conducted to verify the significance of the LCL-filter on the grid current and the impact of variable fault resistance values on the reactive power genereated in a grid-tied inverter. The stability of LCL-type grid connected inverter with capacitor current feedback in active damping state was evaluated in this paper. The effects of balanced and unbalanced grid faults on the active and reactive power was studied through simulation at different fault resistance values of 0.00025Ω and 2.5Ω. The FFT waveforms showed that THD values of 48.56% and 38.45% were achieved for the grid voltage at 0.00025Ω and 2.5Ω fault resistance while THD values of 9.50% and 4.41% were obtained for the grid current at a varied current feedback coefficient (KCP) of 4.75 and 14.75. Simulation results also showed that a very negligible real and reactive power was gained with a zero grid voltage within the fault zone at 0.00025Ω fault resistance. At a 2.5Ω fault resistance, a voltage sag was produced which accounted for the transient response in the real power generated and reactive power absorbed during the fault period. The result obtained from the root-locus plot showed that the loci for the derived LCL-filter current transfer function intersected at +j 8.734 and -j 8.734 which makes the system marginally stable All simulation procedures were realized in MATLAB/SIMULINK 2015.
VL  - 11
IS  - 1
ER  -

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Author Information

Crescent Onyebuchi Omeje

Department of Electrical/Electronic Engineering, Faculty of Engineering, University of Port Harcourt, Port-Harcourt, Nigeria

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APA Style

Crescent Onyebuchi Omeje. (2023). A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation. Journal of Electrical and Electronic Engineering, 11(1), 34-42. https://doi.org/10.11648/j.jeee.20231101.14

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ACS Style

Crescent Onyebuchi Omeje. A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation. J. Electr. Electron. Eng. 2023, 11(1), 34-42. doi: 10.11648/j.jeee.20231101.14

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AMA Style

Crescent Onyebuchi Omeje. A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation. J Electr Electron Eng. 2023;11(1):34-42. doi: 10.11648/j.jeee.20231101.14

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@article{10.11648/j.jeee.20231101.14,
  author = {Crescent Onyebuchi Omeje},
  title = {A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation},
  journal = {Journal of Electrical and Electronic Engineering},
  volume = {11},
  number = {1},
  pages = {34-42},
  doi = {10.11648/j.jeee.20231101.14},
  url = {https://doi.org/10.11648/j.jeee.20231101.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jeee.20231101.14},
  abstract = {This research was conducted to verify the significance of the LCL-filter on the grid current and the impact of variable fault resistance values on the reactive power genereated in a grid-tied inverter. The stability of LCL-type grid connected inverter with capacitor current feedback in active damping state was evaluated in this paper. The effects of balanced and unbalanced grid faults on the active and reactive power was studied through simulation at different fault resistance values of 0.00025Ω and 2.5Ω. The FFT waveforms showed that THD values of 48.56% and 38.45% were achieved for the grid voltage at 0.00025Ω and 2.5Ω fault resistance while THD values of 9.50% and 4.41% were obtained for the grid current at a varied current feedback coefficient (KCP) of 4.75 and 14.75. Simulation results also showed that a very negligible real and reactive power was gained with a zero grid voltage within the fault zone at 0.00025Ω fault resistance. At a 2.5Ω fault resistance, a voltage sag was produced which accounted for the transient response in the real power generated and reactive power absorbed during the fault period. The result obtained from the root-locus plot showed that the loci for the derived LCL-filter current transfer function intersected at +j 8.734 and -j 8.734 which makes the system marginally stable All simulation procedures were realized in MATLAB/SIMULINK 2015.},
 year = {2023}
}

Copy | Download

TY  - JOUR
T1  - A Model Based LCL-Type Grid Connected Converter Under Balanced and Unbalanced Faults in a Micro-Grid Distributed Generation
AU  - Crescent Onyebuchi Omeje
Y1  - 2023/03/16
PY  - 2023
N1  - https://doi.org/10.11648/j.jeee.20231101.14
DO  - 10.11648/j.jeee.20231101.14
T2  - Journal of Electrical and Electronic Engineering
JF  - Journal of Electrical and Electronic Engineering
JO  - Journal of Electrical and Electronic Engineering
SP  - 34
EP  - 42
PB  - Science Publishing Group
SN  - 2329-1605
UR  - https://doi.org/10.11648/j.jeee.20231101.14
AB  - This research was conducted to verify the significance of the LCL-filter on the grid current and the impact of variable fault resistance values on the reactive power genereated in a grid-tied inverter. The stability of LCL-type grid connected inverter with capacitor current feedback in active damping state was evaluated in this paper. The effects of balanced and unbalanced grid faults on the active and reactive power was studied through simulation at different fault resistance values of 0.00025Ω and 2.5Ω. The FFT waveforms showed that THD values of 48.56% and 38.45% were achieved for the grid voltage at 0.00025Ω and 2.5Ω fault resistance while THD values of 9.50% and 4.41% were obtained for the grid current at a varied current feedback coefficient (KCP) of 4.75 and 14.75. Simulation results also showed that a very negligible real and reactive power was gained with a zero grid voltage within the fault zone at 0.00025Ω fault resistance. At a 2.5Ω fault resistance, a voltage sag was produced which accounted for the transient response in the real power generated and reactive power absorbed during the fault period. The result obtained from the root-locus plot showed that the loci for the derived LCL-filter current transfer function intersected at +j 8.734 and -j 8.734 which makes the system marginally stable All simulation procedures were realized in MATLAB/SIMULINK 2015.
VL  - 11
IS  - 1
ER  -

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