Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect

Xuan Hoa Thi Pham; Toi Thanh Le; Hieu Tran Trong

doi:doi:10.11648/j.epes.20190805.15

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Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect

Xuan Hoa Thi Pham, Toi Thanh Le, Hieu Tran Trong

Published in American Journal of Electrical Power and Energy Systems (Volume 8, Issue 5)

Received: 2 October 2019 Accepted: 21 October 2019 Published: 25 October 2019

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Abstract

This paper presents a power sharing control method for use between paralleled three-phase inverters in an islanded microgrid. In this study, the mismatch of power sharing when the line impedances have significant differences for inverters connected to a microgrid has been solved, the accuracy of power sharing in an islanded microgrid is improved, the voltage droop slope is tuned to compensate for the mismatch in the voltage drops across line impedances by using communication links. The method will ensure in accurate power sharing even if the communication is interrupted. If the load changes while the communication is interrupted, the accuracy of power sharing is reduced but the proposed method is better than the conventional droop control method. In addition, the accuracy of power sharing base on the proposed method is not affected by the time delay in the communication channel and local loads at the output of the inverters. The control model has been simulated in Matlab/Simulink with two or three inverters are connected in parallel. Simulation results demonstrate the accuracy of the proposed control method. Futhermore, in order to validate the theoretical analysis and simulation results, an experimental setup was built in the laboratory. Results obtained from the experimental setup verify the effectiveness of the proposed method.

Published in	American Journal of Electrical Power and Energy Systems (Volume 8, Issue 5)
DOI	10.11648/j.epes.20190805.15
Page(s)	127-144
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), 2019. Published by Science Publishing Group

Keywords

Droop Control, Power Sharing, Microgrid Control, Parallel Inverter, Line Impedance

References

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APA Style

Xuan Hoa Thi Pham, Toi Thanh Le, Hieu Tran Trong. (2019). Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect. American Journal of Electrical Power and Energy Systems, 8(5), 127-144. https://doi.org/10.11648/j.epes.20190805.15

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ACS Style

Xuan Hoa Thi Pham; Toi Thanh Le; Hieu Tran Trong. Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect. Am. J. Electr. Power Energy Syst. 2019, 8(5), 127-144. doi: 10.11648/j.epes.20190805.15

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AMA Style

Xuan Hoa Thi Pham, Toi Thanh Le, Hieu Tran Trong. Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect. Am J Electr Power Energy Syst. 2019;8(5):127-144. doi: 10.11648/j.epes.20190805.15

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@article{10.11648/j.epes.20190805.15,
  author = {Xuan Hoa Thi Pham and Toi Thanh Le and Hieu Tran Trong},
  title = {Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {8},
  number = {5},
  pages = {127-144},
  doi = {10.11648/j.epes.20190805.15},
  url = {https://doi.org/10.11648/j.epes.20190805.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20190805.15},
  abstract = {This paper presents a power sharing control method for use between paralleled three-phase inverters in an islanded microgrid. In this study, the mismatch of power sharing when the line impedances have significant differences for inverters connected to a microgrid has been solved, the accuracy of power sharing in an islanded microgrid is improved, the voltage droop slope is tuned to compensate for the mismatch in the voltage drops across line impedances by using communication links. The method will ensure in accurate power sharing even if the communication is interrupted. If the load changes while the communication is interrupted, the accuracy of power sharing is reduced but the proposed method is better than the conventional droop control method. In addition, the accuracy of power sharing base on the proposed method is not affected by the time delay in the communication channel and local loads at the output of the inverters. The control model has been simulated in Matlab/Simulink with two or three inverters are connected in parallel. Simulation results demonstrate the accuracy of the proposed control method. Futhermore, in order to validate the theoretical analysis and simulation results, an experimental setup was built in the laboratory. Results obtained from the experimental setup verify the effectiveness of the proposed method.},
 year = {2019}
}

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TY  - JOUR
T1  - Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect
AU  - Xuan Hoa Thi Pham
AU  - Toi Thanh Le
AU  - Hieu Tran Trong
Y1  - 2019/10/25
PY  - 2019
N1  - https://doi.org/10.11648/j.epes.20190805.15
DO  - 10.11648/j.epes.20190805.15
T2  - American Journal of Electrical Power and Energy Systems
JF  - American Journal of Electrical Power and Energy Systems
JO  - American Journal of Electrical Power and Energy Systems
SP  - 127
EP  - 144
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20190805.15
AB  - This paper presents a power sharing control method for use between paralleled three-phase inverters in an islanded microgrid. In this study, the mismatch of power sharing when the line impedances have significant differences for inverters connected to a microgrid has been solved, the accuracy of power sharing in an islanded microgrid is improved, the voltage droop slope is tuned to compensate for the mismatch in the voltage drops across line impedances by using communication links. The method will ensure in accurate power sharing even if the communication is interrupted. If the load changes while the communication is interrupted, the accuracy of power sharing is reduced but the proposed method is better than the conventional droop control method. In addition, the accuracy of power sharing base on the proposed method is not affected by the time delay in the communication channel and local loads at the output of the inverters. The control model has been simulated in Matlab/Simulink with two or three inverters are connected in parallel. Simulation results demonstrate the accuracy of the proposed control method. Futhermore, in order to validate the theoretical analysis and simulation results, an experimental setup was built in the laboratory. Results obtained from the experimental setup verify the effectiveness of the proposed method.
VL  - 8
IS  - 5
ER  -

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Author Information

Xuan Hoa Thi Pham

Department of Electrical and Electronic Engineering, University of Food Industry, Ho Chi Minh City, Vietnam
Toi Thanh Le

Department of Electrical and Electronic Engineering, University of Food Industry, Ho Chi Minh City, Vietnam
Hieu Tran Trong

Department of Electrical and Electronic Engineering, University of Food Industry, Ho Chi Minh City, Vietnam

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APA Style

Xuan Hoa Thi Pham, Toi Thanh Le, Hieu Tran Trong. (2019). Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect. American Journal of Electrical Power and Energy Systems, 8(5), 127-144. https://doi.org/10.11648/j.epes.20190805.15

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ACS Style

Xuan Hoa Thi Pham; Toi Thanh Le; Hieu Tran Trong. Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect. Am. J. Electr. Power Energy Syst. 2019, 8(5), 127-144. doi: 10.11648/j.epes.20190805.15

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AMA Style

Xuan Hoa Thi Pham, Toi Thanh Le, Hieu Tran Trong. Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect. Am J Electr Power Energy Syst. 2019;8(5):127-144. doi: 10.11648/j.epes.20190805.15

Copy | Download

@article{10.11648/j.epes.20190805.15,
  author = {Xuan Hoa Thi Pham and Toi Thanh Le and Hieu Tran Trong},
  title = {Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect},
  journal = {American Journal of Electrical Power and Energy Systems},
  volume = {8},
  number = {5},
  pages = {127-144},
  doi = {10.11648/j.epes.20190805.15},
  url = {https://doi.org/10.11648/j.epes.20190805.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.epes.20190805.15},
  abstract = {This paper presents a power sharing control method for use between paralleled three-phase inverters in an islanded microgrid. In this study, the mismatch of power sharing when the line impedances have significant differences for inverters connected to a microgrid has been solved, the accuracy of power sharing in an islanded microgrid is improved, the voltage droop slope is tuned to compensate for the mismatch in the voltage drops across line impedances by using communication links. The method will ensure in accurate power sharing even if the communication is interrupted. If the load changes while the communication is interrupted, the accuracy of power sharing is reduced but the proposed method is better than the conventional droop control method. In addition, the accuracy of power sharing base on the proposed method is not affected by the time delay in the communication channel and local loads at the output of the inverters. The control model has been simulated in Matlab/Simulink with two or three inverters are connected in parallel. Simulation results demonstrate the accuracy of the proposed control method. Futhermore, in order to validate the theoretical analysis and simulation results, an experimental setup was built in the laboratory. Results obtained from the experimental setup verify the effectiveness of the proposed method.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Control Power Sharing of Parallel Inverters in Microgrid with Consideration of Line Impedance Effect
AU  - Xuan Hoa Thi Pham
AU  - Toi Thanh Le
AU  - Hieu Tran Trong
Y1  - 2019/10/25
PY  - 2019
N1  - https://doi.org/10.11648/j.epes.20190805.15
DO  - 10.11648/j.epes.20190805.15
T2  - American Journal of Electrical Power and Energy Systems
JF  - American Journal of Electrical Power and Energy Systems
JO  - American Journal of Electrical Power and Energy Systems
SP  - 127
EP  - 144
PB  - Science Publishing Group
SN  - 2326-9200
UR  - https://doi.org/10.11648/j.epes.20190805.15
AB  - This paper presents a power sharing control method for use between paralleled three-phase inverters in an islanded microgrid. In this study, the mismatch of power sharing when the line impedances have significant differences for inverters connected to a microgrid has been solved, the accuracy of power sharing in an islanded microgrid is improved, the voltage droop slope is tuned to compensate for the mismatch in the voltage drops across line impedances by using communication links. The method will ensure in accurate power sharing even if the communication is interrupted. If the load changes while the communication is interrupted, the accuracy of power sharing is reduced but the proposed method is better than the conventional droop control method. In addition, the accuracy of power sharing base on the proposed method is not affected by the time delay in the communication channel and local loads at the output of the inverters. The control model has been simulated in Matlab/Simulink with two or three inverters are connected in parallel. Simulation results demonstrate the accuracy of the proposed control method. Futhermore, in order to validate the theoretical analysis and simulation results, an experimental setup was built in the laboratory. Results obtained from the experimental setup verify the effectiveness of the proposed method.
VL  - 8
IS  - 5
ER  -

Copy | Download