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Abstract

This paper proposes a new control sharing method for parallel three-phase inverters in an islanded microgrid. The proposed technique uses adaptive PIDs combined with the communication among the parallel inverters to accurately share active power and reactive power among the inverters via adjusting the desired voltage if there is a distinct difference between line impedance and the load change in the microgrid. Moreover, the paper also presents the response ability of the inverters to maintain the error within the allowed limits as the transmission line is interrupted. The proposed technique has been verified in a microgrid with three parallel distributed generation-inverter units using Matlab/Simulink. In the simulation, as the droop control using the communication information among the inverters, the sharing errors for active power and reactive power are around 0.2% and 0.6%, respectively. As the connection between the microgrid and transmission line is interrupted, the sharing errors for active power and reactive power increase to 0.4% and 2%, respectively. The simulation results have indicated that the proposed technique is superior to the traditional droop control in terms of the accuracy and stability. Therefore, the new proposed technique can be a favor alternative model for active power and reactive power sharing control of parallel inverters in an islanded microgrid.



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Article Details

Issue: Vol 19 No 4 (2016)
Page No.: 14-34
Published: Dec 31, 2016
Section: Engineering and Technology - Research article
DOI: https://doi.org/10.32508/stdj.v19i4.779

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Creative Commons License

Copyright: The Authors. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 How to Cite
Le, P., Hoang, D., Pham, H., Nguyen, H., & Vo, D. (2016). A New Adaptive Control Strategy of active and reactive power sharing in Islanded Microgrids. Science and Technology Development Journal, 19(4), 14-34. https://doi.org/https://doi.org/10.32508/stdj.v19i4.779

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