Improved Voltage Unbalance and Harmonics Compensation Control Strategy for an Isolated Microgrid

Mohammad Jafar Hadidian Moghaddam, Akhtar Kalam, Mohammad Reza Miveh, Amirreza Naderipour, Foad H. Gandoman, Ali Asghar Ghadimi and Zulkurnain Abdul-Malek
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Mohammad Jafar Hadidian Moghaddam: College of Engineering and Science, Victoria University, Melbourne 3047, Australia
Akhtar Kalam: College of Engineering and Science, Victoria University, Melbourne 3047, Australia
Mohammad Reza Miveh: Department of Electrical Engineering, Tafresh University, Tafresh 39518-79611, Iran
Amirreza Naderipour: Institute of High Voltage & High Current Faculty of Electrical Engineering Universiti Teknologi Malaysia, Johor 81300, Malaysia
Foad H. Gandoman: Research Group MOBI—Mobility, Logistics, and Automotive Technology Research Center, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
Ali Asghar Ghadimi: Electrical Engineering Department, Faculty of Engineering, Arak University, Arak 3815688349, Iran
Zulkurnain Abdul-Malek: Institute of High Voltage & High Current Faculty of Electrical Engineering Universiti Teknologi Malaysia, Johor 81300, Malaysia

Energies, 2018, vol. 11, issue 10, 1-26

Abstract: This paper suggests an enhanced control scheme for a four-leg battery energy storage systems (BESS) under unbalanced and nonlinear load conditions operating in the isolated microgrid. Simplicity, tiny steady-state error, fast transient response, and low total harmonic distortion (THD) are the main advantages of the method. Firstly, a new decoupled per-phase model for the three-phase four-leg inverter is presented. It can eliminate the effect of power stage coupling on control design; thus, the three-phase four-leg power inverter can be viewed as three single input single output (SISO) control systems. Then, using an improved orthogonal signal generation method, the per-phase model of the four-leg inverter in the stationary and synchronous frame is derived. As the second step, a per-phase multi-loop control scheme for the four-leg inverter under unbalanced load conditions is suggested. The proposed control strategy has the ability to provide balanced output voltages under unbalanced load conditions by avoiding the need to deal with the symmetrical components. Finally, a multi-resonant harmonic compensator is used to actively prevent low-order harmonic currents to distort the output voltages of the three-phase four-leg grid-forming power converter. Simulations results are also presented to verify the performance of the suggested control strategy.

Keywords: voltage unbalance; harmonics compensation; control strategy; battery energy storage systems (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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