A PQ Control Strategy using Feedback Linearization Theory for a Three-phase Four-wire Grid-Connected Inverter in an AC Battery

Tuan  AnhDo; Quang Nghia  Le; Quang Dich  Nguyen; Phuong  Vu

doi:10.6180/jase.202504_28(4).0019

A PQ Control Strategy using Feedback Linearization Theory for a Three-phase Four-wire Grid-Connected Inverter in an AC Battery

Tuan AnhDo^1,2, Quang Nghia Le¹, Quang Dich Nguyen², and Phuong Vu¹This email address is being protected from spambots. You need JavaScript enabled to view it.

¹School of Electrical and Electronic Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam

²Institute for Control Engineering and Automation, Hanoi University of Science and Technology, Hanoi, 100000, Viet Nam

Received: October 1, 2023
Accepted: March 26, 2024
Publication Date: June 22, 2024

Copyright The Author(s). 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 cited.

Download Citation: ||https://doi.org/10.6180/jase.202504_28(4).0019

Three-Phase Four-Leg (3P4L) Inverter is getting so much attention due to its ability to deal with unbalanced AC voltage sources that can be caused by grid/load faults. Recently, the flexibility of this converter to connect both the 1-phase and 3-phase grid systems in an AC battery application has further concern. It is very important to develop a control strategy that ensures a fast dynamic response and still maintains good tracking performance to help stabilize the system under severe conditions. To meet these requirements, a PQ control structure for the three-phase four-leg grid-connected inverter in a synchronous reference frame based on feedback linearization control ( FLC) is proposed. The active and reactive power is indirectly controlled via a current control loop using the instantaneous power theory, and then the Point of Common Coupling ( PCC) voltage can be stabilized. The feasibility of the study is proved and validated by the real-time simulation results.

Keywords: ACBattery; Power factor Correction; three-phase four-wire converter; P- Q control; feedback linearization control

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