Toggle Main Menu Toggle Search

Open Access padlockePrints

Flexible Power Control of PV Grid-connected Quasi-Z Source Inverter under Unbalanced Faults

Lookup NU author(s): Dr Zhengyu Zhao, Dr Mohammed Elgendy, Dr Matthew Armstrong, Dr Musbahu MuhammadORCiD


Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


© The Institution of Engineering & Technology 2023.Under unbalanced grid voltages, the currents injected into the grid become non-sinusoidal and unbalanced. The unbalanced grid current and voltage may lead to double-frequency oscillations in the active and reactive power. This paper proposes a flexible power control method for the quasi-Z source inverter in PV grid-connected systems under unbalanced conditions. The proposed control strategy can inject a sinusoidal current and mitigate the double-frequency oscillation of the active or reactive power delivered to the network. Furthermore, an easy-to-implement current limitation strategy is proposed to protect the power converter and deliver maximum power to the grid. A non-MPPT mode is triggered to handle the injected current under severe faults. Finally, simulation results are presented to validate the theoretical analysis and controller design.

Publication metadata

Author(s): Zhao Z, Elgendy MA, Armstrong M, Muhammad M

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 12th International Conference on Renewable Power Generation (RPG 2023)

Year of Conference: 2023

Pages: 1033-1038

Acceptance date: 02/04/2023

Publisher: Institution of Engineering and Technology


DOI: 10.1049/icp.2023.2391

Library holdings: Search Newcastle University Library for this item

Series Title: IET Conference Proceedings

ISBN: 9781839539497