Distributed Power Reserve Control in Grid-Connected Cascaded H-Bridge Converter-Based Photovoltaic Systems

Mina Haghighat; Hossein Dehghani Tafti; Mehdi Gholipour; Mehdi Niroomand; Christopher D. Townsend; Nestor Vazquez Barajas; Gaowen Liang; Georgios Konstantinou; Josep Pou

doi:10.1109/ACCESS.2024.3496518

IEEE Access (Jan 2024)

Distributed Power Reserve Control in Grid-Connected Cascaded H-Bridge Converter-Based Photovoltaic Systems

Mina Haghighat,
Hossein Dehghani Tafti,
Mehdi Gholipour,
Mehdi Niroomand,
Christopher D. Townsend,
Nestor Vazquez Barajas,
Gaowen Liang,
Georgios Konstantinou,
Josep Pou

Affiliations

Mina Haghighat: Department of Electrical Engineering, University of Isfahan, Isfahan, Iran
Hossein Dehghani Tafti: ORCiD; Department of Electrical Engineering, Engineering Institute of Technology (EIT), West Pert, WA, Australia
Mehdi Gholipour: ORCiD; Department of Electrical Engineering, University of Isfahan, Isfahan, Iran
Mehdi Niroomand: ORCiD; Department of Electrical Engineering, University of Isfahan, Isfahan, Iran
Christopher D. Townsend: ORCiD; Department of Electrical, Electronic and Computer Engineerings, University of Western Australia, West Pert, WA, Australia
Nestor Vazquez Barajas: Department of Electrical, Electronic and Computer Engineerings, University of Western Australia, West Pert, WA, Australia
Gaowen Liang: ORCiD; Energy Research Institute, Nanyang Technological University, Jurong West, Singapore
Georgios Konstantinou: ORCiD; School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, Australia
Josep Pou: ORCiD; Department of Electrical Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong

DOI: https://doi.org/10.1109/ACCESS.2024.3496518
Journal volume & issue: Vol. 12
pp. 168568 – 168580

Abstract

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Grid-connected photovoltaic (PV) systems enhance grid stability during frequency fluctuations by adopting power reserve control (PRC) and contributing to frequency regulation. The cascaded H-bridge (CHB) converter is a suitable choice for large-scale photovoltaic systems. This paper introduces a distributed PRC strategy designed for CHB-based PV systems, necessitating minimal inter-module communication and thus simplifying implementation. Each submodule (SM) within the CHB converter periodically engages in maximum power point tracking to assess the system’s total accessible PV power. Through coordinated control, the strategy evenly allocates the necessary power across sub-modules based on their PV power availability, offering a balanced power distribution while acknowledging operational constraints on power disparity among SMs. Simulation and experimental results confirm the efficiency of the proposed approach under various conditions, showcasing accurate PV power estimation, seamless transition between operating modes, fast dynamic response, and regulation of the dc-link voltages.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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