Cited by 7Optimal Power Flow DistributionSmart Grid Energy ManagementPower Quality and Harmonics

Increasing PV hosting capacity with phase rebalancing in LV networks: A network-agnostic rule-based approach

Open access
Hou, Yushan, Givisiez, Arthur Gonçalves, Liu, Michael Z., Ochoa, Luis F.·2025·Sustainable Energy, Grids and Networks

Abstract

Most residential photovoltaic (PV) systems are single-phase installations and, therefore, can increase unbalance. More unbalance exacerbates voltage rise issues on certain phases, potentially limiting the PV hosting capacity of low voltage (LV) networks. Rebalancing customers by adequately switching their phase connection can reduce unbalance and improve voltage headroom, allowing for more PV systems. However, this needs to be done quickly to cater for the normal variations in net demand. Furthermore, since most distribution companies do not have accurate, detailed three-phase LV network models, a solution independent of such models is desirable so it can be implemented. This paper proposes a fast, network-agnostic rule-based rebalancing approach that only requires knowledge of the phase groups, i.e., no network models are needed. Its feasibility is mathematically proven, and its effectiveness is benchmarked against a model-driven AC Optimal Power Flow (OPF)-based approach formulated as MINLP. Using a realistic Australian LV feeder with 29 single-phase customers, results show that the proposed approach mitigates unbalance as effectively as the OPF-based approach, in sub-seconds and without network models. Crucially, this paper demonstrates how a practical and scalable approach to reduce unbalance in two Australian LV networks—with different number of LV feeders and customers—can significantly increase the PV hosting capacity without resorting to PV curtailment.

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Crossref · 10.1016/j.segan.2024.101615

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Research works printed but not linked: 2

  1. A. Navarro-Espinosa, L.F. Ochoa, R. Shaw, and D. Randles, Reconstruction of low voltage networks: from GIS data To power flow models. In: Proceedings of the CIRED 2015 – The 23rd International Conference on Electricity Distribution, Lyon, 2015.
  2. J.Duncan Glover, Mulukutla S. Sarma, and Thomas J. Overbye, Power system analysis and design. fifth ed. pp. 62–63.

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Authors
Hou, Y., Givisiez, A. G., Liu, M. Z., & Ochoa, L. F.
Venue
Sustainable Energy, Grids and Networks
Publisher
Elsevier BV
Published
2025-03
Volume
41
Pages
101615
ISSN
2352-4677 (ISSN-L)
OpenAlex
W4405835000
Cited by
7
References
28
Citations by year
2026: 4 · 2025: 3
FWCI
0.72
Type
journal article
Language
en
Open access
Locations
  • Sustainable Energy Grids and Networks (publishedVersion, cc-by)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Optimal Power Flow Distribution
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Smart Grid Energy Management
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Power Quality and Harmonics
Keywords
photovoltaic hosting capacity, three-phase unbalance, low-voltage distribution networks, voltage rise mitigation, phase switching

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