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Comprehensive optimal photovoltaic inverter control strategy in unbalanced three-phase four-wire low voltage distribution networks

journal contribution
posted on 06.12.2017, 00:00 by X Su, M Masoum, Peter WolfsPeter Wolfs
The continuous expansion of consumer-driven installations of residential rooftop photovoltaic (PV) systems causes serious power quality, notable voltage variations and unbalance, which limit the number and capacity of the further connections. The latent reactive power capability of PV inverters can increase the network PV hosting capability. This paper proposes both reactive power control and real power curtailment as a comprehensive inverter control strategy to improve the operating performance of unbalanced three-phase four-wire low voltage (LV) distribution networks with high penetrations of residential PV systems. A multi-objective optimal power flow (OPF) problem that can simultaneously improve voltage magnitude and balance profiles while minimizing network loss and generation costs is defined. The solution is found using the global solver based on Sequential Quadratic Programming (SQP) algorithm with multiple starting points in Matlab. Detailed simulations are performed and analyzed for typical operating scenarios over 24-hour period on a real three-phase four-wire unbalanced distribution network in Perth Solar City trial, Australia. Smart meter readings are used to justify the accuracy and validation of the network model and the proposed multi-objective OPF model.

History

Volume

8

Issue

11

Start Page

1848

End Page

1859

Number of Pages

12

eISSN

1751-8695

ISSN

1751-8687

Location

UK

Publisher

IEEE

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Curtin University; School of Engineering and Technology (2013- ); TBA Research Institute;

Era Eligible

Yes

Journal

IET generation, transmission & distribution.