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Title: An optimal secondary multi-bus voltage and reactive power sharing control based on non-iterative decoupled linearized power flow for islanded microgrids
Authors: Wong, Cassandra Yi Chyn
Lim, Chee Shen
Goh, Hui Hwang
Cruden, Andrew
Rotaru, Mihai Dragos
Kong, Xin
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Wong, C. Y. C., Lim, C. S., Goh, H. H., Cruden, A., Rotaru, M. D. & Kong, X. (2021). An optimal secondary multi-bus voltage and reactive power sharing control based on non-iterative decoupled linearized power flow for islanded microgrids. IEEE Access, 9, 105242-105254.
Journal: IEEE Access 
Abstract: The subject of optimal secondary control of power-electronic-interfaced distributed energy resources (DERs) in droop-controlled microgrids has garnered significant research attention in recent years. While the feasibility of optimal secondary control based on non-linear power flow has been proven, the power flow algorithm is essentially iterative in nature. This work proposes an optimal secondary control with non-iterative power flow to regulate multi-bus voltages and DERs' reactive powers. The control scheme incorporates a modified Decoupled Linearized Power Flow that is known to be superior in terms of reactive power and bus voltage magnitude estimation, as compared to classical DC power flow, into a constrained quadratic programming. Q-V droop is integrated into the linear power flow in place of the slack bus. The proposed optimal scheme is provably accurate for maintaining reactive power sharing while regulating multiple load-bus voltages. The additional degrees of freedom enabled by the weighting factors significantly improve the control flexibility of the secondary controller. The allowable bus voltages and DER kVar capacity limits have also been considered by the control algorithm. The work is proven through an accurate co-simulation study comprising an 18-bus network and a full primary control models in PowerFactory, interfaced through industrial communication tool MatrikonOPC.
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2021.3099432
Rights: © 2021 IEEE. This journal is 100% open access, which means that all content is freely available without charge to users or their institutions. All articles accepted after 12 June 2019 are published under a CC BY 4.0 license, and the author retains copyright. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, as long as proper attribution is given.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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