Optimal Distributed Control for Secondary Frequency and Voltage Regulation in an Islanded Microgrid

This paper proposes an optimal distributed control strategy for the coordination of multiple distributed generators in an islanded microgrid (MG). A finite-time secondary frequency control approach is developed to eliminate the frequency deviation and maintain accurate active power sharing in a fini...

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Bibliographic Details
Published in:IEEE transactions on industrial informatics Vol. 15; no. 1; pp. 225 - 235
Main Authors: Xu, Yinliang, Sun, Hongbin, Gu, Wei, Xu, Yan, Li, Zhengshuo
Format: Journal Article
Language:English
Published: Piscataway IEEE 01.01.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Average voltage regulation
Communication networks
Control systems
Convergence
Decentralized control
Distributed generation
Electric potential
finite-time convergence
Frequency control
Frequency deviation
Generators
islanded microgrid (MG)
Microgrids
optimal distributed control
Reactive power
secondary control
Strategy
Voltage control
ISSN:1551-3203, 1941-0050
Online Access:Get full text
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Summary:This paper proposes an optimal distributed control strategy for the coordination of multiple distributed generators in an islanded microgrid (MG). A finite-time secondary frequency control approach is developed to eliminate the frequency deviation and maintain accurate active power sharing in a finite-time manner. It is demonstrated that the traditional distributed control approach with asymptotical convergence is just a special case of the proposed finite-time control strategy under the specific control parameter settings. Then, a secondary voltage control approach is presented to regulate the average voltage magnitude of all distributed generators to the desired value and achieve accurate reactive power sharing. The implementation of the proposed distributed control strategy only requires information exchange among neighboring local controllers through a sparse communication network. Simulations with an islanded MG testbed built in MATLAB/Simulink are conducted to validate the effectiveness of the proposed distributed control strategy.
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ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2018.2795584