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Open AccessArticle

A Novel, Stable, and Economic Power Sharing Scheme for an Autonomous Microgrid in the Energy Internet

1
School of Electrical Engineering, Wuhan University, Wuhan 430072, China
2
Department of Electrical Engineering and Computer Science, the University of Tennessee, Knoxville, TN 37996, USA
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Author to whom correspondence should be addressed.
Academic Editor: G.J.M. (Gerard) Smit
Energies 2015, 8(11), 12741-12764; https://doi.org/10.3390/en81112338
Received: 16 September 2015 / Revised: 2 November 2015 / Accepted: 4 November 2015 / Published: 11 November 2015
(This article belongs to the Special Issue Decentralized Management of Energy Streams in Smart Grids)
With a higher penetration of distributed generation in the power system, the application of microgrids is expected to increase dramatically in the future. This paper proposes a novel method to design optimal droop coefficients of dispatchable distributed energy resources for a microgrid in the Energy Internet considering the volatility of renewable energy generation, such as wind and photovoltaics. The uncertainties of renewable energy generation are modeled by a limited number of scenarios with high probabilities. In order to achieve stable and economical operation of a microgrid that is also suitable for plug-and-play distributed renewable energy and distributed energy storage devices, a multi-objective optimization model of droop coefficients compromising between operational cost and the integral of time-weighted absolute error criterion is developed. The optimization is solved by using a differential evolution algorithm. Case studies demonstrate that the economy and transient behavior of microgrids in the Energy Internet can both be improved significantly using the proposed method. View Full-Text
Keywords: microgrid; energy internet; plug-and-play; multi-objective optimization; integral of time-weighted absolute error microgrid; energy internet; plug-and-play; multi-objective optimization; integral of time-weighted absolute error
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Yan, B.; Wang, B.; Zhu, L.; Liu, H.; Liu, Y.; Ji, X.; Liu, D. A Novel, Stable, and Economic Power Sharing Scheme for an Autonomous Microgrid in the Energy Internet. Energies 2015, 8, 12741-12764.

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