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Energies 2017, 10(6), 804; doi:10.3390/en10060804

A Novel Decentralized Economic Operation in Islanded AC Microgrids

1
School of Information Science and Engineering, Central South University, Changsha 410083, China
2
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
3
Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
4
Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: II-Yop Chung
Received: 16 April 2017 / Revised: 27 May 2017 / Accepted: 9 June 2017 / Published: 13 June 2017
(This article belongs to the Special Issue Advanced Operation and Control of Smart Microgrids)
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Abstract

Droop schemes are usually applied to the control of distributed generators (DGs) in microgrids (MGs) to realize proportional power sharing. The objective might, however, not suit MGs well for economic reasons. Addressing that issue, this paper proposes an alternative droop scheme for reducing the total active generation costs (TAGC). Optimal economic operation, DGs’ capacity limitations and system stability are fully considered basing on DGs’ generation costs. The proposed scheme utilizes the frequency as a carrier to realize the decentralized economic operation of MGs without communication links. Moreover, a fitting method is applied to balance DGs’ synchronous operation and economy. The effectiveness and performance of the proposed scheme are verified through simulations and experiments. View Full-Text
Keywords: droop control; economic operation; microgrids (MGs); nonlinear droop droop control; economic operation; microgrids (MGs); nonlinear droop
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Han, H.; Li, L.; Wang, L.; Su, M.; Zhao, Y.; Guerrero, J.M. A Novel Decentralized Economic Operation in Islanded AC Microgrids. Energies 2017, 10, 804.

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