A Novel Decentralized Economic Operation in Islanded AC Microgrids

Hua Han, Lang Li, Lina Wang, Mei Su, Yue Zhao and Josep M. Guerrero
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Hua Han: School of Information Science and Engineering, Central South University, Changsha 410083, China
Lang Li: School of Information Science and Engineering, Central South University, Changsha 410083, China
Lina Wang: School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
Mei Su: School of Information Science and Engineering, Central South University, Changsha 410083, China
Yue Zhao: Department of Electrical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
Josep M. Guerrero: Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark

Energies, 2017, vol. 10, issue 6, 1-18

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.

Keywords: droop control; economic operation; microgrids (MGs); nonlinear droop (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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