A novel decentralized economic operation in islanded AC microgrids

Hua Han; Lang Li; Lina Wang; Mei Su; Yue Zhao; Josep M. Guerrero

doi:10.3390/en10060804

A novel decentralized economic operation in islanded AC microgrids

Hua Han, Lang Li, Lina Wang^*, Mei Su, Yue Zhao, Josep M. Guerrero

^*Corresponding author for this work

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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.

Original language	English
Article number	804
Journal	Energies
Volume	10
Issue number	6
Number of pages	18
ISSN	1996-1073
DOIs	https://doi.org/10.3390/en10060804
Publication status	Published - 1 Jun 2017

Keywords

Droop control
Economic operation
Microgrids (MGs)
Nonlinear droop

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10.3390/en10060804

Open access articleFinal published version, 7.74 MBLicence: CC BY 4.0

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AU - Han, Hua

AU - Li, Lang

AU - Wang, Lina

AU - Su, Mei

AU - Zhao, Yue

AU - Guerrero, Josep M.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - 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.

AB - 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.

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A novel decentralized economic operation in islanded AC microgrids

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