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Energies 2018, 11(10), 2710; https://doi.org/10.3390/en11102710

Consensus Control of Distributed Energy Resources in a Multi-Bus Microgrid for Reactive Power Sharing and Voltage Control

1
China Southern Power Grid EPRI, 11 Kexiang Rd, Guangzhou 510663, China
2
eMIT, LLC., 125 N Lake Ave., Pasadena, CA 91101, USA
*
Author to whom correspondence should be addressed.
Received: 1 August 2018 / Revised: 20 September 2018 / Accepted: 26 September 2018 / Published: 11 October 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

The hierarchical control architecture, including layers of primary, secondary and tertiary controls, is becoming the standard operating paradigm for microgrids (MGs). Two major factors that limit the adoption of existing hierarchical control in microgrid are the low accuracy in reactive power sharing and the requirement for complex communication infrastructure. This paper addresses this problem by proposing a novel distributed primary and secondary control for distributed generators dispersed in a multi-bus microgrid. The proposed method realizes voltage control and accurate reactive power sharing in a distributed manner using minimum communication. Each distributed generator only needs its own information and minimum information from its neighboring units. Topology of the network can be flexible which supports the plug-and-play feature of microgrids. In a distribution system, high R/X ratio and system imbalance can no longer be neglected and thus the sequence component analysis and virtual impedance are implemented in the proposed control framework. The proposed framework is validated by simulation results on a MG testbed modified from the IEEE 13-bus distribution system. View Full-Text
Keywords: distributed generation (DG); microgrid; reactive power sharing; droop control; consensus control; secondary control distributed generation (DG); microgrid; reactive power sharing; droop control; consensus control; secondary control
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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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Yu, L.; Shi, D.; Xu, G.; Guo, X.; Jiang, Z.; Jing, C. Consensus Control of Distributed Energy Resources in a Multi-Bus Microgrid for Reactive Power Sharing and Voltage Control. Energies 2018, 11, 2710.

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