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

Li Yu, Di Shi, Guangyue Xu, Xiaobin Guo, Zhen Jiang and Chaoyang Jing
Additional contact information
Li Yu: China Southern Power Grid EPRI, 11 Kexiang Rd, Guangzhou 510663, China
Di Shi: eMIT, LLC., 125 N Lake Ave., Pasadena, CA 91101, USA
Guangyue Xu: eMIT, LLC., 125 N Lake Ave., Pasadena, CA 91101, USA
Xiaobin Guo: China Southern Power Grid EPRI, 11 Kexiang Rd, Guangzhou 510663, China
Zhen Jiang: China Southern Power Grid EPRI, 11 Kexiang Rd, Guangzhou 510663, China
Chaoyang Jing: eMIT, LLC., 125 N Lake Ave., Pasadena, CA 91101, USA

Energies, 2018, vol. 11, issue 10, 1-17

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.

Keywords: distributed generation (DG); microgrid; reactive power sharing; droop control; consensus control; secondary control (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: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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