Distributed Secondary Control in Microgrids Using Synchronous Condenser for Voltage and Frequency Support

Tung Lam Nguyen, Ha Thi Nguyen, Yu Wang, Osama A. Mohammed and Emmanouil Anagnostou
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Tung Lam Nguyen: Department of Electrical and Computer Engineering, Florida International University, Miami, FL 33174, USA
Ha Thi Nguyen: Department of Electrical Engineering, The University of Danang-University of Science and Technology, Danang 550000, Vietnam
Yu Wang: Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, UK
Osama A. Mohammed: Department of Electrical and Computer Engineering, Florida International University, Miami, FL 33174, USA
Emmanouil Anagnostou: Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06268, USA

Energies, 2022, vol. 15, issue 8, 1-15

Abstract: A high share of distributed energy resources (DERs) in power distribution grids has posed many challenges for system operation and control. Microgrid (MG) application with different distributed control approaches for DERs has been drawn a lot of attention from the research community to provide more flexibility, reliability and resilience for the system. This paper develops a distributed secondary control for DERs in MGs and on top of that using synchronous condenser (SC) participating in the secondary control for voltage support. The proposed distributed secondary control framework of MGs is designed to obtain four objectives as follows: (i) frequency restoration, (ii) average voltage restoration, (iii) arbitrary active power sharing among SGs and BESSs and (iv) arbitrary reactive power sharing among all SGs, BESSs and SCs. The comparison results under different scenarios show that with SC participating in the distributed secondary control in MGs, the system frequency and voltage response are much improved and quickly recovered to the nominal values thanks to the natural inertia response and fast reactive power control of SC sharing with other DERs in the MGs. Additionally, a multi-agent system is implemented to realize the proposed control method in hardware environment.

Keywords: microgrids; distributed control; synchronous condenser; distributed energy resources; 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: 2022
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