Optimal and Decentralized Control Strategies for Inverter-Based AC Microgrids

Michael D. Cook, Eddy H. Trinklein, Gordon G. Parker, Rush D. Robinett and Wayne W. Weaver
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Michael D. Cook: Department of Mechanical Engineering, Milwaukee School of Engineering, Milwaukee, WI 53202, USA
Eddy H. Trinklein: Department of Mechanical Engineering & Engineering Mechanics, Michigan Technological University, Houghton, MI 49931, USA
Gordon G. Parker: Department of Mechanical Engineering & Engineering Mechanics, Michigan Technological University, Houghton, MI 49931, USA
Rush D. Robinett: Department of Mechanical Engineering & Engineering Mechanics, Michigan Technological University, Houghton, MI 49931, USA
Wayne W. Weaver: Department of Electrical & Computer Engineering, Michigan Technological University, Houghton, MI 49931, USA

Energies, 2019, vol. 12, issue 18, 1-20

Abstract: This paper presents two control strategies: (i) An optimal exergy destruction (OXD) controller and (ii) a decentralized power apportionment (DPA) controller. The OXD controller is an analytical, closed-loop optimal feedforward controller developed utilizing exergy analysis to minimize exergy destruction in an AC inverter microgrid. The OXD controller requires a star or fully connected topology, whereas the DPA operates with no communication among the inverters. The DPA presents a viable alternative to conventional P − ω / Q − V droop control, and does not suffer from fluctuations in bus frequency or steady-state voltage while taking advantage of distributed storage assets necessary for the high penetration of renewable sources. The performances of OXD-, DPA-, and P − ω / Q − V droop-controlled microgrids are compared by simulation.

Keywords: DC power system; AC power system; optimal control; decentralized control; distributed control; microgrid; power system 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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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