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Article

Multi-Objective Decentralized Model Predictive Control for Inverter Air Conditioner Control of Indoor Temperature and Frequency Stabilization in Microgrid

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Department of Electrical Engineering, School of Engineering, University of Phayao, Phayao 56000, Thailand
2
Department of Industrial Engineering, School of Engineering, University of Phayao, Phayao 56000, Thailand
3
Department of Electrical Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
*
Author to whom correspondence should be addressed.
Academic Editors: Andrea Bonfiglio and Andrea Mazza
Energies 2021, 14(21), 6969; https://doi.org/10.3390/en14216969
Received: 29 September 2021 / Revised: 16 October 2021 / Accepted: 20 October 2021 / Published: 23 October 2021
(This article belongs to the Topic Power System Modeling and Control)
Microgrid (MG) is a novel concept for a future distribution power system that enables renewable energy sources (RES). The intermittent RES, such as wind turbines and photovoltaic generators, can be connected to the MG via a power electronics inverter. However, the inverter interfaced RESs reduce the total inertia and damping properties of the traditional MG. Consequently, the system exhibits steeper frequency nadir and the rate of change of frequency (RoCoF), which may degrade the dynamic performance and cause the severe frequency fluctuation of the system. Smart loads such as inverter air conditioners (IACs) tend to be used for ancillary services in power systems. The power consumption of IACs can be regulated to suppress frequency fluctuation. Nevertheless, these IACs, regulating power, can cause the deviation of indoor temperature from the temperature setting. The variation in indoor temperature should be controlled to fulfill residential comfort. This paper proposes a multi-objective decentralized model predictive control (DMPC) for controlling the power consumption of IACs to reduce MG frequency fluctuation and control the variation in indoor temperature. Simulation results on the studied microgrid with the high penetration of wind and photovoltaic generator demonstrate that the proposed DMPC is able to regulate frequency deviation and control indoor temperature deviation as a user preference. In addition, the DMPC has a superior performance effect to the proportional-integral (PI) controller in terms of reducing frequency deviation, satisfying indoor temperature preferences, and being robust to the varying numbers of IACs. View Full-Text
Keywords: load frequency control; inverter air conditioner; decentralized model predictive control; microgrid; smart load load frequency control; inverter air conditioner; decentralized model predictive control; microgrid; smart load
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MDPI and ACS Style

Pahasa, J.; Potejana, P.; Ngamroo, I. Multi-Objective Decentralized Model Predictive Control for Inverter Air Conditioner Control of Indoor Temperature and Frequency Stabilization in Microgrid. Energies 2021, 14, 6969. https://doi.org/10.3390/en14216969

AMA Style

Pahasa J, Potejana P, Ngamroo I. Multi-Objective Decentralized Model Predictive Control for Inverter Air Conditioner Control of Indoor Temperature and Frequency Stabilization in Microgrid. Energies. 2021; 14(21):6969. https://doi.org/10.3390/en14216969

Chicago/Turabian Style

Pahasa, Jonglak, Potejanasak Potejana, and Issarachai Ngamroo. 2021. "Multi-Objective Decentralized Model Predictive Control for Inverter Air Conditioner Control of Indoor Temperature and Frequency Stabilization in Microgrid" Energies 14, no. 21: 6969. https://doi.org/10.3390/en14216969

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