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Voltage Source Operation of the Energy-Router Based on Model Predictive Control

1
Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
2
Department of Electronics, Universidad Andrés Bello (UNAB), Santiago 8320000, Chile
*
Author to whom correspondence should be addressed.
Energies 2019, 12(10), 1892; https://doi.org/10.3390/en12101892
Received: 8 April 2019 / Revised: 6 May 2019 / Accepted: 12 May 2019 / Published: 17 May 2019
(This article belongs to the Special Issue Power Electronic Systems for Efficient and Sustainable Energy Supply)
PDF [1942 KB, uploaded 17 May 2019]

Abstract

The energy router (ER) is regarded as a key component of microgrids. It is a converter that interfaces the microgrid(s) with the utility grid. The energy router has a multiport structure and bidirectional energy flow control. The energy router concept can be implemented in nearly zero energy buildings (NZEB) to provide flexible energy management. We propose a concept where ER is working as a single gridforming converter with a predefined voltage reference. The biggest challenge is to maintain regulated voltage and frequency inside the NZEB in the idle operation mode, where traditional regulators, e.g., proportional-resonant (PR), proportional-integral-derivative (PID), will not meet the control design requirements and could have unstable behavior. To gain the stability of the system, we propose model predictive control (MPC). The design of the MPC algorithm is explained. A simulation software for power electronics (PLECS) is used to simulate the proposed algorithm. Finally, the simulation results are verified on an experimental prototype.
Keywords: energy router; model predictive control; voltage source inverter; idle mode; nearly zero energy building energy router; model predictive control; voltage source inverter; idle mode; nearly zero energy building
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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MDPI and ACS Style

Roasto, I.; Husev, O.; Najafzadeh, M.; Jalakas, T.; Rodriguez, J. Voltage Source Operation of the Energy-Router Based on Model Predictive Control. Energies 2019, 12, 1892.

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