TY - JOUR
T1 - Constant Power Load Stabilization in DC Microgrids Using Continuous-Time Model Predictive Control
AU - Alidrissi, Youssef
AU - Ouladsine, Radouane
AU - Elmouatamid, Abdellatif
AU - Errouissi, Rachid
AU - Bakhouya, Mohamed
N1 - Funding Information:
Acknowledgments: This work was supported by the HOLSYS project, which is funded by IRESEN under the program Green INNO-PROJECT (2020–2022). It is partially supported by MG-FARM project (LEAP-RE, N◦ 963530, 2022–2025), which is funded by “Ministère de l’Enseignement Supérieur, de la Recherche Scientifique et de l’Innovation, MESRSI” under the LEAP-RE program.
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/5/1
Y1 - 2022/5/1
N2 - Despite its advantages over its AC counterparts, DC microgrids present a lot of challenges. One of these challenges is the instability issues caused by constant power loads (CPLs). CPLs deteriorate the system’s performance due to their incremental negative impedance characteristics. In this paper, a DC microgrid composed of a PV/battery system feeding a pure CPL was considered. A continuous-time model predictive control combined with a disturbance observer was applied to the DC–DC bidirectional converter. The purpose of the composite controller is to address the nonlinearity of the CPL and to maintain the stability of the system in a large operating region under load and PV generation variations. To show the performance of the system, several tests were performed under PV power and CPL power variations. Simulation results show good performance in terms of transient response, optimal tracking, and stability in a large operating region.
AB - Despite its advantages over its AC counterparts, DC microgrids present a lot of challenges. One of these challenges is the instability issues caused by constant power loads (CPLs). CPLs deteriorate the system’s performance due to their incremental negative impedance characteristics. In this paper, a DC microgrid composed of a PV/battery system feeding a pure CPL was considered. A continuous-time model predictive control combined with a disturbance observer was applied to the DC–DC bidirectional converter. The purpose of the composite controller is to address the nonlinearity of the CPL and to maintain the stability of the system in a large operating region under load and PV generation variations. To show the performance of the system, several tests were performed under PV power and CPL power variations. Simulation results show good performance in terms of transient response, optimal tracking, and stability in a large operating region.
KW - bidirectional DC–DC converter
KW - constant power load
KW - DC microgrid
KW - disturbance observer
KW - model predictive control
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U2 - 10.3390/electronics11091481
DO - 10.3390/electronics11091481
M3 - Article
AN - SCOPUS:85129367940
SN - 2079-9292
VL - 11
JO - Electronics (Switzerland)
JF - Electronics (Switzerland)
IS - 9
M1 - 1481
ER -