TY - JOUR
T1 - A robust autonomous sliding-mode control of renewable DC microgrids for decentralized power sharing considering large-signal stability
AU - Li, Xiangke
AU - Wang, Minghao
AU - Dong, Chaoyu
AU - Jiang, Wentao
AU - Xu, Zhao
AU - Wu, Xiaohua
AU - Jia, Hongjie
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grant 52207224, and Grant 62101473, in part by the GuangdongBasic and Applied Basic Research Fund under Grant 2023A1515010653, and in part by the Foundation of the Hong Kong Polytechnic University under Grant 1-YY4M, and Grant 1-YY4T.
Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grant 52207224 , and Grant 62101473 , in part by the Guangdong Basic and Applied Basic Research Fund under Grant 2023A1515010653 , and in part by the Foundation of the Hong Kong Polytechnic University under Grant 1-YY4M , and Grant 1-YY4T .
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/6/1
Y1 - 2023/6/1
N2 - DC microgrids (MGs) are providing a pathway toward a zero-carbon-based future. The intermittent renewable energy sources (RESs) and non-linear constant power loads (CPLs) thrive in DC MGs, craving for effective coordinative control solutions to ensure the stability of DC MGs. In this paper, a robust autonomous sliding mode control (SMC) scheme is proposed for achieving a globally stable and decentralized power sharing operation of multiple dispatchable units (DUs) in CPL-integrated DC MGs. Firstly, by using the high-order finite-time observer (HOFTO) technique, the disturbances, such as the power coupling and parameter uncertainties between different DU-interfaced converters, are self-eliminated within a finite time without any output current sensor and communication link. Secondly, a decentralized control scheme synthesizing the robust SMC and droop control algorithm is proposed to achieve proportional power sharing among paralleled DUs and precise DC bus voltage regulation. The proposed control guarantees the global system's large-signal stability by ensuring the local stability of an individual converter, offering a simple yet effective stable coordinative solution. Finally, simulation and experimental results verify the effectiveness of the proposed strategy.
AB - DC microgrids (MGs) are providing a pathway toward a zero-carbon-based future. The intermittent renewable energy sources (RESs) and non-linear constant power loads (CPLs) thrive in DC MGs, craving for effective coordinative control solutions to ensure the stability of DC MGs. In this paper, a robust autonomous sliding mode control (SMC) scheme is proposed for achieving a globally stable and decentralized power sharing operation of multiple dispatchable units (DUs) in CPL-integrated DC MGs. Firstly, by using the high-order finite-time observer (HOFTO) technique, the disturbances, such as the power coupling and parameter uncertainties between different DU-interfaced converters, are self-eliminated within a finite time without any output current sensor and communication link. Secondly, a decentralized control scheme synthesizing the robust SMC and droop control algorithm is proposed to achieve proportional power sharing among paralleled DUs and precise DC bus voltage regulation. The proposed control guarantees the global system's large-signal stability by ensuring the local stability of an individual converter, offering a simple yet effective stable coordinative solution. Finally, simulation and experimental results verify the effectiveness of the proposed strategy.
KW - Decentralized power sharing
KW - High-order finite-time observer
KW - Large-signal stability
KW - Renewable DC microgrid
KW - Robust sliding-mode control
UR - http://www.scopus.com/inward/record.url?scp=85151289038&partnerID=8YFLogxK
U2 - 10.1016/j.apenergy.2023.121019
DO - 10.1016/j.apenergy.2023.121019
M3 - Journal article
AN - SCOPUS:85151289038
SN - 0306-2619
VL - 339
JO - Applied Energy
JF - Applied Energy
M1 - 121019
ER -