TY - JOUR
T1 - Autonomous Finite-Time Backstepping Control for Decentralized Economic Power Dispatch in DC Microgrids Toward Large-Signal Stability
AU - Jiang, Wentao
AU - Wang, Minghao
AU - Li, Xiangke
AU - Xu, Zhao
AU - Zhang, Xinan
AU - Wu, Xiaohua
PY - 2024/3/1
Y1 - 2024/3/1
N2 - The power electronic loads usually behave as constant power loads (CPLs) in dc microgrids (MGs), which degrades the system stability due to their high-order nonlinearity and negative impedance characteristics. Furthermore, the stability concern will be more complicated for the distributed generators (DGs) in dc MGs considering both economic efficiency and plug-and-play performance. In this article, an autonomous finite-time backstepping controller (FTBC) for decentralized economic power dispatch and precise dc-bus voltage regulation of a dc MG is proposed. The high-order nonlinear disturbance observer (HONDO) technique is adopted to estimate the power exchanges between the DGs and loads. So that the decentralized economic power dispatch and rapid voltage regulation can be achieved without any extra output current sensors. In addition, the use of HONDO improves the system's dynamic performance by estimating the disturbances and system uncertainties, and the FTBC guarantees the bus voltage tightly tracking within a finite-time convergence. A rigorous stability analysis is performed to prove the large-signal stability of the regulated system, and some simulations and experiments are carried out.
AB - The power electronic loads usually behave as constant power loads (CPLs) in dc microgrids (MGs), which degrades the system stability due to their high-order nonlinearity and negative impedance characteristics. Furthermore, the stability concern will be more complicated for the distributed generators (DGs) in dc MGs considering both economic efficiency and plug-and-play performance. In this article, an autonomous finite-time backstepping controller (FTBC) for decentralized economic power dispatch and precise dc-bus voltage regulation of a dc MG is proposed. The high-order nonlinear disturbance observer (HONDO) technique is adopted to estimate the power exchanges between the DGs and loads. So that the decentralized economic power dispatch and rapid voltage regulation can be achieved without any extra output current sensors. In addition, the use of HONDO improves the system's dynamic performance by estimating the disturbances and system uncertainties, and the FTBC guarantees the bus voltage tightly tracking within a finite-time convergence. A rigorous stability analysis is performed to prove the large-signal stability of the regulated system, and some simulations and experiments are carried out.
KW - DC microgrid (MG)
KW - decentralized control
KW - economic power dispatch
KW - finite-time backstepping control
KW - large-signal stability
UR - http://www.scopus.com/inward/record.url?scp=85153403088&partnerID=8YFLogxK
U2 - 10.1109/TIE.2023.3262880
DO - 10.1109/TIE.2023.3262880
M3 - Article
AN - SCOPUS:85153403088
SN - 0278-0046
VL - 71
SP - 2942
EP - 2954
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 3
ER -