TY - JOUR
T1 - Toward Large-Signal Stabilization of Floating Dual Boost Converter-Powered DC Microgrids Feeding Constant Power Loads
AU - Lin, Pengfeng
AU - Jiang, Wentao
AU - Wang, Jinyu
AU - Shi, Donghan
AU - Zhang, Chuanlin
AU - Wang, Peng
N1 - Publisher Copyright:
© 2013 IEEE.
PY - 2021/2
Y1 - 2021/2
N2 - In modern dc microgrids (MGs), floating dual boost converters (FDBCs) take the advantages of both interleaved modulations and higher voltage gains, and the FDBC topology has been shown rather suitable for high-power applications. For a given dc MG, those power electronic loads and motor drives would behave as constant power loads (CPLs) that have negative incremental input impedances causing serious stability issues. To make the FDBC-enabled dc MG more adaptable to the increasing penetration of CPLs, this article proposes a compound stabilizer that is capable to stabilize all states in the converter in the large-signal sense. The stabilizer is synthesized by nonlinear disturbance observers and a recursive backstepping controller. The observers provide disturbance estimations to the controller, which neutralizes the disturbances in a feedforward manner and also guarantees the large-signal stabilization of MG under Lyapunov theorems. Practical parameter identification procedures are provided, and it is shown that the proposed stabilizer contributes the wider stability margin to the FDBC than the commonly used proportional-integral (PI) control. Finally, hardware experimentations substantiate the effectiveness and feasibility of the large-signal stabilizer.
AB - In modern dc microgrids (MGs), floating dual boost converters (FDBCs) take the advantages of both interleaved modulations and higher voltage gains, and the FDBC topology has been shown rather suitable for high-power applications. For a given dc MG, those power electronic loads and motor drives would behave as constant power loads (CPLs) that have negative incremental input impedances causing serious stability issues. To make the FDBC-enabled dc MG more adaptable to the increasing penetration of CPLs, this article proposes a compound stabilizer that is capable to stabilize all states in the converter in the large-signal sense. The stabilizer is synthesized by nonlinear disturbance observers and a recursive backstepping controller. The observers provide disturbance estimations to the controller, which neutralizes the disturbances in a feedforward manner and also guarantees the large-signal stabilization of MG under Lyapunov theorems. Practical parameter identification procedures are provided, and it is shown that the proposed stabilizer contributes the wider stability margin to the FDBC than the commonly used proportional-integral (PI) control. Finally, hardware experimentations substantiate the effectiveness and feasibility of the large-signal stabilizer.
KW - Compound stabilizer
KW - dc power system
KW - floating dual boost converter (FDBC)
KW - large-signal stabilization
KW - nonlinear disturbance observer
UR - http://www.scopus.com/inward/record.url?scp=85076042317&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2019.2956097
DO - 10.1109/JESTPE.2019.2956097
M3 - 文章
AN - SCOPUS:85076042317
SN - 2168-6777
VL - 9
SP - 580
EP - 589
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 1
M1 - 8913535
ER -