TY - JOUR
T1 - Toward Large-Signal Stabilization of Interleaved Floating Multilevel Boost Converter-Enabled High-Power DC Microgrids Supplying Constant Power Loads
AU - Li, Xiangke
AU - Wang, Minghao
AU - Jiang, Wentao
AU - Dong, Chaoyu
AU - Xu, Zhao
AU - Wu, Xiaohua
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2024/1/1
Y1 - 2024/1/1
N2 - The interleaved floating multilevel boost converter (IFMBC), featuring high step-up ratio, high power density, low operational stress, and low current/voltage ripple, is a feasible interface to adapt low-voltage high-power energy sources to dc microgrids (MGs). However, traditional control methods can hardly ensure the stability of the IFMBC-interfaced dc MGs with tightly regulated constant power loads (CPLs) of negative and nonlinear incremental impedance. Besides, parameter uncertainties of the IFMBC will further threaten the stability of the dc MG, compromising the sustainable utilization of various energy sources. In this article, a compound large-signal stabilizer, which comprises super-twisting extended state observers and backstepping controllers, is proposed to stabilize dc bus voltage for the IFMBC interfaced high-power dc MGs with CPLs. By considering CPLs and parameter uncertainties as systematic disturbances, super-twisting ESOs can estimate the disturbances effectively during fast transients. By feeding forward the estimations, backstepping controllers are designed to accurately regulate the dc bus voltage. The large-signal stability of the dc MG is modeled and the respective results are justified by applying the Lyapunov's theorem. Simulations and experiments are performed to verify the efficacy of the proposed stabilizer.
AB - The interleaved floating multilevel boost converter (IFMBC), featuring high step-up ratio, high power density, low operational stress, and low current/voltage ripple, is a feasible interface to adapt low-voltage high-power energy sources to dc microgrids (MGs). However, traditional control methods can hardly ensure the stability of the IFMBC-interfaced dc MGs with tightly regulated constant power loads (CPLs) of negative and nonlinear incremental impedance. Besides, parameter uncertainties of the IFMBC will further threaten the stability of the dc MG, compromising the sustainable utilization of various energy sources. In this article, a compound large-signal stabilizer, which comprises super-twisting extended state observers and backstepping controllers, is proposed to stabilize dc bus voltage for the IFMBC interfaced high-power dc MGs with CPLs. By considering CPLs and parameter uncertainties as systematic disturbances, super-twisting ESOs can estimate the disturbances effectively during fast transients. By feeding forward the estimations, backstepping controllers are designed to accurately regulate the dc bus voltage. The large-signal stability of the dc MG is modeled and the respective results are justified by applying the Lyapunov's theorem. Simulations and experiments are performed to verify the efficacy of the proposed stabilizer.
KW - Backstepping control
KW - constant power load (CPL)
KW - interleaved floating multilevel boost converter (IFMBC)
KW - large-signal stability
KW - super-twisting extended state observer (ESO)
UR - http://www.scopus.com/inward/record.url?scp=85149400604&partnerID=8YFLogxK
U2 - 10.1109/TIE.2023.3243274
DO - 10.1109/TIE.2023.3243274
M3 - 文章
AN - SCOPUS:85149400604
SN - 0278-0046
VL - 71
SP - 857
EP - 869
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 1
ER -