TY - JOUR
T1 - Large-Signal Stability Analysis of Modular Multilevel Converter Base on Mixed Potential Theory
AU - Yin, Hanhang
AU - Xu, Qianming
AU - Zhou, Xiaoping
AU - Huang, Xucheng
AU - Wang, Lei
AU - Shuai, Zhikang
AU - Guerrero, Josep M.
N1 - Publisher Copyright:
© 2022 CSEE Journal of Power and Energy Systems. All Rights Reserved.
PY - 2024
Y1 - 2024
N2 - Modular multilevel converter (MMC) has been widely applied in high voltage direct current (HVDC) transmission system, while its complex dynamic characteristics pose challenges for the stable operation under large-signal disturbance. In this paper, the large-signal stability of MMC is investigated under the grid voltage and power disturbances based on the mixed potential function (MPF). Firstly, a MMC simplified model based on average value model (AVM) is introduced. Then, the physical mechanism of the large-signal instability phenomenon is revealed for MMC. Based on the simplified model, the large-signal stability of MMC is analyzed by applying MPF. Furthermore, to diminish the conservatism of the MPF, a large-signal stability criterion is defined by introducing the conservative correction factor. The influences of system parameters on the large-signal stability of MMC are presented by the region of asymptotic stability (RAS). Finally, PLECS simulation case studies are carried out to verify the proposed stability criterion under the grid voltage and power disturbances.
AB - Modular multilevel converter (MMC) has been widely applied in high voltage direct current (HVDC) transmission system, while its complex dynamic characteristics pose challenges for the stable operation under large-signal disturbance. In this paper, the large-signal stability of MMC is investigated under the grid voltage and power disturbances based on the mixed potential function (MPF). Firstly, a MMC simplified model based on average value model (AVM) is introduced. Then, the physical mechanism of the large-signal instability phenomenon is revealed for MMC. Based on the simplified model, the large-signal stability of MMC is analyzed by applying MPF. Furthermore, to diminish the conservatism of the MPF, a large-signal stability criterion is defined by introducing the conservative correction factor. The influences of system parameters on the large-signal stability of MMC are presented by the region of asymptotic stability (RAS). Finally, PLECS simulation case studies are carried out to verify the proposed stability criterion under the grid voltage and power disturbances.
KW - average value model (AVM)
KW - large-signal stability
KW - mixed potential function (MPF)
KW - Modular multilevel converter (MMC)
KW - region of asymptotic stability (RAS)
UR - http://www.scopus.com/inward/record.url?scp=85146446834&partnerID=8YFLogxK
U2 - 10.17775/CSEEJPES.2021.01150
DO - 10.17775/CSEEJPES.2021.01150
M3 - Journal article
AN - SCOPUS:85146446834
SN - 2096-0042
JO - CSEE Journal of Power and Energy Systems
JF - CSEE Journal of Power and Energy Systems
ER -