TY - GEN
T1 - Improving the System Dynamic Stability of MMCs by Insertion Indices Compensation with Capacitor Voltages Feedforward
AU - Xiong, Xiaoling
AU - Yang, Yuchen
AU - Wang, Xiongfei
AU - Blaabjerg, Frede
AU - Zhao, Chengyong
N1 - Funding Information:
This work is supported by the National Natural Science Foundation of China under Grant 51707065.
Publisher Copyright:
© 2020 IEEE.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020/11/29
Y1 - 2020/11/29
N2 - Due to the significant coupling impacts of the internal multiharmonic dynamics on the ac terminal in a modular multilevel converter (MMC), its terminal characteristics is quite different from a two-level voltage-source converters (VSCs). Thus the complex modeling methods, e.g. the harmonic state-space modeling approach, are required to analyze the stability of MMC-based system. In this paper, the internal dynamics of MMCs are decoupled in the differential-mode (DM) circuit using insertion indices compensating method by feedforwarding the capacitor voltage. Therefore, the ac-side characteristics is the same as that of the two-level VSCs, and the stability and controller parameters can be design-oriented by the simple averaged small-signal model.
AB - Due to the significant coupling impacts of the internal multiharmonic dynamics on the ac terminal in a modular multilevel converter (MMC), its terminal characteristics is quite different from a two-level voltage-source converters (VSCs). Thus the complex modeling methods, e.g. the harmonic state-space modeling approach, are required to analyze the stability of MMC-based system. In this paper, the internal dynamics of MMCs are decoupled in the differential-mode (DM) circuit using insertion indices compensating method by feedforwarding the capacitor voltage. Therefore, the ac-side characteristics is the same as that of the two-level VSCs, and the stability and controller parameters can be design-oriented by the simple averaged small-signal model.
KW - capacitor voltage feedforward
KW - insertion indices compensation
KW - internal dynamics coupling
KW - Modular multilevel converter (MMC)
KW - stability
UR - http://www.scopus.com/inward/record.url?scp=85103148730&partnerID=8YFLogxK
U2 - 10.1109/IPEMC-ECCEAsia48364.2020.9367815
DO - 10.1109/IPEMC-ECCEAsia48364.2020.9367815
M3 - Article in proceeding
AN - SCOPUS:85103148730
T3 - 2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
SP - 892
EP - 897
BT - 2020 IEEE 9th International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
PB - IEEE (Institute of Electrical and Electronics Engineers)
T2 - 9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
Y2 - 29 November 2020 through 2 December 2020
ER -