Open AccessElectromechanical transient modelling and application of modular multilevel converter with embedded energy storage
Author(s) -
Yu Zheyang,
Zhang Zheren,
Xu Zheng
Publication year - 2022
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/gtd2.12282
Subject(s) - transient (computer programming) , modular design , energy storage , rotor (electric) , control theory (sociology) , fault (geology) , electronic engineering , computer science , engineering , stability (learning theory) , control engineering , electrical engineering , control (management) , physics , power (physics) , quantum mechanics , artificial intelligence , machine learning , seismology , geology , operating system
This paper studies the electromechanical transient modelling techniques of the modified modular multilevel converter (MMC), named active MMC, which is equipped with embedded energy storage in submodules. Firstly, the mathematical model of the active MMC and its equivalent circuits at the AC and DC sides are established. Then, the control scheme of active MMC that focus on the cooperation of the MMC converter and the energy storage submodules is illustrated. The proposed electromechanical transient model are implemented on PSS/E and compared with the electromagnetic transient model on PSCAD in a two terminal active MMC sytem; the results of the active MMC system under AC and DC fault prove the validity of the proposed model. Lastly, stability studies of the practical system are carried out, and the simulation results prove the improvement by the application of the active MMC on the rotor angle stability and frequency stability.