Electromechanical transient modelling and application of modular multilevel converter with embedded energy storage | Zendy

Yu Zheyang | Zendy; Zhang Zheren | Zendy; Xu Zheng | Zendy

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Electromechanical 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) - modular design , transient (computer programming) , energy storage , computer science , transient analysis , electronic engineering , electrical engineering , engineering , transient response , physics , operating system , power (physics) , quantum mechanics

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.

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