Open AccessCoordinated‐control strategy of scalable superconducting magnetic energy storage under an unbalanced voltage condition
Author(s) -
Lin Xiaodong,
Lei Yong,
Fu Weizhen,
Zhu Yingwei,
Zhou Qun
Publication year - 2020
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2019.0111
Subject(s) - superconducting magnetic energy storage , modular design , scalability , computer science , energy storage , robustness (evolution) , matlab , total harmonic distortion , voltage , control theory (sociology) , dissipation , electronic engineering , engineering , electrical engineering , power (physics) , electromagnetic coil , control (management) , physics , superconducting magnet , biochemistry , chemistry , thermodynamics , quantum mechanics , database , artificial intelligence , gene , operating system
Modular multilevel converters (MMCs) have the advantages of high‐power density and small‐harmonic distortion because of their modularity and flexibility, thus providing a new avenue for research into scalable superconducting magnetic energy storage (SMES) in renewable energy generation. This study presents coordinated control for a three‐phase four‐wire (3P4W) MMC‐based SMES system under unbalanced voltage applications. First, the positive‐ and negative‐sequence mathematical models and the port‐controlled Hamiltonian with dissipation model of the 3P4W MMC‐SMES system are established by introducing an additional path for zero‐sequence current. Second, a multi‐objective passivity‐based control strategy that can effectively improve the power quality and system robustness and eliminate both double‐frequency active and reactive power fluctuations or double‐frequency active power fluctuation and negative‐sequence current is proposed. The simulation results based on MATLAB/Simulink demonstrate the effectiveness of the proposed topology of the SMES and its control strategy.