Open AccessComprehensive inertia control for hybrid AC/DC distribution system
Author(s) -
He Li,
Li Yong,
Wen Ming,
Cao Yijia,
Shi Jingrong
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8663
Subject(s) - inertia , control theory (sociology) , computer science , robustness (evolution) , turbine , wind power , electric power system , power (physics) , control engineering , control (management) , engineering , electrical engineering , physics , mechanical engineering , chemistry , classical mechanics , quantum mechanics , artificial intelligence , gene , biochemistry
In this study, a comprehensive inertia control strategy is proposed for the distribution system consisting of AC/DC sub‐grids. The coupling relationship of the AC and DC systems is analysed, and the comprehensive inertia control method of hybrid AC/DC system is proposed. More specifically, the operational characteristics of the wind turbine generator (WTG) are utilised to design the virtual inertial response strategy, which enables the WTGs in distribution network to provide flexible voltage and frequency support. Further, since the distributed energy storage (DES) is taken into account, the virtual inertial response of WTGs can be more controllable, which fully utilises the capacity of DES without the risk of halt of the WTGs. In addition, the mutual power support is designed based on the coupling relationship of the hybrid system, which can enhance the overall inertia of the distribution network. Finally, the effectiveness of the proposed strategy is verified by the simulation studies, which shows that the strategy can enhance the power quality and dynamics of the hybrid AC/DC system and thus improves the robustness of the distribution network.