Open AccessInteraction between damping characteristics and the initial‐stage short‐circuit current of MMC‐HVDC transmission systems
Author(s) -
Qin Boyu,
Liu Wansong,
Zhou Xingyue,
Ding Tao,
Li Wei,
Zomaya Albert Y.
Publication year - 2021
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/pel2.12154
Subject(s) - transmission system , control theory (sociology) , high voltage direct current , short circuit ratio , current (fluid) , direct current , nonlinear system , transmission (telecommunications) , modular design , equivalent circuit , voltage , short circuit , engineering , electronic engineering , computer science , physics , electrical engineering , led circuit , control (management) , quantum mechanics , artificial intelligence , operating system
This paper studies the interaction between the damping characteristics and the initial‐stage short‐circuit current of modular multilevel converter based high voltage direct current (MMC‐HVDC) transmission system. First, the MMCs' input–output characteristics are obtained through the operator approach, and the influences of both linear part and nonlinear part are analysed. Second, an input–output characteristics based short‐circuit current calculation method is proposed. Third, an eigenvalue‐based comprehensive index is proposed to evaluate the damping characteristics of the MMC‐HVDC transmission system. Finally, the interaction between the damping characteristics and the initial‐stage DC short‐circuit current is analysed under different system parameters and DC system structures. The analysis results show that there is a negative correlation between the system damping characteristics and the average rising rate of the short‐circuit current. The proposed index G can effectively evaluate the short‐circuit current of MMC‐HVDC and can provide guidance for the planning of DC system structure, the selection of operation mode and system parameters.