Open AccessFault response comparison of LCC–MMC hybrid topologies and conventional HVDC topology
Author(s) -
Lou Boliang,
Zhou Hua,
Xu Zheng,
Wang Shijia,
Xu Yuzhe
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8828
Subject(s) - network topology , topology (electrical circuits) , computer science , fault (geology) , control theory (sociology) , engineering , electrical engineering , geology , computer network , artificial intelligence , seismology , control (management)
The modular multilevel converter (MMC) can be used to upgrade conventional line commutated converter‐based HVDC systems (LCC‐HVDC), construct the hybrid topologies of LCC and MMC to acquire better fault responses. In this study, the mechanisms of three kinds of hybrid topologies for dc fault clearance are firstly analysed. Then the fault responses of the three hybrid topologies and the conventional LCC‐HVDC topology are detailedly compared, including dc line fault and ac faults at both rectifier side and inverter side. The comparison helps demonstrate the degree of improvement when MMC is adopted to upgrade the conventional LCC‐HVDC.