TY - GEN
T1 - Protection System of Multi-Terminal MMC-based HVDC Grids
T2 - 2022 International Conference on Power Energy Systems and Applications, ICoPESA 2022
AU - Niaki, Seyed Hassan Ashrafi
AU - Liu, Zhou
AU - Chen, Zhe
AU - Bak-Jensen, Birgitte
AU - Hu, Shuju
PY - 2022/2/25
Y1 - 2022/2/25
N2 - Fast development of High Voltage Direct Current (HVDC) technology has been remarkable over the past decades. Multi-terminal HVDC grids based on Voltage Source Converters (VSC) are promising solution to connect multiple asynchronous power grids, as well as integrate large-scale renewable energy sources e.g. offshore wind farms. New generation of the VSCs, Modular Multilevel Converter (MMC), offers considerable benefits. However, protection has always been a great challenge for the VSC-HVDC transmission systems, in particular, for the multi-terminal DC grids. This paper presents an insightful survey considering protection strategies for MMC-HVDC grids. The study sheds light on state-of-the-art of protection scheme including fault identification and interruption methods for the MMC-HVDC systems. Moreover, a short discussion regarding HVDC grid topologies and control has been presented to investigate their impacts on protection and security of the VSC-HVDC grids. Investigation of Fault-Ride-Through (FRT) capability is vital to be included in protection coordination strategies under DC fault conditions. Possibility of having different DC FRT capabilities for different structures of the MMCs is investigated. In addition, pros and cons of protection strategies are presented and discussed comprehensively.
AB - Fast development of High Voltage Direct Current (HVDC) technology has been remarkable over the past decades. Multi-terminal HVDC grids based on Voltage Source Converters (VSC) are promising solution to connect multiple asynchronous power grids, as well as integrate large-scale renewable energy sources e.g. offshore wind farms. New generation of the VSCs, Modular Multilevel Converter (MMC), offers considerable benefits. However, protection has always been a great challenge for the VSC-HVDC transmission systems, in particular, for the multi-terminal DC grids. This paper presents an insightful survey considering protection strategies for MMC-HVDC grids. The study sheds light on state-of-the-art of protection scheme including fault identification and interruption methods for the MMC-HVDC systems. Moreover, a short discussion regarding HVDC grid topologies and control has been presented to investigate their impacts on protection and security of the VSC-HVDC grids. Investigation of Fault-Ride-Through (FRT) capability is vital to be included in protection coordination strategies under DC fault conditions. Possibility of having different DC FRT capabilities for different structures of the MMCs is investigated. In addition, pros and cons of protection strategies are presented and discussed comprehensively.
KW - MMC converter
KW - DC circuit breakers
KW - DC fault-ride-through (FRT)
KW - fault interruption
KW - fault identification
KW - multi-terminal HVDC systems
KW - voltage source converter (VSC)
KW - HVDC protection
UR - http://www.scopus.com/inward/record.url?scp=85129294333&partnerID=8YFLogxK
U2 - 10.1109/ICoPESA54515.2022.9754409
DO - 10.1109/ICoPESA54515.2022.9754409
M3 - Article in proceeding
SN - 978-1-6654-1098-4
SP - 167
EP - 177
BT - 2022 International Conference on Power Energy Systems and Applications (ICoPESA)
PB - IEEE (Institute of Electrical and Electronics Engineers)
Y2 - 25 February 2022 through 27 February 2022
ER -