TY - JOUR
T1 - DC protection coordination for multi-terminal HB-MMC-based HVDC grids
AU - Niaki, Seyed Hassan Ashrafi
AU - Chen, Zhe
AU - Bak-Jensen, Birgitte
AU - Sharifabadi, Kamran
AU - Liu, Zhou
AU - Hu, Shuju
PY - 2024/2/3
Y1 - 2024/2/3
N2 - Fast progress of High Voltage Direct Current (HVDC) technology has been considerable over the past decades. Emerging Modular Multilevel Converter (MMC) provides power systems with promising solutions to integrate large-scale renewable energy sources, as well as multiple asynchronous power grids. Consequently, implementation of a multi-terminal HVDC transmission system has been easier using MMC converters. However, protection of multi-terminal MMC-based HVDC grids under DC fault conditions is a challenge for the industry. This study sheds light on concept of system-level DC protection coordination for multi-terminal HVDC grids. Although, there are different protection methods for HVDC transmission systems including multi-terminal ones, there are no well-defined protection coordination strategies for transmission links protection and belonging HVDC converters under DC fault conditions. The proposed protection coordination prevents unnecessary tripping of MMCs in the multi-area HVDC grids and supports the system with minimum effect on healthy parts. For the first time, different HVDC Converter Tripping (HCT) profiles are presented based on a fully selective protection strategy and their characteristics are discussed comprehensively. Simulation results demonstrate the effectiveness of the proposed strategy for multi-terminal MMC-based HVDC grids. The proposed coordination can be applied to DC grid code requirements of meshed HVDC grids in the future.
AB - Fast progress of High Voltage Direct Current (HVDC) technology has been considerable over the past decades. Emerging Modular Multilevel Converter (MMC) provides power systems with promising solutions to integrate large-scale renewable energy sources, as well as multiple asynchronous power grids. Consequently, implementation of a multi-terminal HVDC transmission system has been easier using MMC converters. However, protection of multi-terminal MMC-based HVDC grids under DC fault conditions is a challenge for the industry. This study sheds light on concept of system-level DC protection coordination for multi-terminal HVDC grids. Although, there are different protection methods for HVDC transmission systems including multi-terminal ones, there are no well-defined protection coordination strategies for transmission links protection and belonging HVDC converters under DC fault conditions. The proposed protection coordination prevents unnecessary tripping of MMCs in the multi-area HVDC grids and supports the system with minimum effect on healthy parts. For the first time, different HVDC Converter Tripping (HCT) profiles are presented based on a fully selective protection strategy and their characteristics are discussed comprehensively. Simulation results demonstrate the effectiveness of the proposed strategy for multi-terminal MMC-based HVDC grids. The proposed coordination can be applied to DC grid code requirements of meshed HVDC grids in the future.
KW - HVDC Integration
KW - power system faults
KW - power system transients
UR - http://www.scopus.com/inward/record.url?scp=85180872262&partnerID=8YFLogxK
U2 - 10.1049/rpg2.12903
DO - 10.1049/rpg2.12903
M3 - Journal article
SN - 1752-1416
VL - 18
SP - 187
EP - 199
JO - IET Renewable Power Generation
JF - IET Renewable Power Generation
IS - 2
ER -