Open AccessProtection schemes and settings of DC distribution systems
Author(s) -
Ke Jia,
Cong Chen,
Qijuan Zhao,
Tao Feng,
Tianshu Bi,
Haijun Liu
Publication year - 2020
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2019.1800
Subject(s) - flexibility (engineering) , fault (geology) , converters , transient (computer programming) , reliability engineering , power system protection , computer science , identification (biology) , line (geometry) , engineering , scheme (mathematics) , electronic engineering , control engineering , voltage , control theory (sociology) , electric power system , electrical engineering , mathematics , control (management) , power (physics) , artificial intelligence , mathematical analysis , operating system , geometry , quantum mechanics , statistics , physics , seismology , geology , biology , botany
Flexible DC distribution system has become the research and development trend of the future distribution network with its unique advantages such as high efficiency and flexibility. However, the DC fault identification and protection is challenging due to the fact that the short‐circuit current provided by converters is limited and last for a very short period, how to identify and isolate faults reliably using limited fault transient information becomes a serious problem faced by system protection. Based on the analysis of the fault characteristics of three typical faults in the DC distribution system, the setting principle and the calculation methods are proposed, and the reasonable range of protection setting boundaries is derived. According to the requirements of protections, the parameters of the actual DC distribution system are used for setting calculations, and a complete set of DC line protection schemes is designed in this study. Finally, the performance of the proposed protection scheme is verified in PSCAD/EMTDC simulation platform, the built simulation model has been successfully applied to the analysis and calculation in the commissioning of the DC distribution system.