Open AccessModeling and Analysis of Short-Circuit Fault Current for MMC-HVDC Grid with DC Circuit Breaker
Author(s) -
Haipeng Jia,
Jingyuan Yin,
Tongzhen Wei,
Jie Li,
Linlin Wu
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/508/1/012039
Subject(s) - circuit breaker , fault (geology) , arc fault circuit interrupter , short circuit , modular design , electrical engineering , transient recovery voltage , equivalent circuit , electronic engineering , power (physics) , computer science , grid , engineering , voltage , power factor , constant power circuit , physics , mathematics , seismology , geology , operating system , geometry , quantum mechanics
DC line fault is one of the important factors restricting the development of flexible DC system. DC circuit breaker is an effective means to realize the short circuit fault isolation on DC side of flexible DC system. Therefore, it is necessary to add DCCB into the short-circuit current calculation and modeling of MMC-HVDC power grid for comprehensive analysis. Firstly, the external characteristics of the hybrid HVDC circuit breaker and the modular multilevel converter (MMC) are modelled. Then, the modeling of short-circuit fault current in different stages was analysed. The analysis method of short circuit fault current of four-terminal MMC system with DC circuit breaker is obtained. Finally, the simulation results and the calculation results are compared and results show the effectiveness of the short-circuit calculation method proposed by this paper.