Short-Circuit Fault Current Calculation Method for the Multi-Terminal DC Grid Considering the DC Circuit Breaker

Haipeng Jia, Jingyuan Yin, Tongzhen Wei, Qunhai Huo, Jinke Li and Lixin Wu
Additional contact information
Haipeng Jia: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Jingyuan Yin: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Tongzhen Wei: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Qunhai Huo: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
Jinke Li: China Energy Engineering Group, Jiangsu Power Design Institute Co., LTD, Nanjing 211102, China
Lixin Wu: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China

Energies, 2020, vol. 13, issue 6, 1-23

Abstract: The analysis and calculation of the short-circuit fault current in the DC grid is of great significance to the design and configuration of the converter station and DC circuit breaker parameters. The existing flexible DC system not only includes the modular multilevel converter (MMC) converter, but also needs power equipment such as the fault current limiter and DC circuit breaker. Therefore, the system modeling and short circuit calculation of the multi-terminal DC system after adding the DC circuit breaker are also of great significance for the design of DC power system parameters and the grid troubleshooting ability. In this paper, firstly, the parameters of the four-terminal DC system of the modular multilevel converter (MMC) are simplified, and the analytical solution of the short circuit fault current of the multi-terminal DC system is given. Then, the external characteristics of the cascaded hybrid DC circuit breaker are modeled. Based on the equivalent circuit of the fault current in different stages, the short circuit calculation method of four-terminal MMC system with DC circuit breaker is obtained. This method can effectively describe the overall trend of fault current and provide the basis for the configuration of DC line protection settings and DC circuit breaker related parameters.

Keywords: MMC; hybrid DC circuit breaker; multi-terminal flexible DC system; short circuit current calculation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/6/1347/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/6/1347/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:6:p:1347-:d:332372

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().