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Content Provider | IET Digital Library |
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Author | Xiang, Bin Luo, Jinhui Gao, Lei Wang, Jianhua Geng, Yingsan Liu, Zhiyuan Ding, Tao |
Abstract | The cooperative characteristics of resistive superconducting fault current limiters (R-SFCLs) and DC circuit breakers (DCCBs) have been investigated with regard to the fault clearing in modular multilevel converter (MMC)-based multiterminal direct current (MTDC) grids. However, research is lacking in complete protection solutions that combine R-SFCLs and mechanical DCCBs while considering the backup protection and the effect of R-SFCLs on the fault characteristics of MMCs. This study investigates a fault current breaking scheme that includes primary and backup protection. Moreover, the fault characteristics of MMCs with R-SFCLs are analysed, and the fault transient process is divided into three stages. Then two fault current limiting schemes with R-SFCLs located at the converter output or the line are proposed. These two protection schemes are applied to the DC test system, verified and compared. The results show that in both schemes, the size of the designed R-SFCL should be generally a few tens of Ω. These R-SFCLs maintain the converters unblocked until the primary breakers or backup breakers interrupt the fault currents, and the M-DCCBs are only required to break several kA currents. After a fault occurs, the system will restore within 200 ms for primary protection or 250 ms for backup protection. |
Starting Page | 3422 |
Ending Page | 3432 |
Page Count | 11 |
ISSN | 17518687 |
Volume Number | 14 |
e-ISSN | 17518695 |
Issue Number | Issue 17, Sep (2020) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/14/17 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1546 |
Journal | IET Generation, Transmission & Distribution |
Publisher Date | 2020-05-28 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Backup Breaker Circuit Breaker D.C. Transmission DC Test System Fault Characteristic Fault Clearing Fault Current Breaking Scheme Fault Current Limiting Scheme Fault Transient Process HVDC Power Converter Mechanical DC Circuit Breaker Mechanical DCCB MMC-MTDC Grid Modular Multilevel Converter Multiterminal Direct Current Grid Power Electronics Power Grid Power Supply Power Transmission Protection Primary Breaker Primary Protection Protection Apparatus R-SFCL Reliability Resistive-type Superconducting Fault Current Limiters Superconducting Fault Current Limiters Supervisory Circuit Switch Time 200.0 Ms Time 250.0 Ms Voltage-source Converter |
Content Type | Text |
Resource Type | Article |
Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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