| Abstract: |
| High voltage direct current (HVDC) transmission is an economical option for transmitting a large amount of power
over long distances. Initially, HVDC was developed using thyristor-based current source converters (CSC). With the
development of semiconductor devices, a voltage source converter (VSC)-based HVDC system was introduced, and
has been widely applied to integrate large-scale renewables and network interconnection. However, the VSC-based
HVDC system is vulnerable to DC faults and its protection becomes ever more important with the fast growth in
number of installations. In this paper, detailed characteristics of DC faults in the VSC-HVDC system are presented.
The DC fault current has a large peak and steady values within a few milliseconds and thus high-speed fault
detection and isolation methods are required in an HVDC grid. Therefore, development of the protection scheme
for a multi-terminal VSC-based HVDC system is challenging. Various methods have been developed and this paper
presents a comprehensive review of the different techniques for DC fault detection, location and isolation in both
CSC and VSC-based HVDC transmission systems in two-terminal and multi-terminal network configurations. |
| Key words: HVDC, VSC, Multi-terminal DC grid, DC fault, Fault detection and location, Fault isolation |
| DOI：10.1186/s41601-020-00173-9 |
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| Fund: |
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