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A protection strategy for Multi-terminal HVDC (MTDC) grids based on AC/DC converters without fault handling capability such as half-bridge MMC converters is presented in this paper. The key components of the proposed strategy consist of DC breakers located at each converter station DC side and at each transmission line (overhead line or cable) end, all of them based on low-speed mechanical DC breaker...
A novel protection strategy for multi-terminal high voltage direct current (HVDC) grids based on the implementation of breaking modules (BM) with both limiting and breaking capabilities will be presented. It incorporates a resistive-type superconducting fault current limiter (SFCL) in series with a mechanical DC circuit breaker (DCCB). The proposed arrangement of BMs allows an intrinsic selective...
Many point to point HVDC lines are already in operation in several countries. However, the development of multiterminal DC grids is slowed by the lack of efficient control and protection strategies that can be applied on such grids. This article deals with the protection aspect of those networks. Indeed, the resort to Voltage Source Converters (VSC) changes the constraints since the short circuit...
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