New DC Solid State Circuit Breaker with reclosing and rebreaking capabilities

Recently according to the development of DC transmission which is high efficiency, stability of DC grid has become a major concern. Therefore, the reliable DC SSCB (Solid-State Circuit Breaker) is required in order to secure high safety. The previous DC SSCB is unstable and many elements are required in order to perform the operating duty. This paper proposes a new DC SSCB. Since the proposed DC SSCB does not cause delay of breaking operation caused by charging operation, it can break an accident quickly. Also, since it can perform the operation duty with a few elements, it is economical. The operating characteristic of the proposed DC SSCB is verified by simulations on short circuit fault. Also, this paper suggests the design guidelines so that it can be applied to any other DC grid.