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DC transmission has a lot of merits compared with AC transmission. For example, the cost of the construction and the equipment is less than that of the AC transmission system. Besides, more energy can be transmitted in DC transmission lines. Recently, multi-terminal transmission lines are required urgently. For that purpose, the reliable DC transmission circuit breakers must be developed. As we all...
The rising rate of short-circuit current in some DC systems is very high, using superconductor in DC systems can limit the fault current quickly far before the peak value of the fault current comes. However, superconductor may be destroyed by high current or long duration current. The objective of this paper is to illustrate impacts of high current on superconductor and long duration current withstanding...
The objective of this paper is to experimentally investigate the DC current switching characteristic of a combined DC circuit breaker. The DC circuit breaker, which is a combination of a DC switch and a fuse, has a significant advantage in full-range DC current switching. When a load current or an over-load current emerges, the DC load switch has the ability to clear the current. However, when a short-circuit...
The unavailability of high-capacity HVdc circuit breakers (CBs) is one of the key stoppers for building HVdc multiterminal networks. As the dc does not have a natural current zero, its interruption is very different. The objective of this paper is to propose a new type of dc CB (DCCB), including a current-limiting part and an interrupting part, which can interrupt a high short-circuit current. Experimental...
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