Abstract
This paper describes a high-speed switching system for distribution networks that was developed with the aim of improving power supply reliability (reducing the number of supply interruptions) of distribution systems. When a fault occurs in conventional distribution systems, the fault section is isolated using a sequential time-out control scheme that requires the reclosing and re-reclosing of the entire system. A major drawback of such systems is that normal sections are also subjected to unnecessary power supply interruptions. In order to resolve this problem, we have developed a high-speed switching system that isolates only the fault section without interrupting the power supply to normal sections. This new system can fully restore power to the normal sections and can completely isolate the fault section within 500 ms in the case of a ground fault. © 1998 Scripta Technica, Electr Eng Jpn, 125(3): 1–10, 1998
Published Version
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