New Three-Phase Static Transfer Switch using AC SSCB

Abstract

These days, widespread use of sensitive loads and distributed generators makes static transfer switch (STS) an essential component in power circuits to achieve a good power quality for AC Grids. In case that fault occurs, previous STS cannot break the fault current. However, the proposed STS can break quickly even if a short-circuit fault occurs. Also if there is power quality problems such as Sag/Swell, the proposed STS quickly transfers the load to the good quality source. It is anticipated that the proposed STS may be utilized to realize many reliable AC grid systems.