Development of static switch with high speed algorithm to fault detection

This paper presents the updated results on research for development of a static switch for operation in medium voltage. It shows the results of the algorithm that detects an outage and enables the digital processing to control the static switch. This algorithm was based on the Clarke and Park transforms. The operation of the switch consists of transferring the power supply from the main source, where an outage occurred, to an alternative power source (backup). The load stays off for a time of milliseconds. A low voltage prototype was built, to allow the evaluation of the algorithm. Then a prototype of the static switch was built in voltage of 13,8kV. The first tests - feeding resistive load - are presented in voltage of 13.8 kV.