The study of the reliability indices of distribution networks with VIT switches on the MV feeders automation

In this paper, VIT feeder automation switches are presented and its effects on improving electric distribution network reliability for a real MV feeder of North Khorasan Electric Distribution Company (Iran), are analyzed. This is done through numerical calculations and network reliability index calculation with Failure Effect Analysis method (FEA). Also, in this research, a real feeder in a distribution network on which VIT automation switches are installed and are operational is simulated in DIgSILENT PowerFactory software package. The main advantages of this automatically operated equipment are: operate in loop rural network that are mountainous and impassable, fast network reconfiguration, reliability improving and no need for communication subtraction.