Controlled switching for fault interruption in transport and distribution lines

The controlled switch became a technical solution for reducing the switching stress. The controlled switching can be applied to any type of commutations. There are now dedicated controllers which are used more often for the switching of the transport and distribution lines, of the small inductive loads, of the capacitors batteries, or for energizing the no load power transformers. The paper deals with the simulation of the commutation of a transportation line by using the distributed parameters model. The controlled switch for fault interruption in transport and distribution lines is compared with the uncontrolled one, highlighting the major differences in what concerns the stress. The primary objective of controlled short-circuit interruption is to restrict the arcing time of the circuit-breaker and thereby seek to reduce the electrical stress and wear on the interrupter.