A Methodology for the Efficient Application of Controlled Switching to Current Interruption Cases in High-Voltage Networks

摘要

Transients produced upon the opening operation of a circuit-breaker may be harmful for the network elements and the switching device. A modern countermeasure for the reduction of such transients is controlled switching. Fundamental requirement for all controlled switching applications is the precise definition of the desired switching times. In this paper a new methodology is proposed for the calculation of the optimum switching instants, taking into account circuit-breaker's statistical scatters in the contact operation time and the slope of the contact gap voltage withstand characteristic.