Patent ID: 8830642
Filing Date: 2014-09-09
Classification: H02H

Abstract:
1. A system for the protection of a power grid against electric faults, comprising: a plurality of circuit breakers each associated with a corresponding grid area, the plurality of circuit breakers including at least a first circuit breaker operatively associated with a first electronic unit and positioned at a first hierarchy level, and one or more additional circuit breakers each including a corresponding second electronic unit and positioned at one or more additional levels hierarchically lower than the first level and in cascade to each other, wherein the first circuit breaker includes at least one semiconductor electronic breaking device, and wherein the first electronic unit is configured to, upon appearance of an electric fault in a grid area: drive the semiconductor electronic breaking device so as to limit the current flowing through the semiconductor electronic breaking device for a predetermined period of time; and send to at least one of the one or more additional circuit breakers an intervention command suitable to allow the intervention, among the circuit breakers that detected the fault, of the circuit breaker positioned closest and immediately upstream of the area where the fault occurred.