COMMUNICATION-BASED PERMISSIVE PROTECTION SCHEME FOR POWER DISTRIBUTION NETWORKS

摘要

A communication-based permissive protection method for protecting anelectrical power distribution network from a fault. The network includes apowersource, an electrical line and a plurality of fault interrupters, where thefaultinterrupters are operable to prevent current flow in response to the fault.Themethod includes detecting the fault by each fault interrupter that is betweenthefault and the power source, and sending a drop of voltage message from eachfault interrupter that doesn't detect the fault, but does detect a drop ofvoltage asa result of the fault to its immediate upstream fault interrupter. The methodopensthe fault interrupter that both detects the fault and receives a drop ofvoltagemessage from all of the fault interrupters immediately downstream of thatfaultinterrupter.