The key issue of novel wide area backup protection has been concentrated on the rapidly and accurately fault component location. The location method used in this novel backup protection system is mainly relying on the voltage and current synchro-phasors provided by the Wide Area Measurement System, WAMS. Obviously, the faulted component should be determined as soon as possible, which must not exceed the limit of time delay in design principle of backup protection. And then, it is the rest of time that is en...