Ultra High Speed Single-Ended Traveling Wave Based Protection of Transmission Lines after Auto-Reclosure

The auto-reclosure take place after a fault in power lines, in order to remove the temporary fault and reconnect the line as fast as possible. As there is no information whether the fault is temporary or permanent, the auto-reclosure will be carried out for permanent faults too. In the latter case, reconnecting the power line can result in extensive damage and it can even increase the restoration time. As a result, putting an end to auto-reclosure on a permanent fault is really important.

Considering the speed and reliability of the traveling wave protection method, this research considers it for an auto-reclosure case. Double-ended and single-ended traveling wave based protection schemes are proposed for after auto-reclosure using different parameters such as traveling waves attenuation, polarity and arrival time. Finally, extensive simulation has been carried out to verify the proposed scheme, where all the results confirm the effectiveness of the new practices.