Lessons Learned

Analysis of Simultaneous Faults Using Short Circuit Simulations and Fault Records

Simultaneous or multi-circuit faults can be a challenging task to analyze. Prior to 1990 it was very difficult to simulate a simultaneous fault. Advances in short circuit modeling software allows for the modeling of simultaneous faults. In addition, fault records captured by disturbance monitoring equipment and protective relays, provide valuable insight as to the nature of the fault. National Grid has benefited by combining the use of short circuit simulation software and fault records for reliably determining the actual scenarios resulting from these simultaneous or multi-circuits faults.

This article describes the benefits obtained by applying real life data in simulations. More

Relion advanced protection & control.
BeijingSifang June 2016