An Accurate Computer Method for Obtaining Boundary Conditions in Faulted Power Systems

This paper details an accurate technique to solve the three-phase power system equations under faulted conditions. The technique makes use of frequency domain simulation to provide a means of representing the transmission line with frequency dependent parameters. Faults can be simulated at any location along the line and at any time of fault inception. The technique enables a more accurate representation of synchronous machines to be combined with a transmission line model having distributed frequency dependent parameters. A typical power system example along with the modeling details illustrate the practicality and accuracy of the method.