Phase-Phase Switching Surges on 500-kV Transformer-Terminated Lines, Part I: 500-kV Circuit-Breaker Operation

An investigation of the effects of system and transformer parameters on phase-phase switching surges on transformer-terminated 500-kV lines was conducted on a transient network analyzer. The results of this study are presented, including surge magnitudes, waveshapes, and the line-neutral polarity components comprising the phase-phase surges. Typical surge distribution curves are also discussed.