Transients on transmission systems: data presentation and analysis

Technical Report · Fri Feb 28 23:00:00 EST 1986

OSTI ID:6149035

Mauser, S F; Perkins, M D

This report contains an analysis of transient data collected with the EPRI Transient Monitoring Laboratories at the Andytown 500-kV and Lauderdale 138-kV Substations on the Florida Power and Light systems. 141 transient events at Andytown and 200 transient events at Lauderdale were recorded. The transient events include results of staged tests and those observed during normal system operation. The report contains a summary of the 341 transient events along with an analysis of the most significant individual events. The events analyzed in this report are grouped according to type into three different categories: lightning, switching, and faults. Of the eight recorded lightning surges to the conductors (i.e., shielding failure or backflash), the two at Lauderdale resulted in faults, and two out of the six at Andytown resulted in faults. In the switching surge analysis presentation, the phase-to-ground overvoltages from all switching events are tabulated. In the fault analysis, voltage and current waveforms for 28 of the 37 fault events were produced. In one particular fault event, a lightning flashover caused a large asymetrical fault current to flow, which caused saturation in the relaying current transformers.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Dept.
• OSTI ID: 6149035
• Report Number(s): EPRI-EL-4403; ON: TI86920208
• Country of Publication: United States
• Language: English

Related Subjects

200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
CURRENTS
DATA
DATA ANALYSIS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
ELECTRICAL FAULTS
ENERGY SYSTEMS
EQUIPMENT
EXPERIMENTAL DATA
FLASHOVER
HVAC SYSTEMS
INFORMATION
LIGHTNING
NUMERICAL DATA
POWER SUBSTATIONS
POWER SYSTEMS
TRANSFORMERS
TRANSIENTS