Lightning protection of distribution systems. Final report
Research work on the lightning protection of distribution systems is described. The rationale behind the planning of the first major phase of the work - the field experiments conducted in the Tampa Bay area during August 1978 and July to September 1979 is explained. The aims of the field work were to characterize lightning in the Tampa Bay area, and to identify the lightning parameters associated with the occurrence of line outages and equipment damage on the distribution systems of the participating utilities. The equipment developed for these studies is fully described. The field work provided: general data on lightning - e.g., electric and magnetic fields of cloud and ground flashes; data from automated monitoring of lightning activity; stroke current waveshapes and peak currents measured at distribution arresters; and line outage and equipment damage on 13 kV networks in the Tampa Bay area. Computer aided analyses were required to collate and to process the accumulated data. The computer programs developed for this work are described. Improved models of the lightning ground flash were developed and incorporated into improved analytical methods for calculating the response of distribution system to overvoltages produced by direct strokes and by induction from nearby strokes. The development of the following are described: an improved model of the leader, and its incorporation into the electrogeometric method for determining the point of contact at ground level; a more detailed model of the lightning ground flash, and its incorporation into a computer program for calculating line outage rates due to direct lightning strikes; and a multi-conductor travelling wave technique for calculating voltage and current surges on the phase conductor and the neutral of an unshielded distribution line subject to a direct lightning strike.
- Research Organization:
- Florida Univ., Gainesville (USA)
- DOE Contract Number:
- AS01-78ET29066
- OSTI ID:
- 6888047
- Report Number(s):
- DOE/ET/29066-1; ON: DE83003979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
DATA
DATA ACQUISITION SYSTEMS
ELECTRICAL EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FEDERAL REGION IV
FLORIDA
INFORMATION
LIGHTNING ARRESTERS
NORTH AMERICA
NUMERICAL DATA
OVERVOLTAGE
PERFORMANCE
POWER DISTRIBUTION SYSTEMS
RESEARCH PROGRAMS
SAFETY
SURGES
USA