Modeling of transmission line exposure to direct lightning strokes

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/61.103694· OSTI ID:6457370

Rizk, F A.M. ^[1]

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1. Institut de Recherche d'Hydro-Quebec, Varennes, PQ (Canada)

The paper introduces a new model for assessing the exposure of free-standing structures and horizontal conductors above flat ground to direct lightning strokes. The starting point of this work is a recently developed criterion for positive leader inception, modified to account for positive leaders initiated under the influence of a negative descending lightning stroke. Subsequent propagation of the positive leader is analyzed to define the point of encounter of the two leaders which determines the attractive radius of a structure or the attractive lateral distance of a conductor. These parameters are investigated for a wide range of heights and return-stroke currents. A method for analyzing shielding failure and determining the critical shielding angle is also described. The predictions of the model are compared with field observations and previously developed models.

• OSTI ID: 6457370
• Journal Information: IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (USA), Vol. 5:4; ISSN 0885-8977
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
ELECTRICAL INSULATORS
PERFORMANCE
LIGHTNING
ENVIRONMENTAL IMPACTS
COMPUTERIZED SIMULATION
DESIGN
FIELD TESTS
PLANNING
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
EQUIPMENT
SIMULATION
TESTING
240500* - Power Transmission & Distribution- Environmental Aspects- (1990-)
240100 - Power Systems- (1990-)