Investigative summary of the July 1993 Nebraska Public Power District Grand Island-Moore 345 kV transmission line failure

Author

Oswald, Bob ; Schroeder, Dennis ; Catchpole, Peter ; Carrington, Ron ; Eisinger, Bill

Author_Institution

Nebraska Public Power District, Columbus, NE, USA

fYear

1994

fDate

10-15 Apr 1994

Firstpage

574

Lastpage

580

Abstract

Nebraska Public Power District (NPPD) lost 64 miles (406 structures) of 345 kV transmission line to a severe wind storm on July 8, 1993. Transmission lines with the characteristics of this line are all at high risk of catastrophic, costly failures. NPPD investigated the failure of the line with the assistance of POWER Engineers, Inc. The probable mechanics of the failure were identified and recommendations were offered to reduce the costs associated with such catastrophic failures. Most of the recommendations are broad in nature and of value to the designers and owners of similar lines everywhere. This paper describes the transmission line, its failure and the recommendations useful to avoiding such costly events in the future

Keywords

economics; failure analysis; overhead line mechanical characteristics; power overhead lines; power system reliability; storms; 345 kV; EHV transmission line failure; USA; characteristics; costs; design; mechanics; recommendations; wind storm; Blood; Ice; Mechanical energy; Poles and towers; Power transmission lines; Storms; Substations; Tornadoes; Wind; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference, 1994., Proceedings of the 1994 IEEE Power Engineering Society

Conference_Location

Chicago, IL

Print_ISBN

0-7803-1883-8

Type

conf

DOI

10.1109/TDC.1994.328426

Filename

328426