A new model for outaging transmission lines in large electric networks

Author

Preston, Eugene G. ; Baughman, Martin L. ; Grady, W. Mack

Author_Institution

City of Austin Electr. Utility Dept., TX, USA

Volume

14

Issue

2

fYear

1999

fDate

5/1/1999 12:00:00 AM

Firstpage

412

Lastpage

418

Abstract

This paper presents a new method for calculating line currents for multiple line outages in large electric networks at extremely high computational speeds. An example is given showing that only one minute of computation time is needed to test 160 k N-3 line outage configurations for a large network. Resulting line overloads are shown to agree well with AC load flow. The new method: (1) calculates line currents and powers for any set of multiple line outages; (2) tests for system separation due to lines outaged; (3) tests for electrical remoteness of lines being outaged; and (4) updates real power line distribution factors used in linear programming and probabilistic models. The method is restricted to passive networks in which tapped transformers are near unity

Keywords

fault currents; linear programming; power transmission faults; power transmission lines; probability; transmission network calculations; 160 k N-3 line outage configurations; AC load flow; computation time; large electric power networks; line currents calculation; linear programming; multiple line outages; passive networks; power line distribution factors; probabilistic models; tapped transformers; transmission line outages model; Admittance; Computer networks; Intelligent networks; Load flow; Power engineering computing; Samarium; Sparse matrices; System testing; Transformers; Transmission lines;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.761858

Filename

761858