Title :
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
fDate :
5/1/1999 12:00:00 AM
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;
Journal_Title :
Power Systems, IEEE Transactions on
