DocumentCode :
1022373
Title :
Performance Requirements for Relays on Unusually Long Transmission Lines
Author :
Poage, F.C. ; Streifus, C.A. ; MacGregor, D.M. ; George, E.
Author_Institution :
Electrical engineer with Ebasco Services, Inc., New York, N. Y.
Volume :
62
Issue :
6
fYear :
1943
fDate :
6/1/1943 12:00:00 AM
Firstpage :
275
Lastpage :
283
Abstract :
Analysis of fundamental bases of relaying made as part of the engineering for the 270-mile 154-kv interconnection between systems of Nebraska Power Company and Kansas Gas and Electric Company reveals that, of current, phase angle, impedance, and impedance angle, none alone offers satisfactory discrimination among open-circuit, short-circuit, and load conditions. Combination of input-impedance magnitude Z and impedance angle ??=tan??1X/R is studied by means of ``impedance circle diagrams´´ of the interconnecting circuit. On these diagrams is charted the dynamic behavior of the interconnected systems during faults and surges of synchronizing power. The desirable areas of trip and no trip are mapped, and general specifications for the performance of relay systems are presented in terms of impedance magnitude and angle, Z ?? ??. Thereby full advantage can be taken of all possible synchronizing power inherently available over the interconnection and at the same time faults and approach of out-of-step condition can be recognized properly.
Keywords :
Circuit faults; Impedance; Integrated circuit interconnections; Interconnected systems; Power engineering and energy; Power system interconnection; Power system relaying; Power transmission lines; Relays; Transmission lines;
fLanguage :
English
Journal_Title :
American Institute of Electrical Engineers, Transactions of the
Publisher :
ieee
ISSN :
0096-3860
Type :
jour
DOI :
10.1109/T-AIEE.1943.5058710
Filename :
5058710
Link To Document :
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