The protection of electrical power systems: a critical review of present-day practice and recent progress
作者:
H.Leyburn,
C.H.W.Lackey,
期刊:
Proceedings of the IEE - Part II: Power Engineering
(IET Available online 1952)
卷期:
Volume 99,
issue 67
页码: 47-59
年代: 1952
DOI:10.1049/pi-2.1952.0013
出版商: IEE
数据来源: IET
摘要:
The paper deals with the protection of generators, power transformers, feeders and busbars and with the characteristics of protective transformers. The subject-matter has been selected for the following purposes:(a) To raise some controversial issues relating to protective-gear practice in order to promote discussion upon them in the hope that this will lead to more general agreement. Among these issues are over-current and negative-phase-sequence protection of generators, earthing of the neutral point, the use of Post Office pilot wires for protection, the application ofcarrier-distance protection, the duplication and supervision of busbar-zone protection, and the overlapping of current-transformers.(b) To outline some new problems which have arisen.(c) To describe some new developments of importance, such as instantaneous differential protective system for power transformers, high-resistance pilot-wire scheme, a starting scheme for carrier protection and a biased differential system of busbar-zone protection.(d) To examine briefly the performance requirements of protective transformers.
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