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Title: The influence of time coordination method on supply reliability
Authors: So, CW
Li, KK
Keywords: Evolutionary computation
Industrial power systems
Overcurrent protection
Power system protection
Power system reliability
Relay protection
Issue Date: 2000
Publisher: IEEE
Source: Conference Record of the 2000 IEEE Industry Applications Conference Industry Applications Conference, 2000, 8-12 October 2000, Rome, v. 5, p. 3248-3253 How to cite?
Abstract: The inverse definite minimum time lag (IDMTL) overcurrent (OC) and earth fault (EF) protection are the main as well as the backup protection in the industrial power system. They are also responsible for clearing the busbar fault. If the protection system is not properly coordinated, the incorrect sequence of relay operations to clear the busbar fault will result in excessive outage in the industrial supply system. The time coordination method (TCM) can help to solve the protection relay setting coordination problem. It can systematically search out the optimum protection relay settings disregarding the relay operating principles. This paper shows that correct backup protection operations can also improve the supply reliability. The supply reliability influenced by the protection relay operations on the unclear fault is calculated. The results show that the protection relay settings coordinated by TCM in the industrial supply system can achieve higher supply reliability
ISBN: 0-7803-6401-5
ISSN: 0197-2618
DOI: 10.1109/IAS.2000.882631
Appears in Collections:Conference Paper

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