DocumentCode :
3509038
Title :
A secure generator distance phase backup protection setting for enhancing generator overexcitation thermal capability during system disturbances
Author :
Elsamahy, Mohamed ; Faried, S.O. ; Sidhu, Tarlochan S.
Author_Institution :
Dept. of Electr. Power & Energy, Mil. Tech. Coll., Cairo, Egypt
fYear :
2012
fDate :
10-12 Oct. 2012
Firstpage :
117
Lastpage :
122
Abstract :
In this paper, investigations are carried out to explore the impact of generator distance phase backup protection (Relay (21)) on the generator overexcitation thermal capability. These investigations have included the performance of Relay (21) when it is set to provide thermal backup for the generator during two common system disturbances, namely a system fault and a sudden application of a large system load while the overexcitation limiter (OEL) is in service. The results of these investigations have shown that the current setting of Relay (21) for generator thermal backup protection restricts the overexcitation thermal capability of the generator. Such a restriction does not allow the generator to supply its maximum reactive power during such events. The paper highlights the need for conducting in-depth dynamic stability studies to evaluate the existing setting of the generator distance phase backup protection relay in order to allow the generator to fulfill the system requirements during major disturbances to ensure adequate level of voltage stability.
Keywords :
AC generators; power generation faults; power system dynamic stability; relay protection; OEL; generator distance phase backup protection setting; generator overexcitation thermal capability enhancement; generator thermal backup protection; in-depth dynamic stability; maximum reactive power; overexcitation limiter; protection relay; relay performance; system disturbances; system fault; system load; voltage stability; Generators; Impedance; Impedance measurement; Power system stability; Relays; Thermal stability; Trajectory; Generator capability limits; generator distance phase backup protection; generator overexcitation limiters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Power and Energy Conference (EPEC), 2012 IEEE
Conference_Location :
London, ON
Print_ISBN :
978-1-4673-2081-8
Electronic_ISBN :
978-1-4673-2079-5
Type :
conf
DOI :
10.1109/EPEC.2012.6474934
Filename :
6474934
Link To Document :
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