Title :
Ground fault protection in ENEL Distribuzione´s experimental MV loop line
Author :
Capasso, Andrea ; Calone, R. ; Lama, R. ; Lauria, S. ; Santopaolo, A.
Author_Institution :
Sapienza Univ. of Rome, Rome, Italy
fDate :
March 31 2014-April 3 2014
Abstract :
The paper describes the design and implementation of a new protection system consisting of a permissive overreach (PO) pilot relaying scheme with directional overcurrent relays for both phase and ground faults supporting closed-loop operation in MV network; attention is focused on ground fault relaying of loop networks operated with ungrounded or compensated neutral. Relevant zero-sequence quantities are studied and changes to relay settings are proposed and verified by detailed simulations. The system, developed within the framework of “Piano Operativo Interregionale” (POI) funded by Italian Government, will soon enter service in an Enel Distribuzione (hence:Enel-D) network.
Keywords :
power distribution faults; power distribution protection; relay protection; Enel Distribuzione network; Enel-D network; Italian Government; MV loop line; PO pilot relaying scheme; Piano Operativo Interregionale; closed-loop operation; compensated neutral; ground fault protection; loop networks; permissive overreach scheme; phase faults; relay settings; relevant zero-sequence quantities; ungrounded neutral; Advanced Fault Passage Indicators; Ground fault relaying; MV closed-loop; Protection system; Smart Grid;
Conference_Titel :
Developments in Power System Protection (DPSP 2014), 12th IET International Conference on
Conference_Location :
Copenhagen
Print_ISBN :
978-1-84919-834-9
DOI :
10.1049/cp.2014.0060
