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

fYear

2014

fDate

March 31 2014-April 3 2014

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

iet

Conference_Titel

Developments in Power System Protection (DPSP 2014), 12th IET International Conference on

Conference_Location

Copenhagen

Print_ISBN

978-1-84919-834-9

Type

conf

DOI

10.1049/cp.2014.0060

Filename

6822868