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.
Ground fault protection in ENEL Distribuzione’s experimental MV loop line / Capasso, Alfonso; R., Calone; R., Lama; Lauria, Stefano; A., Santopaolo. - (2014), pp. 1-6. (Intervento presentato al convegno 12th IET International Conference on Developments in Power System Protection, DPSP 2014 tenutosi a Copenhagen (Danimarca) nel 31 mar - 3 apr 2014) [10.1049/cp.2014.0060].
Ground fault protection in ENEL Distribuzione’s experimental MV loop line
CAPASSO, Alfonso;LAURIA, Stefano;
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
