Conditions for increasing DER anti-islanding protection frequency range

Thumbnail Image

Files

CIRED 2019 - 1319.pdf (500.89 KB)

Paper number

1319

Working Group Number

Conference name

CIRED 2019

Conference date

3-6 June 2019

Conference location

Madrid, Spain

Peer-reviewed

Yes

Short title

Convener

Authors

Veríssimo, Miguel, EDP Distribuição, Portugal
Neves, André, EDP Distribuição, Portugal
Louro, Miguel, EDP Distribuição, Portugal
Lopes Filipe, Nuno, EDP CENT / Labelec, Portugal
Leiria, Andreia, EDP Labelec, Portugal
Ferreira, Luís Marcelino, Ambertree, Portugal
Carvalho, Pedro, AmberTREE, Portugal
Carvalho, Fernando, Ambertree, Portugal

Abstract

The changing of the traditional generation profile from TSO-connected to DSO-connected can have the potential to amplify system frequency events if due care is not taken.Commission Regulation (EU) no. 2016/631 established a wider frequency range that Distributed Generation (DG) modules need to comply with, being the driver for increasing the DER contribution to grid stability and security in case of system disturbances. However, those changes may increase the chance of unwanted islanding in the distribution network. Islanding, by itself, does not constitute a situation that needs to be totally prevented. When planned, or controlled, it may be a useful mode of operation in some cases.Currently, frequency protections at the DG level, among other functions, are used by the DSO not only to respond to a systemic event, but also to eliminate unwanted islanded systems. Extending frequency parameters may not be a reliable solution for both systemic and local events. Especially in the presence under-frequency load shedding schemes which will tend to adapt the load to the generation in the network. Hence, other ways for unwanted islanding detection may be required.An extensive study on islanding formation was carried out considering real and simulated scenarios based on two sections of EDPD’s grid connected to different types of generation. It was found that unwanted islanding may occur even without active frequency control generation.Considering the results, this paper will also present the strategy envisioned for the Portuguese grid aiming to contribute to an European synchronous system resilience using additional communication-based anti-islanding detection methods.

Table of content

Keywords

Publisher

AIM

Date

2019-06-03

Published in

CIRED 2019 Conference

Permanent link to this record

https://cired-repository.org/handle/20.500.12455/364
http://dx.doi.org/10.34890/590

ISSN

2032-9644

ISBN

978-2-9602415-0-1